Cold boot OK, very slow reboot

Hello guys,

I'm stumped. I have an Intel Quad core system giving me some headaches.

4 memory slots on the motherboard - 2x2GB + 2x1GB sticks.

System cold boot speed is fine, but on a reboot it takes about 300 seconds to go from the "Starting windows" animation to the desktop.

This is a clean install of Windows 7 x64.

Memory tests OK - (PC Check, Windows Memory Diagnostics, Memtest86)

Reboot speed OK with one stick of 2GB
Reboot speed slow with two sticks of 2GB

Reboot speed OK if I replace both 2GB sticks with the 1GB sticks

Has anyone run into anything like this?

Thanks!

No, but it's an interesting one.

I realise it's time-consuming, but did you check your RAM sticks one at a time and in each socket?

If the problem is RAM-related, you'll need to establish whether a RAM module is faulty or a RAM socket.

I'm pretty sure I have tried every combination.

The 2GB sticks work on their own
The 1GB sticks work on their own

The 1GB sticks in a pair work OK

It only seems to be a problem when using both 2GB sticks.

Win7 x64

Not an HP - it's a custom build.

Mainboard is an Asus P5q-EM DO

Yep.

These aren't new modules, either. System has been running fine for the last couple of years. This problem only seemed to crop up after installing Windows 7.

Probably a long shot, but did you update your chipset drivers when you installed Windows 7?

Chipset drivers were updated.

I'm puzzled as to why it only hangs on the start-up portion of a reboot, not a cold boot.