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mining rig question, 5x 280x & 2x 750w? yes/no?

post #1 of 7
Thread Starter 
how exactly do I use 2 power supplies to power 5 cards? will this work out for me? am I splitting one of the pcie 8 pin plugs into 2?

my cards seem to have 8+6 pin plug configuration, and each psu has only 2x 8pin, 2x 6pin...

im getting 7 of these:

http://www.ncix.com/products/?sku=90039&promoid=1374
Corsair Professional Series HX750 750W ATX Fully Modular 80PLUS Gold Power Supply Refurbished

and one of these:

http://www.ncix.com/products/?sku=90066
Seasonic M12II 750W EPS12V 20/24PIN ATX Power Supply 80+ Bronze Full Modular 8PIN PCI-E 120mm Fan

im getting 2x 970 ud3 boards, 1x 970 ud3P, 1x 990fxa
4x gskill 2x2gb 1600
3x Sempron 145s , 1x something better am3+
4x 8gb usb memory sticks
risers ordered
280xs in the mail

did I forget anything? do I need any fans or..? any1 see any problems here?

thanks
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N/A II
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post #2 of 7
Are you using riser cables?

If so, you could get all 5 cards onto that 990fxa mobo.

You use one PSU as main, use the paper clip method to turn on the other PSU. Connect the PCI power to the GPUs using both PSUs.


If you want to run them in 2 seperate rigs then that would work too.

If you want the 2 PSUs to power 3 mobos then you need to cut of a mobo connector from an old PSU and solder the connector to one of the PSUs.
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Power Bac G5
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post #3 of 7
I just realized you dont have enough PCIe connectors.

You could either get better PSUs, or you can get molex to PCIe connectors from ebay. Shipping might take 2 month.

You could also cut off PCIe power plugs from old PSUs and solder it to your PSUs.
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Power Bac G5
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post #4 of 7
Thread Starter 
Quote:
Originally Posted by TheLAWNOOB View Post

I just realized you dont have enough PCIe connectors.

You could either get better PSUs, or you can get molex to PCIe connectors from ebay. Shipping might take 2 month.

You could also cut off PCIe power plugs from old PSUs and solder it to your PSUs.

ya this, I have electronics skills. sort of. I can put wires together with plugs, damned if I know how electricity works though.

I have enough spare pcie plugs around to get the job done I think, and 1500w is enough power barely. just wanted to see if anyone saw any glaring errors in my judgement, ive been working on this all weekend lol wave2.gifconfusedsmiley.png
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N/A II
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post #5 of 7
Thread Starter 
my friend wants to know wat the paper clip method is, I know because im not a noob, but if someone could plz fill in here wat exactly is the method and wat its for, my friend would really appreciate it.
N/A II
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Seagate Barracuda 7200rpm SATA6 Samsung Noctua NH-C14 7 Pro 64 - edited 
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2x Samsung 24'' 1920x1080, 1x Acer 24'' 1920x1080 Azio Levetron Mech4 OCZ Z-series 1000W 80+ Gold Coolermaster cm 690 II Advanced - Black 
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Saitek Cyborg R.A.T. 7 - custom Steelseries 9HD Semi Rough Glide Sennheiser PC330 G4ME Headset / Genius SW-2.1 8... 
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N/A II
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Hard DriveOptical DriveCoolingOS
Seagate Barracuda 7200rpm SATA6 Samsung Noctua NH-C14 7 Pro 64 - edited 
MonitorKeyboardPowerCase
2x Samsung 24'' 1920x1080, 1x Acer 24'' 1920x1080 Azio Levetron Mech4 OCZ Z-series 1000W 80+ Gold Coolermaster cm 690 II Advanced - Black 
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Saitek Cyborg R.A.T. 7 - custom Steelseries 9HD Semi Rough Glide Sennheiser PC330 G4ME Headset / Genius SW-2.1 8... 
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post #6 of 7
Take a paper clip, or any piece of conductive metal and bend it. Stick one end of it into the only green wire coming out of the PSU mobo connector, and stick the other end into any black (grounding) wires.

After that's done, wrap it with electrical tape so you won't shock yourself. Flip the power switch on the PSU and it will be on.
Power Bac G5
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i5 6600K @ 4.5Ghz R9 280X with no FreeSync support 8GB 2800Mhz Samsung 850 EVO 250GB 
Hard DriveMonitorPowerCase
2x ADATA SP550 120GB RAID 0 AOC 4k FreeSync TN Panel EVGA SuperNova NEX 750B Parts Directly On Top Cardboard Box 
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Power Bac G5
(8 items)
 
  
CPUGraphicsRAMHard Drive
i5 6600K @ 4.5Ghz R9 280X with no FreeSync support 8GB 2800Mhz Samsung 850 EVO 250GB 
Hard DriveMonitorPowerCase
2x ADATA SP550 120GB RAID 0 AOC 4k FreeSync TN Panel EVGA SuperNova NEX 750B Parts Directly On Top Cardboard Box 
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post #7 of 7
Thread Starter 
ahh right, thank you, its cause theres no power button for it right? smile.gif makes sense now. I remember hearing of this but ive never had to do it.
N/A II
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CPUMotherboardGraphicsRAM
Intel Core i5 2500K @4.4 GHz P8P67 PRO REV 3.1 2x NVIDIA GeForce GTX 570 HD 2560MB oc G. Skill Ripjaws X F3 4x4GB DDR3 1600 
Hard DriveOptical DriveCoolingOS
Seagate Barracuda 7200rpm SATA6 Samsung Noctua NH-C14 7 Pro 64 - edited 
MonitorKeyboardPowerCase
2x Samsung 24'' 1920x1080, 1x Acer 24'' 1920x1080 Azio Levetron Mech4 OCZ Z-series 1000W 80+ Gold Coolermaster cm 690 II Advanced - Black 
MouseMouse PadAudio
Saitek Cyborg R.A.T. 7 - custom Steelseries 9HD Semi Rough Glide Sennheiser PC330 G4ME Headset / Genius SW-2.1 8... 
  hide details  
Reply
N/A II
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 2500K @4.4 GHz P8P67 PRO REV 3.1 2x NVIDIA GeForce GTX 570 HD 2560MB oc G. Skill Ripjaws X F3 4x4GB DDR3 1600 
Hard DriveOptical DriveCoolingOS
Seagate Barracuda 7200rpm SATA6 Samsung Noctua NH-C14 7 Pro 64 - edited 
MonitorKeyboardPowerCase
2x Samsung 24'' 1920x1080, 1x Acer 24'' 1920x1080 Azio Levetron Mech4 OCZ Z-series 1000W 80+ Gold Coolermaster cm 690 II Advanced - Black 
MouseMouse PadAudio
Saitek Cyborg R.A.T. 7 - custom Steelseries 9HD Semi Rough Glide Sennheiser PC330 G4ME Headset / Genius SW-2.1 8... 
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