HOW TO FIX A gpu WHICH SHOWS ARTIFACTS

Solution
most artifacting issues are Graphics card based issues, most of the time, it'll never and can't be fixed, you may have to get a new graphics card.

Generally, re-installing the GPU drivers and lowering clock rates doesn't fix it, there is no other way.
cpu : core 2 quad q6600
gpu : msi hd 4850
ram : kingston 4gb ddr3
motherboard : asus p5 g41 t mlx
psu: trust 420w >>>>> http://www.cnet.com/products/trust-power-master-420w-psu-low-noise-big-fan-pw-5250-power-supply-420-watt/specs/
os: win7 ultimate 64bit
thats all i got
 


How old is everything?
 
Do you know anyone who has a graphics card that you could try to see if you still get the errors. That way you can determine whether the GPU is actually the cause or if it is something else like the power supply.
 
I lowered the frequencies but by this process gpu works for only week then again shows artifacts and then again i modded it's bios and it worked for me one week more......