video card totally un-overclockable?

[SoAndSo]

I have an issue with my Sapphire dual slot 4850. The issue is my card is 100% un-overclockable. Not even a little bit.

These are my cards base stats.
I am posting this as i am frustrated quite a bit, Ive just a hard lockup by increasing the memory to 1003MHz, which is nothing. it doesnt matter if i have the fan at 100% or 20%. it will ALWAYS lock up, doesnt matter if i touch the memory or the gpu clock. Even one notch to the right will end in a lock up WHEN IM BROWSING, no 3d work, just desktop/internet stuff
Its not a big deal as i am 100% happy with the card, i just assumed it would OC a tad, but it wont. Would you say the card was faulty? or i just got a dud OCer. Im fine running the card at its base stats, i was just trying to follow the [H]ard way of life by OCing everything possible Has anyone else had this with any card? I just think its weird that i cant OC it even a widdle biddle teensy weensy bit without a hard lockup.

 

[Juggafat]

It's possible that you got a card that barely passed the clock testing. I would try to overclock it rivatuner just to make sure CCC isnt being stupid. If that doesnt work maybe try a bios flash?

 

[Nenu]

As Juggafat suggested, try Rivatuner.

Failing that, can you borrow another good quality PSU with enough power for your system?
Its possible your PSU is struggling/faulty.

Before doing that, unplug the card and its power connectors and reseat them well, to be sure.

If the PSU/power connections are not the problem, you can get the Accelero S1 v2 cooler pretty cheap and it is an amazing cooler.
This should liberate your card.