Question about 3dmark scores

[Dugalle1987]

I had a question about my system, when I overclock the cpu to get the memory to 2000mhz I actually get a worse 3d mark score. I was also wondering if the cpu is bottlenecking the gpu with this setup? Im currently running processor at default 3.2ghz

ASUS Crosshair IV Formula AM3 AMD 890FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard

AMD Phenom II X6 1090T Black Edition Thuban 3.2GHz Socket AM3 125W Six-Core Desktop Processor

G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM DDR3 2000 (PC3 16000)

Western Digital Caviar Black 1TB 7200 RPM SATA 6.0Gb/s 3.5" Internal Hard Drive

Microsoft Windows 7 Professional 64-bit

XFX HD-597A-CNB9 Radeon HD 5970 Black Edition 2GB 512 (256 x 2)-bit GDDR5 PCI Express 2.1 x16 HDCP Ready CrossFireX Support Video Card

 

[Cygnus x-1]

Your score can go down when overclocking because of instabilities. Are you sure the overclock is stable? Are the ram timings and voltage setup properly?

At stock frequency maybe a little bottleneck, but nothing to worry about. Certainly getting into the mid and upper 3ghz will help.