ATI Radeon HD 4890 vs. NVIDIA GeForce GTX 275
by Anand Lal Shimpi & Derek Wilson on April 2, 2009 12:00 AM EST- Posted in
- GPUs
The Cards and The Test
In the AMD department, we received two cards. One was an overclocked part from HIS and the other was a stock clocked part from ASUS. Guess which one AMD sent us for the review. No, it's no problem, we're used to it. This is what happens when we get cards from NVIDIA all the time. They argue and argue for the inclusion of overclocked numbers in GPU reviews when it's their GPU we're looking at. Of course when the tables are turned so are the opinions. We sincerely appreciate ASUS sending us this card and we used it for our tests in this article. The original intent of trying to get a hold of two cards was to run CrossFire numbers, but we only have one GTX 275 and we would prefer to wait until we can compare the two to get into that angle.
The ASUS card also includes a utility called Voltage Tweaker that allows gamers to increase some voltages on their hardware to help improve overclocking. We didn't have the chance to play with the feature ourselves, but more control is always a nice feature to have.
For the Radeon HD 4890 our hardware specs are pretty simple. Take a 4870 1GB and overclock it. Crank the core up 100 MHz to 850 MHz and the memory clock up 75 MHz to 975 MHz. That's the Radeon HD 4890 in a nutshell. However, to reach these clock levels, AMD revised the core by adding decoupling capacitors, new timing algorithms, and altered the ASIC power distribution for enhanced operation. These slight changes increased the transistor count from 956M to 959M. Otherwise, the core features/specifications (texture units, ROPs, z/stencil) remain the same as the HD4850/HD4870 series.
Most vendors will also be selling overclocked variants that run the core at 900 MHz. AMD would like to treat these overclocked parts like they are a separate entity altogether. But we will continue to treat these parts as enhancements of the stock version whether they come from NVIDIA or AMD. In our eyes, the difference between, say, an XFX GTX 275 and an XFX GTX 275 XXX is XFX's call; the latter is their part enhancing the stock version. We aren't going to look at the XFX 4890 and the XFX 4890 XXX any differently. In doing reviews of vendor's cards, we'll consider overclocked performance closely, but for a GPU launch, we will be focusing on the baseline version of the card.
On the NVIDIA side, we received a reference version of the GTX 275. It looks similar to the design of the other GT200 based hardware.
Under the hood here is the same setup as half of a GTX 295 but with higher clock speeds. That means that the GTX 275 has the memory amount and bandwidth of the GTX 260 (448-bit wide bus), but the shader count of the GTX 280 (240 SPs). On top of that, the GTX 275 posts clock speeds closer to the GTX 285 than the GTX 280. Core clock is up 31 MHz from a GTX 280 to 633 MHz, shader clock is up 108 MHz to 1404 MHz, and memory clock is also up 108 MHz to 2322. Which means that in shader limited cases we should see performance closer to the GTX 285 and in bandwicth limited cases we'll still be faster than the GTX 216 because of the clock speed boost across the board.
Rather than just an overclock of a pre-existing card, this is a blending of two configurations combined with an overclock from the two configurations from which it was born. And sure, it's also half a GTX 295, and that is convenient for NVIDIA. It's not just that it's different, it's that this setup should have a lot to offer especially in games that aren't bandwidth limited.
That wraps it up for the cards we're focusing on today. Here's our test system, which is the same as for our GTS 250 article except for the addition of a couple drivers.
The Test
| Test Setup | |
| CPU | Intel Core i7-965 3.2GHz |
| Motherboard | ASUS Rampage II Extreme X58 |
| Video Cards | ATI Radeon HD 4890 ATI Radeon HD 4870 1GB ATI Radeon HD 4870 512MB ATI Radeon HD 4850 NVIDIA GeForce GTX 285 NVIDIA GeForce GTX 280 NVIDIA GeForce GTX 275 NVIDIA GeForce GTX 260 core 216 |
| Video Drivers | Catalyst 8.12 hotfix, 9.4 Beta for HD 4890 ForceWare 185.65 |
| Hard Drive | Intel X25-M 80GB SSD |
| RAM | 6 x 1GB DDR3-1066 7-7-7-20 |
| Operating System | Windows Vista Ultimate 64-bit SP1 |
| PSU | PC Power & Cooling Turbo Cool 1200W |
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jeffrey - Thursday, April 2, 2009 - link
1) ATI driver - Was 8.12 really used? Why? 9.3 was released last month.2) Conclusion - The edge should have gone to the 4890 for being ahead of the 275 in most games at resolutions targeting the price point.
