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Dp35dp memory speed change caused lock up

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Hi,

I have an Intel DP35DP Mobo with a Duel 4core CPU.

I just updated the BIOS to the latest specs, and this permitted me to amend the speed setting for the memory.

I have TWO Kingston KHX6400D2/2G Hyperex DDR2 memory modules, which according to Kingston run at 800, whereas before the Bios update and after it it was Automatic at 667?, as the option was open to change it to 800 I thought why not.

So Said so done. Now 3 beeps, and no post.

I am about to look up the manual and see what the best method for getting back to a clean boot will be, ie jumper if I can find it in my over full case, or disconnect the cmos battery.

After the bios update all was well until the speed change.

Has anyone else experienced this problem with 800 memory?

Other than just putting it back on automatic is there any other option/fix?

Thanks. Peter.

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Once I can actually manage a bootup and access the Bios I will see what I can find.

I have just dissed the Cmos battery, so I'll give it a while, and then try again.

Anything I should look for if it doesn't default start once I have left it a few minutes?

I have reset the jumper, and the system boots.

In the bios I reverted to automatic which is 667Mhz

If I adjust to manual at 800 there are options, but frankly I don't know what they do yet.

They are tCL (4)
tRCD (5)
tRP (5)
tRASmin (13)

These settings are adjustable, does anyone know what they should be? also is one of those voltage settings? as per GhislainG's recommendation of setting the voltage to 2V which is what the memory runs at.

Thanks.

Thanks for getting back.

I had just set them to 5-5-5-5-15 as you recommended prior to reading your reply.

It works, but bizarrely the Bios says that the current memory speed is 667, it then says the current memory frequency is 800 with the memory setting of 5-5--5-15.

Memory frequency given as 800 MHz.... that is what I set it at, but after confirming the 5-5-5-5-15, under the memory slot info it states that the memory is 2048 MB (DDR2 667) SPD: 5-5-5-15 both for channel A and channel B. I do have 4 meg installed.

Unless the memory is incorrectly labelled, this is MOST confusing.

At any rate, it is working now.

Thanks for your input.

Regards, Peter.

Sorry, had to download it first.

CPU-Z states

DDR2 - Channel#dual - Size 4096 Mbytes- DC Mode Symetric - DRAM Frequency 400MHz - FSB DRAM 5.6 - 5 clocks all the way down to 15, then Flow refresh Cycle time 44, and lastly Command rate of 2T.

And to one and all HAPPY NEW YEAR
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