System with DDR3 slower than system with DDR2!!

[funeraldoner]

Hi everyone!

I've upgraded my system with 2x4GB DDR3 G.Skill Ripjaws 1600 Mhz. The problem is: now my system is slower! The XBench and Geekbench are worse than when I put the DDR2 800MHz memory. I've checked and the BIOS recognizes the RAM perfectly so...what's happening? I've tried with only one 4GB module too...

My mobo is GA-P55M-UD2 and processor is Core i7 860, with 10.6.4 OSX.

Geekbench with DDR2 800MHz -> 8500
Geekbench with DDR3 1600 MMhz -> 3500

Help me please!!

+UPDATE+
If i configure the BIOS to get 800Mhz (6.0 Multiplier) with the DDR3 1600Mhz RAM, the result in Geekbench increases!! -> 6661

So, less speed and worse memory and the system goes faster. Why??

 

[eelhead]

Topic moved from Buying Advice to General Tuning.

 

[funeraldoner]

Now i've seen that the processor supports only 1333 and 1066. Now the RAM is in 1333 MHz, the processor multiplier is 22, and the Geekbench result is better, but it's not enough.

Geekbench DDR2 800Mhz -> 8500
Geekbench DDR3 1333Mhz -> 8000!!!!

Why? What can i do?

 

[Lnx2Mac]

http://lnx2mac.blogspot.com/2010/07/opt ... ation.html

 

[funeraldoner]

Yeah! You're the boss! Thank you!!

With the XMP Profile1 thing i can overclock the system and get High scores with the RAM working perfectly at 1600MHz. Now i'm getting 9700. I'm satisfied!