ASUS P5B & KINGSTON KHX6400D2/1G HYPERX PC6400 800 recognised as PC2-5300!
Hello,
I recently bought a new Mother Board (ASUS P5B) & Core 2 Duo 6600 @ 2.4GHZ:
ASUS P5B:
http://www.asus.com/products4.aspx?l...78&modelmenu=1
I installed the following Ram:
KINGSTON KHX6400D2/1G HYPERX 1GB PC6400 800MHZ
http://www.e-shop.gr/show_per.phtml?id=PER.554789
But, when the system boots up, at the American Megatrends Bios DOS screen, the memory is recognized as:
PC2-5300 667MHz and not PC2-6400 800MHZ!
I updated the Bios to 1007 from here:
http://support.asus.com/download/dow...n-us&model=P5B
But the same problem persists!
I read in the manual:
http://support.asus.com/download/dow...n-us&model=P5B
Quote:
Due to chipset limitation, DDR2-800 with CL=4 will be downgraded to run at DDR2-667 by default setting. If you want to operate with lower latency, adjust the memory timing manually.
Some old-version DDR2-800/667 DIMMs, may not match Intel's On-Die-Termination (ODT) requirement and will automatically downgrade to run at DDR2-533. If this happens, contact your memory vendor to check the ODT value.
I can’t find any section on the BIOS menu where I could adjust the memory tiomings manually?!
But this specific Kingston RAM is mentioned as CL5, with timings:5-5-5-15, so this shouldn’t be happening!?
Also, in the manual, at the P5B Premium Series M/B Qualified Vendors List (QVL) DD2-800MHZ capability, Kingston 1GB DDR2-800MHZ is listed, but not my specific KINGSTON KHX6400D2/1G HYPERX 1GB PC6400 800MHZ model.
Is there any solution to this problem or should I change the brand of the RAM or even the M/B?
Please, any help will be highly appreciated!
Thanks in advance.
Re: ASUS P5B & KINGSTON KHX6400D2/1G HYPERX PC6400 800 recognised as PC2-5300!
I know this post is a little older, but here is some info that I dug up about this exact issue. I got this data direct from kingston.com:
Quote:
Some motherboard BIOS may need to be manually adjusted. There are over a million different combinations available. The most common are those that help DRAM speed, DRAM timings, and voltage. CLICK HERE for the proper settings.
Further, when digging even deeper, I found this statemenet for this exact model memory chip (KHX6400D2/1G):
Quote:
This module has been tested to run at DDR2 800MHz at low latency timing of 5-5-5-15 at 2.0V. The
SPD is programmed to JEDEC standard latency 667Mhz timing of 5-5-5-15 at 1.8V.
Hope this helps in case anyone else has this issue.