T2330:
http://processorfinder.intel.com/details.aspx?sSpec=SLA4K
T5500:
http://processorfinder.intel.com/details.aspx?sSpec=SL9SH
T5500 has double the cache, faster FSB, and slightly higher clock speed. Much more importantly, the T2330 is a Pentium Dual Core processor, while the T5500 is a Core 2 Duo processor. Both are 64-bit processors.
It is a Processor made for laptops. Intel Core 2 Duo T5500.
x86-64 is 64 bit processing on 32-bit architecture,not to be confused with true 64 bit-processors like Itaniumhttp://en.wikipedia.org/wiki/X86-64
There are many good computers for a small business. Some of the best computers for a small business are Apple iMac, HP Compaq 6000 Pro, Dell Precision T5500 and HP Compaq DC5850.
T6500 is faster and also, the T6500 is not "core duo" like the T4200 but "Core 2 Duo" (newer)
Yes, you have the 943GML Chipset and a Celeron M 520 @ 533FSB, 1MB L2 Cache. Merom Socket MCore-2-Duo`s @ 667FSB work great, just make sure you have the latest BIOS, which is 77.15. I installed a T7200 in a ML6230 and up`ed the RAM to 2GB it really made a difference in it`s ability to multitask and perform CPU resource hogging task like converting video.Your best CPU Options for Socket M @ 667FSB Core-2-Duo are1) T5500 2MB Cache2) T5600 2MB Cache3) T7200 4MB Cache4) T7400 4MB Cache5) T7600 4MB Cache6) T7600g 4MB Cache