Aside from the logo, it looks like the processors have a lot of similarities in the architecture, but that's all the jargon we need to talk about, let's just see how well these CPUs perform under extreme OCing.
This is great, thanks for creating this resource, because I've pretty much given up on my laptop. As you can see, that was going to be a last hurrah for this machine, somewhere along the line it just stopped working. So, it's in for a total makeover! Expect some 3rd party upgrades, they're the way to go for a laptop with a 4-year warranty.
Intel Xeon E3 uses LGA 3647 package, while LGA 1405 and 1155 socket systems of Xeon E5 uses LGA 1155 package. This is a byproduct of the die-shrink from Nehalem/Westmere to Haswell/Broadwell; the LGA 1155 system uses the same PCB as the Xeon E3. Two Xeon E3 CPUs are identical.
3945-A/2: Loosely speaking, this implies that the "AH suffix" is in the +5V spec (Vihfufs) range. If all is well and the bios rule is applied, the CPU should be able to reach a higher clock (clk) than the default of @400MHz.
The "X suffix" is a by-product of the die-shrink from Nehalem/Westmere to Haswell/Broadwell. The actual H/W capabilities of the Xeons (in terms of cores, threads, cache, and the like) are the same as the Xeons in the previous "legacy" generation. d2c66b5586