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exterem folding- 48 bulldozers against 16 sandy bridges - Page 3

Poll Results: what will have the best possable performance for a pure folding server?

 
  • 69% (49)
    for a folding server, four 12 core AMD Opterons have the best possable performance
  • 30% (22)
    for a folding server, two 8 core Intel Xeons have the best possable performance
71 Total Votes  
post #21 of 145
Just want to point out that you are going in a good direction, but NEVER compare different CPUs cores vs cores or clock vs clock. The G34 AMDs have more actual cores, but that doesn't make them faster.


Also to reply to your first of three posts, NO. adding GPUs to the 4p rig WILL NOT HELP. It takes power from the CPUs to run GPUs, unless they are running advanced methods (the GPU) which take less CPU power, but still, the PPD from the GPUs wont actually help since you are getting less PPD from the CPUs.

I folded with a i7 870, which got me 25K ppd, folding with my 470 which got around 15K, but when it folded, I only got between 9K and 12K, so in the end the increase was slight, but power usage was three times more than CPU only. NOT worth it. I assume this would be similar with even more powerful CPUs. Basically the way things are now, its better to get more powerful CPUs than powerful GPUs since it will be cheaper to run, as well as get you more PPD.
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post #22 of 145
Quote:
Originally Posted by jrl1357 View Post

But wouldnt gpus still help?

When you start looking at 4x GPUs especially in the price point of the GTX 590s your talking about the money would be much better to spend on an upgraded CPU setup or an additional CPU setup. When folding big adv and the bonus points kick in its hard for GPUs to even compete with CPUs $$ for $$ and Im not even considering power consumption and heat output.

GTX 590s from a quick search make ~26,000 PPD. They are going to be hard to find but well assume a price of $600.00+ youll also need a power supply to handle them and a quick search shows they can pull ~500W each so youll need 2000+ watts of PSU which is not cheap at all.

26,000 * 4 = 104,000 PPD for $2400.00+


For about the same price you can buy a 4P board with 2 6274s and pull down well over 200,000 PPD closer to 300,000 with the a good WU. Also the power draw is going to be 1/3 if not 1/4 of what the GPUs draw.

As someone else said take a look at the thread below, prices and PPD are listed.
http://www.overclock.net/t/1212613/guide-building-a-2p-4p-from-start-to-finish-along-with-ppd-benchmarks-gallery
Edited by silvrr - 3/14/12 at 9:19am
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post #23 of 145
Look at a G34 quad socket setup, or a SR2 setup. Why get the SR-x when you can barely overclock them past stock speeds. No unlocked Xeon CPUs.
post #24 of 145
SR-2 actually overclocks nicely if you can get both CPU to play nice at the same time. With Turbo enabled, I can do 3.6Ghz/4GHz on dual X5650.

Overclocking multi-CPU is usually trickier than a bowl of jello because not all CPU are created equal. AFAIK no AMD board offer easy overclocking like EVGA does for Intel Xeon 1366

The information about multi CPU vs multi GPU were very useful. Looks like I may not get 580's for my new dual Xeon rig. I may instead put the money toward quad AMD rig.
    
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post #25 of 145
Thread Starter 
4 bulldozers it is! No 590s. Sigh. I really wish this were my my rig, but its a friends. If i ever get te money.... I wonder if piledriver will support four way 16core? Theyd need a new chipset thou, i heard the reason 4 way 12 core was the max was cause the chip didnt have the bandwidth. Any way, 48 cores should get him some great scores!
post #26 of 145
Quote:
Originally Posted by jrl1357 View Post

4 bulldozers it is! No 590s. Sigh. I really wish this were my my rig, but its a friends. If i ever get te money.... I wonder if piledriver will support four way 16core? Theyd need a new chipset thou, i heard the reason 4 way 12 core was the max was cause the chip didnt have the bandwidth. Any way, 48 cores should get him some great scores!

So..you put in a poll that you aren't going to follow?
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post #27 of 145
Thread Starter 
The poll was to get a good idea of how intel vs amd compaire and to corect anything we were going to mess up- and it worked, i learned cpu>gpu. Also it was to get a sense of how fan boyish this site can be- alot, as it turns out, i contected both amd and intel, intel told me to buy an octo socket board and amd they were sure of there opteron. It shows intel knows there overpriced and knows two sbes will under perform the opterons. Also this was a poll, the end choice has to take in cost and similure. Amd was cheaper, and probably better. Bottem line.
post #28 of 145
Quote:
Originally Posted by jrl1357 View Post

The poll was to get a good idea of how intel vs amd compaire and to corect anything we were going to mess up- and it worked, i learned cpu>gpu. Also it was to get a sense of how fan boyish this site can be- alot, as it turns out, i contected both amd and intel, intel told me to buy an octo socket board and amd they were sure of there opteron. It shows intel knows there overpriced and knows two sbes will under perform the opterons. Also this was a poll, the end choice has to take in cost and similure. Amd was cheaper, and probably better. Bottem line.

I wouldn't say it's fanboyism. Intel out performs AMD in damn near everything so (and I stated this in my first post) that was my reason for choosing it and I'd presume many others' as well. Also Intel's HT is better than AMD's shhtuff
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post #29 of 145
Thread Starter 
I know intels better clock for clock and core for core, but in this case the cores arnt even close.
post #30 of 145
Well, you're talking 48 BD cores vs 16 Intel cores with HT. If we assume each HT thread is worth half a core, that's 48 vs 24 cores worth (yes, you'll end up with 32 if you run SMP, but it'll get the same work done as 24 real cores if my assumption is at all accurate). Even the clock speed and IPC advantages the Intel setup would have won't equal the sheer amount of cores the AMD offering has. Yes, they're slower and less efficient cores, but you're getting LOTS of them.
Why not build 2 rigs with half the budget each? Then you can report on which one actually pushes out the best PPD?
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