I use Intel, AMD is cheaper
Asus P8B WS is about $230, has 4 pcie slots, 1 1x slot
a 1200W PSU should be able to power 4x5970 when you underclock ram and don't overclock the rest
G530 CPU about $40, RAM about $20 or less
Topic: 8000 usd to spend for minig rig on 6990s and/or 5970s (Read 1732 times)
ATI's driver limits you to 8 cores max. This means only 4 dual GPU cards per motherboard.
It's pretty easy to find a MB that can support 4 GPUs. There are plenty of examples here on the forums. PSU are a different matter, but 2x 800+W Gold PSUs should be fine for each rig. And when you're running multiple KWh mining rigs, the electric savings by getting a Gold PSU are not negligible.
Lets assume you're using 5970s, as they're far cheaper than 6990s. Each rig will need some sort of case, a MB, CPU, RAM, USB stick, 4x GPUs, 4x risers, and 2x PSU. Lets call it ~1500 per rig. That gives you 5 rigs, which is ~16GH/s.
However, this may not be what you're looking for, but if I had 8000 to spend on mining hardware, here's what I would do: Buy 6 BFL Singles, and 6 SC Single upgrades. Get your Singles in ~50 days, and mine at ~5GH/s. When your order comes up, upgrade to 6 SC Singles for a total of ~240GH/s. WAY simpler, easier, and IMO better off in the end. Unless of course you like managing 20 GPU farms...
It's pretty easy to find a MB that can support 4 GPUs. There are plenty of examples here on the forums. PSU are a different matter, but 2x 800+W Gold PSUs should be fine for each rig. And when you're running multiple KWh mining rigs, the electric savings by getting a Gold PSU are not negligible.
Lets assume you're using 5970s, as they're far cheaper than 6990s. Each rig will need some sort of case, a MB, CPU, RAM, USB stick, 4x GPUs, 4x risers, and 2x PSU. Lets call it ~1500 per rig. That gives you 5 rigs, which is ~16GH/s.
However, this may not be what you're looking for, but if I had 8000 to spend on mining hardware, here's what I would do: Buy 6 BFL Singles, and 6 SC Single upgrades. Get your Singles in ~50 days, and mine at ~5GH/s. When your order comes up, upgrade to 6 SC Singles for a total of ~240GH/s. WAY simpler, easier, and IMO better off in the end. Unless of course you like managing 20 GPU farms...
ive just sold my mining rig and want to build new more compact one based on 6990s and/or 5970s,
what configurations would You suggest MB/PSU/how many cards per set that would be optimum for performence and still be stable
i mean theoratically best is 8x6990 in one mb but i dont know any user to have this set stable running ( drivers issue , psu ? etc .. )
ive seen many sets running stable 3x5970 on 1200 psu but i dont know it is best idea , as ive seen here are much more experienced people than me, so some help would be great
best regards
Ernest
what configurations would You suggest MB/PSU/how many cards per set that would be optimum for performence and still be stable
i mean theoratically best is 8x6990 in one mb but i dont know any user to have this set stable running ( drivers issue , psu ? etc .. )
ive seen many sets running stable 3x5970 on 1200 psu but i dont know it is best idea , as ive seen here are much more experienced people than me, so some help would be great
best regards
Ernest
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