I was paid up. Thanks.

wow as soon as I try to sell some BTC to this site, it goes down after confirming my deposit, but before payment. . .

eligius is not working for me currently either

One of the best forum responses I have ever read.

For some reason, I lose a lot of stability when I try to downclock the memory; or the downclocking doesn't work at all.

I've had a lot of luck increasing my hash rate by just increasing the gpu-engine config for each of my gpus.

Thanks, the problem was, in fact, that the gpus were not clocking 1125. They are now, and I'm getting between 1.95 gh/s to 2 gh/s for the rig. Now, time to build two more of these rigs.

What are some of the less damaging/risky changes I could make to the config to bring it up to 650 mhash/s?

Bitcoin qt is a wallet and you don't need to have one set up to mine. There are a number of other clients or instant wallets you could use to store your mining profits.

I changed the program I am running from guiminer to cgminer and increased my hashrate by 10 mhash/s per card that way.

Is there anything I can do to increase my hash rate at this point? Or is this rig just going to be stuck at this rate, 20% below target?

Here are my cgminer settings which I copied from the forum:

"intensity" : "9",
"gpu-engine" : "0-1125",
"gpu-fan" : "0-85",
"temp-cutoff" : "90",
"temp-overheat" : "85",
"temp-target" : "75",
"auto-gpu" : true,
"auto-fan" : true,
"expiry" : "120",
"gpu-dyninterval" : "7",
"gpu-platform" : "0",
"gpu-threads" : "2",
"log" : "5",
"queue" : "1",
"retry-pause" : "5",
"scan-time" : "60",
"temp-hysteresis" : "3",
"shares" : "0",



EDIT: Now getting 600-650 mhash/s per card. I'm also not going to have physical access to the mining rigs more than a couple times a week, so stability is very important.

Thanks. Seems like a good idea to get less ram and a cheaper HD to get a better PSU.

Planning on not using risers, just placing the rigs on racks.

Thanks Kev. Good luck to you as well. The profitability for gpu mining isn't that high right now, so we're betting on bitcoins becoming worth more in relation to USD.

Thanks, I'll go for that gpu instead.

I am thinking about building 2 or 3 of the following rigs. Advice and feedback appreciated.

Motherboard http://www.newegg.ca/Product/Product.aspx?Item=N82E16813157295 $160
Processor http://www.newegg.ca/Product/Product.aspx?Item=N82E16819116409 $50
Memory http://www.newegg.ca/Product/Product.aspx?Item=N82E16820104262 $80
Hard Drive http://www.newegg.ca/Product/Product.aspx?Item=N82E16822136591 $50
Power Supply http://www.newegg.com/Product/Product.aspx?Item=N82E16817151110 $210
GPU's: Sapphire ATI 7970 http://www.tigerdirect.com/applications/SearchTools/item-details.asp?EdpNo=7369719&CatId=7387 $440 X 3 = $1320

I have money to invest in a rig(s), but face constraints on power and space. I want to be able to post to the hardware forum.

I have been following bitcoin for years and have previously mined using my gpu with cgiminer on the Eligius pool. I believe I will be a positive asset to the BitCoinTalk community.

There are lots of pools. Just use a different one.

Probably would not be worth it at current difficulties. You would need to invest more into the rig for be it to be worth it.

Few ASICs have ever shipped. Evidence shows that they are most likely vaporware. GPU mining is the only viable option currently.

However, if the ASICs do get released, gpu mining will quickly become obsolete.

This is just a platform for gambling. Obviously, the expected return for the gambler is negative.

Multiple exchanges offers the opportunity for arbitrage.