Is buying 2 5GH/s BFL rigs a good idea? : BitcoinMining

Setting up 3x7970s, need help getting them to run...

I'm building a 3x7970 box for bitcoin,hashcat, etc and am using this board:
MSI Big Bang-XPower LGA 1366 Intel X58
I have read the manual and for the life of me I can't get all 3 cards recognized. I can get two recognized in control panel & catalyst center no problem. All cards are functional - just not all 3 at the same time. From what I read the board should support all I wrong? Help please!
submitted by hardwarethrawayq to hardware [link] [comments]

[Build Help] Not sure about 3-way CrossFireX

So let me preface this part list with a little background to explain the weird part selection. My friend and I are looking to get into Bitcoin mining, and it was recommended that we go with a 3x7970 GPU configuration. Will this motherboard/case/GPU combination work in CrossFire configuration? And will the power supply be enough? PCPartPicker has never steered me wrong before, but I've never tried to use CrossFireX, so I don't want to buy something I'll without getting a second opinion...
PCPartPicker part list / Price breakdown by merchant / Benchmarks
Type Item Price
CPU AMD Sempron 145 2.8GHz Single-Core Processor $38.99 @ Newegg
Motherboard MSI 990FXA-GD80V2 ATX AM3+ Motherboard $164.99 @ Newegg
Memory Corsair Vengeance 4GB (1 x 4GB) DDR3-1600 Memory $27.20 @ Newegg
Storage Western Digital Caviar Blue 80GB 3.5" 7200RPM Internal Hard Drive -
Video Card Gigabyte Radeon HD 7970 3GB Video Card (3-Way CrossFire) $399.99 @ Newegg
Video Card Gigabyte Radeon HD 7970 3GB Video Card (3-Way CrossFire) $399.99 @ Newegg
Video Card Gigabyte Radeon HD 7970 3GB Video Card (3-Way CrossFire) $399.99 @ Newegg
Case Azza CSAZ-1000 ATX Full Tower Case $110.98 @ Newegg
Power Supply PC Power & Cooling Silencer Mk II 950W 80 PLUS Silver Certified ATX12V / EPS12V Power Supply $137.98 @ Newegg
Optical Drive Lite-On iHAS124-04 DVD/CD Writer $14.99 @ Newegg
Prices include shipping, taxes, and discounts when available. $1725.10
Generated by PCPartPicker 2013-04-14 00:07 EDT-0400
submitted by OneWhoPropes to buildapc [link] [comments]

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