Random Crashes, no BSOD

I am a CounterStrike: Source fiend and the last few days my computer has randomly rebooted, here is my latest minidump if anybody can help me figure out what is causing my reboots please post. Thank you in advance.

Specs:
AMD XP 3200+
1 Gig crucial pc2700 memory (normally oc but i un-oc because of crashes no help though)
ATI Radeon 9800 Pro (same as ram)
Albatron KX18S Pro2 mobo
80 gig maxtor 7200 RPM 2 meg cache
200 gig Seagate 7200 RPM 8 meg cache
52x Lite-On combo drive
Lite-On DVD+-RW (dual layer)
integrated sound
400 watt rosewill psu

0000: 53 79 73 74 65 6d 20 45 System E
0008: 72 72 6f 72 20 20 45 72 rror Er
0010: 72 6f 72 20 63 6f 64 65 ror code
0018: 20 31 30 30 30 30 30 37 1000007
0020: 66 20 20 50 61 72 61 6d f Param
0028: 65 74 65 72 73 20 30 30 eters 00
0030: 30 30 30 30 30 38 2c 20 000008,
0038: 38 30 30 34 32 30 30 30 80042000
0040: 2c 20 30 30 30 30 30 30 , 000000
0048: 30 30 2c 20 30 30 30 30 00, 0000
0050: 30 30 30 30 0000

I still haven't figured out what the problem is, does anybody have an idea whats going on with my machine?

Hi AudImage,

00000008 80042000 00000000 00000000

Probably cause
1. Faulty ram
2. Faulty m/b
3. Faulty video card

Suggestion
1. Run memtest to stress test the ram.
2. Attach 5 to 6 minidumps here.