Is my 7950 dying (hashrate fine, accept shares VERY low)

[billionaire]

I bought two 7950 Sapphire 3Ls at the beginning of April. I run them both at a modest overclock, which gets about 590 kh each, and temps have always been around 65C on one and about 55 on the other. The one at 65C is the card running good results as i type this, the one at 55C is poorly producing.

Anyways, i noticed earlier today in GUIminer that my hashes for one card were WAY lower than the other. (about 1/5 as many) So I closed and reopened GUIMiner. Same thing. I shut the PC down let it rest for a few minutes, and started again. A few minutes later the card in question has Accepted 34 shares, stales 4. The other card (which was started at the exact same time) has 193 accepts and 3 stales.

The poor results card is still getting the same 590k/h it always has. Is there anything I can do to try and fix things? What do you think is going on with the card?

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[Ryu.Hayabusa]

Try each card by itself, starting with the low hashrate one.  Leave it in the current PCI-E slot and see if it gets a low hash rate by itself.  If it still does, move it to the slot the normal hashrate card was in and try again.  If hashrate is still low, it could be that the card is going bad?  Not sure.  I would try stock clocks first and see if there's any improvement.

If it improves by itself in the same slot then its probably an I/O issue with the motherboard, I would try increasing voltages (small increments!) in the BIOS for North Bridge, I/O related chipsets, and PCI-E.  Depends on your board and chipset what you should adjust though.

If the card improves after moving it to the other slot, then it could be that slot it was in is having issues, try another if available.

Hope this helps.

[andrewsg]

Try each card by itself, starting with the low hashrate one.  Leave it in the current PCI-E slot and see if it gets a low hash rate by itself.  If it still does, move it to the slot the normal hashrate card was in and try again.  If hashrate is still low, it could be that the card is going bad?  Not sure.  I would try stock clocks first and see if there's any improvement.

If it improves by itself in the same slot then its probably an I/O issue with the motherboard, I would try increasing voltages (small increments!) in the BIOS for North Bridge, I/O related chipsets, and PCI-E.  Depends on your board and chipset what you should adjust though.

If the card improves after moving it to the other slot, then it could be that slot it was in is having issues, try another if available.

Hope this helps.

I think the OP mentioned that the hash rate is fine.

I notice something similar with the OP - even at the same hash rates I have a GPU solving more shares than the other one, I assume it has to do with the way the mining software allocates them across GPUs.

OP - try switching the cards between them in their slots - make GPU 0 - GPU 1, and the other way around. See if the difference persists.