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GeForce GTX 460 SLI Performance vs. AMD GPUs

RavenXXX2 said:
I was just so flabbergasted that you are getting all excited over overclocked 460 SLI beating a stock 5870..
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I don't think people are arguing which beat which here. I think most people are just impressed with the minimum frame rate of the GTX460 SLI and those higher res, such as having playable frame rate of 26fps for Metro 2033 at 2560x1600. 5970 does indeed has higher average and max frame rate at those settings, but it's minimum frame rate dipped below 25fps (which is commonly agreed as the bare minimum playable frame rate) down to 22fps. But to be fair, the 5970 can be overclocked as well, and with that the minimum frame rate should easily reach over 25fps.
 
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jigger said:
If you clock the ATI cards to the same level, 270Mhz on the core and 400Mhz on the RAM they would be faster.
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135MHz on the core, and not much faster, or at least the overclock would provide as big a percentage performance increase as with the 460's
 
Marine-RX179 said:
I don't think people are arguing which beat which here. I think most people are just impressed with the minimum frame rate of the GTX460 SLI and those higher res, such as having playable frame rate of 26fps for Metro 2033 at 2560x1600. 5970 does indeed has higher average and max frame rate at those settings, but it's minimum frame rate dipped below 25fps (which is commonly agreed as the bare minimum playable frame rate) down to 22fps. But to be fair, the 5970 can be overclocked as well, and with that the minimum frame rate should easily reach over 25fps.
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Hardly surprising as you will not find a more Nvidia optimized game than metro 2033, the recommended cards by the publisher is a 470 and 480 lol, BC2 a more neutral game and shows the real performance difference.
 
RavenXXX2 said:
Hardly surprising as you will not find a more Nvidia optimized game than metro 2033, the recommended cards by the publisher is a 470 and 480 lol, BC2 a more neutral game and shows the real performance difference.
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I guess you do have a point there. But I really wish that they actually get some BFBC2 results for 5850 Crossfire for comparison with GTX460 SLI. At 2560x1600, the 5970 might benefit from the extra 1GB of RAM, so it might not be a good representation of what 5850 Crossfire's actual performance.
 
RavenXXX2 said:
5970 2GB will only ever use 1GB of ram, but it's a fact ATI can cram more in to vram than Nvidia can.
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But if you look at the BFBC2 results there and compare the minimum frame rates:
5850 1GB: 12fps
5870 1GB: 16fps
5970 2GB: 47fps

Even if Crossfire is scaling 100%, I can't see how by adding an extra 5850 1GB to a 5850 1GB can up the minimum frame rate from 12fps to 47fps (up by 300%). It just looks more like the the extra 1GB of RAM of the 5970 is what contribute the most in the extra frame rates.
 
Yeah but its true that the 5970 cards will ony utilize 1GB of vram, unless there is evidence otherwise I would say it is exceptional scaling.
 
Marine-RX179 said:
But if you look at the BFBC2 results there and compare the minimum frame rates:
5850 1GB: 12fps
5870 1GB: 16fps
5970 2GB: 47fps

Even if Crossfire is scaling 100%, I can't see how by adding an extra 5850 1GB to a 5850 1GB can up the minimum frame rate from 12fps to 47fps (up by 300%). It just looks more like the the extra 1GB of RAM of the 5970 is what contribute the most in the extra frame rates.
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Sorry to say that but you lack of technical knowledge. Radeon 5970 2GB will only use 1GB per GPU, it's a hardware specification and it can't be done in any other way.

FYI Radeon 5970 is dual 5870s on a single PCB with 5850s clocks. Meaning that it should perform in between a Crossfire 5850 setup and Crossfire 5870 (in 8x/8x mode, as it only uses a single PCI-E for comparison). It should never perform twice as good as Radeon 5870 unless the results are borked/inconsistent or there is another hardware limitation.

Regarding your previous post about overclocking of GeForce 460s that supposedly all do over 900MHz or even 950MHz or more with voltage tweak, as far as I have seen most people get them to 850MHz on core?
 
HW91 said:
135MHz on the core, and not much faster, or at least the overclock would provide as big a percentage performance increase as with the 460's
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But your not considering the shader speeds, and thats why the results will also be bogus. Hence my point.

You could take both cards to max OC and compare them sure, but this test is not a genuine comparison.
 
Mr Krugga said:
FYI Radeon 5970 is dual 5870s on a single PCB with 5850s clocks. Meaning that it should perform in between a Crossfire 5850 setup and Crossfire 5870 (in 8x/8x mode, as it only uses a single PCI-E for comparison). It should never perform twice as good as Radeon 5870 unless the results are borked/inconsistent or there is another hardware limitation.

Regarding your previous post about overclocking of GeForce 460s that supposedly all do over 900MHz or even 950MHz or more with voltage tweak, as far as I have seen most people get them to 850MHz on core?
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Em...I'm not sure if you read my post right, as my point was exactly saying that it's hard to make sense of the 5970 having 4 times the minimum frame rate of a single 5850, and the BFBC2 frame rates I posted was actually quoted from the website on the link at the first post of this thread. I was only suggesting about the RAM because the results itself is too surprising/unbelievable.doesn't seem to make sense, that a single 5870 is only delivering minimum frame rate of just 16fps, where as the 5970 is delivering minimum frame rate of 47fps. And yes I KNOW the 5970 are with two 5870 GPU downclocked to 5850 speed.

As for GTX460, most reviews managed to overclocked the it to 830~850MHz on stock voltage, and from what I recall, I saw one review for GTX460 with voltage tweaked to reach 900MHz, and another review reached 950MHz. As for asking "are all GTX460 with voltage tweak will all reach 900MHz+", that's pretty much like asking "will 5850 with voltage tweak will be guaranteed overclock higher than those without", and it all depends of if you receive a card with a good chip or poor chip. As for most people get them to 850MHz, are those on stock voltage or require increased voltage?
 
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