Upgrade advice please......

[RUMBUGGER]

I've been away from the computer scene for some time now and need some upgrade advice. my system is as follows,

Asus P4B266 Motherboard.
Pentium 4 1.6Ghz Northwood cpu running at 2.2Ghz.
Asus V8440 Graphics card.
1Gig Geil Memory.

Needless to say gaming performance with games such as Quake 4 and Doom 3 is pretty poor! i have a budget in the region of £200, what would be a cost effect boost? buy one of the following...

Nvidea 6600GT?
PowerColor ATI Radeon X850 XT 256MB?
Sapphire ATI Radeon X800 GTO 256MB ?
XFX GeForce 6800 GS Extreme XT Edition 256MB?
BFG GeForce 7800 GS OC 256MB?

I read somewhere that certain Radion cards can have their bios "tweaked" to improve performance, is this a viable option?

Thanks in advance guys!

 

[xtox]

You might want to save a little more and go with a complete upgrade. Putting a fancy paintjob on a crap car still aint gunna make it go any faster.

 

[RUMBUGGER]

You might want to save a little more and go with a complete upgrade. Putting a fancy paintjob on a crap car still aint gunna make it go any faster.

Point taken, but surely a more "Modern" card will give a substantial boost? As i have already stated my budget is limited, if i had the spare cash then i would build a system from scratch.

 

[Hash_Immutable_1337x]

If you absolutely must upgrade, then I wouldn't invest no more than an X800GTO or a 6800GS.. but no more..

As someone mentioned, it would be best to just save up for a complete overhaul.