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DDR2 PC2 8500 1066mhz read as PC2 6400 800mhz

Last response: in Memory
May 2, 2011 6:16:06 PM

Hi Guys

This has been bothering me for a while, and i thought a different motherboard would solve the issue but it hasnt.

The Problem:

I have 8gb (4 x 2gb) of Kingston Hyperx 1066mhz DDR2 240 pin ( in my ASUS P5Q Pro Turbo motherboard.

When i run PC Wizard, or any similar application, i am told that my RAM is running at 800mhz as PC2 6400. I have entered bios and changed the RAM settings to PC2 8500, changed the voltage to 2.2v and changed the latencies to 5-5-5-15, as reccommended by Kingston. The RAM is 100% compatible with my motherboard, i checked that before buying, but it is not being read at the correct speed. I had the same issue with an older motherboard (ASUS P5QLD Pro), but the ram was not 100% compatible with the mobo, one of the reasons why i changed it.

Anyone know how to sort this out?

W7 Ultimate x 64
4 x 2gb DDR2 Kingston Hyperx @ 1066mhz
Intel Core 2 Quad Q6600 @ 2.4ghz
Asus P5Q Pro Turbo motherboard
Gainward GeForce 250 GTS @ 1gb.
2 x seagate barracuda 500gb @ 7200rpm
2 x seagate barracuda 1tb@ 7200rpm
600w OCZ Stealth X Stream 2 PSU.



MOBO and RAM Info:
a c 347 } Memory
a c 717 V Motherboard
May 2, 2011 6:30:37 PM

If you already set the CAS Timings then ADD DRAM Frequency -> DDR2-1066 MHz

Use CPU-Z then multiply the DRAM Frequency X 2; most Apps report I/O bus clock and NOT Data rate.
May 2, 2011 6:52:59 PM

some motherboards or cpu memory controlers will only work at 800 mhz when the 4 memory slots are full try just 2
see if it runs at 1066