We tested the SATA and eSATA performance with an Intel X25-M SSD to maximise the use of the SATA connections and reveal any differences in performance.
SATA Performance
HDTach 3.0.1.0, 8MB Zone Test, Average Read
Asus Maxmius III Formula (P55)
DFI MI P55-T36 (SATA and eSATA)
MSI P55 GD65 (P55)
Gigabyte GA-P55-UD5 (P55)
Asus P7P55 Deluxe (P55)
Gigabyte GA-P55M-UD4 (Gbt SATA)
Gigabyte GA-P55-UD5 (Gbt SATA)
Gigabyte GA-P55-UD5 (eSATA)
MSI P55 GD65 (Blue/eSATA JMicron)
Gigabyte GA-P55M-UD4 (P55)
Asus P7P55 Deluxe (Blue JMicron)
Asus P7P55 Deluxe (White JMicron)
Asus Maxmius III Formula (Red JMicron)
Asus Maxmius III Formula (White JMicron)
Asus P7P55 Deluxe (Black JMicron)
220.1
218.7
216.1
187.5
186.6
182.5
174.1
172.2
161.8
159.7
137.9
136.7
136.7
81.6
72.3
0
50
100
150
200
250
MB/s (higher is better)
SATA performance is impressive - we saw no slowdown from CPU idle states, unlike other boards, as the X25-M G1 SSD maxed out at the usual ~220MB/s. With only three SATA ports on the motherboard, the eSATA is also wired from the P55 PCH too giving the same result.
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