Hi,
Since I am a new newbie I could not post to this thread:
https://bitcointalk.org/index.php?topic=172603.0I am building (I know a bit late to the game) a mining rig using 3 7850s. Putting aside the flaming for buying this gpu - can anyone help me get comfortable around which power supply to get? I know psu is very critical, so I want to buy the right one. But it seems the prices move pretty steeply at the higher watts.
Would a 750W be ok? Would bronze be ok or do I need better?
Based on the thread I linked it seems like those 3 would run about 450W, I am using a sempron 145 chip. I pasted some of the text below from that thread. Many thanks!
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Re: What hash rate can I expect from 3 x 7850s?
April 12, 2013, 07:01:16 AM
Oh I forgot the best part. Im pulling 580 watts out of the wall with those 4 gpus. I bought a watt meter to keep tabs on my power. Doing math X3 would prob consume 450 watts.
btcminer021
I was getting about 750MH/s with 3x GPUs, but the middle one was running too hot. Now with 2xGPUs I get 525MH/s, so about 250MH/s each. This is stock. I will start OC tonight. I'm hoping for at least 300MH/s each OC. Next step is to get risers so I can get some more airflow between the cards. Suggestions to support the cards without PCI brackets?"
