Since I can't run 4 cards in 1200W...
This is incorrect, considering the excellent PSUs you mentioned. One can run 5 cards on such PSU, 4 on 1050W and 3 on 850W, if the videocards have undervolted bios to 1.05V. You need 20A per card on the 12V line. |
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1000W is fine IF
a) The PSU isn't obviously crap or misleading advertising. It should provide 80+A on a 12V single-rail. Perhaps Corsair or Seasonic
b) you undervolt ALL the cards previously, tweak them one by one, and NEVER mine or otherwise use them at full speed with stock voltage.
With the above, even 850W is theoretically enough, however it's irresponsible to recommend such.
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Mine are VTX3D (crap brand, I guess). I was lucky though: cheap, hash well, voltage regs supported and trouble free so far.
To figure out the voltage regulators, perhaps you have to remove the cooler, I dunno. You can register at that forum and ask...
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Bump! I'm now using a Sempron 190 dual-core instead of the FX-6100. We shall see in a few days but I suspect we have a winner  |
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XFX is usually a terrible videocard brand for mining
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Oh, and watch out for beggars. Lazy unemployed people will surround you for donation
 Don't take your neocon/redneck ideology there |
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Yes, using drones is cowardice, Obomba is an imbecile and the U.S. is what's mentioned here and more.
Still, the question remains. How do you stop Islamic Jihad, supremacism and all that comes with Islam?
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200 watts for baseline system parts? lol
My celeron G540, msi z77a-g45, 4gb ram, hard drive, and usb keyboard + mouse uses about 25 watts at the wall. No mining machine will use 200 watts at idle baseline with no GPU, unless you have like 20 fans, 8 core cpu, 32gb ram, and 8 hard drives, and even then, thats maybe 100-150 watts.
I actually don't contest his 200w figure for baseline as safety precaution. One may be interested in CPU coin mining too, or make genuine mistakes like not undervolting cards I have been down this road. Read carefully and do NOT discount my input. Sorry for being unclear. I do not discount anyone's input and will test ALL suggestions as far as I'm able to in this thread, in a week or so. However I'm counter-arguing while I'm able to post. Merry Christmas everyone, and thanks. |
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I don't want to distract from the OP's suggestion regarding transactions, however he picked someone else's work in progress from github at whatever random occasion he chose and claims that Bitcoin people don't know how to code? I see.
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PSU 150$ for 4x 280x ? please tell me where? for 280x x4 u need atleast 1200 WATT with other parts..
No, you do not. You need 900W to 1KW for 4 undervolted 4x 280x if you KNOW PSU's. It's just that nobody really does. A basic 650W Corsair VS can handle a 7970, a 6950 and a 7870. Is this "shoehorning" recommended for the average gamer/user/miner? Of course not! |
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abducts cows...
I suspect that cow abduction in the U.S. have to do with post-nuclear test mitigation. The military steal and dissect the cows to test the presence and measure radioactive elements that accumulate in the internal organs Any source? Would be an interesting read. I can't provide one. I swear I saw this theory in a TV program a looooong time ago, after the fall of the Soviet Union |
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Gigabyte Mobo's tend to have issues with RAM. Before you do anything extreme. Update the Bios to the latest version and make sure the RAM is stable at factory specs. If it is, then you can start to overclock them. It could also be a faulty stick or socket, just to name a few possible issues.
The bios is updated to the latest version and so is in the Asrock motherboard (there I also used experimental bios and downgrades) and except for the Gpus (for obvious hash and efficiency reasons) I don't want to use out-of-spec settings. That's precisely the problem: it doesn't work at stock. Then it doesn't work underclocked, with more voltage and with both. On the CPU, HT, NB, PCi-e PLL and whatever more that I can't remember. It doesn't work with ram underclocked, overvolted and with 11-11-11-36 timings, either the Gskill ripjaws dual channel or the Kingston Value ram single. Whatever combination of settings at the bios that I had peace of mind to try, "Auto" or manual tweak does not solve the problem. Any combination of parts (and I have redundant everything, except the CPU as one can see in the OP), does not solve the lockup. At this stage, I'm not even sure if some settings make the rig hold on longer than others... I have however 2 hints of instability: the gpu-z readings on the 7870 show spikes of temperature on the vrm's. Being at 37ºC and then spike to 74ºC. That's twice and can be reading error. Also there is an "Aux" reading on the Asrock mb, measured by speedfan. There is no such issue on the Gigabyte but on the Asrock it was 125ºC ! |
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I can't get around random lockups and freezes.
