I have a EG45M-UD2H running BIOS F3 and Linux. I noticed a pretty significant HDD speed decrease with this board. If I take the same Seagate 7200.12 (1 gig) HDD and benchmark it on another motherboard, the cached reads are about 7x higher.
For example, under the EG45M-UD2H:
# hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 2692 MB in 2.00 seconds = 1346.47 MB/sec
Timing buffered disk reads: 386 MB in 3.01 seconds = 128.13 MB/sec
On another motherboard (DFI LP P35-T2R):
# hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 14740 MB in 2.00 seconds = 7378.19 MB/sec
Timing buffered disk reads: 368 MB in 3.02 seconds = 122.04 MB/sec
The only relevant settings I see in the BIOS are:
BIOS settings: Integrated Peripherals>SATA RAID/AHCI Mode [AHCI] <-- I have also set this to disable and there is no difference
SATA Port0-3 Native Mode [Enabled or Disabled] <-- I tried both and there is no difference
Does anyone have any thoughts?