oldtimertoo,
I think there are some cases of computers that have BIOS adjustments that can alter the FSB (a multiplier factor), but I imagine that most proprietary systems do not have that facility.
In fact, it seems that using alternate CPU's is quite limited. Recently, I bought a Core2 Duo T7500 (2.93GHz) for a Dell Precision 390 replacing an E6300 (1.86GHz), and which uses the same Socket 775 and the same 1066 FSB, but when installed and started wouldn't make a peep- nothing. It seems that the T7500 had a 45nm lithography instead of the E6300 65nm and that internal difference in architecture meant the T-series wouldn't work- I had to use a 65nm lithography. Checking he original sales material, I saw that the Precision 390 was sold new with a Core2 Quad Q6600 (quad core, 2.66GHz) and based on the socket, FSB, and lithography, that I could use up to a QX6800.
My suggestion is to do similar research to find the fastest CPU possible, first by checking which CPU's were sold new in your model of Gateway, and check all the specifications for that series in case a faster model was added to that line. When I checked specifications for the DX4270, it lists using an "E5200" >
http://ark.intel.com/products/37212/
> but I can't the moment I can't find another 800FSB, 45nm listing in that series.
I hope others, more expert in CPU's will comment.
Cheers,
BambiBoom
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