Gary Key - Thursday, April 2, 2009 - link
1. The 9.4 beta was used for the HD 4890 and the chart has been updated to reflect it. The 9.3 drivers are not any faster than the 8.12 HotFix for the other AMD cards in every test I have run but Crysis Warhead with a Core 2 Quad. A few improvements have been made for CF compatibility and video playback though.2. The conclusion has been updated to clarify our thoughts between the two cards.
can - Thursday, April 2, 2009 - link
An ATI gpu with and nvidia gpu doing physx? I'm curious to see results of this kind of arrangement. Not a dedicated PCI Physx card, but on a faster bus, with a more powerful processor, as a video card. I'm wondering about pitfalls and performance and the literal looks of the application.SiliconDoc - Monday, April 6, 2009 - link
Sorry bub, you're stuck with ati, and as far as curiosity for physx - uhh... don't worry, you're not missing much, anand only got addicted to it for a bit.If you want the driver hack for it, there's a thread at techpowerup.
Some genius figured something out on it- not sure which os.
Jamahl - Thursday, April 2, 2009 - link
The conclusion in this review is awful beyond anything I have read before.How can the reviewer say the 275 is winning this one when the benchmarks clearly show dominance for the 4890 at most resolutions?
Otherwise it was a good article but the conclusion leaves a sour taste in the mouth.
SiliconDoc - Monday, April 6, 2009 - link
He could say it because he said it for ati for 6 months when ati won the top resolution. So his brain is in a "fart mode" that lied for ati for so long, he said it this time for nvidia - either that or he realized if he didn't he would look like an exposed raging red rooster fanboy.Good thing the reds started screaming NOW, after loving it for 6 months when their card was on top using the false method - because anand came in and saved the day - and changed the conclusion - for ati.
LOL
When nvidia doesn't give them a card for review again, it will be "them towing the line of honesty" that causes, no doubt, right ?
BWAHAHAHAAAAAAA
( you all just tell yourselves that along with our dear leaders )
erikejw - Thursday, April 2, 2009 - link
"On the NVIDIA side, we received a reference version of the GTX 275."You wish.
"since there is no 275 ASIC, NV is telling OEMs that they can make it from either a 280 or 260 board. One costs much more, and one performs better, so guess what everyone is going to use?
That isn't necessarily bad, but how NV is seeding reviewers is. They are only going to be giving out a very special run of ONLY 280 based parts.
Quite special 280 based parts at that. Reviewers beware, what you are getting is not what you can buy."
http://www.theinquirer.net/inquirer/news/599/10515...">http://www.theinquirer.net/inquirer/new...ia-hoodw...
bill3 - Thursday, April 2, 2009 - link
A lot of people seem to be crying about lack of temp, power consumption, oc, and fan noise numbers..while I agree in a stand alone review these are glaring omissions, the fact is theres a dozen reviews around the web where you can get that info in triplicate. I would much rather have the insight on CUDA and PHysx!I mean, people act like the internet isnt free and we all arent a google search/mouse click away from that type of info! Geez.
That said, I suppose reviews must be treated as "stand alone", however artificial a construct it may be. However if theres anything thats easily forgivable to be left out it's simple data numbers that can be found at a thousand other places. Which is exactly what temp, oc, etc are. I already know those numbers from a ton of other reviews. These people whining in the comments act like Anand is the only hardware review site there is. I would think if anybody was truly interested in laying out 250 to purchase one of these theyd be looking at more than one review!
SkullOne - Thursday, April 2, 2009 - link
I second the question about why did you use Catalyst 8.12 Hotfix? Other sites are using what appears to be an Beta Catalyst 9.4 driver so is your listing of Catalyst 8.12 a misprint?Also why do you care if AMD sent you an overclocked version? The HD4890 is directly targeted at the overclocking enthusiasts which is a realm that AMD has ignored up until now while NV embraced it.
The HD4890 has already been taken to 1+GHz on it's GPU and up to 4.8GHz on it's memory on other sites. That by far makes it the better buy.
SkullOne - Thursday, April 2, 2009 - link
Forgot to mention that by having this extremely overclockable card AMD has opened up another entire SKU for themselves by selling "OC" cards with the 4890.