We are trialling an Intel 915 GAGL motherboard, using two sticks of 512 DDR memory, arranged as dual channel memory. Performance drops by 2 to 5 fold slower when both banks of RAM are installed. When one bank is removed, performance raises back to an acceptable level.
Are there any known problems with RedHat Fedora and dual channel memory? Are there issues in the kernel / patches supplied, that makes the system non-performant when using dual-channel memory? (Possibly also linked with a hyper-threading P4 CPU?)
Has anyone else got acceptable performance from using dual channel memory with Linux on Fedora? (Either an alternative AMD based system, or other?) We'd be very interested to hear.
Our test system
Motherboard: Intel 915 GAGL
CPU: P4 3GHz with hyperthreading
RAM: 2 x 512Mb DDR (and 1x512Mb for non-dual channel tests)
OS: Linux Redhat Fedora Core 3
Kernel: 2.6.9-1.667smp (standard kernel supplied by Fedora Core 3 install).
Many thanks in advance for any advice / suggestions anyone can offer.
-- Regards,
Andrew Mc.Ghee GeniusHealth Ltd. Web: http://www.geniushealth.com/
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