I have what I consider, 2 serious problems with my P4c800ED motherboard.
1) Vcore varies significantly with processor load :
DATA: Bios set @ 1.725 v
No load Vcore reading = 1.73-1.74 (Asus Probe {AP})
Prime95 running, Vcore = 1.6-1.58 (AP)
That’s a nominal 130-140 mv drop, which I don’t think is acceptable. The results are basically the same regardless of measurement tool ( eg MBM) of CPU stress program. I have owned many ASUS boards & this is the only one that does this.
I fear this may be a HW or design issues.
2) The Vcore set point (eg 1.725) changes back to the Bios default value of 1.50 when coming out of sleep mode,
i.e. System up, no load Vcore reading 1.72 > Go to sleep mode > then wake up, and Vcore is now at 1.50V.
Restarting the computer (warm or cold start) restores the correct Vcore setting. Also, going into & out of Hibernate mode works properly (e.g. Vcore remains at 1.725).
I suspect this could be a Bios bug, but it could be a HW problem related to #1.
Any help would be greatly appreaciated.
SYSTEM details:
System:
Asus P4C800-E Deluxe, P4 2.6 @3.5G, OCZ PC4000 512MB RAM
2x WD 36G S-ATA in bootable RAID 0 configuration
WD2000 IDE, PlexWriter 52x, ZIP 750
ATI Radeon 9800 pro 128
Case Lian-li PC76 with 8 fans
OS: Windows XP pro
1) Vcore varies significantly with processor load :
DATA: Bios set @ 1.725 v
No load Vcore reading = 1.73-1.74 (Asus Probe {AP})
Prime95 running, Vcore = 1.6-1.58 (AP)
That’s a nominal 130-140 mv drop, which I don’t think is acceptable. The results are basically the same regardless of measurement tool ( eg MBM) of CPU stress program. I have owned many ASUS boards & this is the only one that does this.
I fear this may be a HW or design issues.
2) The Vcore set point (eg 1.725) changes back to the Bios default value of 1.50 when coming out of sleep mode,
i.e. System up, no load Vcore reading 1.72 > Go to sleep mode > then wake up, and Vcore is now at 1.50V.
Restarting the computer (warm or cold start) restores the correct Vcore setting. Also, going into & out of Hibernate mode works properly (e.g. Vcore remains at 1.725).
I suspect this could be a Bios bug, but it could be a HW problem related to #1.
Any help would be greatly appreaciated.
SYSTEM details:
System:
Asus P4C800-E Deluxe, P4 2.6 @3.5G, OCZ PC4000 512MB RAM
2x WD 36G S-ATA in bootable RAID 0 configuration
WD2000 IDE, PlexWriter 52x, ZIP 750
ATI Radeon 9800 pro 128
Case Lian-li PC76 with 8 fans
OS: Windows XP pro