Mushkin doesn't manufacturer their own memory, so they simply stuck a sticker on the 256MB PC1066 modules of Kingston ValueRam. The code on the side of the RIMM says KVR1066x16-8/256 and the 1066x16 bit means that this memory is rated to run at up to PC1066 standards and that the memory is 16 bits wide. The -8 means that the RIMM uses 8 DRAM modules, and the 256 represents the module size. The little yellow diagram is actually telling the truth, the Kingston PC1066 reached about 40-50C during the testing. While I'm not sure if adding a fan is really going to bring the temperature down into a more stable region, it did offer a bit of piece of mind - so we did just that and it helped keep the memory in more acceptable temperatures.