Fall 2003 Video Card Roundup Part I - ATI's Radeon 9800 XT
by Anand Lal Shimpi & Derek Wilson on October 1, 2003 3:02 AM EST- Posted in
- GPUs
The Newcomers
As we briefly mentioned, there are three new products to talk about today – the Radeon 9800 XT, the Radeon 9600 XT and then NVIDIA’s NV38.
The XT line of Radeon 9x00 cards is specifically targeted at the very high end of the gaming market. With AMD and their Athlon 64 FX, Intel and the Pentium 4 Extreme Edition, it’s not too surprising to see even more companies going this direction. With an ultra-premium part like the Radeon 9800 XT the profit margins are high and more importantly, the PR opportunities are huge – claiming the title of world’s fastest desktop GPU never hurts.
The effort required to produce a part like the Radeon 9800 XT is much lower than a serious redesign. When making any kind of chip (CPU, GPU, chipset, etc…) the design team is usually given a cutoff point where they cannot make any more changes to the design, and that is the design that will go into production. However, it is very rare that manufacturers get things right on the first try. Process improvements and optimizing of critical paths within a microprocessor are both time intensive tasks that require a good deal of experience.
Once ATI’s engineers had more experience with the R350 core and more time with it they began to see where the limitations of the GPU’s clock speed existed; remember that your processor can only run as fast as its slowest speed path so it makes a great deal of sense to change the layout and optimize the use of transistors, etc… to speed up the slow paths within your GPU. This oversimplified process is what ATI and their foundry engineers have been working on and the results are encompassed in the R360 – the core of the Radeon 9800 XT.
The Radeon 9800 XT is able to run at a slightly higher core frequency of 412MHz, quite impressive for ATI’s 0.15-micron chip (yes, this is the same process that the original R300 was based on). Keep in mind that the Radeon 9800 Pro ran at 380MHz and you’ll see that this 8% increase in clock speed is beginning to reach the limits of what ATI can do at 0.15-micron.
The Radeon 9800 XT does receive a boost in memory speed as well, now boasting a 365MHz DDR memory clock (730MHz effective) – an increase of 7% over the original Radeon 9800 Pro and an increase of 4% over the 256MB 9800 Pro. ATI was much more proud of their core clock improvements as we will begin to crave faster GPU speeds once more shader intensive games come out.
The Radeon 9800 XT does have a thermal diode (mounted on-package but not on-die) that has a driver interface that will allow the card to automatically increase its core speed if the thermal conditions are suitable. The GPU will never drop below its advertised 412MHz clock speed, but it can reach speeds of up to 440MHz as far as we know. The important thing to note here is that ATI fully warrantees this overclocking support, an interesting move indeed. Obviously they only guarantee the overclock when it is performed automatically in the drivers, as they do not rate the chips for running at the overclocked speed in all conditions.
The OverDrive feature, as ATI likes to call it, will be enabled through the Catalyst 3.8 drivers and we’ll be sure to look into its functionality once the final drivers are made available.
The Radeon 9800 XT will be available in the next month or so and it will be sold in 256MB configurations at a price of $499 – most likely taking the place of the Radeon 9800 Pro 256MB.
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Anonymous User - Wednesday, October 1, 2003 - link
How come cards likes the new XT can only get 50fps en jediknight3 ( old Q3 engine ) and reach for the 215 for UT 2k3? ( witch have way better graphic )Anonymous User - Wednesday, October 1, 2003 - link
I really wonder what happened to Anandtech. I once liked and trusted their reviews so much that I did not read any other ones.Now I see the first review of the NV38 and do not see it benchmarked in any way that would interest me. No Tomb Raider: AOD, no Shadermark, no AA/AF, no image quality comparisons and no Half-Life 2 (okay, this might not be Anandtechs fault).
This means no DX9.0 title that is demanding when it comes to Pixel Shader 2.0 power (no, Aquamark isn't). So please not not bench a ton of CPU/Memory limited games even without AA/AF.
"The performance crown under Doom3 is still in NVIDIA’s camp apparently". Doom3 is mainly DirecX8. Period.
"ATI is still ahead in Half Life 2. The numbers we’ve seen indicate that in most tests ATI only holds single digit percentage leads (< 5%), although in some cases ATI manages to pull ahead by double digits." What does that mean? Is this only with the NV30 optimised (degraded IQ) code path. If so, too bad for them.
Finally what I liked to know is if NVidia required Anandtech to benchmark this way...
Anonymous User - Wednesday, October 1, 2003 - link
How can Anand use det. 52, It's well know to cheat with lower IQ in Aquamark etc!Anonymous User - Wednesday, October 1, 2003 - link
Are you really using:2.8GHz Intel Processor Prescott
Anonymous User - Wednesday, October 1, 2003 - link
It was great to see so many games represented, not the least of which is one of my favorites: Neverwinter Nights.One game that I would be thrilled to see is Star Trek Armada II. The game is a blast to play, and under situations with many ships (ESPECIALLY multiplayer) the game can slow to a crawl even on high-end systems. I would hazard to guess that this game is more CPU bound, but a graphics analysis wouldn't hurt anything.
Anonymous User - Wednesday, October 1, 2003 - link
I thought it was a little ridiculous that almost every benchmark had the stipulation that "AA didn't seem to be applied. We'll investigate later." or "Image Quality wasn't up to snuff. We'll investigate later." and yet you still included the results for the Nvidia cards.After the article from Lars Wienand from THG where he states that if the driver reduces image quality to gain Framerate they gray it out, I expect the same thing from Anandtech. Especially since the drivers you used are unreleased for public consumption and may never even reach the public.
At this point image quality is indeed king. Who wants to spend $500 on a video card that will not provide top notch image quality? I know I don't.
Anonymous User - Wednesday, October 1, 2003 - link
the only thing i would have like to have seen though, was an indication on the performance graphs as to whether the game being used was a dx8 game, or dx9 game...i think most of those games were dx8...but i cant be certain, so it would have been nice to have known for sure...
Anonymous User - Wednesday, October 1, 2003 - link
i cant wait for part 2 !:)
Anonymous User - Wednesday, October 1, 2003 - link
Would be Cool if Anandtech could start to use Shadermark 2.0 :)Anonymous User - Wednesday, October 1, 2003 - link
The sleepless are rewarded once more!