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Author Topic: WTS Bitcoin Quad 6870 Mining Rig - $900 - OBO  (Read 2636 times)
newmont
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July 08, 2011, 12:40:57 AM
 #1

Asking $900 OBO -  will accept BTC/MtGox USD/Paypal at current exchange rate.
Please PM ALL offers!
Selling my Quad 6870 GPU bitcoin mining rig.
Put into production on May 23rd 2011 in air-conditioned/climate controlled datacenter.
Runs like a Dream, no issues.
Ships with Ubuntu 10.10 and poclbm.py  -ready to mine out of the box
Never Overclocked, though cards support several options.

Rig at stock clockspeed does 1100-1200 M/hash on deepbit
 
Cost $1500+ to build in parts alone

Have done 1 deal on #bitcoin-otc
Also have stellar ebay feeback: http://myworld.ebay.com/tomatosauce

Specs are as follows.

GPUs:
4x ATI Saphire Extreme 6870
1024 MB/1050  Mhz Mem clockspeed
900 Mhz Core clockspeed
PCI Express 2.0 x16

MOTHERBOARD:
MSI AM3 USB 3.0 + Sata 6GB

PSU:
Cooler Master Silent Pro M100 1000W PSU

CPU:
Quadcore AMD Phenom II X4 955  Black Edition 3.2 Ghz

Memory:
Patriot Memory 'Sector 5' G Series 4GB

Case:
COOLER MASTER HAF 932 Advanced RC-932-KKN5-GP Black Steel ATX Full Tower

HD:
IMATION SATA2 64GB SSD (pretty nice)
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newmont
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July 08, 2011, 12:50:12 AM
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Screenshot from said box running poclbm.py on all4 cards


http://staging.ib5k.com/Screenshot.png
CydeWeys
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July 08, 2011, 02:25:15 PM
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Rig at stock clockspeed does 1100-1200 M/hash on deepbit

Um, the screenshot you're showing has the rig outputting less than 1000 MHash/s total.  Yes, every so often it will get lucky and temporarily display a speed of 1100-1200 MHash/s on Deepbit.  By the same token, every so often it will be unlucky, and will display a speed of 700-900 on Deepbit.  You need to take the all-time average, not just the highs.

PSU:
Cooler Master Silent Pro M100 1000W PSU

CPU:
Quadcore AMD Phenom II X4 955  Black Edition 3.2 Ghz

Memory:
Patriot Memory 'Sector 5' G Series 4GB

Case:
COOLER MASTER HAF 932 Advanced RC-932-KKN5-GP Black Steel ATX Full Tower

HD:
IMATION SATA2 64GB SSD (pretty nice)

Well there's your problem.  All of these parts are unnecessary for a dedicated mining rig.  You definitely didn't need that CPU, or that much memory, or a case, or the SSD, and you could've gone with a smaller PSU to boot (around 800-850W).

A few weeks ago I put together a rig, NEW, for $950, composed of 4x5830s, that outputs 1240 MHash/s (that's average, not peak).  So to charge more than that for a used rig that outputs fewer MHash/s, well ... I don't think you're going to find many potential buyers.
newmont
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July 08, 2011, 02:41:26 PM
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I had the SSD and PSU already, albeit unused.
It does get an average of 1100 mhash - on deepbit.
simplecoin
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July 10, 2011, 08:46:52 PM
 #5

yhpm

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