Identifying the Clock Generators on an ASUS P4T-E Motherboard
There are two versions of the P4T-E, both of
which share the same revision. One version uses ICS brand
9212-13 DRCGs, while the other uses CYP 632081 DRCGs. With few
exceptions, only the boards with the ICS chips achieve stable
operation at 533FSB and above. There are two DRCG chips on each
board, located near the RAM slots.
Before buying a board, attempt to confirm with
the vendor that the two chips located near the RAM slots have
"ICS" (and not CYP) listed on them; that will ensure that
533+MHz memory is supported. See the green area of the
screenshot below for help on locating the two DRCG chips:
   
Click here to
see an enlarged version of this picture
Click on the light green rectangles to see a
close-up image of the DRCG
Note even if you have the version with the
superior ICS chips, you will still need to use the mainboard DIP
switches in order to run RDRAM at 533+MHz. Through the bios
options, it is not possible to access the 1/2 AGP and 1/4 PCI
dividers that are necessary to attain stable operation at high
memory speeds; the only way to access these dividers is through
the use of the mainboard DIP switches. See the previous page for
info on how to correctly set the DIP switches for various memory
speeds between 533MHz (PC1066) and 600Mhz (PC1200). Note you
will lose access to voltage adjustment when using the mainboard
DIP switches, but there is always the
wire trick.
For those with the ICS chips still having
difficulty with 4x133=533Mhz FSB/RDRAM:
- Ensure the power supply's auxiliary
connector is attached to the mainboard, as you may have
problems beyond 4x120=480Mhz FSB if you do not
- Try a PS/2 mouse, as certain USB mice can
cause problems at 533FSB on the P4T-E and other motherboards
- Ensure that your processor is supplied
with sufficient voltage (those using a Northwood A CPU may
need to perform the
wire trick when moving from 400Mhz FSB to 533Mhz FSB)
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