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X48 (ddr3) AGAINST P45 (ddr2)
i thought this was interesting comparison.
i did a PCMARK 2005 bench on the IP35 Pro and then ran it against Gigabyte's X48T-DQ6 (ddr3)...as you can see, the X48 was ahead anywhere between 0 to 8% in the four categories....all the hardware was exactly the same except for the obvious ddr3 memory on giga's board.
what i see now, the P45 chipset is just about X48's equal...the obvious difference is the PCIe 2.0 bus speed..the X48 has 16x link speed for both 16x slots while the P45 offers only one full 16x speed...if you put it into the crossfire mode, the link speed drops to 8x for both 16x slots..you really do not see a big drop with the video card at 8x speed...graphics speed declines only 6% in performance...you kind of get faked out when you see a 8x linked speed for the P45 in the crossfire mode and then observe 16x link speed for the X48...it doesn't even correlate to even coming close, obviously, to a 50% drop.;)
reason i mention this is for users like myself who want to use the 2nd 16x PCIe slot for a raid card like the areca raid card (8x card)....so...i have to set crossfire mode to make the areca card operational, at least on the Biostar board.
EDIT:...need to add the reason for a higher PCMARK 2005 score...mostly due to my new WD Veloci-Raptor drives in Raid 0