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Volume 1, Issue 3 |
Downloadable
Version
(.pdf format) |
October,2002 |
In
this edition:
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Integrated Audio Comparison
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| Integrated
audio is an add-in IC chip solder on to the motherboard to
translate varieties of audio format and send them out to the
speakers. This audio chip cannot be cut out and past onto another
motherboard. Some onboard audio are integrated directly into the
motherboard chipset like the Intel ICH or VIA686x, while others
are add-on third party IC chips. In general, add-on IC's
performance are higher quality then integrated AC' 97 audio found
in chipset but don't usually compare to add-in audio sound card.
Previously, integrated audio was never equal to add-in audio sound
card because it consumes CPU cycle and the lack of
technology. However, with today's cutting edge technology, leading
CPU maker (such as Intel and AMD) and chipset maker (such as
Intel, SiS, VIA, AMD, & ALi) have evolve dramatically. AC '97
quality and performance are equivalent to most high end hard audio
sound card. Except for mainstream audio sound card like Sound
Blaster Audigy. Intel's integrated AC' 97 codec were also
evolving. Going from AC' 97 v1.x to today's widely used AC' 97
v2.2 by many motherboard manufacture and sound card maker.
Intel's AC' 97 next evolution would be AC' 97 v2.3, which will be
20-bit architecture with many other new intelligent features
included. Let's look at
Intel's AC '97 Codec feature which is widely used by million of
motherboard manufacture. AC
'97 Feature List: |
- 16-bit full-duplex stereo audio
Codec (DAC and ADC)
- AC' 97 1.x compliant
indicates fixed 48K sampling rate operation (non-extended
feature set)
- AC' 97 2.1 compliant
indicates extended audio feature set (optional variable rate,
multichannel, etc.)
- AC' 97 2.2 compliant
indicates extended audio, enhanced riser audio support, and
optional S/PDIF)
- 48-pin QFP package and pinout
- 4 analog line-level stereo
inputs; 2 analog line-level mono inputs
- MIC inputs with 20 dB boost,
programmable gain, and AEC reference capability
- Dedicated stereo output (LINE_OUT)
- Additional stereo output (AUX_OUT)
configurable as line level, optional headphone, or optional
4-channel output
- Mono output for speakerphone
- Optional 18-bit or 20-bit DAC
and ADC resolution
- Optional output tone and
loudness controls
- Optional 3D stereo output
enhancement
- Optional 3rd ADC input channel
for dedicated voice input
- Optional integrated S/PDIF
transmitter for digital output
- Comprehensive Power Management
capability
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| AC' 97 Output
Options: |
- Analog stereo output
(LINE_OUT) transmitted to amplified stereo PC
speaker array via stereo mini-jack.
- Amplified analog stereo
headphone output (HP_OUT) transmitted
to headphones or headset via stereo mini-jack.
- Discrete analog
4-channel output (LINE_OUT plus
4CH_OUT) transmitted to Front and Surround amplified stereo PC
speaker arrays via dual stereo mini-jacks.
- Analog matrix-encoded
Surround output (Dolby ProLogic)
transmitted via stereo line level output jack (LNLVL_OUT) to
consumers A/V equipment that drives a home theater multi-speaker
array.
- Digital 5.1 channel
output (Dolby Digital, AC-3)
transmitted via S/PDIF (SPDIF_OUT) to digital ready consumer A/V
equipment which drives a home theater multi-speaker array.
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Common Integrated Audio Chip Chart
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C-Media |
C-Media |
Creative |
Intel |
Realtek |
VIA |
Nvida |
SiS |
Ali |
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Features |
CMI9378 |
CMI8738 PCI-6CH-LX |
CT5880 |
ADI 1881 |
ALC650 |
VT1616 |
APU |
7012 |
M1535D+ |
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AC '97 Codec |
v2.2 |
v2.2 |
No |
v2.2 |
v2.2 |
v2.2 |
No |
v2.2 |
v2.1 |
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3D Audio Enhancement |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
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Channel Support |
2-Basic |
2-Basic |
2-Basic |
2-Basic |
2-Basic |
2-Basic |
2-Basic |
2-Basic |
2-Basic |
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4-Interface |
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4-Interface |
4-Interface |
4-Interface |
4-Interface |
4-Interface |
4-Interface |
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4-Interface |
4-Interface |
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6-Interface |
6-Interface |
6-Interface |
6-Interface |
6-Interface |
6-Interface |
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6-Interface |
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Full-Duplex (DAC&ADC)* |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
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MIDI Synthesizer |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
5.1 Dolby Digital
Surround Sound |
No |
Optional Interface |
Optional Interface |
Optional SoundMAX Interface |
Optional Interface |
Optional Interface |
Optional Interface |
Optional Interface |
No |
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S/PDIF Support * |
No |
Optional Interface |
Optional Interface |
Optional SoundMAX Interface |
Optional Interface |
Optional Interface |
Optional Interface |
Optional Interface |
Optional Interface |
*
S/PDIF (Sony/Philips Digital Interface): S/PDIF
allows the transfer of digital audio signals from one device to another
without having to be converted first to an analog or maintaining the
viability of a digital signal when it is converted to analog. |

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Ultra 320 SCSI |
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Ultra320:
Next Generation SCSI Performance
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The seventh
generation SCSI I/O Bus Interface has recently hit the market.
