GA-G41M-ES2L - Memory Issues

[Rugi]

So I just bought a 1GB DDR2 PC2-5300 stick of the PNY brand to replace my old 512's. When I took out the old sticks and plugged in the PNY the PC would not boot. It would just infinitely power itself on and then off again until I pulled the plug. Put the 512's in again and it works fine. The PNY stick says it is compatible with 667MHz, 533 MHz, and 400MHz so I doubt that is the issue as the 512's are 533MHz. Could PNY just be plain non-compatible with this board?

[Dark Mantis]

Hi and welcome to the forum.
Quite likely. It could just be that they are double sided or something simple like that the board doesn't like. You may find a BIOS update will alllow you to use them. Check to see what BIOS you are running now and then look on the website for a newer one. If it is very  much different do the update in two stages rather than all at once. Just a bit safer that way. You don't say what revision your board is but have a look here for it.

http://www.giga-byte.co.uk/support-downloads/download-center.aspx?kw=GA-G41M-ES2L&ck=