Quote Originally Posted by KBD View Post
BTW, I already have copper sinks on the VRMs and they are still hot (like 76-78C load with HR-03 GT), that Zalman sink will not be as effective since its aluminum.
Yes but what I've linked you to, is quite a big heatsink, with a big heat dissipation area and also you can mount it by using thermal paste, instead of the usual double sided sticky tape, that normal vrm/ram little heatsinks have. I assume you have the small heatsinks that came with your hr-03 gt.


Quote Originally Posted by KBD View Post

Those results are not bad, in fact with the stock cooler my card did only slightly better reaching 830Mhz on the core with the same voltage. Remember that 4870 cards are not the greatest overclockers and even with an increase in voltage dont achieve very high clocks. As we have seen in this thread there are exceptions to this and some cards do perform very well but thats all they are exceptions. I've read of cards that couldn't even break the 800mhz barrier on stock voltage so the results you have are actually OK.
Oh and my card doesn't do even 3900 mhz stable on the gddr5. It's "stuck" at 3800mhz.My ram is totally unoverclockable.