How do i know if i have bad ram

[Taylorm]

I have 128mb pc-100 sdram (dunno what company, I got it in a kickassgear.com upgrade package)

Anyways, I will be playing counterstrike getting like 100fps with my geforce but when i turn corners really fast the graphics go in slow motion. iM thinking i have bad ram

 

[angel1610]

If you would have bad ram first of all at startup of the computer you would have a beep or no sceen at all or it would run on partial ram like if you have 128 then it would sometime read 64 intermited....