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CPU voltage fun

post #1 of 7
Thread Starter 
I wonder if I drop a cpu's voltage from 1.45, to 1.36 without OCing of underclocking, what are the cons and pros. I know it doesn't heat up as much, but do I get lower performance?

Sig rig is current rig.

If it is stable, can I just take it down more, get better temps?
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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
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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) 
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post #2 of 7
Lower voltage is like free money!
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post #3 of 7

Undervolting does not give you lower performance unless you are unstable.  Since you are running your 125W 965 a motherboard that is known for VRM failure with all 125W TDP processors and even some 95W TDP processors I advise that you undervolt as much as you can to reduce power strain on motherboard components, at least until you can find a new motherboard which I recommend you do regardless.

post #4 of 7
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post

Undervolting does not give you lower performance unless you are unstable.  Since you are running your 125W 965 a motherboard that is known for VRM failure with all 125W TDP processors and even some 95W TDP processors I advise that you undervolt as much as you can to reduce power strain on motherboard components, at least until you can find a new motherboard which I recommend you do regardless.

Yeah will install gigabyte 990fxa-ud3 in a few days, once i get RAM, I heard that this board has 8+2 phase, which is good for OC, yeah I will keep it at 1.36V. I have seen some peeps at 9x5 OC CLUB, that some have OCed 965 to 3.8ghz stable with 1.36v thumb.gif

That makes me a happy guy.


You have replied to all of my posts. You are GOD
Thanks
Blue Dream
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Dream Rig
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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 
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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
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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) 
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post #5 of 7
Aregvan,

as a quad and stock i run mine at 1.12v. as a hexcore and at stock - 1.14V. both stable with lovely temps.
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post #6 of 7
Thread Starter 
Quote:
Originally Posted by rdr09 View Post

Aregvan,
as a quad and stock i run mine at 1.12v. as a hexcore and at stock - 1.14V. both stable with lovely temps.

WOW that low? NICE

I am Ocing mine to 3.8, slowly, and will try to test the lowest v needed. I got many BSODs on the way.

Thanks for the good news. thumb.gif
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 
  hide details  
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post #7 of 7
i know its not a 965, but i drop my 1055t to 0.95-1.1v when i am not planning on doing anything that calls for 4ghz.. it drops temps about 5c.
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