PC-66 and PC100 Memory

[bulldog78]

It's been a while since i've dealt with the slower stuff, but I just wanted to see if you can use pc-100 memory in a system that uses pc-66? I have an older Compaq Deskpro that i believe has a 32mb pc-66 chip and from an ebay auction a guy sold me a couple pc-100's (auction said pc-66's but he lied). Tried em and the system wouldn't boot alone, put them in (2-32mb pc-100's) with my 32mb pc-66 and it said i had like 164MB of ram and the system would reboot halfway through loading windows every time =) any help is appreciated...

The 32MB that came with the system is labeld; KM48S2020BT-G12

the 2 pc-100's i bought are labeled: 5264165FTTA60 HYB39S64160AT-8

thanks

 

[StraightPipe]

did you try with just the 66 RAM?

i realy dont know if 100 and 66 are compatable

 

[bulldog78]

I even tried teh PC-100 memory by itself one stick at a time and my system would not boot. I'm baffled.. I'm not down with the old stuff anymore. LoL

 

[Boonesmi]

pc100 is very compatable with systems that require pc66

does the motherboard require ecc? registered? (if it requires ecc pc66 then regular pc66 or pc100 wont work)

 

[bulldog78]

I'm trying to look up the numbers of the dimm that's already in the system but i'm having no luck finding out if it's ecc/edo or not...

 

[Vegito]

some pc 100/66 that compaq used are 5v, some are 3.3v. I dont remember because thats the reason I stop dealing with it..