TRUE should fit - what's your CPU?
If you have a socket 1366 CPU (i.e. i7 9xx) then make sure you get a Revision C TRUE because of the properly machined flat base. Similarly, don't bother with the V8 because it's rubbish at cooling an overclocked i7 9xx.
If you're on socket 775 or an AMD chip then you'll be fine regardless.