1Gb DDR2 = ok. 2Gb = crash [SOLVED]

stuorguk · Last edited by stuorguk on Wed Jan 17, 2007 6:13 pm; edited 1 time in total

I have 2 x 1Gb DDR2 Ram. Together they ran without fail with Memtest86 for 8 hours. However, under heavy load, such as compiling, my computer locks up, or resets itself.

If I run the computer with just one DDR2 installed (and I have tried both), it's stable.

CPU: 2 Core Duo
Kernel: 2.6.19-rc6-mm2

Any ideas?

Stuart

Keruskerfuerst · Posted: Wed Jan 17, 2007 10:01 am Post subject:

1. Power supply is not working correctly. A good (and not cheap) power supply e.g. from Seasonic or BeQuiet is a very good choice.
2. The switching power circuit for the CPU (contained on the mainboard) does work correclty.
3. The CPU cooler is not sufficient. A cooler from e.g. Scythe (Scythe Mine cooler) is a very choice.
4. The temperature in the computer case is too high.
5. The memory is not recognized correctly or the Ram modules are installed in the wrong memory slot.

stuorguk · Posted: Wed Jan 17, 2007 10:12 am Post subject:

Keruskerfuerst · Kernel: 2.6.19-rc6-mm2

stuorguk · Posted: Wed Jan 17, 2007 10:41 am Post subject:

Keruskerfuerst · Posted: Wed Jan 17, 2007 10:50 am Post subject:

1. Kernel preemption: try to set it to off.
2. Flat memory is the usual setting. Sparse memory is for NUMA systems.

Paapaa · l33t Joined: 14 Aug 2005 Posts: 955 Location: Finland

And I guess you have support for 4GB memory turned on?

stuorguk · Posted: Wed Jan 17, 2007 11:17 am Post subject:

November Rain · Posted: Wed Jan 17, 2007 11:18 am Post subject:

I think your ram modules use dualchanel. check the timings in the bios. I had the same problems, because my ram modules are optimized for nforce boards and i have a via chipset.
_________________
Gentoo Linux - Intel Core 2 Quad Q6600 - 32 Bit
4 GB G.Skill PC6400 DDR 2
MSI P35 Neo 2 FR
MSI GeForce 8800 GTS 512 MB G92 OC & Club3D 8400 GS
Samsung 245B plus & HP w2408 Vivid Color

stuorguk · Posted: Wed Jan 17, 2007 11:21 am Post subject:

Naib · Posted: Wed Jan 17, 2007 12:49 pm Post subject:

check the BIOS config for yr ddr2, mobo manufacturers tend to be very conservative
sure the timing wont cause any problems, but the voltage would.

I kept crashing out until I read that they are conservative, got CPU-Z (and a couple of other apps for BIOS-checking) and saw that the timing was slower (5-5-5-15 and not the 4-4-4-12 my RAM can do) as well as running at 1.8V !!! most DDR2 like 2.1V

since my RAM likes 2.1V (says it on the stick as well) upped it and everything fine since
_________________
#define HelloWorld int
#define Int main()
#define Return printf
#define Print return
#include <stdio>
HelloWorld Int {
Return("Hello, world!\n");
Print 0;

luqas · Posted: Wed Jan 17, 2007 1:46 pm Post subject:

stuorguk · Posted: Wed Jan 17, 2007 6:12 pm Post subject:

FIXED!

It was indeed DDR2 memory voltage. I pushed it up a little.

Thanks all.

Stuart.

Paapaa · l33t Joined: 14 Aug 2005 Posts: 955 Location: Finland

Just for the record: what is the brand and model of the memory you are using?