You guys are using stock voltage and overclocking video cards for mining?  While that card was at 80ºC at the core, the VRMs were at 110ºC, I'm almost sure. You MUST undervolt your gaming cards for mining: http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/ and look at VRM temperature with GPU-z. It's mandatory, not optional. You must run the fan at 70-85%. It must run at relatively high speed, even if the core says 50ºC. It's not optional either. These are also decent temperature settings: "temp-cutoff" : "75",
"temp-overheat" : "70",
"temp-target" : "65",
That low of a temp target is pretty unrealistic in the summer time for a lot of people. Plenty cards chugging along at 75c - 80c. With my new Tri-x 290's I've set the temp target at 78c. Fan runs around 60% at that target where it would ramp up to 90% if I had the target at 70c. This is for the top card. Yes, but those are settings for now, the Northern Hemisphere is in the winter. The point being: mine at the lowest possible temperature. Do not assume that, e.g. 78 ºC is safe for mining. It may be for some cards, not for others. One thing is having cards I own and know, other is saying it's okay for someone else's unknown card and environment. Then, those are temperatures for the core only, not elsewhere in the card. |
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105W on that sensor is fine. It's only the core, then you add 40 ~ 50W for the remaining of the card, then multiply by ~1.2 (depending on PSU efficiency) to get how much it pulls from the wall.
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How? We're curious now...  |
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It is. Undervolt the cards!
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Since the 290's cannot be undervolted afaik, you need at least a 850W for the base system and 2 cards, then a 1300W for the remaining 4.
I suggest a Corsair TX or a XFX Pro 850W and an EVGA Supernova 1300W.
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Good brand. Perhaps you could have bought a 850W or a bit above just in case you want to add 1 or 2 cards in the future, but they're more expensive anyway
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Ignore the 7950's, unless you're getting them for $250 or so. Pick 2 280x cards
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And: Do you know any other good threads / sites that cover OCing of gaming-cards for mining?
You should not OC cards in the first place. Typical overclock makes the card hash SLOWER. Either because it throttles, or because hashing speed is not directly related with clock speed. It's very very weird. The best is to set the ram to where it provides lowest latency (often 1500Mhz) and then raise the clock slowly from ~950 Mhz until the hash speed starts to fall. There's a limit, perhaps around 1020 Mhz. 1000 Mhz gives more hash than 1100 Mhz. Figure that limit and undervolt to lowest possible that holds that clock speed. Get the most out of it, with timings tuned. Please donate to the OP if you can https://litecointalk.org/index.php?topic=12369.0There are optimized .bin files out there, but I can't find the link atm. https://litecointalk.org/index.php?topic=6058.0Also take a look at this: https://raw.github.com/ckolivas/cgminer/v3.7.2/SCRYPT-README |
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Wipeout2097: Tha's exactly what I needed. Thanks so much. Now why does GPU-Z not show my VRM-Temps? Do I have to unlock / flash the card / Bios?
Some cards don't report. With those is basically mine and pray, blind. That's why serious undervolting (down to 1V ~ 1.05V) and high fan speed at all times is so important. Perhaps HwInfo64 report them, dunno. |
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That card isnt the best, but it can be profitable. I would check out http://www.coinwarz.com/cryptocurrency and look at the coins they have, and pick one. so far it looks like DOGE is doing really well, but im looking for other coins to mine as i type. always good to spread your investments. Tanks for reply. I'm mining doge with cudaminer now. cudaminer reports 585kh/s is this good? My card is REALLY being stressed now. 100% TDP. When mining pts it felt like the card was sleeping. But PTS mining is still more profitable imo + less power used  Yes, preserve the card. Stay away from doge and scrypt coins, unless the profit is really worth it. Try MemoryCoin and look at scrypt-jane coins. Follow this thread, of course: https://bitcointalk.org/index.php?topic=167229.0 |
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He went to jail because he laundered money, not because he dealt with BTC.
Nothing to see here...
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Send that card to RMA/warranty and hope for the best.
Then please, follow the advice on the previous post. It's not only a matter of preserving the hardware; that card could have set the house on fire.
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Besides: I just figured that Trixx allows overclocking for the 7950's Memory up to 1800MHz and GPU clock up to 1500MHz.. Maybe my card just died cause it was faulty / had components with a short lifetime right from the very beginning?
No, your brain was the faulty component... Kidding, man. |
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You guys are using stock voltage and overclocking video cards for mining? While that card was at 80ºC at the core, the VRMs were at 110ºC, I'm almost sure. You MUST undervolt your gaming cards for mining: http://www.techpowerup.com/forums/threads/vbe7-vbios-editor-for-radeon-hd-7000-series-cards.189089/ and look at VRM temperature with GPU-z. It's mandatory, not optional. You must run the fan at 70-85%. It must run at relatively high speed, even if the core says 50ºC. It's not optional either. These are also decent temperature settings: "temp-cutoff" : "75",
"temp-overheat" : "70",
"temp-target" : "65",
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What do you mean a "proper" 650W PSU. A Corsair VS650, at least?
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OP, do this...  |
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Don't let the fan run slowly, letting the VRMs and core reach high temperature (relatively speaking)
"gpu-fan" : "70-85,70-85",
"temp-cutoff" : "78",
"temp-overheat" : "72",
"temp-target" : "66",
Or the core clock is too high for the voltage. Lower the clock. Which clock do you run it at?
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Very good thread! Not entirely sure, that is TheStilt's domain. Memory? Memory controller? But you have Elpida, too. So it should work. Elpida is a memory manufacturer from Japan or Taiwan, not sure |
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