I'd be interested in these. Do you still have them?

Anyone using ebay who finds card where they won't offer a DOA should just let these be. It's sketchy as it is. I've been on both sides of the fence, I'd much prefer to do a face to face. I've picked up 4 5870's within an hour distance of me on craigslist. First, I know where the guy lives. IF something fishy happens, I can come back and either grief them to hell, or ask for some help in getting it RMA'd. Most people are much nicer when faced in person.

I would say I'm sorry, but I can't apologize for the transformer outside my house blowing TWICE in the last 24 hours. They finally put a new fancy one up! (It's made me a very unhappy person. Power went down about 10 minutes after I joined MF with full power.)

Hashrate is back over 1gh/s with room to spare!

Posting to note that I've brought 1gh/s on board, my username is the same on MF: Xurious. I'm barely hitting the 1gh/s at the moment, this damnable 95f weather is killing my rigs.


Indeed, most are not. I've just been used to working with BTCguild (Currently the backup). I hope MF is DDoS resilient, as that is one of the big reasons I had to find a new pool. Lost far too many shares in that debacle.

Connected to this pool this morning before I read all the info about it. Wanted to see the stability over 12 hours first, so I used 1/2 a 5870. I'll switch fully over now, it may not be completely free but I like the concept!

Have I missed something casually perusing these forums? Why must it be 120 blocks? That's a relatively long time.

What are you using to underclock it?

Like all other computer shops, this guy charges an outrageous price. His "new system special" is about twice the cost of the parts to do it. But hey... Suckers are born everyday, and since I give him props for taking bitcoins.

Vga switch box would work, as long as it provides a resistance. Pick any brand. I have a rosewill two port.. works fine.

Reduce ram clock to about 1/3 your core clock, the 300mhz is a reference everyone throws out. I've done this on all my cards, it doesn't effect the performance. Even if you have to run it a bit higher, say 400mhz, that should be more than plenty and it's saving you 5-700mh/s of memory clock that isn't getting used.

The 6xxx series work better with 256 work size.

Haven't read through the entire posting yet, but have you tried underclocking/volting your hypertransport? Slowing down the pci/e lanes? I mean... if your card is using 16 lanes, and you only "need" one lane, then couldn't you reduce the lane to 1/16 the original speed and still maintain overall bandwidth?

Use services.msc in windows to disable stuff your pc does not need to be running. Could shave cpu cycles allowing you to slow your cpu down even further.

Edit: I get the idea you are not running windows. So scratch that last line.

You CAN mix and match cards. I'm doing it right now with a 5870 and a 460. You just can't use the nvida card as a phsyx card for gaming while doing so.

I'm getting a bit over 1 btc a day with 2gh/s. Enough to buy me a new part nearly every other week

You could underclock the 2 extra cards you put in. Not the most efficient of ideas, but more streams running at a slightly lower speed is better than fewer running faster. Also this would generate less heat that you'd have to pump out.

http://www.hardocp.com/article/2011/07/13/bitcoin_mining_gpu_performance_comparison/3

"Sorted most expensive to least expensive, longer bars = better value"

Now I guess if they go by the prices you'd pay off ebay or amazon I could see this being true. If you go by reasonable prices then the story is far different.

If anyone wants to get their feet "wet" go buy a used 5770. Hands down, nothing comes close for the mh/s per dollar. It's easily 2-2.5mh/s per dollar. (Used ones go from $60 to 80, 90 for new and you can get 200mh/s out of them super easily.)

I'm not certain where they got their prices from, I hardly doubt the 6990x2 is the best performance for your dollar. They also didn't mention 5830/50's.

You need to look at this as a dollar per mh/s. For those 200 dollars that you could have spent on getting the 6990, you can pick up a 5870 and get another solid easy 350 mh/s. This more than makes up for what the 6990's could get.

I'm too lazy to dig up the thread, but this is apparently a driver bug. Just keep the affinity to 1 core. There is a work around here somewhere for it....

You need to turn fan speed to 90% at least. You need some chassis fans. A fan on the side cover of your pc. Or just leave a box fan next to it.

I'm really liking btcguild but man.... all these times I keep having to change servers is getting old. I know it's not your fault. Good luck on getting it all fixed and set up!

This looks nice! Works well so far too. I haven't found any problems.

To althon micro? Yea, they work california business hours. Their emails where ususally same day with me. I just make to reply INSTANTLY after they send me one.