Futuremark 3DMark05 1.2.0	Source: FutureMark

3DMark05 is best suited for the latest generation of DirectX9.0 graphics cards. It is the first benchmark to require a DirectX9.0 compliant hardware with support for Pixel Shaders 2.0 or higher! By combining high quality 3D tests, CPU tests, feature tests, image quality tools, and much more, 3DMark05 is a premium benchmark for evaluating the latest generation of gaming hardware.

FutureMark 3DMark05 1.2.0
Overall:	Points	Ranking
ASRock AM2V890-VSTA (K8T890 200/800 A64 5000+)	7896
Albatron KM51PV-AM2 (GF6150 200/800 A64 5000+)	7908
MSI K9N SLI Platinum (NF 570 SLI 200/800 A64 5000+)	7866
Asus M2-CROSSHAIR (NF 590 SLI 200/800 A64 5000+)	7859
Foxconn 975X7AA-8EKRS2H (975X 200/667 PD 840)	7408
MSI P4N Diamond (NF4 SLI 200/800 PD 840)	7866
Biostar TForce P965 Deluxe (P965 200/800 PD 840)	7661
Biostar TForce P965 Deluxe (P965 200/800 Core 2 Duo)	8021
Gigabyte GA-965P-DS3 (P965 200/800 Core 2 Duo)	8046
Foxconn P9657AA-8KS2H (P965 200/800 Core 2 Duo)	8034
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo Onboard Video)	752
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo GeForce 7800GTX)	8034
Epox 5P945 Pro (945P 200/667 Core 2 Duo)	8014
CPU:	Points	Ranking
ASRock AM2V890-VSTA (K8T890 200/800 A64 5000+)	6621
Albatron KM51PV-AM2 (GF6150 200/800 A64 5000+)	6718
MSI K9N SLI Platinum (NF 570 SLI 200/800 A64 5000+)	6513
Asus M2-CROSSHAIR (NF 590 SLI 200/800 A64 5000+)	6876
Foxconn 975X7AA-8EKRS2H (975X 200/667 PD 840)	5904
MSI P4N Diamond (NF4 SLI 200/800 PD 840)	6513
Biostar TForce P965 Deluxe (P965 200/800 PD 840)	6508
Biostar TForce P965 Deluxe (P965 200/800 Core 2 Duo)	9499
Gigabyte GA-965P-DS3 (P965 200/800 Core 2 Duo)	9844
Foxconn P9657AA-8KS2H (P965 200/800 Core 2 Duo)	9726
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo Onboard Video)	5853
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo GeForce 7800GTX)	9410
Epox 5P945 Pro (945P 200/667 Core 2 Duo)	9111

3DMark05's overall score is not affected by the lower operating memory, however the CPU score definitely is.

Futuremark 3DMark06 1.0.2	Source: FutureMark

3DMark06 is the worldwide standard in advanced 3D game performance benchmarking. A fundamental tool for every company in the PC industry as well as PC users and gamers, 3DMark06 uses advanced real-time 3D game workloads to measure PC performance using a suite of DirectX 9 3D graphics tests, CPU tests, and 3D feature tests. 3DMark06 tests include all new HDR/SM3.0 graphics tests, SM2.0 graphics tests, AI and physics driven single and multiple cores or processor CPU tests and a collection of comprehensive feature tests to reliably measure next generation gaming performance today.

Futuremark 3DMark06 1.0.2
Overall:	Points	Ranking
ASRock AM2V890-VSTA (K8T890 200/800 A64 5000+)	4442
Albatron KM51PV-AM2 (GF6150 200/800 A64 5000+)	4450
MSI K9N SLI Platinum (NF 570 SLI 200/800 A64 5000+)	4437
Asus M2-CROSSHAIR (NF 590 SLI 200/800 A64 5000+)	4446
Foxconn 975X7AA-8EKRS2H (975X 200/667 PD 840)	4212
MSI P4N Diamond (NF4 SLI 200/800 PD 840)	4437
Biostar TForce P965 Deluxe (P965 200/800 PD 840)	4374
Biostar TForce P965 Deluxe (P965 200/800 Core 2 Duo)	4494
Gigabyte GA-965P-DS3 (P965 200/800 Core 2 Duo)	4488
Foxconn P9657AA-8KS2H (P965 200/800 Core 2 Duo)	4462
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo Onboard Video)	202
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo GeForce 7800GTX)	4484
Epox 5P945 Pro (945P 200/667 Core 2 Duo)	4477
CPU:	Points	Ranking
ASRock AM2V890-VSTA (K8T890 200/800 A64 5000+)	1960
Albatron KM51PV-AM2 (GF6150 200/800 A64 5000+)	1971
MSI K9N SLI Platinum (NF 570 SLI 200/800 A64 5000+)	1936
Asus M2-CROSSHAIR (NF 590 SLI 200/800 A64 5000+)	1959
Foxconn 975X7AA-8EKRS2H (975X 200/667 PD 840)	1685
MSI P4N Diamond (NF4 SLI 200/800 PD 840)	1936
Biostar TForce P965 Deluxe (P965 200/800 PD 840)	1641
Biostar TForce P965 Deluxe (P965 200/800 Core 2 Duo)	2130
Gigabyte GA-965P-DS3 (P965 200/800 Core 2 Duo)	2094
Foxconn P9657AA-8KS2H (P965 200/800 Core 2 Duo)	2110
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo Onboard Video)	2058
Gigabyte GA-945GM-S2 (945G 200/667 Core 2 Duo GeForce 7800GTX)	2068
Epox 5P945 Pro (945P 200/667 Core 2 Duo)	2076

Things are much closer overall here in 3DMark06 and memory bandwidth plays less of a role. Let's see what happens to real games....