Can a 320W PSU handle the HD6750?

If I were you, I would invest in a new PSU because 320 W. might be a bit underpowered. You can calulate your exact powerneeds with this:

http://extreme.outervision.com/PSUEngine

The brand doesn't really make a difference in this situation. You are running on minimum power. HP uses PSUs to power the stock build adding any extra hardware and especially a GPU will probably call for a PSU upgrade.
You could always give it a try but I would suggest picking up a new PSU.

But I can't upgrade my PSU right now...  
It will still support the HD6670, isn't it?

toast

might be a risky situation get 400w.

But in this thread you said HD6670 would be fine?  

it would be a borderline case .
as such i have had a bad experience with delta electronics psus
its upto you to take the risk
goodluck!

So... if I take the risk, the worst case would be "a dead PSU", isn't it?
I mean, will it damage any other component(s) in the CPU?

well, you're able to run that gpu with even 280watts but REMEMBER (280w) only draw by a quality PSU. corsair,antec,XFX etc.

suppose if you have a PSU with 500w and a bad quality like (deer, powmax demon etc) it wouldn't draw exactly 500w continusly it should draw about 300w how cheap.

Is Delta Electronics not a good brand?

it is good for such an old systems like PENTIUM 4 series, dangerous for high-fi systems.

Depends on what hardware you have in your system, a 6670 can only use 75w max due to not having an external PCIE connector:


Though, I suggest getting a 7750, it uses the same power and is around the performance of a 6770

My personal opinion on this is, it might work its just a question of how long.

Maybe take a pic of the side of the psu label so we can see how much power it can really output? Most OEM (like dells, gateways, etc power supplies) manufacturers lie on the labels and put down whatever they feel like.

get a minimum 400watt psu.
It will be better for you.

nope, A 300w quality PSU will do the job even it will handle the gtx 560ti.

mouse24, this is the side label of my PSU:

Yup, shouldn't be a problem. Its a UL certified Delta unit (I don't really know what a UL cert does or is for...)

Have you looked at 7750s? they are about the same price as 6670 and perform twice as well.

Thanksss...
Ill look at the 7750s also... But will my PSU support it?

Yup, it takes about the same amount of power.

Okkk! Thanks!  
In fact, 7750 takes lesser power than the 6670...