In reference to this thread here
, I'm going to relate my own experiences with modding and overclocking the 6800 vanilla. Like in the review, I will be using the XFX 6800
Specs for the 6800 differ from the GT and Ultra only in a few areas. The GT and Ultra both use GDDR3 memory clocked over 1ghz, a 16 pixel pipeline and 6 vertex pipeline core clocked at 350mhz for GT and 400mhz for Ultra, 256-bit memory interface, and pretty extensive cooling.
Now, the vanilla 6800 has regular DDR memory clocked at 700mhz, only 12 pixel pipelines and 5 vertex pipelines (remaining pipes are there, only locked), core at 325mhz, full 256-bit memory interface, and (at least on my card) only mediocre cooling.
The last quality will be fixed easily by adding a NV Silencer 5
by the famed Arctic Cooling. The NV Silencer 5 should easily give me just as good cooling (if not better due to the exhaust style cooler) as the cooling found on any 6800GT or Ultra.
Now, overclocking basics. The higher the voltage, the faster transistors can open and close (meaning higher frequencies). But, the higher the voltage, the more heat there is (hence the NV Silencer). Not many people will have this option, but my motherboard (IC7-Max3) has extensive system settings in the BIOS, including AGP voltage. Options include 1.5v (standard AGP voltage), 1.55v, 1.6v, and 1.65v. When I get into overclocking, I am going to increase the voltage to 1.65v to achieve a maximum OC.
I have only just received the card and Silencer today, and will be continuing this later tonight. Stay tuned.
Disclaimer: Overclocking/unlocking your card may render it useless or otherwise damaged. This is not the fault of the card's maker, this is not the fault of me, this is not the fault of Motherboards.org, this is not the fault of the dude living next door. It's your own dang fault for blowing it up, so you accept all legal responsibility if you decide to proceed with this mod.