Intel PC SDRAM unbuffered DIMM specification

[Jeordiewhite]

http://h20015.www2.hp.com/en/documen...3&cat=prodinfo

I'm curious as to what sort of memory would be compatible with this HP.
SDRAM, 100 MHz,
Intel PC SDRAM unbuffered DIMM specification,
revision 1.0 compliant
I haven't really ran accross this before and was wondering what this intel pc sdram compliancy means?
Which type of memory would I have to get to work, high or low density memory or what?
I know I would like to know before I do purchase a module for a friend so it works and he doesn't have to return it.
It looks like 256MB is the max anyhow and I would be looking at either 128MB or 256MB memory module.
Thanks in advance for any help.

[PresterJohn]

i've been able to run pc133 on many of the hp mobos that used pc100. definitely get the low-density memory (double-sided) for best compatibility. i don't think you would have any problems with high-density ram as that bios should support it but i've come across one or two models that didn't like it (kingston).

in fact, if you're interested, i have a number of pc133 256mb low-density (HP sticker memory) for sale. PM if you're interested...

[HeadBand]

my dad has an hp very similar to that 866 instead of 933 but the rest is the same and pc133 would not work on his he needed pc 100

[Peter M]

BS. The speed grade is an UPPER LIMIT on how fast you may operate a DIMM.

What makes or breaks DIMM compatibility with any given system is the density of the individual SDRAM chips on a DIMM, paired with the system's capability of addressing them, or lack thereof.

It's the SIZE of each SDRAM chip, not its maximum speed. And no, these are not in any way connected.

What chipset are we talking about?

[Jeordiewhite]

The one I was talking about was listed on that site above: Intel 810E
I think it might be that it has to be pc100 with this intel chipset. It doesn't seem to work otherwise. However that and low density modules do play their role as well. I haven't been able to test that tho. However thanks for your help prestorjohn, headband and peter M.
I just needed to know so my buddy can get the right module otherwise I wouldn't want to waste his time since he is doing all he can to afford this.

[Peter M]

You thank, but you didn't listen.

So once again: it doesn't have to be PC100. What it needs to be for 810E is: Made from SDRAM chips no larger than 128 Mbits each.

This means you can use single sided 128-MByte DIMMs with no less than 8 chips on, and double sided 256-MByte DIMMs with no less than 16 chips on. Larger DIMMs, or DIMMs with fewer chips on, won't work.

They need to be AT LEAST of the PC100 speed grade because i810E runs them at 100 MHz - it doesn't matter whether they're allowed to go faster or not.