I'd take it if I were you the only reason I even offered that much is I have an empty board waiting for cards, and new cards are selling out like hotcakes, lol

cablesaurus is the only place that sells them otherwise you can make it from a regular extender by cutting a couple wires off with an exacto-knife and soldering a molex connection on the end. Search for the how to in the forums if you want to try it

Depends on the 7950 I just bought some HIS 7950's they used almost 300 watts at stock. The only solution was flashing the bios. Five 7950's will almost surely need at least one/maybe two powered pcie risers. I have one motherboard which won't even reliably initialize 3 7970's without it

I could do $200 worth of btc for the 4 5770's with escrow.

You must have one of the 7950's that defaults to 1.25v. Yea you can probably just undervolt with trix but a better solution is a 7970 bios. I have the HIS IceQ 7950 I used the bios from the HIS IceQ x2 7970. I assume you probably can use any reference 7970 bios if yours is a reference 7950 otherwise you probably need to stick with the same brand if its a non-reference. Power usage is around 170w now per card, instead of 250w.

I'm having issues with my 7950 as well. If its like mine it will not overclock unless you raise the powertune or board limit. If you do it runs extremely hot at 1.25v. It almost seems as this was intentional to make the 7970 alot better than this one. I have tried the gigabyte 7970 bios on mine and it has helped slighty

I must be blind then if it is there because I did read the readme before I posted. So I still don't know

is there an api call that resets stats/shares? same thing as pushing "d" than "z". If not can you add one?

coinotron is still solving 90% of the blocks if they are on a block for several hours don't expect a confirm until they do

Is anyone getting decent performance from the ppc pool and if so how? I only get about half the ppc I should and my hashrate stays about half while the pool hashrate goes insanely higher. Miners constantly have fans spinning up and down load going to 0% and back to full load

you need stratum support now for his trc pool only on port 3335 so you may need to update to the latest cgminer

So what you really mean is primeAsic now has the same amount of proof that Avalon does, lol

You will have a hard time finding 7970's new under $400 these days. That being said I still think $300 is a good deal for a used one,  granted receipt can be provided for warranty purposes. I've paid 300 for the ones I've bought off craigslist as well. If you get alot closer to that number I would be interested

Does anyone have any clue whats going on with my cgminer? I don't have this problem on any other pool as far as I can tell and I've only had the problem since he added merge mining. I have to reboot all my systems now about twice a day. This is what I'm noticing in the cgminer window, may not be exact going by memory. I have cgminer 2.11.2.

GPU0 has been idle for 60 seconds declaring sick
thread 1 and 2 no longer exist
restarting thread 1 and 2

which it does on some gpu's every 15min-1hr or so until eventually it does this

thread 1 and 2 no longer exist
Error -6 Creating Command Queue
Failed to init thread 1

Back to my original post, bad vrm's. I know thats not what you want to hear but you can get away with a failing voltage regulation system because of the much lower frequency in 2d mode and much more headroom on your voltage. When its failing the ripple is so bad (at stock 3d clocks) that the card will crash instantly like its overclocked way too much. Try it on just core 1 and just on core 2. If it doesn't mine just one core at a time, either ebay it or maybe sell it to AndrewK here on the forums.

Hey I never said it was perfect or even that it was ideal. But it is something you can copy and paste and will get the job done. If somebody would make a better script to just copy and paste and go, I'm all for it. But it is alot easier than making your own script for newbs.

you think an ebay account in good standing is worth over $10,000? yeah right! I was scammed out of $250 bucks on a over 500 100% positive account

I believe it has to do with an increased resistance from the additional cable length. Basically with 4 cards you are close to the max 12v that can be pulled through the motherboard through the pci slots. When adding those pci-e extenders you go over the limit. So splicing in a molex into the wires that carry 12v on the ribbon cable should work

some people also say increasing a pci latency setting in bios helps but I've never done it

Well the way they usually go is they stop being stable at 1gh+ and you have to lower it to 950 then it will be stable a week or two more. You might be able to lower it then to 850-900 for a couple weeks. Then they die.

Don't buy used 5830's!

With stratum and 10ghash I would probably be right below 5gb after 24/7 mining for a month. Stratum seems to drop bandwith usage about 60%

I don't blame you I'm heavily armed and have the perimeter surrounded by cameras. With an email alert the instant the cameras on the back of the house sense motion. Some $10 motion detector alarms (hopefully it will scare them, lol). I also have a pitbull, it will make some noise too (which actually don't make good guard dogs but they don't know that)

But who am I kidding my miners are almost a huge box of fans. What would they know to do with it?