Is it my GPU or GPU Fan?

I've been itching to upgrade my GPU but there's a slight problem I have. GPU-Z shows my temp for my gpu at 46C after boot, which is normal. But then it goes up by 1c by itself every few minutes? And it stops at 56C. This generates alot of heat....Came home from school the other day and my room felt like summer.

I'm worried that if I upgrade my gpu I'm still gonna have this heat issue. I could try replacing the heatsink and fan.. but if the problem still persists then I'm down 50$+

What do you guys think? I took out the fans, heatsinks, cleaned them, repasted, nothing.

5850

 

56c on idle is pretty much normal for a gpu.
its 46c after boot because gpu is room temp when laptop is off, but it warms up while you boot windows.
it goes up by 1c as its managing all the aero/windows graphics.
it stops at 56c once it runs out of things to do while supporting aero.

have you measured the temps when gpu is on load? it should go way up to 80s, which is normal

 

That idle is too high, but what is your ambient temp? As a reference, my 5850m idle between 39-44c. Have you dusted out your laptop and/or done a repaste? If not do that before anything else.

 

mid 50's idle is about right.

 

It's ok, we consider high anything above 90c.