After the Inital start it plays fine then it stops locks up no error messages causin me to restart now i run my dx diag and it freezes on the Direct 3d Test even gone to run 3DMARK 03 n it froze on that test n when i ran it B4 1st time no lockups freezes or errors

AMD Athlon xp 2200 1.8GHZ
Gainward 6600 GT 128MB
1GB RAM
Direct X 9C
XP HOME SP 2
550 Power Supply

lookin on the spec of the game ime over it
now i feel it has afftected my windows in some way i was on the ms site about to get the dx 9c and it froze for xp shouldn't do this i dont understand this problem
ive also go the latest patch on for doom but for now ive uninstalled the game till i can sort it

i have all ususal spyware firewall etc on
5 cooling fans
its only just a fresh install of xp aswell

Did you forget to connect ur 4-pin connect from your power supply to your video card? Perhaps try to lower ur AGP transfer mode all the way down to 1X... And maybe turn off fast write?

TMP-Man

Asus A7V classic rev 1.05
Athlon XP 2100+ @ 129x17 = 2195Mhz 1.81v
768MB PC133 RAM @ 129Mhz 2-2-2
40GB 540RPM + 120GB 7200RPM HD
128MB Radeon 9500 mod 9700 @ 300/300

Well, Doom 3 as far as i remember is a fairly new game. Your system looks a bit outdated. I mean a 1.8Ghz cpu is pretty slow for today's games. You do have DX9.0 which is a good thing. But you may have a problem with your graphics card (128mb) with the games nowadays, a 256 is good bet.

Doom 3 System Requirements

Minimum Specifications
A 1.5-gigahertz Intel Pentium 4 chip or AMD Athlon 1500.
384 megabytes of memory.
Two gigabytes of hard drive space.
An nVidia GeForce 3 graphics card or better; or an ATI Technologies 8500 or better.

Recommended Specifications
2Ghz CPU or AMD 2500+
512 megabytes of memory.
Two gigabytes of hard drive space.
Radeon 9700 or an nVidia GeForce4 ti4600 graphics card or better.
5.1 surround sound audio

Worry Free Specifications
3 Ghz Intel Pentium 4 chip or AMD Athlon 64 3000+.
1 gigabyte of memory.
Two gigabytes of hard drive space.
An nVidia 6800 graphics card or an ATI X800XT
6.1 surround sound audio

If at first you dont succeed,.....quit

Get the newest drivers from Guru3d.com (I mean the Beta ones) and also (this is very important) install your AGP driver for your motherboard before the 6600GT drivers. You have to completely remove any existing drivers first.

Also, your RAM could be the problem, try reducing it's clock speed

Also, install RivaTuner and begin the monitoring utility, this will log your GPU temp and speed.
Make sure that your clock changes from 300 to 500 when you start a game "TMP-Man" is right and you need to check your 4-pin connector.
Also, the 6600gt has on-chip temp monitoring, mine runs happily at 58, and gets sad around 65.

what can be causing my bencmark to lock up is this all to do with the grhaphics Temperature/speed ive got the gainward xpert tool

.the power cable is connetced to the card

.what does the fast write do seen it in the bios but never understud what it does i imagines its sometthing to do with how fast the data is transfered

the full detail of my system

2 Hard Disks BOTH 8MB CACHE 7200RPM
2 CD Drives 1 DVD/RW 1 DVD ROM
4 Case Fans
The 6600 GT
2 512 STICKS DDR RAM

Will i see much difference with the agp turned down to 1x

Weird you should ask, I have used AGP 1x before and not seen a difference on my old Ti4200 8x on 3dMark2001 (good old days), but that could have been a fluke.

Your fan hasn't failed on your GPU has it?

nope not that ive seen

ive put my old fx5200 in to see what doom3 says when i put that in and all be it on low settings it played fine no lockups or nothin my bro seems to think the reason that it locked up b4 was due to the 6600gt card being in securley but ime in 2 minds about it