GeForce 780s have got quite affordable while Titans are not available or available at close to launch price, which is an epic rip-off compared to a complete rip-off at launch. Can I pair my Titan with a GeForce 780? If so, will my Titan disable shaders to match 780? I know that it shouldn't matter if both were clocked the same but there are already overclocked 780 and my titan doesn't OC well, so 780 would almost surely be able to clock higher. If you had a Titan and a 780 both clocked to offer identical performance, would a hetero pair offer as good performance as a homo pair?
Titan + 780 in SLI
- Thread starter Lepton87
- Start date
Termie
Diamond Member
It sucks that NVidia is so strict with SLI. Can't even pair two cards with the same GPU and number of active shaders if they happen to have different names. It's ridiculous. Why are they so picky with this? Quality assurance?
Why are they so picky? For AT forum drama obviously. Different VRAM, different shaders, different FP32 DP.
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They are little more different than that. Titan does have double precision, 780's don't. I'm not even sure they have the same shader count either.
I wanted to avoid going through the hassle of selling such a rare card as Titan. It's going to be hard to fetch a fair price for my Titan over here, it's virtually non-existent on the used card market. I couldn't find any used Titan for sale for 4 months now. I didn't check often though just a little bit more often than once a month.
Of course they don't. It's stated in the OP even. Differing shader count is not a technical problem, AMD shows it can be done without issue, I had 6990 paired with 2x6950 and it worked as it should. DP is irrelevant for SLI, SLI is just for games and DP is not used in games. Besides, it's disabled by default.
We have to remember that SLI and Crossfire are not the same thing. Just because Crossfire can do something doesn't mean SLI is capable of the same thing.
I meant more in general, like how a 680 can't SLI with a 770. I suppose you have a point about the DP, but even then, why can't a Titan SLI with a Titan Black? Or a 780 with a 780 Ti?
DP is not a problem, it's disabled by default, SLI could just disable itself if DP was turned on. Those are artificial driver restrictions.
That's just silly then. If AMD can make the only requirement for crossfire be that the cards have the same chip, why can't Nvidia do that with SLI? Is it some kind of consistency thing, or just business? I'm genuinely curious.
DarkKnightDude
Senior member
- Mar 10, 2011
- 981
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Probably the way the architecture is done I'd imagine. And drivers too for different card clocks.
I believe it's all down to software. AMD/ATI has had numerous architectures that worked with mismatched cards while NV is known for blocking things in software like PsyX when the gaming card isn't NV and we all know that there's not any technical reason for that, only pure greed and spite on NVidias side.
While I agree it would not be beneath nVidia to block SLI on different cards for financial gains, we don't know that this is the reason. SLI just might not be compatible with mismatched GPU's. Just because Crossfire is doesn't mean SLI is.
i have titan black and the old titan i wish there is a way to sli them but so far could'nt find anything
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I'm sure that the technology could be revised to make it work, so Nvidia is most likely intentionally not making it possible.
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