I only ran the 5G version of the test.
I too was surprised at the speed of the 840. The 840 spec (non-pro) does say max seq write = 330MB/s and Read = 530MB/s... Amazing how close to full speed I was able to get!
http://www.samsung.com/us/computer/memory-storage/MZ-7TD500KW-specs
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Propower do you have the 2,5" or the 3,5" Enclosure of the Thermaltake Silver River 5G ?
I got the 2,5" with a Samsung 830 128gb, and iam getting the following results:
[url=http://t.imgbox.com/aceLRYsk.jpg]Image[/URL]
apparently the 840 is performing better in the enclosure !
It is also the 2.5" enclosure (just got it Friday in case there is some firmware rev in the controller). Now the spec on the 128G SSDs is usually worse but I checked and you are definitely getting good but not as good speeds as the 840 (or the 830 spec). Is it registering on the "super speed USB3 bus" in system profiler?
Weird!
Xbench results Samsung 840 in Thermaltake Silver River 5G case.... WOW !!
esults 470.47
System Info
Xbench Version 1.3
System Version 10.8.2 (12C2034)
Physical RAM 16384 MB
Model Macmini6,2
Drive Type ASMT 2105
Disk Test 470.47
Sequential 289.92
Uncached Write 591.40 363.11 MB/sec [4K blocks]
Uncached Write 516.29 292.12 MB/sec [256K blocks]
Uncached Read 114.42 33.49 MB/sec [4K blocks]
Uncached Read 699.50 351.56 MB/sec [256K blocks]
Random 1247.15
Uncached Write 1297.27 137.33 MB/sec [4K blocks]
Uncached Write 713.13 228.30 MB/sec [256K blocks]
Uncached Read 2392.58 16.95 MB/sec [4K blocks]
Uncached Read 1622.75 301.11 MB/sec [256K blocks]
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Same test Internal Apple SSD... Crazy huh!
Disk Test 521.47
Sequential 338.78
Uncached Write 707.47 434.37 MB/sec [4K blocks]
Uncached Write 560.83 317.32 MB/sec [256K blocks]
Uncached Read 137.47 40.23 MB/sec [4K blocks]
Uncached Read 748.35 376.11 MB/sec [256K blocks]
Random 1131.82
Uncached Write 894.80 94.72 MB/sec [4K blocks]
Uncached Write 925.84 296.40 MB/sec [256K blocks]
Uncached Read 2300.75 16.30 MB/sec [4K blocks]
Uncached Read 1108.86 205.76 MB/sec [256K blocks]