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
#19, did you even read this review at all? You look more idiotic by the second; Anand DID INCLUDE NV38.And if you are honestly that whiny to suggest that you can't wait for Part 2 for a free service such as Anandtech...then just get a life.
And no, SM2.0 cannot single handedly predict future game titles, that's just ignorance on your part. If you knew anything about programming you'd know that there are so many different variables that affect a game that it would take multiple code testing programs (like SM2.0) to even get a relatively accurate picture of future game title performance. Unfortunately, no web site in the world is going to spend their whole day doing that crap, they wouldn’t be able to get other games benchmarked.
(Btw, if you mistyped your comment about NV38, since your next comment seemed to imply that AT is somehow biased because they got NV38 and no one else did, you are simply a paranoid dope with nothing better to do than bash a big web site. Christ, you don't even know how dumb you sound; just today I was told by an editor through pms that AT's 9800XT review was delayed because they received NV38 at the last minute. Yeah, that clearly shows that NVIDIA had planned all along to have this AT review by their biased leash.
Haha, I just noticed over at Beyond3D that you're Natoma, yes? Haha, no wonder, you're one of the least knowledgeable guys there. Lol
Anonymous User - Wednesday, October 1, 2003 - link
#19 cont.: Look what NVidia needs is not NV38 but NV40. And NV40 should better be better than R420 in ALL terms.And I'd love to see NVidia back on track.
Anonymous User - Wednesday, October 1, 2003 - link
Doom 3 is an OPENGL game, not DirectX. And Carmack himself said they had to write specific code paths for Nvidia (to use lower precision), so you can't really compare ATI and Nvidia in Doom 3 directly.Anonymous User - Wednesday, October 1, 2003 - link
Perhaps YOU are clueless. I don't need to wait for complete reviews on other sides. And yes, they might have had more time as they did not benchmark NV38. However that they did not get NV38 makes this review even more suspicious.AND: You should also want Shadermark 2.0 crap if you are interested in playing some games already on the horizon and most games that will be released over the next year. Some of these games may be fillrate intensive like Aquamark3 but they are not that Pixel Shader 2.0 intensive.
Anonymous User - Wednesday, October 1, 2003 - link
prescott..naa...but then again why not?Anonymous User - Wednesday, October 1, 2003 - link
#11 you're an idiot. What loser who wants to buy a 9800XT or NV38 wants to see Shadermark 2.0 crap? Jesus, I certainly don't, and I'm one of many people that wants to buy a high-end video card. Tomb Raider sure, but he included 15 total games you idiot. And if you actually READ the review, you would have noticed Anand say he will do IQ testing in Part 2 of this review.Jesus, are there really this many clueless Anandtech readers? lol
Anonymous User - Wednesday, October 1, 2003 - link
@ 15: I was once an NVidia stockholder and gladly sold them early. With Doom 3 being DirectX 8 i mean that it does not use much of the new Shader capabilities that DirectX 9.0 cards have.I saw that Anand uses AF/AA in some games. Too bad that the most demanding games Aquamark3 and Halo were not also benched this way...
Anonymous User - Wednesday, October 1, 2003 - link
Yes Anand really is using a 2.8GHz Prescott. =)#11 Doom3 is OpenGL. I dont know where you got this directx 8 business. Are you bashing AT because NVIDIA scored poorly, or because ATI scored well?
Kristopher
Anonymous User - Wednesday, October 1, 2003 - link
@ 12: Because Raven Software uses far more polygons and newer shader extensions in JK3. It is not really comparable to Quake 3.Anonymous User - Wednesday, October 1, 2003 - link
Concerning #11: I did not mean that all games are CPU limited. But Anandtech complained about not having enough time for AA/AF. So possibly they should have excluded games like FS 2004.