The results of 3D Graphics Mark are inconsistent.

[redZeng]

Hello,

I try to test my PC with 3D Graphics Mark. First, I execute 3D Graphics through script, content as follow:
----------------------------------
RUN G3D_ALL
EXPORTTEXTF "3D4_1.txt"
SLEEP 20000
RUN G3D_ALL
EXPORTTEXTF "3D4_2.txt"
SLEEP 20000
RUN G3D_ALL
EXPORTTEXTF "3D4_3.txt"
SLEEP 20000
RUN G3D_ALL
EXPORTTEXTF "3D4_4.txt"
SLEEP 20000
RUN G3D_ALL
EXPORTTEXTF "3D4_5.txt"
----------------------------------
Result as follow:
----------------------------------
3D4_1.txt
3D Graphics Mark: 134.5
Graphics 3D - Simple: 202.2
Graphics 3D - Medium: 47.4
Graphics 3D - Complex: 8.4
3D4_2.txt
3D Graphics Mark: 65.7
Graphics 3D - Simple: 49.2
Graphics 3D - Medium: 27.4
Graphics 3D - Complex: 8.4
3D4_3.txt
3D Graphics Mark: 134.6
Graphics 3D - Simple: 202.3
Graphics 3D - Medium: 47.4
Graphics 3D - Complex: 8.4
3D4_4.txt
3D Graphics Mark: 65.7
Graphics 3D - Simple: 49.2
Graphics 3D - Medium: 27.4
Graphics 3D - Complex: 8.4
3D4_5.txt
3D Graphics Mark: 134.5
Graphics 3D - Simple: 202.2
Graphics 3D - Medium: 47.4
Graphics 3D - Complex: 8.4
----------------------------------
When "even" test, these results are lower then results of odd test.

But then, I execute 3D Graphics through manual control, the phenomenon not happen.
Why this phenomenon occurs? Thanks.

------------------------------------------------------------------
System information: This Computer
CPU Manufacturer: GenuineIntel
Number of CPU: 1
Cores per CPU: 2
CPU Type: Intel Core2 Duo P9300 @ 2.26GHz
CPU Speed: 2261.0 MHz
Cache size: 6144KB
O/S: Windows XP (32-bit)
Total RAM: 1980.1 MB.
Available RAM: 1633.3 MB.
Video settings: 1440x900x32
Video driver:
DESCRIPTION: Mobile Intel(R) 4 Series Express Chipset Family
MANUFACTURER: Intel Corporation
BIOS: Intel Video BIOS
DATE: 2-20-2009
Drive Letter: C
Total Disk Space: 3.7 GBytes
Cluster Size: 4.0 KBytes
File system: NTFS

[David (PassMark)]

There are a few results around 47 & 49 frames /sec.
I am wondering if you are running your monitor at 50Hz?
And maybe you are being frame rate limited by the device driver. Why this happening only some of the time I don't know.

[redZeng]

Hi,
My monitor run at 60Hz.
This phenomenon only happen when using script about 3D Graphics test.
Other CPU, 2D Graphics and Memory have not this phenomenon.

Why this happening only some (even time) of the time?
Result of odd time test is similar to executing 3D Graphics through manual control.
(Simple: 202 frames /sec, Medium: 47 frames /sec, Complex: 8 frames /sec)

Thanks for your concern.

[Michael (Passmark)]

We're unable to reproduce this behaviour here using your script. Likely this is something that is specific to your machine. For example your PC may be periodically entering some sort of low performancer power saving state or overheating.