I need a Xeon but I have some doubts regarding which one, I can spend up to $300. It's for a workstation, two important apps work only in 32-bit XP only. I intend to buy a Xeon E5405 2.0 GHz 12M L2 Cache 1333MHz FSB LGA771 Active Quad-Core or a Xeon X3360 2.83 Ghz 12M L2 Cache 1333MHz FSB LGA775 Quad-Core.
Is MB cache as important as GHz? There is a E5506 Nehalem-EP 2.13GHz 4 x 256KB L2 Cache 4MB L3 Cache, it's cheaper. More GHz but less Cache.
Any suggestion up to $300 is very welcome.
You can compare between both processors here:
One of the main difference between both processors is the voltage consumption and the socket type, the Xeon Processor E5405 will consume 80 watts and comes with a 771 socket.
Now, L2 Cache is ultra-fast memory that buffers information being transferred between the processor and the slower RAM in an attempt to speed these types of transfers. This means basically the more cache speed you have higher data transfer you will get.