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Thread: Choosing the right hardware for long term crunching - Return of experience. |
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Thread Status: Active Total posts in this thread: 23
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kateiacy
Veteran Cruncher USA Joined: Jan 23, 2010 Post Count: 1027 Status: Offline Project Badges: 
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4. on the video card, for now I would get the 7770. There is a rebate on them I think, at least for powercolor in the US so they are about $100-110. The only thing that would change that is if you want to rack up some serious points during the current HCC-GPU project. In that case, I don't know if there is a difference in the number of stream processors between the 7750 and 7770. If not, with a good m/b and good PSU, you should be able to oc the 7750 to 1100ghz. No guarantees and it depends on the rest of the system and how clean your power source is so I also recommend a UPS, but from what I've read here, all of the name brand cards seem to overclock quite well Below are some specifications on the 7750 vs the 7770. There is a difference in number of stream processors as well as clock speed. AMD Radeon™ HD 7750 Feature Summary Up to 900MHz Engine Clock Up to 2GB GDDR5 Memory 1125MHz Memory Clock (4.5 Gbps GDDR5) 72GB/s memory bandwidth (maximum) 819 GFLOPS Single Precision compute power GCN Architecture 8 Compute Units (512 Stream Processors) AMD Radeon™ HD 7770 GHz Edition Feature Summary 1000MHz Engine Clock Up to 2GB GDDR5 Memory 1125MHz Memory Clock (4.5 Gbps GDDR5) 72GB/s memory bandwidth (maximum) 1.28 TFLOPS Single Precision compute power GCN Architecture 10 Compute Units (640 Stream Processors) The 7750 is the clear winner in power consumption. It does not require a 75W PCIe power connector as the 7770 does, and it can do with a 100W less power supply. Here's some more power consumption information on both cards: http://www.tomshardware.com/reviews/radeon-hd-7770-7750-benchmark,3135-14.html I have a 7750 and am very pleased with it. I'm running 3 HCC1 WUs on it at a time, and that's producing nearly 200,000 WCG ppd. It could do more, but I'm giving it only 2 CPU cores because I'm running other sciences on the other 2 CPU cores.  |
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GeraldRube
Master Cruncher United States Joined: Nov 20, 2004 Post Count: 2153 Status: Offline Project Badges:
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Other reports suggest that the upcoming GeForce Titan will also not be called the GeForce GTX 780, nor will it take a GTX 600 series name. It will simply be called the GeForce Titan, likely inspired by the by the Cray Titan supercomputer, which houses nearly 19 thousand Nvidia Tesla K20X cards.-- http://www.tomshardware.com/news/GeForce-Titan-GK110-GTX690,20797.html
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
May I ask how efficient your UPS is? I have always thought of them being similar to a Bronze PSU but for the life of me I don't know why. Long time ago I checked in and posted about it. All attached devices off, and the suckers were still eating 20 W/H. Unplugged all devices, and still 20 W/H, and this is with the power switch of the UPS off. They felt luke warm, which is when I started to unplug them from the wall-socket when away. Oddly, when plugging in the laptop, without battery in it, it was eating 85W/H when crunching full out on 2 cores. When plugged directly into the wallsocket it also takes 85W/H... what in the world is this? And this is kinky... a LED light bar of 1 meter takes 2.4 watts when on and 3 watts when off. Maybe the kilowatt meter is broken [And this is made in Germany], but still, a lukewarm UPS is a lukewarm UPS, when powered down. Bronze... maybe Brass rated. Well, bit the bullet today and took the UPSes out, thanks to much stabilized power from the supplier. Net, since they were really eating 12 Watts each in their standby process [trickle load] and aging, 2 of them in the house, that's 24 Watts hour, 365 days for 210Kw annual, a nice cut on the premium priced green power bill. |
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