nf7-s rev2 vcore measurements (23 june 2003)
Mobo tray cutout for easy access to the back of the board.
Vcore was set to 1.825v in bios. The CPU was a 2100+ running at 210*11 (2310mhz). Voltage measurements were made initially with the computer in the pchealth bios menu, which showed 1.84vcore. Vcore measurements at inductor outputs were 1.835-1.836v.
In comparison, vcore varied from 1.816-1.819 when measured at various points on the socket.
Here's a sample measurement of inductor output taken in windows in idle mode.
Another measurement at socket input, lever side, taken in windows in idle mode.
Here's a screen capture of mbm 5.33 in idle mode.
Here're some vcore measurements taken on the lever side, after XX minutes YY seconds of prime95 (ver23.4.1), with 1.825v bios setting.
|
|
Vcore lever side, V
|
|
before test started
|
1.825
|
|
|
|
|
1024 fft
|
|
|
00m10s-00m20s
|
1.813-1.815
|
|
00m45s-00m48s
|
1.810
|
|
01m40s-01m48s
|
1.810-1.811
|
|
02m00s-02m20s
|
1.808-1.810
|
|
03m00s-03m10s
|
1.808
|
|
05m00s-05m14s
|
1.807
|
|
06m06s-06m17s
|
1.807
|
|
07m02s-07m20s
|
1.807-1.808
|
|
08m03s-08m22s
|
1.807
|
|
09m10s-08m19s
|
1.809
|
|
10m00s-10m30s
|
1.807-1.808
|
|
12m00s-12m12s
|
1.809
|
|
14m10s-14m20s
|
1.809
|
|
|
|
|
8k fft
|
|
|
15m20s-16m05s
|
1.807-1.810
|
|
23m10s-23m48s
|
1.807-1.810
|
|
|
|
|
10k fft
|
|
|
42m34s-43m08s
|
1.809-1.810
|
|
|
|
|
896k fft
|
|
|
47m15s-47m36s
|
1.808
|
|
|
|
|
test stopped 49m20s
|
1.825
|
|
|
|
During the test period, the lowest vcore reported by mbm was 1.76v, and highest was 1.81v, giving a variation of 2.8% between idle and load. From the above measurements, however, vcore variation was 1% between idle and load.