That you get somewhere like a half FPS in the CPU tests is normal. I got a CPU score of 761 with an P4 Northwood overclocked at 3.6GHz. The FPS in the CPU tests were 0.235 and 0.394. This is perfectly normal.http://service.futuremark.com/compare?3dm06=152965
An Dual Core Opteron 170 at 2.88GHz scores 2,225 CPU score (3DMark06 loves dual core), and the FPS were 0.701 and 1.130 for the CPU testshttp://service.futuremark.com/compare?3dm06=346565
Finally, my current Core 2 Duo at 3.51GHz pushes 3,103 with FPS of 0.980 and 1.572.http://service.futuremark.com/compare?3dm06=478537
It depends on your budget. You're upgrading your motherboard and CPU.. correct? What is your total budget? For good performance at a decent price, I would pick up a DFI LP UT nF4 SLI-D Socket 939
for $142.99 and an X2 3800+
for $152.00 and you're done for around $300.
However, if you are willing to spend about double, then Core 2 Duo comes into the picture, requiring a RAM upgrade also. In this case, I'd suggest the GIGABYTE GA-965P-DS3
for $149.99, An E6300
for $183.00 and some good DDR2 800 RAM, like this G.Skill
kit for $269.00 ( I know, RAM is expensive). That totals $601.99.
IF you can only afford the CPU now, pick up that X2 3800+