I have both in my drive right now! I notice how much louder it is with the Seagate in it!.. I've been using the computer for a while, and the Seagate fell asleep (it is D:, and I hadn't accessed it in a long time). For some reason it just woke up, and man, it makes alot more noise than my 7200 Quantum! And it is 3800rpm! This makes no sense!