Upgrade CPU presario CQ56-219WM

Hi, I'm considering buying a Presario CQ56-219WM with a Celeron 900 cpu.
According to Intel's website it has the same socket and family as several Core2 duo CPU's that I have sitting in my inventory. The celeron is a single core 2.2ghz, and I'd like to use one of the following Core2 duo.
T7100    1.8ghz
T7300    2.0ghz
T7500    2.2ghz
T7700    2.4ghz
I really don't think I'd find the machine usable with the celeron, but should do quite nicely once I drop in one of my CPUs, I just don't want any surprises, like a soldered cpu, or a bios that doesn't allow cpu swap, or any similar unforseen issue.
Your guidence is much appriciated.  
TuuS

Definitely a significant performance improvement. I inherited the laptop with a bad hard drive. After putting a new 7200rpm drive in it and reloading W7 I didn't do much with it with the Celeron 900 processor but it would not even play a 480p Youtube video without stuttering and frame freezes. If you ran Taskmgr the processor was flat out at 100% just trying to pull that off. I had the T7100 sitting around and figured I'd see how hard it was to try it in the laptop. It took me about 45min to get it disassembled and the new processor in it. It runs YT 720p videos just fine now without any interruption and Taskmgr shows 39-50% proc utilization. I find the YT test is a good one because it does a decent job of working the hardware and that's what most folks do with their laptop anyway. It's not Core i7 but it will work just fine for the family member that needed a laptop.

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