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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Hauk - Thursday, April 2, 2009 - link
Congrats ATI, the 4890 is a strong performer! So much chatter about what constitutes rebadging; at the end of the day it's performance that matters. 4890 does a great job for the money.The GTX 275 performs well but lacks excitement IMO. Nothing surprising or exciting; we've already seen a 240 shader enabled gpu on a 260 style interface (x2). If anything, the 285 receives strong competition from both 4890 and 275. Makes little sense to remain at it's price point. It's price should be $300.
Times are tight. Cheers to competition...
slickr - Thursday, April 2, 2009 - link
I can't believe how biased anandtech has become.I've checked all other review sites and in all the GTX275 was winning by a pretty big margin, here it actually looses to the HD4890.
Now I'm not a fanboy for either, I've had 2 nvidia graphic cards and 2 ATI cards, the current one is ATI, but this bias thing can't go un-noticed.
Some investigators must be summoned to deal with anandtech, this has been going for quite a while now.
z3R0C00L - Friday, April 3, 2009 - link
I see the difference.. those "other reviews" used the Catalyst 9.3 drivers.Anandtech, HardOCP and Firingsquad used the new 9.4 Beta drivers.
No bias on Anandtech's part. Rather a bias from those other sites who used the new nVIDIA BETA driver but not the ATi one that has proper support for the 4890.
B3an - Thursday, April 2, 2009 - link
I dont normally take notice of comments like this on here, but it does seem a little like it. It's as if NV have pissed off Anandtech with there dirty tactics (understandable), and Anandtech are being a little bias because of this.JarredWalton - Thursday, April 2, 2009 - link
I've looked at three reviews (FiringSquad, THG, and HardOCP - also Xbitlabs, but they didn't have the GTX 275 in their results). I'm not quite sure what horribly biased and inaccurate results we're supposed to have, as most of the tests are quite similar to ours. Two sites - HardOCP and FiringSquad - essentially end up as a tie. THG favors the 275, at least at lower resolutions and without 4xAA, but then several of the games they test we didn't use, and vice versa. (The 4970 also beats the 275 there if you run 4xAA 2560x1600.)Obviously, we had a lengthy rant on CUDA and PhysX and discussed the usefulness of those features (conclusion: meh), but with all the marketing in that area it was something that was begging to be done. Pricing, availability, and drivers are still areas you need to look at, but it's really a very close race.
If you have reviews that show very different results than what I'm seeing, post the name of the site rather than making vague claims like, "I've checked all other review sites and in all the GTX275 was winning by a pretty big margin, here it actually looses to the HD4890."
SkullOne - Thursday, April 2, 2009 - link
That's different then what I've seen. I dunno what sites you visit but all of the ones I've been to show them just about neck and neck or the 4890 just edging out the 275.Personally I give the edge to the 4890 due to it's high overclockability.
SkullOne - Thursday, April 2, 2009 - link
That's different then what I've seen. I dunno what sites you visit but all of the ones I've been to show them just about neck and neck or the 4890 just edging out the 275.Personally I give the edge to the 4890 due to it's high overclockability.
Spoelie - Thursday, April 2, 2009 - link
p=2 As we can clearly see, in the cards we *r*estedp=11 particles are one of the most difficult things to do on the CPU *thanks*
Drivers? test table says 8.12 hotfix but we're at 9.3/9.4 now...
Yojimbo - Thursday, April 2, 2009 - link
First you say you aren't concerned about the 4890 being a rebadge because at the end of the day it's performance that matters, and then you said the GTX 275 lacks excitement because "we've already seen a 140 shader enabled gpu on a 260 style interface (x2)," whatever the significance of already seeing that is.Aren't these contradictory statements?
SiliconDoc - Thursday, April 23, 2009 - link
Of course it's contradictory, it's a red rooster statement. Then the 3m they use to just crank a few more mhz is the rework.. LOLPay homage to the red and hate green and spew accordingly with as many lies as possible or you won't fit in here - been like that for quite some time. Be smug and arrogant about it, too, and never amdit your massive errors - that's how to do it.
Make sure you whine about nvidia and say you hate them in as many ways as possible, as well - be absolutely insane mostly, that's what works - like screaming they can take down nvidia when the red rooster shop has been losing a billion a year on a billion in sales.
Be an opposite man.
Of course it's contradictory. Duhh.. they're insane man - they are GONERS.