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Is my power supply enough?

post #1 of 13
Thread Starter 
I have a PC Power and cooling silencer 750W that i've had for the last 4 years.



My build is this

AROCK Z68 EXTREME3 GEN3
8GB of ram 4x2gb sticks
I5 2500K @ 4.8GHZ
2X 6950 Twin frozr III in crossfire overvolted to 1.2v and 980/1350 clocks with power cap +20%



Am i killing my power supply? should i not run furmark or anything? is my PSU even enough?



according to phaedrus calc without the overvolts i only need 760w. but with overvolt it says i need 850....
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post #2 of 13
It seems like 750w is the minimum, without OCing. Also depends on PSU brands.
You have OCed your CPU pretty far, need to see what voltage you got up to.

Overvolting your GPUs may be seriously pushing the limit, and it's been 4 years for that PSU, with a warranty of 5, you may be on thin line right now.

I would recommend getting something around 850, like you mentioned. Since you will be upgrading, go for a bit higher, to leave some room for future upgrades and stronger OC.

If you were to run a stress test for both CPU and GPU, your comp might force shut down due to excessive power on the PSU.

Hope this helps.
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Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
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Blue Dream
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Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
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AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
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post #3 of 13
Thread Starter 
Well the thing is i'm not upgrading, i already have this build and i've been running it on the PSU for about 6 months, i just wanted to know if it was okay. i dont have money to get a new psu lol


and my cpu voltage is like 1.27v-1.29v
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post #4 of 13
Quote:
Originally Posted by renji1337 View Post

Well the thing is i'm not upgrading, i already have this build and i've been running it on the PSU for about 6 months, i just wanted to know if it was okay. i dont have money to get a new psu lol
and my cpu voltage is like 1.27v-1.29v

Oh the build is 6 months, but PSU 5 years. Yeah I wouldn't recommend you using a PSU that many years with such power hungry GPUs and OCed.
The CPU voltage is fine I guess.

So do you play games or video render? Something that uses a lot of CPU or GPU power?
Blue Dream
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Dream Rig
(11 items)
 
Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
CPUMotherboardGraphicsGraphics
AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
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Windows 7 64-bit CORSAIR Pro HX850 Corsair Obsidia 800D 
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Blue Dream
(14 items)
 
Dream Rig
(11 items)
 
Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
CPUMotherboardGraphicsGraphics
AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
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Windows 7 64-bit CORSAIR Pro HX850 Corsair Obsidia 800D 
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post #5 of 13
Thread Starter 
I play video games and run furmark/ibt sometimes for overclocking, that's it. i dont run folding@home although id like to sometime


this 750w psu previously fed a 4890 for 3-4years, and then 6months ago i upgraded the whole pc besides the power supply
1080ti 3770K
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i7 3770k @ 4.5ghz Z77X UD3H 1080TI 8gb Trident X 2400MHZ 
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CoolingOSMonitorMonitor
Noctua NH-D14 Windows 8.1 64bit VG248QE QNIX QX2710 
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Vizio M492i Ducky Shine 3 EVGA 1300W G2 Corsair Carbide Air 540 
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1080ti 3770K
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Samsung 840 PRO 128GB WD Blue Crucial M4 256Gb Seagate 3TB 
CoolingOSMonitorMonitor
Noctua NH-D14 Windows 8.1 64bit VG248QE QNIX QX2710 
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Vizio M492i Ducky Shine 3 EVGA 1300W G2 Corsair Carbide Air 540 
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post #6 of 13
Go here: http://extreme.outervision.com/psucalculatorlite.jsp

This site is very accurate. Input all your HDDs, LED/non LED fans, and see what you get, dont forget to OC the CPU.

edit: I tried it and got somewhere close to about 600.
Blue Dream
(14 items)
 
Dream Rig
(11 items)
 
Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
CPUMotherboardGraphicsGraphics
AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
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Windows 7 64-bit CORSAIR Pro HX850 Corsair Obsidia 800D 
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Blue Dream
(14 items)
 
Dream Rig
(11 items)
 
Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
CPUMotherboardGraphicsGraphics
AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
OSPowerCase
Windows 7 64-bit CORSAIR Pro HX850 Corsair Obsidia 800D 
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post #7 of 13
Reading some posts online, a 750w should be perfectly fine for your build. Even thought the PSU is old, it will die, but not from killing it with power, but with a natural death.

So go for it.
Blue Dream
(14 items)
 
Dream Rig
(11 items)
 
Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
CPUMotherboardGraphicsGraphics
AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
OSPowerCase
Windows 7 64-bit CORSAIR Pro HX850 Corsair Obsidia 800D 
  hide details  
Reply
Blue Dream
(14 items)
 
Dream Rig
(11 items)
 
Best HSF
Noctua 6 Dual Heatpipe with 140mm/120mm Dual SSO Bearing Fans CPU Cooler NH-D14 - Retail
CPUMotherboardGraphicsGraphics
AMD Phenom II x4 965 3.7 ~ 1.376v GIGABYTE 990fxa-UD3 Asus GTX 460 1GB 256-bit SLI Msi GTX 460 1Gb 256-bit SLI 
RAMHard DriveHard DriveHard Drive
Corsair Vengeance DDR3 (2x4gb) 1600mhz Crucial M4 64gb win7 WD 1TB 7200 Hitach 300gb 
CoolingCoolingOSMonitor
Noctua NH-D14 CM 120mm - CM 2x 200mm - CM 140mm Windows 7 ultimate x64 23" Acer 1080p 
PowerCase
XFX PRO 750w XXX CM HAF 912 
CPUMotherboardGraphicsRAM
Intel 3770k  EVGA Z68 FTW GTX 690 Mushkin Enhanced Redline 16GB (4 x 4GB) 
Hard DriveHard DriveOptical DriveCooling
Intel 520 180GB RAID 0  Intel 520 180GB RAID 0  Blu-ray read/write XSPC Rasa 750 
OSPowerCase
Windows 7 64-bit CORSAIR Pro HX850 Corsair Obsidia 800D 
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post #8 of 13
Get an cheap wall socket wattage meter and measure your systems full load wattage. My sigrig draws 720W @ the socket on full load. That's about 620W PSU output. I would think your system stays way below the 750w mark as well but I don't know how much more the released power cap +20 and over volt will draw power.
Edited by Bit_reaper - 2/10/12 at 4:31pm
    
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generic LG DVD WC'd , Supreme LT, NexXxoS Xtreme III 360, Phob... Windows 7 x64 Samsung 27" LED S27A550B 
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ACER 23" x233H Dell U3415W Logitech G11 Chieftec 850W 
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post #9 of 13
I think you are perfectly fine.........

People always think they need more power than they actually do.
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post #10 of 13
Quote:
Originally Posted by renji1337 View Post

I have a PC Power and cooling silencer 750W that i've had for the last 4 years.
My build is this
AROCK Z68 EXTREME3 GEN3
8GB of ram 4x2gb sticks
I5 2500K @ 4.8GHZ
2X 6950 Twin frozr III in crossfire overvolted to 1.2v and 980/1350 clocks with power cap +20%
Am i killing my power supply? should i not run furmark or anything? is my PSU even enough?
according to phaedrus calc without the overvolts i only need 760w. but with overvolt it says i need 850....

you are fine. CF 6950 stock...all you need is a 600w psu.

750w can handle 6970s.
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MCC
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