This
specification is called Ultra320 and has
maximum transfer rate 320MB/second.
This is twice as fast as the previous Ultra160 standard and also
provides other features to improve reliability, performance, and ease
of use. Of course Ultra320 is backwards compatible with previous SCSI standards/device
and there are Ultra320 RAID Controllers for super-fast and reliable
fault-tolerant data storage.
Ultra320 is not
just the next level in the SCSI standard, but a necessary step for the future
growth of storage technology and storage subsystems. With
10K-RPM and 15K-RPM SCSI Hard drives providing extremely fast read/write
data access and burst data speeds, a faster SCSI Bus interface is needed when using multiple
drives (remember that SCSI drives share the same cable/bus per controller, so
when using multiple drives bottlenecks can occur). The increased bandwidth of Ultra320
is a solution to this problem.
It is also the perfect for the high-volume demands of applications such
as databases, streaming digital audio and video, video editing, corporate network servers, and RAID
configurations. See chart below for
details on Ultra320's advanced features.
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| Features of Ultra320 |
Description /
Information |
| Double Transfer
Speed |
Double the transfer
rate of Ultra160 (burst-speed) to 320MB/sec. |
| Quick Arbitration
and Selection (QAS) |
A method for
reducing the overhead of control release on the SCSI bus from one device
to another. Reduces command overhead and maximizes bus utilization. |
| Read and Write
Data Streaming |
Minimizes the
overhead of data transfer by allowing the target to send one data stream
packet (LUN Q-TAG) followed by multiple data packets instead of one LQ
packet for each data packet. |
| Flow Control |
Allows the initiator
to optimize its pre-fetching of data during writes and flushing of data
FIFOs during reads. |
| Training Pattern |
Sends a training
pattern test signal to measure the imbalances in the SCSI bus (signal
skew or delays) and generate corrections to better utilize the data. |
| Pre-compensation |
The higher speed of
Ultra320 causes greater signal attenuation and problems with ISI
(Inter-symbol Interference) which causes bit-distortion due to the SCSI
bus being charged when the signal stays at one voltage level for a long
period of time. Pre-compensation addresses this problem at the
transmission side by reducing the signal's maximum drive level when a
stream of zeroes or ones occurs (no transition). |
| Adjustable Active
Filter (AAF) |
AAF also addresses
the above problems with attenuation and ISI on the receiving side of the
SCSI bus by increasing the signal-to-noise ratio using a method for filtering
out frequencies higher than the maximum Ultra320 SCSI signal frequency. |
| Packetized SCSI |
Improved protocol to
encapsulate command information into packets and transfer them
synchronously at maximum negotiated rate (i.e. 320 MB/sec). |
| Cyclic Redundancy
Check (CRC) |
CRC is an algorithm
that provides improved data protection for the parallel SCSI bus
performing error checking on transmitted bytes. |
| Other Information |
Description /
Information |
| Ultra320 Cards +
64-bit PCI-X Slots |
The use of
the 64-bit PCI-X bus
combined with with Ultra320 allows for maximum bandwidth usage with
multiple drives (thus preventing bottlenecks). PCI-X can deliver up to 1064MB/second (64-bit @
133Mhz). |
| Ultra 320 Cables |
Recommended to use
Ultra320 Flat or Rounded cables. Adaptec recommends
rounded-shielded cables to minimize data loss due to signal attenuation.
See below for more info.. |
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Ultra320 Products
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Ultra320 PCI Cards: Adaptec has
64 bit PCI Ultra 320 RAID cards,
low-profile Ultra320 RAID and ZCR (Zero-Channel RAID) cards on the market.
