How to check for effects of bad RAM.

I have a Debian system I use as a webserver and headless torrent box. This morning I woke up and it was beeping and the powerlight was flashing so I reboot and disabled the quick POST. I had recently added 3 more 128mb DIMMs taken from older machines (to a total of 512mb) so that was my first guess at the trouble.

After trying each stick with the long BIOS memory test seperately I found that two of the sticks had turned bad overnight. Is there any way to check for filesystem corruption or other adverse effects of the failed RAM?

fsck?

>>2
Don't insult me. I asked nicely for help.

What is fsck? Baby don't kcsf me. Don't kcsf me. NO MOAR.

>>2
Filesystem is Reiser3.6 so it should be fine. I'm more interested in stuff liek can I tell if corrupted data was written to a file.

Also >>3 not me, lol.