AquaMark 2.3	Source: Massive Development

AquaMark is another DirectX 8 benchmark. Vertex shaders provide a huge image quality and speed boost for compatible cards. The Default test has 24 MB worth of textures.

AquaMark
1027x768	FPS	Ranking
MSI RX800XT-VTD256E	143.3
ATi Radeon X800 XL	141.9
Gigabyte GV-RX80L256V	142.8
PowerColor X700 Pro	115.2
PowerColor Bravo X700	93.7
MSI NX6800GT-T2D256E	147.5
Albatron Trinity PC6600	92.5
Albatron Trinity PC6600U	119.8
Asus Extreme N6600TOP/TD/128M/A	126.1
MSI NX6600GT-TD128 AGP	123.2
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	131
Gigabyte GV-3D1 (SLI Mode 500/1120)	130
MSI NX6600GT-TD128E (Single)	134.1
MSI NX6600GT-TD128E (SLI Mode)	130.5
MSI RX800XL-VT2D256E	139.8
MSI RX800XL-VT2D256E (421/534)	143.2
1280x1024	FPS	Ranking
MSI RX800XT-VTD256E	131.8
ATi Radeon X800 XL	125.3
Gigabyte GV-RX80L256V	127.4
PowerColor X700 Pro	81.1
PowerColor Bravo X700	63
MSI NX6800GT-T2D256E	134.1
Albatron Trinity PC6600	61.4
Albatron Trinity PC6600U	84.1
Asus Extreme N6600TOP/TD/128M/A	89.6
MSI NX6600GT-TD128 AGP	93.7
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	102.7
Gigabyte GV-3D1 (SLI Mode 500/1120)	123.3
MSI NX6600GT-TD128E (Single)	104.5
MSI NX6600GT-TD128E (SLI Mode)	120
MSI RX800XL-VT2D256E	124.4
MSI RX800XL-VT2D256E (421/534)	128.5
1600x1200	FPS	Ranking
MSI RX800XT-VTD256E	115.4
ATi Radeon X800 XL	102.6
Gigabyte GV-RX80L256V	103.2
PowerColor X700 Pro	55.7
PowerColor Bravo X700	42.5
MSI NX6800GT-T2D256E	112
Albatron Trinity PC6600	45.3
Albatron Trinity PC6600U	60.8
Asus Extreme N6600TOP/TD/128M/A	65.9
MSI NX6600GT-TD128 AGP	70.2
Gigabyte GV-3D1 (Single GPU Mode 500/1120)	78.3
Gigabyte GV-3D1 (SLI Mode 500/1120)	114
MSI NX6600GT-TD128E (Single)	77.2
MSI NX6600GT-TD128E (SLI Mode)	112.7
MSI RX800XL-VT2D256E	102.6
MSI RX800XL-VT2D256E (421/534)	107.9

Again we see the MSI RX800XL-VT2D256E performing the same as other cards with the same X800XL GPU, and again overclocking seems practically irrelevant