8GB over 4GB - Combination OK?

[BusError]

8GB also works great in Linux, even the 32 bits version. I compile very, very large projects with "make -j8" on the quad, and on big c++ project I'm glad I have the 8GB !

You need the PAE mode set in the kernel, in [kx]ubuntu thats the '-server' kernel variant.

OSX Leopard also uses the 8GB completely transparently.

 

[NickK]

8GB also works great in Linux, even the 32 bits version. I compile very, very large projects with "make -j8" on the quad, and on big c++ project I'm glad I have the 8GB !

You need the PAE mode set in the kernel, in [kx]ubuntu thats the '-server' kernel variant.

OSX Leopard also uses the 8GB completely transparently.

Yup I run 4GB on my MBP and with make -j5 for gcc compiler work as it gets to compiling gcj it gets over 3GB of memory used
Also it spends less time hitting the slow Fujitsu drive too with swaps also down to zero.
2.5 hours later compiling... it's done

Btw - you should have some additional make jobs ready to run, so running -j8 for you would be wasting some CPU time.. I'd use -j10 or 12.