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Asus (P55 chipset) and poor SATA performance

N

nextlcder

n00b
Joined
Feb 16, 2010
Messages
16
Hi there,

I've built a new system: Asus P7P55D-E LX mobo (chipset P55), core i5, etc. It's the same as the P7P55D-E mobo, but with only one PCIE 16x slot.
The problem is that the same hdd (WD Black 2TB) has far better performance in another computer that a friend of mine has with Gigabyte GA-790XTA-UD4 (chpset 790X, Phenom II X4, etc.).

Here are the benchmarks:

Asus P7P55D-E LX (Intel SATA 3gbps controller on P55 chipset)
wd2001fasshdtachrwintel.png


Gigabyte GA-790XTA-UD4 (AMD SB750 SATA 3gbps controller)
wd2001fasshdtachrwamdsb.png

In this second case the hdd works at full speed.

How is that possible? Anyone knows? Should I exchange the Asus for a socket 1156 Gigabyte mobo (e.g. GA-P55A-UD3) or is it gonna be that bad too?

PS: There's a feature in this mobo (IO Level Up) so that SATA 6gbps can perform at full speed by decreasing PCIE speed to 8x) but I have it disabled, and anyway it's not the Marvell 6gbps that I'm using, but the Intel controller. So this can't influence the result.
 
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