Topic: Finally got my (mini) mining rig up... details and results for anyone interested (Read 1290 times)

So here's what I got:

2 Sapphire Vapor-X 7950's - http://www.newegg.com/Product/Product.aspx?Item=N82E16814202003
Thermal Take Black Widow 850W - http://www.newegg.com/Product/Product.aspx?Item=N82E16817153106
ASRock 970 Extreme4 - http://www.newegg.com/Product/Product.aspx?Item=N82E16813157262
GSkill 8GB (2x 4GB) DDR3 memory - http://www.newegg.com/Product/Product.aspx?Item=N82E16820231311
AMD Sempron 145 - http://www.newegg.com/Product/Product.aspx?Item=N82E16819103888

Cost: $943

I had a spare laptop hard drive laying around that I'm using for storage, and also had a spare retail license for Win7. I still need to order a couple of risers and grab a box fan at walmart as soon as I get a chance.

Took me a little while to figure out everything with over clocking, but here's what I learned so far:

- Sapphire's Trixx app sucks (disclaimer: It might be me that sucks for not figuring out how to use it right)
- Finally loaded up MSI AfterBurner and enabled voltage support
- Used MSI after burner to jump both cards to 1100 GPU clock and 1500 memory clock.

Things worked good, but after running it overnight like this, I realized that one of my GPUs was getting about 100kh/s more than the other. I looked in afterburner and realized the one that was under performing was jumping between 70 & 100 GPU and memory utilization. I found someone else that had the same issue on another forum, and they said bumping up their Power Limit to +20% solved the issue. Did this, and I've been getting a steady 630kh/s per card since, but usually closer to 640kh/s. Here are my cgminer settings:

--shaders 1792 --gpu-engine 1100 --gpu-memclock 1500 -I 20 -w 256 --lookup-gap 2 --thread-concurrency 24000 -g 1

Temps are averaging 65C.

I also bought two crates that I'll stick everything in once I get my risers. I'll take some pics once I have everything looking (somewhat) pretty. If I can afford it, will probably upgrade the psu and grab a couple more 7950's in the next month. I actually think I could probably get away with adding one more 7950, but I'm not going to mess with that until I get a multi meter to see what it's pulling w/two. I'm thinking I'll definitely feel a lot safer with at least a 1050 if I upgrade to 4.