Horrible pc performance and passmark score

[Airamis77]

I've been having trouble with this pc forever and I can't figure out why. It does ok at simple web browsing, but attempt to play any game or anything with flash on it and it slows to a crawl. I ran the PassMark test and got a terrible score. The only thing I can think of is I either have some voltages set wrong in my BIOS or its the cheapo power supply. Here's my log

Benchmark Results

Test Name: This Computer
CPU - Integer Math: 44.3
CPU - Floating Point Math: 256.3
CPU - Find Prime Numbers: 60.3
CPU - Multimedia Instructions: 1.7
CPU - Compression: 502.5
CPU - Encryption: 2.1
CPU - Physics: 21.2
CPU - String Sorting: 315.5
Graphics 2D - Solid Vectors: 0.3
Graphics 2D - Transparent Vectors: 0.3
Graphics 2D - Complex Vectors: 87.9
Graphics 2D - Fonts and Text: 21.0
Graphics 2D - Windows Interface: 12.0
Graphics 2D - Image Filters: 46.0
2D Graphics - Image Rendering: 38.5
Graphics 3D - Simple: 479.4
Graphics 3D - Medium: 276.1
Graphics 3D - Complex: 10.3
Graphics 3D - DirectX 10: 9.1
Memory - Allocate Small Block: 362.5
Memory - Read Cached: 325.3
Memory - Read Uncached: 132.3
Memory - Write: 147.6
Memory - Large RAM: 71.6
Disk - Sequential Read: 37.0
Disk - Sequential Write: 48.7
Disk - Random Seek + RW: 3.1
CPU Mark: 379.0
2D Graphics Mark: 76.7
Memory Mark: 76.1
Disk Mark: 321.4
3D Graphics Mark: 502.5
PassMark Rating: 203.1

System information: This Computer
CPU Manufacturer: AuthenticAMD
Number of CPU: 1
Cores per CPU: 2
CPU Type: AMD Athlon 64 X2 Dual Core 6000+
CPU Speed: 3014.1 MHz
Cache size: 1024KB
O/S: Windows 7 (32-bit)
Total RAM: 2047.3 MB.
Available RAM: 1406.6 MB.
Video settings: 1680x1050x32
Video driver:
DESCRIPTION: NVIDIA GeForce 9800 GT
MANUFACTURER: NVIDIA
BIOS: Version 62.92.52.0.51
DATE: 5-14-2009
Drive Letter: C
Total Disk Space: 128.0 GBytes
Cluster Size: 4.0 KBytes
File system: NTFS
Motherboard: ASUS M2n-MX SE+

Also here is my voltages from PC Wizard

CPU 1.39v
+3.3v - 3.33v
+5v - 6.85v
+12v - 12.54v

I have run out of ideas as to what is causing this horrible performance. Any help would save me from pulling all my hair out!!

[David (PassMark)]

Yes the result is awful. The CPUMark is around 25% of what it should be.

Check the cooling and make sure the CPU is not overheating.

Check there are not too many cruddy background tasks running on the PC, if desperate do a clean install of Windows.

See also this post.
Causes and Solutions for a slow PC

[Airamis77]

I had this problem with windows XP on this machine and just did a fresh install of Windows 7 2 days ago, nothing has changed with the clean install. I've cleaned out the pc and checked all the fans, everything is in working order. All my temp's seem to be in range.

[David (PassMark)]

Maybe motherboard device drivers? Could see if there was new BIOS available to flash.

If you had some spare hardware you could try swapping out the CPU & RAM just as an experiment.