GM200/Titan X announced with slow DP

[Picao84]

Like I speculated in the old forum, Big Maxwell, unlike Big Kepler/Fermi, is not strong in DP: only 0,2 TFlops.
One more for the record, following my speculation that Maxwell would be most if not all done in 28nm, several months before the release of GM204. As usual, I was faced at the time with some fierce opposition to this idea, never mind how many arguments and facts I thrown at it.

On a side note, the keynote is very very interesting. Lots of information about Pascal and performance estimates: 10x faster than Maxwell!!

http://www.ustream.tv/channel/gpu-techno...rence-2015

You are spouting bullshit here, Picao84!

You cannot infer GM200's true FP64 capabilities from Titan X, since they are artificially limited to 1/32 of the GPU's true capabilities in Titan X, just like regular consumer geforces.

It does make you wonder precisely what the point of Titan is nowadays though, they used to limit Titan to 1/3 the true fp64 rate and tout the card as something a small/home developer would like since you could use it like a slower Quadro/Tesla or a geforce.  The 1/32 fp64 rate makes it no better than any other garden variety geforce for CUDA though.

I guess the true purpose of Titan nowadays is to separate fools from their money (just like Intels x99).

*sigh* No I'm not. Before lashing out at me go see the reviews with technical information on them like Anandtech. Even nVIDIA themselves said that for compute there is GK210. I wont quote now cause I'm on the mobile phone, but if you don't believe me go check for yourself.

Yes, I have read the technical information.  The 1/32 fp64 is an artificial limitation, imposed upon titan so as not to encroach upon Quadro's and Tesla's based upon the same chip that will have a 1/3 fp64 rate.

No it's not!!! Quote then where you read that bullshit!

Here is from Anandtech:

"For GM200 NVIDIA’s path of choice has been to divorce graphics from high performance FP64 compute. Big Kepler was a graphics powerhouse in its own right, but it also spent quite a bit of die area on FP64 CUDA cores and some other compute-centric functionality. This allowed NVIDIA to use a single GPU across the entire spectrum – GeForce, Quadro, and Tesla – but it also meant that GK110 was a bit jack-of-all-trades. Consequently when faced with another round of 28nm chips and intent on spending their Maxwell power savings on more graphics resources (ala GM204), NVIDIA built a big graphics GPU. Big Maxwell is not the successor to Big Kepler, but rather it’s a really (really) big version of GM204.

GM200 is 601mm2 of graphics, and this is what makes it remarkable. There are no special compute features here that only Tesla and Quadro users will tap into (save perhaps ECC), rather it really is GM204 with 50% more GPU. This means we’re looking at the same SMMs as on GM204, featuring 128 FP32 CUDA cores per SMM, a 512Kbit register file, and just 4 FP64 ALUs per SMM, leading to a puny native FP64 rate of just 1/32. As a result, all of that space in GK110 occupied by FP64 ALUs and other compute hardware – and NVIDIA won’t reveal quite how much space that was – has been reinvested in FP32 ALUs and other graphics-centric hardware."

Note that it says GM200 and not Titan

From Tech Report:

"The GM200—and by extension, the Titan X—differs from past full-sized Nvidia GPUs in one key respect, though. This chip is made almost purely for gaming and graphics; its support for double-precision floating-point math is severely limited. Double-precision calculations happen at only 1/32nd of the single-precision rate.

For gamers, that's welcome news. I'm happy to see Nvidia committing the resources to build a big chip whose primary mission in life is graphics, and this choice means the GM200 can pack in more resources to help pump out the eye candy."

How about you learn to read then?