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Help me pick, going to SLI

post #1 of 6
Thread Starter 
Hi guys,

I was lucky enough to pick up (2) MSI Lightning 580s on Amazon on the cheap and need some help deciding if my Corsair HX750 is enough and if not, help selecting from the following:

1) 1000HX - $220
2) AX850 - $179
3) AX1200 - $259

(This is for my sig rig: OC'd i7, 3 HDDs, tons of fans)

I've read here that the 1000HX is dated a bit and I like that the AX series are 100% modular, if I need a new PSU.

Thanks.
Goliath
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Intel I7-980x GigaByte GA-X58A-UD3R MSI GTX 1070 Quicksilver  Corsair Dominator 12GB 
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Samsung 840 Pro (256GB) - 2x Samsung F3 (1TB) LG BH10LS30K Corsair H100i Windows 10 Home (64bit) 
MonitorPowerCase
Samsung BX2235 Corsair HX1000i Corsair 800D 
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Goliath
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7-980x GigaByte GA-X58A-UD3R MSI GTX 1070 Quicksilver  Corsair Dominator 12GB 
Hard DriveOptical DriveCoolingOS
Samsung 840 Pro (256GB) - 2x Samsung F3 (1TB) LG BH10LS30K Corsair H100i Windows 10 Home (64bit) 
MonitorPowerCase
Samsung BX2235 Corsair HX1000i Corsair 800D 
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post #2 of 6
Your HX750 can handle it, but if you want to have a good amount of room or just want to upgrade, get the AX850.
post #3 of 6
I asked this exact question in the psu suggestions thread and the mod there said that the hx750 would be fine. I knew that it would be right on the edge...
post #4 of 6
It should be just fine. If you do end up upgrading for some unknown reason do not get anything past an 850 watt.
Blue Steel
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Blue Steel
(20 items)
 
HTPC
(12 items)
 
Macbook
(13 items)
 
CPUMotherboardGraphicsRAM
i7 860 MSI P55-GD80 Gigabyte GTX 560Ti 1gb Kingston Hyper X Fury 4x4gb 
Hard DriveHard DriveHard DriveHard Drive
Samsung F3 1tb Samsung 830 64Gb Western Digital Green 1tb Samsung 850 EVO 500gb 
Optical DriveCoolingOSMonitor
Lite-On Blu-Ray Player Cooler Master Hyper 212+ Windows 7 Home Premium x64 Acer S231HLBID 23" 
MonitorKeyboardPowerCase
Vizio 32" 1080P Razer BlackWidow Rocketfish 900W HAF 912 
MouseMouse PadAudio
Logitech G402 Hyperion Steel Series QcK Asus Xonar DG 
CPUMotherboardGraphicsRAM
i5 760 Asus P7P55D-E Pro XFX 5570 Corsair XMS3 2x1gb 
Hard DriveOptical DriveCoolingOS
Western Digital Caviar Black 640Gb HP DVD1260 Cooler Master GeminII S524 Windows 7 Enterprise x64 
MonitorPowerCaseMouse
Vizio 32" 1080 Corsair 650TX Silverstone LC13B-E Droid X2 
CPUGraphicsRAMHard Drive
2.4 GHz Intel Core 2 Duo GMA X3100 4GB DDR2 667 MHz 120 GB 
Optical DriveOSMonitorCase
MATSHITADVD-R UJ-867 Mac OS X 13 Macbook 
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Microsoft Arc 
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post #5 of 6
Thread Starter 
Whew...saves me $200+. Thanks for the info guys. I made a thread a month or so ago when I had 480 Lightnings and was told the 750 would be pushing it. I know the 580s aren't quite the power hogs but wasn't sure if current PSU would be enough.
Goliath
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7-980x GigaByte GA-X58A-UD3R MSI GTX 1070 Quicksilver  Corsair Dominator 12GB 
Hard DriveOptical DriveCoolingOS
Samsung 840 Pro (256GB) - 2x Samsung F3 (1TB) LG BH10LS30K Corsair H100i Windows 10 Home (64bit) 
MonitorPowerCase
Samsung BX2235 Corsair HX1000i Corsair 800D 
  hide details  
Reply
Goliath
(14 items)
 
  
CPUMotherboardGraphicsRAM
Intel I7-980x GigaByte GA-X58A-UD3R MSI GTX 1070 Quicksilver  Corsair Dominator 12GB 
Hard DriveOptical DriveCoolingOS
Samsung 840 Pro (256GB) - 2x Samsung F3 (1TB) LG BH10LS30K Corsair H100i Windows 10 Home (64bit) 
MonitorPowerCase
Samsung BX2235 Corsair HX1000i Corsair 800D 
  hide details  
Reply
post #6 of 6
The power gating on the 580s keep them from reaching the ridiculous consumption levels of the 480s. The 480s aren't really more power hungry, only in stress tests like Furmark and OCCT. When running a stress test a pair of 480s could pull up to 600W combined, which made an 850W vastly preferred. With the power limiting features a pair of 580s won't top ~500W.
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