i bought the

memory at CC this weekend. i put it in an old comp i had that runs a gigabyte ga5smm
http://www.gigabyte.com.tw/MotherBoard/Pro...cts_GA-5SMM.htm


but for some reason it will not recognize either as 256mb. i took all memory out and tried jsut one stick. it sees it as 120MB, not even 128. i use bootup to see this and WCPUID (a known and trusted tool) to check what the computer see's it as. i tried different slots but it seems as though this mobo requires the memory be in slot 1. i tried a bunch of different combinations. it never registers as even 256 with both in.

any ideas? it's a new problem to me. i thought 133 is backwards compatible to 100mhz. upon reading the manual i dled off of gigabtyes site on this mobo i have finally found that it says '67-100mhz.' it never said that anywhere else on their site (like quoted above. so i figured 133 or 100 was fine since 133 is backwards compatible to 100, or atleast that's what ithought. does that make sense though? just because it's 133 instead of 100mhz it thinks it's only 120mb instead of 256mb?

#256PC133ONLY is the key. 256PC133ONLY is not backward compatible with PC100.

From the Centon Website:
Modules that are labeled "not backward compatible" are built to perform at a specific operating speed and are not programmed to operate in slower speed systems. A Centon Electronics Memory that is said to be "not backwards compatible" will work on all PC133 computers, and only select, newer PC100 computers.

that's what i wondered about once i read the "pc133only" and after i figured out my comp is, at highest, 100mhz. but the thing that's weird is that it does work, just not all 256mb of it, only 120mb.

Here's what's probably happening.

It's recognizing half of it, 128MB. The missing 8MB is probably being used by a shared memory video card?

onboard video. i still find it weird that 133mhz only works on a 100mhz only board.