No change in fan speed suggests there's no CMOS POST happening.

Make sure you have your 4-pin connectors (or single 8-pin connector) in the Motherboard's CPU power plug.
Looks like this coming from power supply:

Plug like this on MoBo (bottom-right of image):


Reseat the RAM, then reseat the graphics cards. Try with only one graphics card in. Make sure the 6-pin PCI-e molex connectors from your power supply are connected to the graphics cards.

When you boot up, your CPU & gfx fan should rev up and be noticeably loud, then slow down to near-silent. Does this happen, or do the fans stay revved up?

Unless you're using your computer for other graphics-intensive stuff, def. consider doing what Immune posted, too. Lowering mem clock speed has no significant negative impact on hash rate and will lower your gpu temp and decrease power draw slightly which may solve the problem if it's the PSU overheating, too.

Oh. I wasn't aware that new work starts on a block whenever anyone finds a block on the network. That makes way more sense than how I was thinking about it. Thanks for the info. Maybe the OP's client doesn't support long-polling, then?

Perhaps the stale rate from Deepbit is so high because blocks are solved much quicker? 5% seems very high.

Price reduced. Product will be given out for free to "not you" after Saturday if not purchased. 

88-92c is adequate. It's possible (though unlikely) the card you're using kicks the itself off @ 100c for safety reasons -- that's usually considered when it becomes too hot for consumer electronics to operate, though many people run gfx cards up to 110c without problems.

Does the program you're using allow you to set (or at least monitor) the speed of your gfx card fan? Make sure it's at 100%. You could also try underclocking your mem clock speed to lower the temperature a few degrees.

I think you should explore other alternatives to the card shutting off than temperature. Perhaps the card is unstable at whatever clock speed it's at (though I'm assuming it's at default speeds) or the power supply is insufficient. PSUs output less watts the higher the temperature is which could explain the card shutting off (they're rated at "room temperature" - a variable dependent on the company rating it). It could also be from your PCI-E speed being set too high in the BIOS (very unlikely). It's usually untouched (universally default on modern boards @ 100 MHz), but some people bump it up a few MHz claiming it helps them achieve better gfx card OCs.

You've got some serious airflow problems if your card is overheating and it's the only one in the case.

Download & run MSI Afterburner (found here) to check temps first.

If it's around or above 100*c, open up your case -- I imagine you must have a LOT of dust & whatnot clogging your intake vents to clean out. If there's still a problem, try keeping one side of the case completely open and buy some more case fans to mount inside it.

"This problem is linked to a lack of stability in bitcoind. We recently upgraded to bitcoin 0.3.21, and it seems that this version is not stable. We'll wait a bit and if it crashes again we'll downgrade."
-Mark

My BTC transaction just prior to the crash went through now, too. Whew.

I'm getting right around that using poclbm for BTCMine, as well.

Edit: Of 1450 last shares on my two 5850s running on this comp @ ~350 MH/s each, I have 5 recorded stales. ~.34%

This now appears for me, too.

Hope my BTC isn't lost.

Ha. Our transactions are in the same block. Guess we just need to wait a bit longer, then.

I believe the popup is done through Javascript. Perhaps Java isn't correctly installed on his machine?

I'm getting no such error. Can you get to https://mtgox.com/users/addFunds ?

Vaguely related note -- is there a way to confirm I sent BTC to the right address? I sent 15 BTC an hour or so ago and have 21 confirmations, but my balance @ MTG is what it was before I sent the coins. 

I'm guessing there's no such refund for sending BTC to a nonexistant hash address?

1.168v

Some cards have trouble going from full load to zero load. Perhaps it's overly-aggressive in underclocking when it's done at full load, or could be related to the PSU -- I'm not sure. Does the same thing happen if you underclock your card and then go from full load to stop?

However, I don't think it's necessarily the 5850 model (brand may, however, be an issue) or Win7 since I'm running Win7 with 5850s and don't have this problem, though I did have this problem occasionally when I was running an overclocked 460, and I have no idea why (it had no stability problems outside of this). Wasn't just mining -- starting/stopping Furmark would do it on occasion, too.

@ Minerx, we're talking about 5850s, not 6950s.... 


I have 8 ASUS 5850 cards running and not a single one is unstable until it goes past 910MHz (a couple reach 940 MHz). They aren't over-volted and run under 60*C, much of that due to a smaller form factor and otherwise good thermal design -- there's virtually no risk of any dying due to OCing.

They also run 2x per board with just a 550w power supply. The systems draw around 480w total continuously at full load.

Way easier, cheaper, and efficient to run caseless. I put 2 small round felt adhesives  (~$3 for 50 @ Walmart) over the MoBo->Case holes then rested the MoBos on bobbins aligned with the adhesive circles. Have 4 mining rigs done up like this. Easiest installation ever. MoBo has power/reset buttons right on it, so no need to find something metal every time I want to reboot.

Very easy to take/push air from/to outside the building this way. Keeps my video cards under 60*C even on hot days.

bump