Overclocking a P4T-E to 533 FSB
Barry Watzman
Started trying to overclock it, got to 118 MHz fine, at 120 it works
sometimes, not at other times.
Tried 133 MHz, which would effectively be a 133/533 Pentium 4 equivalent
(at 2,128 MHz), but it won't boot or even POST. Then I noticed that the
motherboard has Cypress DCRG's on it rather than ICS DCRG's: Well,
forget that, it IS a memory problem, not the RDRAM itself (which might
or might not overclock), but the motherboard memory clock generator
chips. RDRAM is getting a bad rap here, people are concluding that it
won't overclock. Well, RDRAM itself will overclock, but most of the
P4T-E motherboards were made with Cypress DCRG's (Rambus clock generator
chips), and the memory not withstanding, these chips on the motherboard
won't work at 533 MHz (you could use real PC1066 RDRAM and it STILL
wouldn't work).
So, what to do? Well, try this: Set the MEMORY multiplier to 3x
instead of 4x in the BIOS, then set the CPU FSB to 133 MHz. SUCCESS !!
The memory is running ON SPEC at 133 x 3 = 400 MHz (x2 for double
clocking = PC800), the processor is happy as can be with a 133/533 bus
at a CPU speed of 2,128 MHz. Not quite as good as a P4T533 with PC1066
memory, but a BIG step up from a 1.6 GHz stock system.