GTX 660 Ti

[marchermitte]

Hello there. Probably ONCE AGAIN another post about GPU model... I'm now using two GTX 480 but I was looking at the GTX 660 Ti, 3 Go ram and It seems to be really interesting as for Cuda cores and memory / Price ratio. What do you think? Any advice before I go ahead and buy them?

Thank you!

[matej]

I hope you know that a 680 is slower than a 580 (and probably even than a 480), so a 660 will give you considerably less performance than what you have now.

6xx Kepler technology is different than Fermi and you cant compare number of cores 1:1

[marchermitte]

I've seen a list with cores number (at adobe I think) and the 660 Ti had more than 900 cores per unity instead of 480 for the GTX 480, that's why I was considering changing my dual 480, I would give me about 4x the power. But because I'm not 100% sure (as this is Keppler architecture and not Fermi anymore) I prefer to ask here, I would use them for Octane mainly.

[matej]

that's why I was considering changing my dual 480, I would give me about 4x the power.

No it wouldn't. Kepler & Fermi cores are not the same thing. In fact a 660 is probably twice slower than 480.

A 680 is 10% - 20% slower in Octane than 580, even if it has 3x more cores.

[marchermitte]

Ok, thank you for precising things for me! Then, I'll save some money then. What (appart my 480 gtx) would you advuce then for a dual GPU setting? Is my setting the best possible configuration at the moment?

[matej]

What (appart my 480 gtx) would you advuce then for a dual GPU setting? Is my setting the best possible configuration at the moment?

A 2x580 would be similar, a 2x680 would be slower but also consumes less electricity. Then there is 2x590, which is essentially 4x580.

If your 480 setup works ok for you, then I don't see much reason to change it, cause you wont gain much, if anything. Unless you go with two 590 / 690

[marchermitte]

Ok, great. Saving some money then...

thank you!