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[kitguru] Nvidia: ‘Pascal’ architecture’s NVLink to enable 8-way multi-GPU capability - Page 6

post #51 of 80
Quote:
Originally Posted by 2002dunx View Post

Quote:
Originally Posted by 47 Knucklehead View Post

And Electricians getting paid lots of money so they can run TWO 15-20 Amp circuits to your computer room just to power it. A 2000 watt power supply is worthless unless your HOUSE has the capability to provide it at the wall ... and right now, you can't with a single standard breaker.

Something the UK got right !

3 KW at any normal socket..... 240V at upto 13 A - As my three systems will confirm....

dunx

houses here are hardwired with 220V 80A mains, split through 5 * 20A minor breakers.

not quite sure why they over did the minor breakers though, five 20A doesn't add up to 80A.
post #52 of 80
So lets see from what we normally see on SLI scaling on games:

1 GPU 100% scaling
2 GPU 75% scaling
3 GPU 50% scaling
4 GPU 25% scaling

Now with 8 GPU's:

5 GPU 12.5% scaling
6 GPU 6.25% scaling
7 GPU 3.125% scaling
8 GPU 1.5625% scaling

Sad thing is, I bet you they'll be dozens of people on this forum who will buy 7-8 Titan GPUs with <1 FPS gain just to show off and think they're cool.
post #53 of 80
Quote:
Originally Posted by Seyumi View Post

So lets see from what we normally see on SLI scaling on games:

1 GPU 100% scaling
2 GPU 75% scaling
3 GPU 50% scaling
4 GPU 25% scaling

Now with 8 GPU's:

5 GPU 12.5% scaling
6 GPU 6.25% scaling
7 GPU 3.125% scaling
8 GPU 1.5625% scaling

Sad thing is, I bet you they'll be dozens of people on this forum who will buy 7-8 Titan GPUs with <1 FPS gain just to show off and think they're cool.

it is cool, that is to say they're mining with their GPUs, or at least doing F@H.
post #54 of 80
Quote:
Originally Posted by epic1337 View Post

it is cool, that is to say they're mining with their GPUs, or at least doing F@H.

Unsure how well GPUs scale on mining/folding but I would assume that just making a complete 2nd system so 2 systems w/ 4 GPUs would be more beneficial both on cost & compute power?
post #55 of 80
How are they getting NVLink into motherboards ?
post #56 of 80
Quote:
Originally Posted by Seyumi View Post

Quote:
Originally Posted by epic1337 View Post

it is cool, that is to say they're mining with their GPUs, or at least doing F@H.

Unsure how well GPUs scale on mining/folding but I would assume that just making a complete 2nd system so 2 systems w/ 4 GPUs would be more beneficial both on cost & compute power?

nope, they go the cheapest route of sempron/celeron and bank in tons of PCI-E risers to slot in 7GPUs in their boards.
the cost cutting done can account to halving the entire setup's cost, doing two rigs would then triple the entire cost.
post #57 of 80
Quote:
Originally Posted by Seyumi View Post

So lets see from what we normally see on SLI scaling on games:

1 GPU 100% scaling
2 GPU 75% scaling
3 GPU 50% scaling
4 GPU 25% scaling

Now with 8 GPU's:

5 GPU 12.5% scaling
6 GPU 6.25% scaling
7 GPU 3.125% scaling
8 GPU 1.5625% scaling

Sad thing is, I bet you they'll be dozens of people on this forum who will buy 7-8 Titan GPUs with <1 FPS gain just to show off and think they're cool.

Well for one, scaling is way better than that nowadays. Something like 100%, 95%, 85%, 70% etc. etc.

Pretty sure these are for professional use like for movie CGI rendering and such.
post #58 of 80
Quote:
Originally Posted by DNMock View Post

Well for one, scaling is way better than that nowadays. Something like 100%, 95%, 85%, 70% etc. etc.

Pretty sure these are for professional use like for movie CGI rendering and such.

Indeed, I'd find it hard to believe this would ever come down the line to enthusiasts.
 
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post #59 of 80
First, you need a system with NVlink.

Since that's not coming to the consumer level, unless you're buying hugely expensive servers you'll never see it. NVlink is a mezzanine card that snaps onto the motherboard and bypasses the PCIe bus entirely. In fact IBM is the only company that's confirmed to be putting the NVlink ports into their motherboards.

So comparisons with your PC at home and SLI scaling or talking about PCIe slots is just hilariously silly. It only serves to show that you know nothing of NVlink and how it works, or what it's for. I can assure you no one is going to buy an NVlink equipped IBM server blade to play games on. These things are for high end business and scientific purposes, not gaming. It's for people more concerned about genome mapping or accurately modeling a hurricane to predict it's path than they are frame rates in some insignificant game.
post #60 of 80
Quote:
Originally Posted by Seyumi View Post

So lets see from what we normally see on SLI scaling on games:
1 GPU 100% scaling
2 GPU 75% scaling
3 GPU 50% scaling
4 GPU 25% scaling
Now with 8 GPU's:
5 GPU 12.5% scaling
6 GPU 6.25% scaling
7 GPU 3.125% scaling
8 GPU 1.5625% scaling
Sad thing is, I bet you they'll be dozens of people on this forum who will buy 7-8 Titan GPUs with <1 FPS gain just to show off and think they're cool.

True, scaling is now a problem but why, what is the reason? The reason is in the way how CPU and GPUs operate together. They operate in a very old fashioned way in which single core handles all GPUs in a single thread. These creates bottleneck but modern CPUs are multicore and multithreaded. There is thus potential to eliminate this by allocating different cores and threads for GPUs. That is exactly what is done in the soon to be coming DirectX 12. No problems with multiple GPUs anymore and huge performance gains.
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