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 Post subject: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 10, 2012 1:57 am 
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This is the question, someone told.

I have no answer ;-) but here there's a somehow related rather interesting reading (just FYI).

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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 10, 2012 4:59 am 
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I don't have much to add other than it does appear that at least GK104 (GTX 680 silicon) is a step back for computation. Its FP64 processing rate is 1/24 FP32, as opposed to Fermi's rate of 1/8, and 1/4 for GCN (Radeon 7970). It's possible that a future GK110 chip changes this, though.


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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Sat May 12, 2012 5:54 am 
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However I don't agree even with the "graphics first" commandment/explanation/approach about which the article talk.

As a paradox, even leaving the computational trade-off aside, after two years, two generations and one die-shrink, a pair of GTX460 looks like still (relatively) competitive with what Nvidia (and the GPU market as a whole) has to offer in its upper side nowadays.

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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Sun May 13, 2012 2:05 am 
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Not starting a flamewar, but if you have to upgrade now AND want max folding power, your current choice isn't Nvidia any more. As Luca pointed out, this may change with the next gpu generation. But for the time being, the newest Keppler is way behind.


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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Mon May 14, 2012 4:14 am 
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I think there's no need for any flame, it's just a reflection on the state of things.

After some hype and great expectations, maybe Kepler achievements are questionable.
If we look at the reference GTX670 (sort of downclocked GTX680), graphics-wise it's about on par with the previous Fermi GTX580 within a smaller thermal envelope (and the oced GTX670s are in the GTX680 territory): but this is also roughly what a pair of old GTX460 actually can still offer (and do you remember the EVGA 2 Win?), which is even about competitive with Tahiti/Tahiti Pro.

Even if it's just an hint, it leaves (to me) more than a doubt about the effectiveness of the Nvidia development along last two years: I'm not so confident any (if any) GK110 can solve anything either for computational power (and the new Tesla 3000 8GB is just a GTX690 IIRC), or maybe even graphics-wise.

Strictly about folding, AFAIK probably Intel (cpu) folding under linux looks like the most efficient way, expecially for a dedicated rig.

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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Mon May 14, 2012 11:10 pm 
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quest_for_silence wrote:
Even if it's just an hint

Well, I would add just that I'm starting to slowly change my mind on Kepler, while receiving more and more hints, or even some sort-of "deja-vu" (OMG, so my memory isn't so good as I thought)... We'll see.

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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Wed May 16, 2012 6:47 am 
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Just for reference purposes: The Inquirer, less than two months ago.

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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 17, 2012 4:56 am 
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http://www.anandtech.com/show/5840/gtc- ... -tesla-k20

Let's wait and see, how they perform. And of course, for what price.


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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 17, 2012 9:07 am 
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I don't understand why it should be surprise that NVIDIA want to differentiate their HPC/GPGPU cards from their mainstream graphics cards. They have done this for a long time, as have their primary competitor, in certain ways at least. If AMD weren't flapping about trying to find The Rock Of Relevance in stormy waters they'd probably do the same thing.


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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 17, 2012 9:12 am 
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nutball wrote:
I don't understand why it should be surprise that NVIDIA want to differentiate their HPC/GPGPU cards from their mainstream graphics cards.

I mean it's not the point.

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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 17, 2012 9:36 am 
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quest_for_silence wrote:
I mean it's not the point.


Not the point of what? Folding is never going to be the top of the priority list for any of the IHVs.


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 Post subject: Re: Nvidia Kepler, a step back for GPU folding?
PostPosted: Thu May 17, 2012 11:22 pm 
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nutball wrote:
Not the point of what? Folding is never going to be the top of the priority list for any of the IHVs.

Actually we were not debating on any market segmentation, but just about current Kepler's technical achievements.
If these are due to a new market segmentation strategy, I think we'll see later this year (or in the 2013) with the Tesla K20 and with any "mainstream" GK110-based cards (if any).

At anyway, folding may never has been the top of the priority list for any of the IHVs (even if the point is the lack of computational power), but I mean it isn't enough to not point out that Nvidia has actually "stolen" PPDs right from our pocket.

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