The Xbox motherboard reads at 5400rpm and has 2mb Cache no matter what. So if you bought a 7200rpm & 8mb cache hard drive, you're just wasting money, won't make it read faster or anything. Just about all the boxes that I've modded, I've installed an 80mm fan running at 100% power (12v). The smaller stock fan runs normally at 20%(7v). I notice a good difference in temp. decrease with my 80mm running at 100%. You also don't need to put the ground wire on the case or under a screw to make it 12v. You can mod Xecuter BIOS to make the fan whatever % you want it at, or have a dashboard like UnleashX where you can change it whenever. The best xbox is mine.