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- I ended up modding the BIOS of the 3 videocards, however the rig locks up even if the GPU cores are down at 500 Mhz. from this i understand its not random freezes but happen only when videocards start working meaning bad oc or not enough power remove all cards and test them one by one, if you can get max hash rate from them separately meaning they don't have enough power or if you have another power supply try connecting 6950+7870 to other power supply (at least 600w) and 7970+system to your 850w 7970~350w 6950~300w 7870~250w system~200w = 1100w This post makes me think a bit more, however the 6950 was mining for 2 months 24/7 on an Intel / Asus desktop machine and I did test each card separately. Both the Gigabyte and Asrock boards lockup with that (or any other )card mining. I also said in the OP: ... I used one GPU at a time. I switched slots. Regarding power, I tested the power usage of each card at the "wall" with a power meter. I don't quite remember the values, but the 7870 at 900Mhz undervolted to 1v, uses a bit above 100w, far far from the 250w you mention. I remember however the power draw measured by Gpu-Z from the VRMs onboard and it pulled ~5A at 12V, while the 7970 undervolted to 1.03V pulled ~12.5A. That would mean 60w on the 7870 and 150w for the 7970. |
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bitpop every one has its own opinion. Your views might be different from mine but in reality it’s all about time we are only predictors but for reality we need to wait and watch. Obviously someone will make profit on someone’s loss. Really I don’t mind about what you think after all everyone has freedom to think.
True a market is only when your profit is someone's losses. Coin mining isn't zero sum, it's a personal printing press. Some of us mine coins for fun, some cash as a hedge, and for ideological reasons. For example, you can read whatever you want on the media regarding the lazy PIIGS, Euro collapse, bailouts, etc... however this situation is the result of moves to defend the petrodollar. |
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I personally suggest to stay away from AMD based platform. That's what I've learned at my own expense. Use therefore an Intel based and a CPU with integrated video like a suitable Pentium G if the motherboard supports (even if I don't have such solution yet). A motherboard with a molex or PCI-e power connector for the PCI-e bus is also important to have.
As a solid recommendation (not anedoctal), a PSU from Corsair or made by Seasonic. All PSUs with single-rail 12v capability. If you don't want to "shoehorn" or otherwise be concerned with power issues, a PSU that at minimum provides 250W + 200W per ATI 280x card. You should undervolt the cards, but for 3 cards: 850W, 4 cards 1000+W, 5 cards: 1200W, etc... You also need 20A base + 20A per card on the 12V rail. If a particular PSU claims to provide enough power but does not come with the equivalent # of PCI-e power connectors, choose a different one. There are molex -> PCI-e power adapters, however they are not recommended for the newbie build (neither by experienced people) and can be a sign of misleading specs.
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Indeed. Furthermore, pulling a bit of money and new cryptocoins out of thin air is fun, but a worrying trend for long term. This has opened a Pandora Box.
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disable catalyst control center and install MSI afterburner instead. CCC causes many headaches and has been known to cause the type of problems you are talking about.
If that works 13E5sY63tZutcgPtZbPdppZoTfgt2N2YnT
I've tested CCC, MSI afterburner, Sapphire Trixx, Atitray and none of such software installed. Thanks. |
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Actually, I have had situations where a usb device can indeed lock up the whole machine, on both linux and windows... I'd be leaning towards that. If you have a gaming wireless adapter (i.e. receive wireless and convert to wired) or a wireless repeater with wired ports on it, you might try one of those to rule out the USB adapters.
I see. That's news for me. I will try without using USB, with an ide/sata HD and the ethernet port. |
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