Click
Here for Adaptec Ultra320 Product Info
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Ultra320Drives: Maxtor, Seagate, IBM
all have developed Ultra320 SCSI hard drives in 68-pin and 80-pin SCA
(hot-swappable) formats. |
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Ultra320
Barebone Systems: Supermicro already has systems with Ultra320 embedded SCSI controllers and
hot-swap drive bays.
These include Supermicro SuperServer 6012P-8, SuperServer
6022P-8/8R, Superserver 7042P-8R. |
| Ultra320 LVD
CABLES: Although backwards compatible with Ultra160
(SPI-3) SCSI LVD
cables it is recommended to use Ultra320 (SPI-4) rated "Flat and
Twist" or "Rounded-Shielded" LVD cables. If you
use Ultra160 LVD cables you risk data-corruption or reducing the bus
speed in half. The
flat cables are fine for shorter distances within cases, but for
longer lengths or where extra electromagnetic "noise" (EMI) may occur,
a rounded-shielded cable is best. |
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Windows XP Service Pack 1 |
After
months of beta and release candidates, on Monday, September 9th, 2002
Microsoft released Windows XP Service Pack 1 to the public. The final
version of the release contains 308 Fixes which include previously released
hot-fixes and security patches. We're not going to list all of the fixes
here for you, but we'll touch on the ones which will probably affect you, or
your customers installations the most.
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KB Article |
Title |
Category |
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Q312370 |
Universal Serial Bus 2.0 Support in Windows XP |
Application Compatibility |
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Various |
Windows XP Application Compatibility Update |
Application Compatibility |
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Q313896 |
DHCP Clients Cannot Obtain an IP Address from
the DHCP Server |
Networking |
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Q308219 |
Hard Disk Performance Is Slower Than You Expect |
Base OS |
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Q318891 |
AMD PowerNow! Technology Support for Windows XP |
Base OS |
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Q319632 |
Device Manager Hangs After You Remove a USB
Camera |
Base OS |
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Q320899 |
Windows XP Generates a "Stop 0xA0" Error Message
During Hibernation |
Base OS |
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Q320008 |
You May Not Be Able to Shut Down Your Windows XP
Computer |
Security |
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Q307274 |
Windows XP Stops Responding (Hangs) During
Windows Shutdown |
Shell |
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Q317277 |
You Receive a "System Has Recovered from a
Serious Error" Message After Every Restart |
Management/Administration |
The most important fixes that are available in this Service Pack are the
Security and Compatibility updates. The added support for USB 2.0 and AMD's
PowerNow! Technology is also something that has been lacking up until now. |
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Microsoft has implemented a fix in service pack 1 which will eliminate users
of pirated versions of Windows XP from updating their software by
downloading this service pack, or by attempting to utilize the Windows
Update web site. |
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| For a
listing of all fixes included in the Windows XP Service Pack 1, please see
the Microsoft web site at:
http://support.microsoft.com/default.aspx?scid=/support/ServicePacks/Windows/XP/SP1FixList.asp
To download service pack one you can either use
your Windows Update feature built into Windows XP, or you can go to
Microsoft and download the full version for network installations directly
from them at:
http://www.microsoft.com/windowsxp/pro/downloads/servicepacks/sp1/default.asp
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Serial ATA |
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Serial ATA F.A.Q. |
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The inconvenience of bulky, difficult ATA cables are about to be a thing of
the past. Motherboard manufacturers have began adding Serial ATA ports to
their boards, Controller card companies are pumping out add-in cards so that
those of us who have those old fashion IDE connectors can play along too. We
have gathered a list of frequently asked questions about Serial ATA in the
hopes that you will better understand and be ready for the transition as it
progresses.
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What is Serial ATA?
Serial ATA is a replacement for the Parallel ATA (Standard IDE) physical
storage interface
What is the benefit of using Serial ATA?
Users will benefit by being able to easily upgrade their storage devices.
Configuration of Serial ATA devices will be much simpler, with many of
today’s requirements on jumper and settings no longer needed. Serial ATA
cables are much thinner and longer than standard IDE cable that we use
today. The use of Serial ATA cables will make it easier to install cabling
and will prevent the blockage of air flow in systems.
Will Serial ATA cost more?
The cost of Serial ATA technology will be the same as today’s Parallel
ATA technology.
Will Serial ATA be compatible with today’s
PCs?
Serial ATA electronics and connectors are different from Parallel ATA,
however the technology is software compatible and OS transparent. Adapters
will be available to allow forward- and backward-compatibility of hard disks
on PC systems.
