Summary: I replaced the stock Sempron le1300 with the Athlon 64x2. The performance increase was dramatic. I initially used the stock heatsink, which was a mistake. I installed an AMD 64 heatsinc and the processor still ran hot. I used Arctic Silver paste following the instructions on that website. This lowered the temperature a few degrees. It still runs 46-50 celsus which is to hot for confort. The thermal max is 55-68 celsus.
Summary: It is a very good processor, my original was only a 4200 processor. The 5200 is a bit more functionable but not much.I am working with an AM2 socket so I cannot go much higher. I am learning though and I believe that I may be able to go with a 4 core. This processor is great.
Summary: Great upgrade for my Compaq/HP computer and this is the upper limit that it will take on my motherboard. You must get a better heat-sink and fan for this CPU. It may run hot with a small slow fan and sink.
Summary: Got the item very well packaged. Plugged into my computer and it worked. Run on game settings it was very hot, reached about 75-80C, and i thought of returning it. Then I realized, I only got a stock fan, so I bought a new fan, it ran on 55-65 C 100% load. so just make sure you have a good HSF when installing this.