Can I mix in match PC100 PC133 SDRAM?

[QuackQuack]

A friend of mine just asked me and I totally forgot. Any help please?

 

[pukemon]

Yes and no. Older PC133 with lower density chips (128Mb x 8 or 16) will work on most PC100 based systems, but the newer high density chips (256Mbx4 or 8, 256MB or 512MB DIMMs) may not work, also depends on chipset support. If you're still using an old skool 440BX based board, I'm don't think you can even use 256MB standard unbuffered modules; you'd have to use registered?

 

[QuackQuack]

Pukemon:

Thanks for the reply. Here's a link to the motherboard he's currently using:

http://www.msicomputer.com/product/detail_spec/product_detail.asp?model=MS-6340M

It's a MSI 6340M (VIA KM133).

 

[Doh!]

KM133 should handle both the older & newer SDRAM.

 

[TheCorm]

I have recently found that PC133 256mb Double Sided modules when put in most older motherboars (say 500mhz era backwards) only pickup as 128mb. But KM133 based should be fine.

Corm

 

[RyanM]

I can attest that the BH6 and the BE6 both will recognize high-density 256 MB PC133 chips. I've run 512 total on the BH6 (128x2, 256), and 768 on the BE6 (256x3). 512MB modules, however, are right out. Says so right in the manual.