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Thanks guys. It turned out that the original OEM stick of memory was the finicky one. Oddly enough, it came with a cheapo stick of PC2700 out of the box.<br />
<br />
Extra props to stockhes for the detail.
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Thanks guys. It turned out that the original OEM stick of memory was the finicky one. Oddly enough, it came with a cheapo stick of PC2700 out of the box.

Extra props to stockhes for the detail.

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I bought a stripped down cheap computer for running test applications. <br />
<br />
It only came with 128MB of PC2700 RAM so I bought another 256MB: same speed, different manufacturer (Corsair Value/Select vs. generic that came with it).<br />
<br />
When having it in the computer during an installation, it made a 1 minute task take 60 and after installation, I get a blue-screen after shutting down.<br />
<br />
If I remove one stick or the other, the system appears stable, but I don't get it. Why doesn't the memory try to get along?<br />
<br />
It's a Biostar u8668d if that helps, and it's supposed to be able to handle 2 GB of memory I guess.<br />
<br />
What could be happening?<br />
<br />
I need to add another 256-512MB, so I want to make sure I'm not upsetting something delicate here.
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I bought a stripped down cheap computer for running test applications. 

It only came with 128MB of PC2700 RAM so I bought another 256MB: same speed, different manufacturer (Corsair Value/Select vs. generic that came with it).

When having it in the computer during an installation, it made a 1 minute task take 60 and after installation, I get a blue-screen after shutting down.

If I remove one stick or the other, the system appears stable, but I don't get it. Why doesn't the memory try to get along?

It's a Biostar u8668d if that helps, and it's supposed to be able to handle 2 GB of memory I guess.

What could be happening?

I need to add another 256-512MB, so I want to make sure I'm not upsetting something delicate here.

Adding Memory Makes System Unstable. How to fix?

A desktop computer is a personal computer designed for use at a single location due to its size and power requirements, usually by one person. The most common configuration has a case that houses the power supply, motherboard, disk storage (usually one or more hard disk drives and optical disc drives); a keyboard and mouse for input; and computer monitor and printer for output. The case may be oriented horizontally and placed atop a desk or vertically and placed underneath or beside a desk.