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| PCIe HD adapter |
Posted by: waynestewart on 2016-07-06 08:58:14
At the end of May I picked up a 2008 Mac Pro. I had a SSD from a dead Macbook Air that I didn’t have a use for so I was considering a local purchase of a PCIe adapter for $20 but the seller advertized it as non-bootable. Deal Extreme advertized one for $7 delivered and said nothing about bootability. So I thought I’d take a chance. I installed it last night and was able to boot off the OS that was on the drive.
Not sure if it's faster than the Samsung SSD I have in it but it is fast
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Posted by: omidimo on 2016-07-06 13:44:10
Probably faster than internal, since those are restricted to SATAII speeds.
Worth noting if the card is in PCI slot 2, you are getting awesome performance. slots 3 and 4 are 1.0 slots.
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Posted by: waynestewart on 2016-07-06 13:57:27
I got home pretty late last night so I didn't do too much. I'll try comparing drives tonight
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Posted by: waynestewart on 2016-07-09 13:06:07
I tried Xbench on them. The first is the SSD on SATA, the second is the MacbookAir drive on the card. The MacbookAir drive is a 128gb. I'd installed a 256gb drive from a water damaged machine into my Macbook Air freeing up this 128gb. I may put it back and use the 256gb in the Mac Pro. I rarely use the MacbookAir anyways
Results 492.89
System Info
Xbench Version 1.3
System Version 10.11.5 (15F34)
Physical RAM 8192 MB
Model MacPro3,1
Drive Type Samsung SSD 840 EVO 120GB
Disk Test 492.89
Sequential 311.71
Uncached Write 454.14 278.83 MB/sec [4K blocks]
Uncached Write 389.56 220.41 MB/sec [256K blocks]
Uncached Read 165.27 48.37 MB/sec [4K blocks]
Uncached Read 496.85 249.71 MB/sec [256K blocks]
Random 1177.06
Uncached Write 1031.57 109.20 MB/sec [4K blocks]
Uncached Write 711.35 227.73 MB/sec [256K blocks]
Uncached Read 4092.75 29.00 MB/sec [4K blocks]
Uncached Read 1284.05 238.27 MB/sec [256K blocks]
Results 594.11
System Info
Xbench Version 1.3
System Version 10.11.5 (15F34)
Physical RAM 8192 MB
Model MacPro3,1
Drive Type MacAir HD
Disk Test 594.11
Sequential 410.78
Uncached Write 551.46 338.59 MB/sec [4K blocks]
Uncached Write 513.86 290.74 MB/sec [256K blocks]
Uncached Read 198.54 58.10 MB/sec [4K blocks]
Uncached Read 1062.28 533.89 MB/sec [256K blocks]
Random 1072.98
Uncached Write 928.37 98.28 MB/sec [4K blocks]
Uncached Write 617.92 197.82 MB/sec [256K blocks]
Uncached Read 3928.05 27.84 MB/sec [4K blocks]
Uncached Read 1285.59 238.55 MB/sec [256K blocks]
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Posted by: waynestewart on 2016-07-11 08:02:09
I decided to use the 256gb SSD from the MacbookAir and was surprised at the difference. Would have thought the two SSDs would have been about the same
Results 822.90
System Info
Xbench Version 1.3
System Version 10.11.5 (15F34)
Physical RAM 12288 MB
Model MacPro3,1
Drive Type APPLE SSD SD0256F
Disk Test 822.90
Sequential 569.00
Uncached Write 1011.17 620.84 MB/sec [4K blocks]
Uncached Write 901.92 510.31 MB/sec [256K blocks]
Uncached Read 248.83 72.82 MB/sec [4K blocks]
Uncached Read 1094.80 550.24 MB/sec [256K blocks]
Random 1485.97
Uncached Write 1469.01 155.51 MB/sec [4K blocks]
Uncached Write 932.03 298.38 MB/sec [256K blocks]
Uncached Read 4123.51 29.22 MB/sec [4K blocks]
Uncached Read 1437.46 266.73 MB/sec [256K blocks]
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Posted by: rsolberg on 2016-07-11 15:34:33
It's not unusual to see 256GB-class SSDs offer significantly higher throughput over 128GB-class models, even of the same series due in part to a wider internal memory bus.
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