memory problems

[leekirlew]

I've just aquired the memory in my sig, But I can't get it to overclock in 1:1. Its 500Mhz memory, which by rights should allow me to hit a FSB 250Mhz. However if I set the memory to 400DDR the system fails to boot and will only boot at DDR333. The whole reason for buying this memory was for 1:1 overclocks! I've tried upping the DDR voltage to 2.8v and still no go. Is there a combatibility issue maybe between my board and shiny memory?

 

[Kyanzes]

There are a few possibilities/solutions:

1., The manufacturer's site states that PC4000 (DDR500) is only achievable when it's set to 3-4-4-8. Now it is possible ofc that it would also work on lower settings but I would give it a try. So set the mem params manually instead of auto config (if you haven't tried it yet). Also set command rate to 2 (for the test, if it works well then you can try to set it to 1 to test it).

2., You didn't state as to which config you have: 2x512MB or 4x256MB. I assume that you have the 2x512MB. In the other case the four-module configuration may not work very well on tight memory settings especially when the command rate is set to 1.

3., It may has nothing to do with your memory settings at all. Have you set the PCI clock to fixed? Maybe it's just your controller can't boot your drive because of the very high PCI clock.

4., Download MEMTEST and boot it from CD. Run it and see if your memory fails.

5., Don't know.

 

[leekirlew]

Thanks for the reply.

I'm now running at fsb210mhz with 3-4-4-8-1t timings and 1:1 divider.

I'm running 2 x 512mb sticks

Yep, the agp/pci lock is at fixed.

Anymore suggestions anyone? Surely I should be able to my cpu max with these timings and 1:1 divider? I can't even get the memory to run at stock settings at the mo : (