I have 2 2GB sticks of memory that are PC8500 DDR2 memory, but the memory speed is picked up by utilities as PC6400. Below is info from SiSoftSandra. CPU-Z displays the same summary on memory speed.

Logical/Chipset Memory Banks
Bank 0 : 1GB DDR2 5-7-7-24 4-31-9-5 2T
Bank 1 : 1GB DDR2 5-7-7-24 4-31-9-5 2T
Bank 4 : 1GB DDR2 5-7-7-24 4-31-9-5 2T
Bank 5 : 1GB DDR2 5-7-7-24 4-31-9-5 2T
Maximum Installable Memory : 8GB
Supported Memory Types : ECC DDR2 DDR3
Channels : 2
Memory Bus Speed : 2x 533MHz (1.07GHz)
Maximum Memory Speed : 2x 800MHz (1.60GHz)
Multiplier : 8/5x
Width : 64-bit
Memory Controller in Processor : No
Refresh Rate : 7.80Ás
Power Save Mode : No
Fixed Hole Present : No
Maximum Memory Bus Bandwidth : 16.66GB/s


Memory Module 1
Model : CM2X2048-8500C5
Extended Information : mVN
Type : 2GB DIMM DDR2
Technology : 16x(128Mx8)
Speed : PC2-6400U DDR2-400
Standard Timings : 5.0-5-5-18 3-23-6-3
Version : 1.2
Date of Manufacture : Thursday, May 14, 2009
Memory DC Line : 1.80V
Set Timing @ 400MHz : 5.0-5-5-18 3-23-6-3
Set Timing @ 267MHz : 4.0-3-3-12 2-15-4-2
Enhanced Performance Profiles : Yes
Profile @ 533MHz: Optimal : 5-5-5-15 X-22-32-X 2T 2.1V

Memory Module 2 etc...


Does something have to be set to tell the MOBO that I am running PC8500 memory? I have not changed any settings in BIOS related to speed/oc/timing.

Thanks for any help.