Overclock.net › Forums › AMD › AMD - General › Vcore Higher than Set -- Why?
New Posts  All Forums:Forum Nav:

Vcore Higher than Set -- Why?  

post #1 of 7
Thread Starter 
Hello,

I just built and OCed my new system, but I am noticing a troubling thing regarding the CPU core voltage. Note that this occurs both when my computer is overclocked and when it is not:

The CPU core voltage always seems significantly higher than the default value (1.3V) which it is set to. For example, at idle, CPU-Z usually displays 1.360V - 1.367V, while EasyTune5 Pro displays 1.390V - 1.400V. Under heavy load, CPU-Z displays a core voltage of 1.424V, and EasyTune5 Pro displays 1.45V!

My questions are as follows:
(1) Why is Vcore higher than 1.3V (at which it is set) at idle?
(2) I do not know whether or not Vcore is supposed to vary with load -- is this "voltage throttling" intended? If so, is it acceptable to go as high as 1.45V under load?

Of interest may be the fact that I have a Thermaltake 430W PSU. The +3.3V and +12V buses seam to be mostly steady and, as measured by EasyTune5 Pro, are 3.290V and 11.920V at idle, 3.280V and 11.985V at heavy load. At all times EasyTune shows GPU Vcore as 1.350V. To me, this small voltage drop under heavy load is a possible indicator of the system being underpowered, but I was under the impression that 430W was sufficient for my setup.

Thanks for any help,
Paul

Setup: AMD 64 X2 5000+ Black Edition CPU, Gigabyte GA-M57SLI-S4 Mobo, 2x1GB G.Skill DDR2 800 RAM, Zalmon 92mm HSF, 320GB Samsung Spinpoint HDD, Thermaltake 430W PSU, MSI X1550 GPU
My Puter
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.8GHz / 1.254V MSI P43-C51 Sapphire Radeon HD 4670 G.Skill 4GB (2x2GB) DDR3-1600 
Hard DriveOSPowerCase
64GB SSD, 320GB HDD, 500GB HDD, 1TB HDD Windows 7 x64 Antec 550W Lian Li PC-61 
  hide details  
My Puter
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.8GHz / 1.254V MSI P43-C51 Sapphire Radeon HD 4670 G.Skill 4GB (2x2GB) DDR3-1600 
Hard DriveOSPowerCase
64GB SSD, 320GB HDD, 500GB HDD, 1TB HDD Windows 7 x64 Antec 550W Lian Li PC-61 
  hide details  
post #2 of 7
Voltage in cpuz is rarely in sync with bios set vcore. Trust cpuz.
Black Box 3
(13 items)
 
  
CPUMotherboardGraphicsHard Drive
i7 920 4GHz 1.248 VCore Gig EX58-UD3R 5870 2x160GB Hitachi RAID 0, 500GB WD 
Optical DriveOSPowerCase
ASUS DRW-2014L1T Windows 7 Ultimate 64bit SilverStone Zeus 850w Antec 902 
  hide details  
Black Box 3
(13 items)
 