Besides Hard Disks, what other components
can use Serial ATA?
Serial ATA supports all ATA and ATAPI devices, including CDs, DVDs, tapes
devices, high capacity removable devices, zip drives, and CDRW’s.
Will Microsoft products support Serial
ATA?
Serial ATA is software compatible with Parallel ATA and requires no changes
to Microsoft operating systems, or any other OS as well. |
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| Serial ATA
Connector |
Serial ATA
Cable |
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Side by side comparison of
Serial ATA vs. Standard IDE Connectors
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What Chipsets Support Serial ATA?
Currently none of the shipping Motherboard Chipsets have native
support for Serial ATA. Many manufacturers are shipping boards with
separate Serial ATA Controller Chips onboard, much as they do with ATA
RAID Chips. You can expect to see Serial ATA supported natively
integrated on the motherboards by the end of this year.
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Who Supports Serial ATA?
ASI has many vendors who currently are selling, or developing both
Serial ATA Controller Cards and Serial ATA RAID Cards. For your
convenience, we have listed some of the vendors and web site links
below:
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.NET Technology |
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What is .net? |
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| Microsoft
is once again breaking new ground and causing much confusion over
a new technology, it's called .net.
Microsoft .NET is a set of software
technologies which connect information, people, systems, and
devices. Using XML Web services, new levels of integration between
applications and devices over the internet or intranets are
possible.
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Smart
Devices?
Smart Devices which interact within the .NET strategy are already
all around you. Pocket PC's, Smartphones, Tablet PC's, all the way
down to your Xbox all use the .NET technology. By utilizing the
.NET framework, these devices are able to interact with you and
with each other using XML Web services which enable you to
interact with your data regardless of the location, type, and
number of devices you use.
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Security Issues?
Microsoft knows that we are all concerned with the security of
our systems. An application which can run code autonomously on our
machines is a scary proposition, but Microsoft has a plan in place
which deals with this.
.NET uses Evidence-based Security to protect it's integrity. This
security asks a series of questions through the hardware before
any code can be passed from the framework. These questions are:
- From what site was the
assembly obtained?
Assemblies are the building blocks of .NET Framework
applications. They form the fundamental unit of deployment,
version control, reuse, activation scoping, and security
authorization. An application's assemblies are downloaded to the
client from a Web site.
- From what URL was the
assembly obtained?
The security policy requires the specific address from which the
assembly was downloaded.
- From what zone was the
assembly obtained?
Zones are descriptions of security criteria, such as Internet,
intranet, local machine, and so forth, based on the location of
the code.
- What's the strong name
of the assembly?
The strong name is a cryptographically strong identifier
provided by the author of the assembly. While it does not
provide any authentication of the author, it uniquely identifies
the assembly and ensures that it has not been tampered with.
From the answers received to these
questions, the security policy is appropriately modified and
permissions are granted to the assembly. The evidence requested
can be obtained from multiple different sources including the
common language runtime, the browser, Microsoft ASP.NET, or the
shell.
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Why do
I need .NET?
With the advent of .NET technology Microsoft has created a
fast, simple way for people to save valuable time by not repeating
tasks that have already been done.
One example of this process would be
using the stock in your warehouse. A customer comes to your store
and purchases a product. Normally you would sell this product to
the customer and hand his invoice to your billing clerk. When
supplies run low, you do a warehouse inventory and order the parts
that you happen to be short on. With .NET, when you place the
order for the customer, the item is automatically deducted from
the stocking inventory, if the remaining stock is below your usual
stock, .NET can order more stock of the item for you. After the
items order is placed, the item is automatically added to the
customers billing account and can be billed automatically if your
accounting software is set up to do so. When applications talk to
applications, your life gets simpler.
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| More
information on .NET technologies can be found at:
http://www.microsoft.com/net/ |
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ATI RADEON 9700 Pro vs. NVIDIA Ti4600 |
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3D
Graphics Race Heats Up! |
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PART 1: ATI
9700 Pro Versus NVIDIA GeForce 4 Ti4600
The
ATI RADEON 9700 Pro (a.k.a.
