Bitcoin Forum

Hey all, I was mining happily up until this last week when suddenly my rejected shares rate went up to 50% from 1%. I'm using a 7950 and 5770 on Phoenix Miner 2.0.0.

Was wondering if there was a reason for this. Also I'm mining for either BTCguild or BitcoinPool.

Have you tried silly things like a reboot?

Yes I did, I did a cold reboot too, not a simple restart, to refresh my IP.

I don't know then. I've heard of people getting the rare it goes all stay, reset everything and it's fine.

How are the temps on the GPUs? How long have you been mining for? Months and this just popped up? Have you tried something else like cgminer to rule out software issues?

You've ruled out some stuff:
Pool
IP, Computer stuff

Let's cross overheating and software off the list and see what's left.

Temps remain stable around 80C during operation (at 95% GPU load, aggression 5 for the 7950, and 1 for the 5770). I just bought the 7950 two weeks ago, however the failed shares show up equally in phoenix miner log between both the cards, so I don't think it's an issue with the hardware.

I also just loaded up GUIminer which runs on CGMiner I believe, and the issue is still present there.

Sorry then. It sounds like you know what you've kind of got going on. Only thing I could suggest would be still hardware.

Try pulling one card out and testing, and swapping cards. If it fixes the problem with one at a time, maybe it's a power supply not giving enough power, or good power. If it still presents the errors with only one card at a time... I don't have any more steps left. Have you upgraded the drivers during the period where all this went into question? Try rolling back if you installed new video drivers during that time.

Try to switch to another pool.
50btc.com's support helped me with settings, I have no rejects at all now.

Tried rolling back my drivers to the stable 13.1 release, that didn't work.

Also have tried running one card at a time, that didn't work either.

Anyone else have some ideas?

Now that's really weird. Not the drivers.

You did the new card by itself, same problem? You did the old card by itself, same problem?

Did you try a new pool? If you do that, you've ruled out everything haven't you?

Yeah, pretty much. Can you round up anyone else or escalate this to the support forum?

Delete the compiled library files under phoenix directory
Look at power cables going to GPU closely

I just deleted the whole directory and unzipped a new copy. That didn't make a difference.