XFX GeForce 6800 XTreme 256MB DDR3
3DMark 2005 Pro
1	Single GPU	Core Clock (MHz)	375	OC	AA	3346 3D Marks
		Memory Clock (GHz)	1.00	Yes	4x
2	Single GPU	Core Clock (MHz)	375	OC	AA	3699 3D Marks
		Memory Clock (GHz)	1.00	Yes	None
3	Single GPU	Core Clock (MHz)	385	OC	AA	3814 3D Marks
		Memory Clock (GHz)	1.05	Yes	None
4	SLi	Core Clock (MHz)	375	OC	AA	6254 3D Marks 86.91%
		Memory Clock (GHz)	1.00	Yes	4x
5	SLi	Core Clock (MHz)	375	OC	AA	6821 3D Marks 84.40%
		Memory Clock (GHz)	1.00	Yes	None
6	SLi	Core Clock (MHz)	385	OC	AA	7017 3D Marks 83.98%
		Memory Clock (GHz)	1.00	Yes	None
3DMark 2006 Pro
7	SLi	Core Clock (MHz)	350 (stock)	OC	AA	2991 3D Marks
		Memory Clock (GHz)	1.00	No	None
8	SLi	Core Clock (MHz)	385	OC	AA	3222 3D Marks
		Memory Clock (GHz)	1.05	Yes	None
Notes / Observations
3DMark 2005 Pro default benchmarks used (unless otherwise noted). nVidia 84.21 drivers used (9X.xx drivers are unstable at the time of this benchmark publication. When in Sli mode, complete freeze-up when attempting to overclock to 400/1000 settings in the nVidia control panel. Freez-ups occur about half-way through the benchmark using 390MHz and 1GHz memory speed or higher.

SLi Works

Looking at the above 3DMark tests, we observe an 84% increase or higher when adding a second card. This is great news for anyone looking to go SLi with them.

In the next section, we'll take a look at game-specific overclocking...