R300) is the company’s next generation VPU (Visual
Processing Unit) just announced this month. This powerful
silicon boasts 107 million transistors and many new features
designed to compete head-to-head with the popular
NVIDIA GeForce 4 Ti4600 chips
on high performance video cards. Both technologies deliver
intense 3D gaming and exciting multimedia features. The
following chart will clearly illustrate the key technical
differences between them:
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Key Features:
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GeForce 4 Ti4600
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Radeon
9700 Pro |
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AGP
Bus (max)
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4x
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8x
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AGP
Bandwidth (max)
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1.0 GBs
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2.0 GBs
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Core Clock Speed
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300 MHz |
300-325 MHz |
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Memory Clock |
650 MHz (325 MHz DDR)
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620 Mhz (310 MHz DDR)
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Memory Type
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128 bit DDR
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256 bit DDR
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Max
Memory
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128 MB
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256 MB
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Memory Bandwidth
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10.4 GBs
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19.8 GBs
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Vertex Shader Engines
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2
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4
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Pixel
Pipelines
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4
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8
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Textures per Pass
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4
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16
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Transform Rate
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136 million triangles /sec
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325 million triangles /sec
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Pixel
Fill Rate
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1.2 Gigapixels /sec
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2.6 Gigapixels /sec
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Other Features:
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NVIDIA Lightspeed Memory
Architecture II |
DirectX 9.0 Support
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NVIDIA Accuview
Antialiasing |
SmoothVision 2.0
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NVIDIA nView display
technologies |
HYPERZ III Memory
Optimizations |
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High-quality HDTV/DVD
playback |
VIDEOSHADER -Video/DVD
Playback |
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NVIDIA Unified Driver
Architecture (UDA) |
TRUFORM 2.0 - Higher Order
Surface Processor |
The
ATI RADEON 9700 Pro clearly comes
out a winner in several key categories like Memory
Bandwidth, Pixel Fill Rate, and AGP 8x support. Still,
remember that 8x AGP (part of the AGP 3.0 spec) is a new
technology and is only available on a few motherboards so
far, but when used it can double the bandwidth between the
graphics card and the rest of system as compared to 4x AGP.
In addition, the ATI 9700 Pro has
Smooth Vision 2.0, a technology allows up to 6x Full Screen
Anti-Aliasing and up to 16X Anisotropic Filtering (FSAA
smoothes out the jagged edges on lines and objects created
by normal 3D rendering). The GF4 Ti4600 has 4x FSAA
capabilities (NVIDIA Accuview) and is also quite strong in
this area.
Both
chips also provide for high quality video and DVD playback,
TV-out and multi-monitor support options, and excellent 2D
performance. While the GeForce 4
Ti4600 is a very powerful graphics card with the
advantage of NVIDIA’s innovative engineering, the cutting
edge ATI 9700 Pro clearly
represents the next generation of 3D technology.
Our
own in-house tests of the Radeon 9700 and the Ti4600 Series
of video cards also
confirms
the current king of the hill in graphics technology is the
Radeon 9700. We tested both cards using 3DMark 2001SE and
came up with the following results:
Radeon
9700 Pro (ASI SKU# 17404)
Driver Version 61.43 (Shipping Driver) -
13972 Overall Benchmark Score
Driver Version 61.66 (Reference Driver) -
14074 Overall Benchmark Score
NVIDIA
Ti4600 (ASI SKU# 15286)
Driver Version 30.82 (WHQL Certified) -
11669 Overall Benchmark Score
Driver Version 40.41 (Reference Driver) -
12840 Overall Benchmark Score
Testing
Hardware
Motherboard - Intel
D850EMV2
CPU - Intel P4 2.8GHz. 533MHz. FSB
Memory - 512MB PC800-40 RDRAM
Part 2: Radeon
9700 Pro Versus the Radeon 8500
At the
same time ATI announced the 9700 they also announced the
Radeon 9000 (R250) which is a
revamped ATI 8500 (R200) core.
It is designed to be a
fully
DirectX 8.1-compatible, multi-monitor supporting mainstream
graphics card available to the end-user at a good price.
In order to achieve this lower price ATI has had to make
some small cutbacks in the chips core, but these do not
significantly impact overall performance. These changes
include a slimmed-down 3D pipeline and also reducing the
8500’s dual optimized vertex shaders to one, but this one
shader has been improved to version 1.1.
Overall 3D performance of ATI
Radeon 9000 is about 80-85% of the Radeon 8500.
Fortunately ATI has also added several improvements, such as
better multi-monitor support (by integrating a single TMDS
transmitter interface in addition to two 400MHz RAMDACs
instead of a single RAMDAC) and something called “Video
De-Blocking” in which the graphics chip takes over some of
the work of video de-blocking from the CPU while playing
video streams. Overall the Radeon
9000 should be an excellent value for the money as
compared with other high-end video cards. |
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See You Next Month! |
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