Be thankful windows is not detecting that card and its not clocking up, you don't have a 500W PSU you have a 200W unit masquarding as one....
My god what a cheap POS unit. You are running the risk of exploding your system as a radeon 5770 itself has a 100~110W TDP depending on what your running which is over half what that fake POS unit puts out.
So with a 50W CPU , and a 100W Video card, and a fake POS unit thats no where near 500W (lol I swear it should be against the law to advertise a PSU that way) You are truely playing with fire.
What you have there my friend is a huge ticking time bomb.
The other latest news as well, see if there is a bios update for that board , as old Nvidia chipsets and Old Intel chipsets had issue's with the 5k series cards for some odd reason.
And just as an example
Here is a real 400W PSU
And a real 500W PSU.
(notice these are corsair lower end offerings but over 80% of the power is avaible on the 12V rail. The one that powers your major components. There top offerings are close to 100%)
I5 3570K@4~5.0ghz: Gigabyte GA-Z77X-UD3H:Corsair Hydro H70w/Delta 240CFM Fan: 16GB Corsair Vengeance DDR-3 1600: 2 XFX Radeon 7950 @ 1150/1575 : Corsair AX 860 PSU: x2 WD Black 1TB HDD's: 90GB OCZ Agility 3:CL X-FI:Corsair 500R Arctic White Edition:3 22inch Asus monitors Eyefinity @ 5294x 1050(bezel comp) : Alienware Tact-X Keyboard: Naga Razer gaming mouse:Corsair Vengance 1500 Headset .
10:47 PM by