Except that CUDA doesn't work with the new NVIDIA cards such as the B( and they only recently got OpenCL to work again) revisions of Titans 780's, and 780Ti's.
https://forums.macrumors.com/posts/18757149/
So what you get a machine that's better at current games, and horrible at OpenCL, while lagging farther and farther behind on RAM, CPU speeds, and newer instruction sets. Hardly the "fastest" GPU in a Mac Pro.
You seem to be having reading trouble or my posts aren't clear.
The "B" cards are 100% fully functional in 10.9.1 using a piece of latest Beta driver. Full CUDA, OpenCl, etc. Run 100% just like "A" cards.
Only one to not have CUDA is the 780Ti.
And where did "Horrible" at OpenCl come from? Maybe you are getting 680 confused with 780? They are similar looking until you notice that they aren't the same. Titan/780Ti combo get 3150 on OpenCL "Sala" Benchmark that D700 twins get 3400 on, so 8-9% behind. Guess that is "horrible" now.
"Fastest GPU" is exactly that, the GPU. Like it or nor, from the day the nMP came out it was running an older pair of GPUs which can be bested by things that go in PCIE slots like those in cMP. If OpenCl power is what is needed, Dual 7970s score over 4000 in Sala, and since that is more than 10% faster than 3400, by your standards that means the D700s are "horrible".
Did anyone actually read my post? I specifically said:
"No, I don't think for a second that this is the be-all, end-all test.
There are certainly PLENTY of tests where a nMP can beat mine."
So, you can put faster, better GPUs in a cMP than anything available for a nMP.
Getting out the tar & feathers because I point this out doesn't help, it just shows that some people are a little "sensitive".
Does nMP have a disk drive that is faster than anything I can put in cMP? Yes. (until a faster PCIE one comes out anyway)
Does nMP have a CPU that uses nifty new tech and can run FCP faster clock for clock than my 5680s? Absofreakinglutely !!
Does the nMP have better, faster RAM? Yep, and with it's 4 slots it can use as much as I can with 8.
So if I can readily admit that ALL of those things are better in nMP, why is saying cMP can have better GPUs so upsetting?
A guy starts a thread showing what a nMP D700 does in 3DMark.
I post that a cMP (via PCIE upgrade) can best that by 40%. What does 4 x "horrible" equal?
EDIT: And of course when you need REAL OpenCl performance it's best to stop monkeying around with the trashcan-with-a-fan and pop some serious cards in your cMP. By removing 2 HDs I was able to slide 3rd card in. (No REAL Pro uses internal storage anymore, or so I've been told)
Fired up Luxmark again.
Whoa !!!! 4500 is more than 3500 I think.
But that's only if you need real OpenCl horsepower. Keep in mind, cost still under $7,600.
If Dual GPU OpenCl is good, isn't Triple GPU OpenCl better?
(note to self, look up "order of magnitude")