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Could i use 2 Powersupplies for 1 PC ?

post #1 of 6
Thread Starter 
Hi,

I noticed that my powersupply was strugeling when i used it to feed a Crossfire HD6770 with a HD6750
( bridgeless crossfire ) The psu is a Corsair TX 650w one 52 amp 12v rail.
Would it be harmfull to use another 650w psu i have to connect to the second card.
I know it can be done. But is it harmfull in any way? to see the rest of my spec's look at my profile.
sorry for the bad english. rolleyes.gif
post #2 of 6
Get one larger PSU its better then two

Wait what you are not using a bridge???
Seravee
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Seravee
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Samsung 840 Evo WD Green WD30EZRX  WD Green WD40EZRX  WD Green WD60EZRX  
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WD Red WD80EFZX 8TB  LG CH12NS30 5x Noctua NF-A14 FLX Noctua NH-D15 
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Windows 7 64 Bit Asus PG279Q Corsair Gaming Strafe RGB EVGA SuperNova G2 750 watt 
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Phanteks Enthoo Luxe Roccat Kone XTD Laser Roccat Sense Metor Sennheiser HD 598 
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post #3 of 6
Your CFX setup doesn't use 650W, it likely barely uses 550W - what makes you think that your PSU is struggling?
The Laptop
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The Laptop
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post #4 of 6
I agree. Your TX 650 will be more than sufficient.
Red Dwarf
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Red Dwarf
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Hard DriveHard DriveHard DriveHard Drive
Crucial M4 256GB [Firmware 070H]  Crucial M4 256GB [Firmware 070H] Crucial M4 512GB [Firmware 070H] HGST Deskstar 7K4000 7200RPM 4TB 
Hard DriveHard DriveHard DriveOptical Drive
Samsung Spinpoint F3 7200RPM 1TB Western Digital My Passport 2TB [Backup] Western Digital My Passport 2TB [Backup] Samsung SE-208DB/TSBS External USB DVD-RW  
CoolingCoolingCoolingOS
Corsair H100i /w 2x Noctua NF-F12 Noctua NF-A14 FLX Front Intake x2 Noctua NF-S12B FLX Rear Exhaust Windows 7 Professional 64-Bit  
OSMonitorMonitorKeyboard
Windows 8.1 64-Bit  ASUS VG278H 27" [120Hz 3D] Dell UltraSharp U2312HM 23" IPS  Ducky Shine II TKL DK9087 [Cherry MX Browns] 
PowerCaseMouseMouse Pad
Corsair AX860 CoolerMaster 690 III Razer DeathAdder 3.5G/ Razer Naga 2012 Razer Goliathus Extended [Speed Edition] 
AudioAudioAudioOther
Sennheiser HD 598  Corsair SP2500 2.1  Asus Xonar DGX 5.1 with built in Headphone Amp Razer Mouse Bungee  
OtherOther
Corsair Black Sleeved Cables [Generation 2] BitFenix Black Sleeved Cables 
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Intel i5-2500K 4.5GHz  Asus P8Z68-V PRO EVGA GTX 570 1.3GB Corsair Vengeance LP 8GB 1600Mhz [CL9] 
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Samsung 830 128GB SSD  Seagate Barracuda ST1000DM003 1TB 7200rpm Pioneer DVD-RW Coolermaster Hyper 212 Evo 
OSMonitorKeyboardPower
Windows 7 Professional 64-Bit Samsung SyncMaster 22" 1080p SteelSeries 6Gv2 [Cherry Blacks] Corsair HX750 
CaseMouseMouse PadAudio
CoolerMaster 690 II Advanced Razer DeathAdder 3.5G/ Naga 2012 Razer Goliathus Speed  Sennheiser HD 202 
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Tepig TY Beanie Mascot 
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AMD Athlon II X2 250 3.0GHz Asus M4A78-EM Sapphire ATI HD 5670 1GB  Kingston Hyper-X 2GB 1066MHz [CL 5] 
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Western Digital Caviar SE 250GB 7200RPM Pioneer DVD-RW Stock AMD Heatsink Windows XP SP3 
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post #5 of 6
Thread Starter 
I was playing BF4 in HD3D ( 3D monitor ) and i noticed my fan lights seriously dim and brighten like it was having difficulties to supply enough power.Maybe its the combination of all the aircooling,lights,processor,mobo. It only happens when demanding HD3D in newer titles.
My HD 7870XT card is in rma at the moment. That's why i am using two older cards. And yes bridgeless CF
Many people don,t know about it but i believe its possible from HD 4 or 5000 series and upwards.
They even call it Xfire now with the R9 290 series now. But the technology isn't new.
post #6 of 6
Because you have the corsair tx and not the cx one i think you will be fine with your current psu. But your regular gpu is rma atm, will you being crossfiring it with another card? In that case get a better psu, and i think the amps on the 12v rail is a bit low. I can recomend the psu i have in my rig. Its about 100 euros. But if u dont play going crossfire you should be fine!
Ye Olde Computer!
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Htpc rig
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Htpc rig 2
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Fx 8350@5ghz Gigabyte GA-990FXA-UD5 REV 3.0 XFX Radeon R9 280X 3GB (Tahiti XTL) XFX Radeon R9 280X 3GB (Tahiti XTL) 
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Kingston 16GB (4x4096MB) CL11 2133Mhz Beast Series Samsung 840 ssd Corsair h110 Win 7-64bit 
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Ye Olde Computer!
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Htpc rig
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Htpc rig 2
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Fx 8350@5ghz Gigabyte GA-990FXA-UD5 REV 3.0 XFX Radeon R9 280X 3GB (Tahiti XTL) XFX Radeon R9 280X 3GB (Tahiti XTL) 
RAMHard DriveCoolingOS
Kingston 16GB (4x4096MB) CL11 2133Mhz Beast Series Samsung 840 ssd Corsair h110 Win 7-64bit 
MonitorMonitorMonitorKeyboard
Benq gl2250 Hp le2201w Samsung 205BW Andersson KDD 1.5 
PowerCaseMouseMouse Pad
Xfx Proseries XXX Edition 850w Fractal design refine r3 Logitech Steelseries 
AudioOtherOtherOther
On board Fractal design silent series 140mm r2*4 Logitech x-230 Nzxt sentry 2 lcd 
CPUMotherboardGraphicsRAM
Pentium 4 3.6Ghz HP 929 Rev 0E S26 Geforce 9300 Ge Team 800mhz 2gb 
Hard DriveHard DriveOptical DriveOS
Samsung HD08HJ WDC WD2500JB-00REA0 NEC DVD RW ND-4550A Windows XP 
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Ace wireless keyboard HP 365W Compaq EVO Creative SB Live 
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