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XP941 is <strong>PC</strong>Ie Gen 2 (500MBps per lane), while the SM951 is <strong>PC</strong>Ie Gen<br />
3 (1GBps) <strong>PC</strong>Ie. But even the x4 <strong>PC</strong>Ie 2.0 provides 2GBps of bandwidth,<br />
so that can hardly explain the entire disparity.<br />
20GB copy tests<br />
Operating system copies from RAM disk<br />
20GB Folder<br />
Write<br />
36<br />
51<br />
51<br />
57<br />
65<br />
20GB Folder<br />
Read<br />
43<br />
45<br />
59<br />
54<br />
76<br />
20GB Write<br />
15<br />
17<br />
21<br />
25<br />
36<br />
20GB Read<br />
15<br />
15<br />
20<br />
21<br />
30<br />
0 10 20 30 40 50 60 70 80<br />
SECONDS (SHORTER BARS ARE FASTER)<br />
Samsung SM951<br />
<strong>PC</strong>Ie AHCI<br />
Samsung SM951<br />
<strong>PC</strong>Ie NVMe<br />
Kingston HyperX<br />
Predator <strong>PC</strong>Ie<br />
Samsung XP941<br />
<strong>PC</strong>Ie AHCI<br />
Plextor<br />
M6e<br />
All these drives are faster than SATA-bound SSDs, writing a single large file, but the Plextor<br />
M6e is actually slower than some when it came to writing small files and folders.<br />
72
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