[quotemsg=11036070,0,117741]tomfreak, two good 460s are somewhat less than a single 670 (VRAM limits not
withstanding), while two 560s will be similar since they're just oc'd 460s and
most of them had slower clocks than the best 460s. Two 560Tis can be usefully
better, matching a 670, or even matching a 680 if oc'd, but again VRAM capacity
may be an issue, though for all these older cards there were 2GB versions
available (but often with slower clocks; I have two oc'd 2GB 460s @ 800MHz
which run quite well). My gaming PC still has two 900MHz 1GB 560TIs which are
quicker than a 670 at stock, quicker than a 680 oc'd, at least when the 1GB limit
is not an issue. They certainly cope with Crysis2 at high detail well enough.
However, comparing to these newer 600/700 cards, the only older cards that
do still perform well by comparison (by that I mean the potential gain from SLI)
are the 570/580, again assuming VRAM capacity is not a factor, though the
3GB 580 definitely shines here. Indeed, two 580s SLI are almost identical in
performance to a single 780 for 3DMark11, eg. see:
http://www.tweaktown.com/reviews/5516/nvidia-geforce-gtx-770-2gb-video-card-review/index4.html
Here are my 3DMark11 results for two 797MHz 1.5GB 580s:
http://www.3dmark.com/3dm11/6683648
http://www.3dmark.com/3dm11/6683683
If you want lots more 460/560 data, see my site:
http://www.sgidepot.co.uk/sgi.html#PC
Ian.
PS. I don't include the 470/480 because they run too hot for my liking
and thus I wouldn't use either in SLI.
[/quotemsg]
[quotemsg=11036266,0,134065][quotemsg=11035919,0,117741]
Chris, what is it about the GTX 580 that makes it so slow for the CUDA Fluidmark
test, given it does so well for the other CUDA tests, especially iRay and Blender?
Btw, I don't suppose you could include 580 SLI results for the game tests?

Or do you have just the one 580?
My only gripe with the 760 is the misuse of a model number which allows one to
infer it should be quicker than older cards with 'lesser' names (660, etc.) when
infact it's often slower. I really wish NVIDIA would stop releasing products that
exhibit such enormous performance overlap. Given the evolutionary nature of
GPUs, and the time that has passed since the 600s launched, one might
reasonably expect a 760 to beat the 670 too, but it never does. To me, the
price drop is the only thing it has going for it. The endless meddling with shader
numbers, clocks, bus width, etc., creates an utter muddle of performance
response depending on the game. One really has to judge based on the
individual game rather than any general product description or spec summary.
I just hope Skyrim players with 660s don't upgrade on the assumption newer
model names mean better performance, but I expect some will.
Ian.
[/quotemsg]
I need to take a closer look at what Fluidmark is doing (Igor did all of the compute numbers), but that's a good question.
For multiples, yeah, only the one here.
The naming does make it difficult for enthusiasts to keep things straight. Both companies are guilty of it, and we've written entire stories complaining about it in the past, particularly on the mobile side. Unfortunately, there isn't enough outcry when stories like that go live to encourage change. Both companies point to each other, and nothing happens.[/quotemsg]
[quotemsg=11036070,0,117741]Two 560Tis can be usefully
better, matching a 670, or even matching a 680 if oc'd,[/quotemsg]
Does that sound right to you Chris?