CPUs > 3 GHz and more CPUs > 2.0 MB and more > 100 GBP to 199 GBP

Advantages: Very Fast, Stock fan is not too loud
Disadvantages: Further overclocking would require a better fan

This is the fastest standard Intel Core 2 Duo you can buy, the E6850 has a 333Mhz FSB which is 1,333Mhz Effective so it has more memory bandwidth than its descendants. The E6850 has a VID of 1.35V most of the time (some of them have a VID of 1.3v although it's uncommon) and runs slightly hotter than a E6750 with a VID of 1.3, during my tests I also noticed it is harder to overclock than an E6750 but only by a small amount, me getting the clock speeds ...
...get the E6750 up to just under 3.65Ghz, this was just with the boxed fans that came with the processors, although if you bought custom coolers, you would get much better. Conclusion: While I could not get it to overclock as high as an E6750 in my tests, you could easily reach over 4Ghz if you bought good enough cooling for it, however if overclocking is not for you, this processor is still an ace to pick up and will run any of tomorrows software ... Read review

Advantages: Dual-core performance for true multi-tasking
Disadvantages: Price a little bit more, but makes sense.

...in today's mainstream notebook PCs AMD Athlon 64 X2 6400+ / 3.2 GHz processor has given me a sigh of relief. So what's it bringing with itself? AMD64 technology brings your notebook PC to life with dual-core performance, superior graphics, and wireless technologies from AMD's technology partners. It's everything you need for an enhanced Windows Vista™* experience you can take with you anywhere and coming with a price that makes sense. # Key features ...
...and wireless capabilities from AMD technology partners ~AMD PowerNow!™ technology for performance on demand and extended system battery life ~Enhanced Virus Protection** (EVP) helps protect against certain viruses, worms, and other malicious attacks ~HyperTransport™ technology boosts overall system agility so applications are more responsive and deliver incredible performance # Compatibility wise: AMD Athlon 64 X2 dual-core processors for notebook ... Read review

Advantages: Very quick, highly overclockable.
Disadvantages: None, except there are not many stock often.

...any problems or voltage changes. Intel recommends a voltage of 1.225 volts. When compared to the Q6600 this processor might fall behind but at the moment hardly any problems utilize all 4 cores and the the moment 2 cores is enough. However if you are willing to spend another £20 -£30, i would recommend but the q6600 because in the future programs will take advantage of the four cores. The heat sink provided in the box is better than i expected, it ... Read review

Advantages: Price, value, performance, ease of setup
Disadvantages: Extreme performance outruled, long term viability...

As one of the more standard - mid-high end processors available today, the 3ghz chip is useful for most average and moderately demanding programs and games. When coupled with the correct memory, and graphics card you cant really go wrong, however for users who demand the most out of their system it doesnt really fit the bill. For a start, its an excellent product if you're on a budget, weighing in at less then £120 nowadays its a real bargain. BUT, ...
...fanatics who loves to squeeze every last bit of juice out of their system, its not ideally a system you'll want to be purchasing soon, considering 4GHZ+ chips are now available. Works like a dream for me, easy to install, easy to follow the instructions, and help from intels website like ive never seen. The games I tested using it: DOOM3, FarCry, and 3dMark cpu tester. All came out relatively well, but thats considering i have a 9600XT graphics ... Read review

Advantages: Good clock speed, good video decoding and overall reliabilty
Disadvantages: Only 2 MB cache

The Core 2 Duo e6400 has many good features: It uses a 1066 MHZ FSB (front side bus) for a fast link on the motherboard. It 2 cores running at 2.13 GHZ The Processor is very EASY to overclock; just be careful. It is energy effecient and runs cool, unless you over clock Not as good features: 2 MB cache low compared to others in the range I found this processor to be excellent; it was extremely fast. With this processor there is no worry of ... Read review