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What is VDDC?

post #1 of 3
Thread Starter 
So im currently trying to overclock my crossfire 5850's and im using furmark 1.9.0 to test and it reads my voltage as 1.225, vcore at 950 and mem at 1200, then it also has VDDC at 1.088V, i read somewhere that this is memory voltage? would i need to overclock it to bring my memory up to 1300? if so how do i overclock my VDDC i dont see any options for it in afterburner.

Thanks
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The RIG
(25 items)
 
  
CPUMotherboardGraphicsGraphics
i5 750 @ 4.0Ghz Gigabyte P55 UD4 ATI 5850 ATI 5850 
RAMHard DriveHard DriveHard Drive
2x2 (4GB) Kingston Hyp-X 2000mhz OCZ Vertex 2 60G Boot 1.5TB Seagate Barracuda 7200.11 1.5TB Seagate Barracuda 5400.LP 
Hard DriveCoolingOSMonitor
1.5TB Seagate Barracuda 5400.LP Cooler Master V8 W7 64b Home Premium Dell 23" U2311h 
MonitorMonitorMonitorKeyboard
Dell 23" U2311h Dell 23" U2311h Samsung 51" PS51D550 3D Plasma Logitech G15 
PowerCaseMouseMouse Pad
Corsair TX-850 Coolermaster 922 Haf W/ Window Logitech G500 Razor Sphex 
AudioAudioAudioOther
X-Fi Titanium Fatal1ty Logitech G35 Logitech Z-5500 NZXT 2M Red LED Lighting 
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post #2 of 3
VDDC is basically your vrm or memory voltage. In Afterburner you need to tinker with memory clock to OC you mems but it has no option to adjust VDDC voltage. Though I think in afterburner when you adjust the memory clock, the voltages are adjusted automatically.
post #3 of 3
Thread Starter 
ok if thats the case then i guess furmark doesnt read the VDDC voltages acurately, as it seems to always be 1.088, i know i read somewhere that furmark doesnt read the VDDC change even if you make it in the bios, but i dont feel comfortable editing my bioses, so i guess ill stick with 1.275V, 975vcore and 1200 mem, since i cant get it over 1200mem at all without it freezing or crashing in the first 1 min of furmark, time to run furmark for a few hours and see if im stable.
The RIG
(25 items)
 
  
CPUMotherboardGraphicsGraphics
i5 750 @ 4.0Ghz Gigabyte P55 UD4 ATI 5850 ATI 5850 
RAMHard DriveHard DriveHard Drive
2x2 (4GB) Kingston Hyp-X 2000mhz OCZ Vertex 2 60G Boot 1.5TB Seagate Barracuda 7200.11 1.5TB Seagate Barracuda 5400.LP 
Hard DriveCoolingOSMonitor
1.5TB Seagate Barracuda 5400.LP Cooler Master V8 W7 64b Home Premium Dell 23" U2311h 
MonitorMonitorMonitorKeyboard
Dell 23" U2311h Dell 23" U2311h Samsung 51" PS51D550 3D Plasma Logitech G15 
PowerCaseMouseMouse Pad
Corsair TX-850 Coolermaster 922 Haf W/ Window Logitech G500 Razor Sphex 
AudioAudioAudioOther
X-Fi Titanium Fatal1ty Logitech G35 Logitech Z-5500 NZXT 2M Red LED Lighting 
Other
Asus PCE-N13 Wireless Adapter 
  hide details  
Reply
The RIG
(25 items)
 
  
CPUMotherboardGraphicsGraphics
i5 750 @ 4.0Ghz Gigabyte P55 UD4 ATI 5850 ATI 5850 
RAMHard DriveHard DriveHard Drive
2x2 (4GB) Kingston Hyp-X 2000mhz OCZ Vertex 2 60G Boot 1.5TB Seagate Barracuda 7200.11 1.5TB Seagate Barracuda 5400.LP 
Hard DriveCoolingOSMonitor
1.5TB Seagate Barracuda 5400.LP Cooler Master V8 W7 64b Home Premium Dell 23" U2311h 
MonitorMonitorMonitorKeyboard
Dell 23" U2311h Dell 23" U2311h Samsung 51" PS51D550 3D Plasma Logitech G15 
PowerCaseMouseMouse Pad
Corsair TX-850 Coolermaster 922 Haf W/ Window Logitech G500 Razor Sphex 
AudioAudioAudioOther
X-Fi Titanium Fatal1ty Logitech G35 Logitech Z-5500 NZXT 2M Red LED Lighting 
Other
Asus PCE-N13 Wireless Adapter 
  hide details  
Reply
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