Dell :: Webcam, Bluetooth, And Overheating Issues With Studio XPS 1645

So my studioxps 1640 was replaced with a 1645. I was glad I got an i7 and a 1GB video card upgrade due to many other issues with the 1640, but I'm having a terrible time with the 1645.

First off, when I first used the 1645 for 15 minutes, the fan turned on full blast. I was just using firefox, so I ignored it and thought the laptop was just getting broken-in. But the heat issue appeared regularly. If I don't turn off the laptop, the whole laptop shuts down to either a bluescreen or it just powers off. Sometimes a weird clicking/crackling noise will come from the fan area near the heatsink even when the fan isn't on! It's like a bunch of metal balls are falling down a pipe.

I've left the bottom cover open to check if the heat sink was dissipating heat, but for some reason the metal area on top of the i7 was burning hot but the copper "pipes" were actually cool/cold. I'm getting a heat sink and fan replacement and I'll let you know how that works.

Next issue: webcam. On the 1640, running the webcam at 640x480 produced no lag and smooth pictures, but the 1645 constantly jitters at 640x480. Is this is a common issue?

Lastly, the bluetooth card is giving me a terrible time. I have used windows 7 x64 on the 1640 and bluetooth gave me no problems, but on the 1645 it is horrendous. I've switched bluetooth cards between the laptops so it's not a hardware issue. However, I'm trying to connect a bluetooth mouse and the card will detect a mouse, but it will never connect to it. I've tried numerous other techniques I saw on other threads. I ran the driver utility in compatibility mode, I've installed windows mobile device center, I've even formatted the hard drive. any help?