  
CPUMotherboardGraphicsHard Drive
i7 920 4GHz 1.248 VCore Gig EX58-UD3R 5870 2x160GB Hitachi RAID 0, 500GB WD 
Optical DriveOSPowerCase
ASUS DRW-2014L1T Windows 7 Ultimate 64bit SilverStone Zeus 850w Antec 902 
  hide details  
post #3 of 7
indeed, cpuz is god
Xavier i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 @ 3.6 ghz EVGA X58 SLI A1 2x BFG GTX285 SLI 6GB Corsair XMS3 DDR3 1600 
Hard DriveOptical DriveOSMonitor
WD 500GB + 1TB Storage ASUS DRW-2014L1 20x DVD±RW (LS) Windows 7 Pro 2x Samsung 23" P2350 
KeyboardPowerCaseMouse
Logitech G15 Rev.2 Corsair HX850W CM 690 II CM Storm Sentinel Advance 
  hide details  
Xavier i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 @ 3.6 ghz EVGA X58 SLI A1 2x BFG GTX285 SLI 6GB Corsair XMS3 DDR3 1600 
Hard DriveOptical DriveOSMonitor
WD 500GB + 1TB Storage ASUS DRW-2014L1 20x DVD±RW (LS) Windows 7 Pro 2x Samsung 23" P2350 
KeyboardPowerCaseMouse
Logitech G15 Rev.2 Corsair HX850W CM 690 II CM Storm Sentinel Advance 
  hide details  
post #4 of 7
Thread Starter 
Thanks so much for that helpful information. Did I post in the wrong forum or something?
My Puter
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.8GHz / 1.254V MSI P43-C51 Sapphire Radeon HD 4670 G.Skill 4GB (2x2GB) DDR3-1600 
Hard DriveOSPowerCase
64GB SSD, 320GB HDD, 500GB HDD, 1TB HDD Windows 7 x64 Antec 550W Lian Li PC-61 
  hide details  
My Puter
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.8GHz / 1.254V MSI P43-C51 Sapphire Radeon HD 4670 G.Skill 4GB (2x2GB) DDR3-1600 
Hard DriveOSPowerCase
64GB SSD, 320GB HDD, 500GB HDD, 1TB HDD Windows 7 x64 Antec 550W Lian Li PC-61 
  hide details  
post #5 of 7
no your fine no worries
Xavier i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 @ 3.6 ghz EVGA X58 SLI A1 2x BFG GTX285 SLI 6GB Corsair XMS3 DDR3 1600 
Hard DriveOptical DriveOSMonitor
WD 500GB + 1TB Storage ASUS DRW-2014L1 20x DVD±RW (LS) Windows 7 Pro 2x Samsung 23" P2350 
KeyboardPowerCaseMouse
Logitech G15 Rev.2 Corsair HX850W CM 690 II CM Storm Sentinel Advance 
  hide details  
Xavier i7
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 920 D0 @ 3.6 ghz EVGA X58 SLI A1 2x BFG GTX285 SLI 6GB Corsair XMS3 DDR3 1600 
Hard DriveOptical DriveOSMonitor
WD 500GB + 1TB Storage ASUS DRW-2014L1 20x DVD±RW (LS) Windows 7 Pro 2x Samsung 23" P2350 
KeyboardPowerCaseMouse
Logitech G15 Rev.2 Corsair HX850W CM 690 II CM Storm Sentinel Advance 
  hide details  
post #6 of 7
Thread Starter 
Well then, if I'm in the right place, do you have any insight as to the questions I asked? And if you do, would you mind sharing it?
My Puter
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.8GHz / 1.254V MSI P43-C51 Sapphire Radeon HD 4670 G.Skill 4GB (2x2GB) DDR3-1600 
Hard DriveOSPowerCase
64GB SSD, 320GB HDD, 500GB HDD, 1TB HDD Windows 7 x64 Antec 550W Lian Li PC-61 
  hide details  
My Puter
(13 items)
 
  
CPUMotherboardGraphicsRAM
E8400 @ 3.8GHz / 1.254V MSI P43-C51 Sapphire Radeon HD 4670 G.Skill 4GB (2x2GB) DDR3-1600 
Hard DriveOSPowerCase
64GB SSD, 320GB HDD, 500GB HDD, 1TB HDD Windows 7 x64 Antec 550W Lian Li PC-61 
  hide details  
post #7 of 7
Quote:
Originally Posted by paulbalegend View Post
Well then, if I'm in the right place, do you have any insight as to the questions I asked? And if you do, would you mind sharing it?
Paulbalegend, if you suspect your PSU is at fault I'd recommend pulling it out and testing the voltages. If you have a multimeter handy you can check the votlages that way. Here is a guide that explains this process: http://www.clunk.org.uk/forums/guide...ing-guide.html

Let us know what you find.

Good luck
Workstation
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon II X4 620 Asus M4A785-M Asus 5770 G.Skill 8GB DDR2-800 
Hard DriveOSMonitorPower
WD3200AAJS Windows 7 Pro Acer AL2216W, Samsung P2770 Corsair 550VX 
Case
Tagan Black Pearl 
  hide details  
Workstation
(13 items)
 
  
CPUMotherboardGraphicsRAM
Athlon II X4 620 Asus M4A785-M Asus 5770 G.Skill 8GB DDR2-800 
Hard DriveOSMonitorPower
WD3200AAJS Windows 7 Pro Acer AL2216W, Samsung P2770 Corsair 550VX 
Case
Tagan Black Pearl 
  hide details  
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: AMD - General
This thread is locked  
Overclock.net › Forums › AMD › AMD - General › Vcore Higher than Set -- Why?