Is this a corporation or is this done as a personal endeavor?  If you're doing this personally or as the same corporation that has already defaulted on its numerous and sizable loans, "Investors" should understand that, were this ever to see attorneys, they would receive any payouts (if any) _after_ your existing debts are settled.

Yeah.  I will try but given 47 or 48 cards work at sub 300 Mhz and one card dies instantly at clocks it ran fine before I doubt it is memclock is too low.

Haven't change memclock to see if that help/hurts I doubt it will make a difference but will look into it.

temps were mid 60C.  Linux has no way to see VRM temps but based on Windows experience of similar clocks that likely puts VRMs in the mid 80C range.

I have three non-reference 5870s that I absolutely hate.  They are a dual-fan Gigabyte design (http://www.gigabyte.us/products/product-page.aspx?pid=3430#ov)

I cannot keep them cool.  They are well spaced, and each have a delta fan blowing down on them.  Cgminer tries to keep them at 75C.  One runs the fan at 0%, one at 67% and the other one can't keep up at 85% (at stock clocks).  I have tried reapplying thermal paste, etc.  

The heatsink and fan assembly are attached to the card by four screws surrounding the GPU.  Can I get aftermarket cooling solutions?  I would love to get a "reference" type cooler.

Is there a standard mounting system?  Or am I left in the dust because my card is non-reference?

Thoughts?

Dan

  

On one of my rigs I kept noticing the same GPU (#4 grr) going DEAD.  I lowered the clock, dead, lowered clock, dead. Finally put it at only 750 Mhz it was fine for a couple days and then I noticed it dead again.

I verified it now is no longer stable @ even 750.   Three "dead"s in 24 hours.  I dropped it to 725 (stock) and it has been stable for almost a day now (will update post for longer periods of testing).  So far just that one core on one rig (1 of 48 gpus) dislikes even moderate overclock.  The other GPU on the same card is fine @ 800 MHz.  At higher overclocks the "bad core" dies almost instantly.  Those two facts and a 1200W single rail PSU design make me think it isn't a power issue.

This is a very old card (over a year old need to lookup sales date).  It was one of the first 5970s I bought, and it is what convinced me to replace all my other GPUs with 5970s to consolidate my growing farm.  It has never been overvolted but last summer it did run "hot" for about a month before I bought a mini-split system to supplement the house main AC.  It has run overclocked but nothing crazy.  I ran it (guestimates) 835 early on.  I dropped all the clocks to 820 and then 800 once I got up to 6 rigs because micro managing them became a hassle.   I can't try overvolting at this point (which can "restore" performance on circuits suffer electromigration) because it is in a Linux rig.

Other than 3 fan failures (and me dropping a motherboard down the stairs) this is the first casualty of mining I have had.   As our GPUs get older I wonder if anyone else has noticed something similar.

No, but I don't have the trouble that most people seem to with keeping their cards mining.  If I was losing mining time every day (or every month) due to overclocking, or had to spend more than 10 minutes on it in the life of a rig, I would consider it a loss.
We did some math in the IRC channel..  every 1 Mhash you squeeze out of your GPU is a whopping $1.25 PER YEAR.  (at current diff and btc price).  Not really worth putting much time into.

I have sent Cyper a PM that I have looked in to the profitability for my regions power costs & it is just prohibitive to mine here atm, I don't mind running it for a small loss but this would be much more than I could justify so very regrettably I have had to cancel my planned purchase, I have expressed my sincere apologies to Cyper for not having researched this properly before saying I would like to go ahead & he has every right to be annoyed at me for the extra work I've given him - I've offered him a small gift as a show of good will & hope that as he was in no rush that he can find someone better informed than I was to complete the sale  

Edit: seems like the calculator that I used had incorrect power costs for my region, now re-checking the feasibility against an actual electricity bill - Cyper is being fantastic re this & I really hope that I can still go ahead with it once I've re-worked the calcs for everything

Thanks so much guys. The wire trick worked. Awesome..

A single GPU unit doesn't make a lot of sense anymore.

Not a huge deal, but something I have noticed is if I make config changes through gpumon, then hit Shift-R to restart the processes... randomly it does a reboot instead (I hit shift-r, it stops the processes and says "the system is going down for reboot now" during that time).  it comes back up with the new config and it works fine... Any ideas?

I have tried ATT, which does work, but only on 2 of my 4 GPUs.
I have never heard of barelyclocked, but look forward to giving it a shot; I will gladly send you a couple BTC if this works.

My friend ChriX_G has a problem with his ASRock A75 Extreme6 mobo. The top pcie 1x slot does not want to work. Trying to plug a HD6970 through a cablesarus 1x to 16x with molex adapter. I have tested the adapter on one of my rigs and it does work. Has anyone had experience with this? Do you know if something on the board has to be switched off for it to work? The three slots on the MoBo are populated with 3 HD7970's if that helps. Chrix_G would have posted but he is still in the newb section.

Thanks all!

Well the problem one I have only whines intermittently when there is no load. If I load it up with a pair of 6990s or play a game the whine goes away, so I had assumed it was the fan whining at low rpm.