沒人回應,只好自己答
轉自1bits數碼天堂討論區(PCDVD數位科技)
Q: How do I interpret the G400's model number?
A: The model number looks like this: G4+MDH4A32GB/40, which consists of several groops of letters that each have a special meaning:
If your model number starts with G4+MM, you have a Matrox G400 MAX (which has the core running at 150MHz, the RAM at 200 and the RAMDAC at 360MHz). If the model number starts with G4+M, you have a 'vanilla' G400, which core runs at 125MHz, it's memory at 166Mhz and the RAMDAC at 300MHz
The next part can either be DH, which stands for Dualhead, or SH, i.e. Singlehead
4A means that your G400 is capable of running it's AGP texture transfer speed at up to 4x, 4 means it can handle up to 2x AGP
32 or 16 is the number of megabytes of RAM on the card
G means it is equipped with SGRAM, DG means it is equipped with SDRAM
Finally B/40 or a similar code will tell you something of the sales info, in this case that it is a bulk version (a.k.a. OEM or white-box), and that it is sold to the retailer in packages of 40

G400 能不能上 4X AGP 是要看型號
可上agp 4x的g400當然可以插在845主機版上囉
要先確定你的g400可不可以跑4x(好像型號後面要有4a才可以)

http://forum.pcdvd.com.tw/showthread.php?s=a9f98746542649ab9e085b5196236375&threadid=45594&perpage=10&pagenumber=1

心動就要行動