This is the first time I have ever seen this problem, after building 25 pcs, so I am a tad confused. My mobo is an MSI 7701. It takes DDR333/400 currently it has a 512Mb DDR333 card and I wanted to use one of the 256 ones from my old machine. While in a shut down I opened up the case added my hdd and tried to fit the memory card, it is a tight squeeze, but it goes in. Now here's the problem the locking tabs don't coincide with the locking notches on either card.
My problem is I can't afford to get any more memory at the moment, so I wondered if it is safe to fit them without using the locking tabs? The cards aren't loose it takes a litle effort to get them in and out, which doesn't sound right to me, as they sould just slip in and lock. If not it will be time to save up again.
The only other otpion would be to try a DDR400 card, but I have never mixed DDR memory and have only read about it causing problems. Is this true?