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242
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Economy / Marketplace / Re: Will buy 1000W ATX PSU
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on: March 07, 2011, 11:43:12 PM
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12.5V at 20% bothers me :S My PSU (HX850) goes to MAX 12.2V (ie: 1.666667% more than 12V) while 12.5V is 4.1666667% which is 2.5X worse voltage stableness. That is quite bad for Graphic cards that are OCed "The KINGWIN Mach 1 ABT-1220MA1S power supply is easily a HardOCP Editor’s Choice Gold Award winner when looking at testing alone. The one caveat the buyer needs to be aware of is that their shiny new ~$330 PSU is only backed with a 1 year warranty. We would feel much more comfortable suggesting your buy this unit if it carried a 3 year warranty at the least." - [H]ardocp Note that the Xion does not have modular cables. |
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247
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Bitcoin / Pools / Re: New pool with proportional and pay-per-share reward distribution, ~40 Gh/s
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on: March 05, 2011, 04:58:17 AM
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I am using my GTX 480 for mining and it's crunching at about 106 Mhash/s. Is it better for me to be on Pay-Per-Share or Proportional payout?
I would sell it and replace it with an ATI. You are using roughly ~500w @ full load. With 80% PSU efficiency you're pulling 600w from the wall. 600w/hour * 24 hours/day * 30 days = 432 Kwh and at $0.10/Kwh, you would be paying $43.20 a month in electricity and pull in about 57.5 BTC per month or $52.33 a month at current difficulty and current Mt.Gox market price, netting $9.13/mo. I don't like using ATI cards, their driver support for Linux is not very good. Well I can't change your mind, but here's some food for thought. You could probably get 5.5x your current Mhash on 2x5870s with at most 50w increase at stock clocks. This would most likely be within your current PSUs power envelope; so you would not need to replace the PSU. Answering your original question, I would do proportional. |
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248
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Bitcoin / Pools / Re: New pool with proportional and pay-per-share reward distribution, ~40 Gh/s
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on: March 05, 2011, 04:35:22 AM
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I am using my GTX 480 for mining and it's crunching at about 106 Mhash/s. Is it better for me to be on Pay-Per-Share or Proportional payout?
I would sell it and replace it with an ATI. You are using roughly ~500w @ full load. With 80% PSU efficiency you're pulling 600w from the wall. 600w/hour * 24 hours/day * 30 days = 432 Kwh and at $0.10/Kwh, you would be paying $43.20 a month in electricity and pull in about 57.5 BTC per month or $52.33 a month at current difficulty and current Mt.Gox market price, netting $9.13/mo. |
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251
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Bitcoin / Mining / Re: Software to optimize gpu performance?
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on: March 01, 2011, 11:26:32 PM
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On the Windows box, I use Sapphire TRIXX...controls the fan well, doesn't require special unlocking techniques, but has a PITA registration requirement to download. Slight overclock gets me ~295Mh/sec on a single HD6950 1GB, 850/1280, -v -w 128.
That's weird. On my 6950 I only get 150 Mh with -v -w 128, but 310 Mh with -w 64 -f 1 and no -v. You can save some power by lowering the memory speed. I'm running memory at 155 Mhz with no loss in Mh. Perhaps you have one of the new 6950s with 1GB RAM, or you haven't unlocked the shaders? This is on a 1GB model (used in 32bit machine, needed memory space for main memory vs GPU memory and don't use above 1920x1200). With -w 64, I get ~250Mh/sec. With -v -w 64, I get ~295Mh/sec, although the deviation seems to be less and peaks higher than -v -w 128, so I think I'll stick with that now. Also how are you running memory so low? Do you mean 1155? Or is it really that low? (Edit: Seems to be 1155. At 1100 I start losing ~5Mh/sec. At 1150 I get the same as 1280, so it's sticking there.) There is very little performance increase in overclocking memory to be worth it imo. |
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253
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Bitcoin / Mining software (miners) / Re: python OpenCL bitcoin miner
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on: February 19, 2011, 01:41:01 PM
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Hey m0mchill, was -v command changed in this update from 0205? My .bat files that worked for 0205 does not work for 0215. It will only work if I take out the -v from the .bat file, but i lose about 30K/hash per card.
How not to work? I use -v and it works. Give your file here will help you:) This will not launch, unless i take out the --v. Works fine for version 0205. start /DC:\bitcoin\poclbm poclbm.exe --user=xxxxx --pass=xxxxx --device=0 --f=5 --w=128 --v |
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254
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Bitcoin / Mining software (miners) / Re: python OpenCL bitcoin miner
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on: February 19, 2011, 12:16:56 PM
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Hey m0mchill, was -v command changed in this update from 0205? My .bat files that worked for 0205 does not work for 0215. It will only work if I take out the -v from the .bat file, but i lose about 30K/hash per card.
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257
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Other / CPU/GPU Bitcoin mining hardware / Re: 5970 Cooling Solutions
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on: February 01, 2011, 11:33:20 PM
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It's one of those 4U cases marketed by Compucase and Codegen. All my gpu's are housed in those, but with air cooling. Nice cases, sturdy and simple and that top bar is very useful. 70-100£ each in UK Mine is all cluttered in a HAF 932  w/ 6 hard drives too + 2 dvd drives. |
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258
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Other / CPU/GPU Bitcoin mining hardware / Re: 5970 Cooling Solutions
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on: February 01, 2011, 08:48:59 PM
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Ah I see, I guess I'll have to try to find another 5970 then. I have a 1250w PSU only, so I think 3 5970s is about as much as it can handle without wiring a secondary PSU in. I'll go look at watercooling stuff now and see if I want to drop that much.
1250 is going to be just barely enough for 3 if you are overvolting/clocking. I know. I'm probably going to underclock my CPU. I'm thinking the 3x5970s are going to be pushing close to 1100w or 92A on my 12V rail. |
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259
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Other / CPU/GPU Bitcoin mining hardware / Re: 5970 Cooling Solutions
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on: February 01, 2011, 07:17:41 PM
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That's an interesting way to mount a hard drive  . Both of my 4u rackmount cases came with hard drive cages on a crossbar like that, I didn't come up with it. I had to rip out all the drive bays to fit in the water cooling equipment, so that's the only place left. Ah I see, I guess I'll have to try to find another 5970 then. I have a 1250w PSU only, so I think 3 5970s is about as much as it can handle without wiring a secondary PSU in. I'll go look at watercooling stuff now and see if I want to drop that much. |
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