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AX750 GTX480SLi

post #1 of 23
Thread Starter 
Hi,

I am wondering if an AX750 will power up GTX480 SLI @800 with an i7 950@ 4 and a 8800GTS or 9800GT for PhysX running on Molex to PCIe. Plus, SSD, 2 Velociraptors, a black and one optical with 5 USB devices.

I did the PSU calculator thing, and it suggests a 850W including an additional PCIeX8 device (PhysX).

However, I believe a PhysX 99% of the time is idling and SLI GTX480 will not consume the full power specs due to scaling.

Thus, will I be safe running this setup, with a very high quality PSU - AX750?
I am limit to AX750 because I have the opporunity to purchase one through retial employee program for 50% of the MSRP.

Or SLI 580 may be doable instead of 480s?
Main Rig V 6.8
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Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
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Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
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Main Rig V 6.8
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
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post #2 of 23
You will need a better power supply. My friends rig with a TX750 flips out with moderately overclocked 470's in SLI
post #3 of 23
Im using a 750w with my i7 oc'd and my 460's oc'd at 800

Not one problem

Not sure how much more 480's use
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1GB  none Windows 7 64bit BenQ XL2720Z @144hz 
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post #4 of 23
u need 777w for an i7 and 2 GTX 580s.. and they use less power so i say no
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post #5 of 23
Thread Starter 
But TX which is still a good PSU is not in the same category as AX or HX series.

I also have the opporunity to get a TX850, but from the reviews I have read, an AX750 or HX750 can easily provide the same 850 power if needed as one is Gold and another near Gold, but the TX is only regular 80 Plus.
Main Rig V 6.8
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
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Main Rig V 6.8
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
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post #6 of 23
Thread Starter 
I know it is on the low side, guess 750 is simply not enough along with 850s?
Main Rig V 6.8
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CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
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Main Rig V 6.8
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
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post #7 of 23
i had two 930mhz 570's + x6 4.2ghz folding 24/7 on my ax750 no problems
post #8 of 23
Thread Starter 
Quote:
Originally Posted by koven View Post
i had two 930mhz 570's + x6 4.2ghz folding 24/7 on my ax750 no problems
see this is the kind of sitaution makes me wonder.
And you are running both @ 1.1v? with CPU on 1.4xV
If I factor that in to a PSU calculator, it will pass 750 for sure.
Main Rig V 6.8
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
  hide details  
Reply
Main Rig V 6.8
(16 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i7 6850K @ 4.4Ghz Asus Rog Rampage V Extreme U3.1 GTX 1080 Ti @ 2050/6000 Corsair Vengance LPX 16GB DDR4-2800 
Hard DriveHard DriveHard DriveHard Drive
Intel 600P 512GB NVMe Samsung 850 PRO 256GB Samsung 850 EVO 500GB WD Caviar Black 640GB X2 
CoolingOSMonitorKeyboard
Corsair H115i AIO Windows 10 Pro x64 Philips BDM4350UC 4K Monitor 10bit + LG IPS231P Corsair K70 LUX CherryMX Brown 
PowerCaseMouseAudio
Corsair AX1200 80Plus Gold Thermaltake Core P3 Logitech G502 Proteus Core  ALC1150 Optical Out to Pioneer VSX-824-K 
  hide details  
Reply
post #9 of 23
yeah both gpu's 1.1v and vcore at 1.5v
post #10 of 23
Yes its enough, but cutting it close.

480 consumes ~295watts which equates to 25amps on the +12v rail.

The AX750 should be good enough to provide 31amps for each +12v rail...

Over clocked? I'm not sure about over clocked, but you can always over load a good quality PSU and still be fine. It just won't be as efficient.
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Po' Pimpin'
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