Is this 3D Mark 06 Score OK ?

Not bad, give that 620 some more megahurtz and your score will go up quite a bit.
Run with default settings. I noticed you changed the resolution which gives you different results than everyone else so its harder to compare.

check out hwbot.org and compare it to other cards to get a good idea

It's not bad but I think it would be better in Win XP the 7 but not sure. I do 15866 with the same card but my CPU is OC'd so I think that where the difference is. OC you cpu and it will get better!!

Change resolution back to default.

cpu bottleneck for now, since scores didn't really change the CPU is lagging behind.

Definitely your CPU. I get just over 12K with only an 8800GT. The real question you should ask is "are my game framerates OK?" As long as you can play what you need to, I don't put much stock into benchmark scores.

Crysis DX 10 Max 1440x960 40-50 Fps . I wont oc my CPU , and my GPU for now , cuz i have a mid quality PSU . Next month i will buy a 850 W Chieftech CFT-850G-DF PSU , and an Artic Coller Freezer XTREME rev2.0 cpu cooler . And after that .... SOME OC'ing