I have been benchmarking my new Corsair Neutron GTX 240gb SSD in a few different configurations, mostly in external enclosures since I am trying to get a system for fast transfers. I seem to be getting really strangely slow read numbers for USB3, while write numbers are great.
I connected the drive to the mobo's Sata3 port as well to get a control point.
Intel i7 3930k @ 4.5ghz
Asus p9x79 deluxe mobo
GTX 680 video card (Asus OC model)
Samsung 830 256 SSD (Operating System drive)
32gb Gskill 2400 memory running X.M.P @2400
Corsair Neutron GTX 240gb SSD and 3 enclosure configs + internal
First up I tested the Neutron GTX using the Oyen Digital Minipro USB 3.0 Enclosure.
As mentioned, read speeds are strangely low... write speeds about what I expected.
Next I tried the same drive in the Silverstone RVS02 USB3 enclosure:
I also have an older BlacX eSata/USB2.0 dock I tested in eSATA mode as well:
Interesting that for all 3 cases, read is lower than write (though a bit less for eSata which is slower in general probably because of older chipset in the blacX usb2/esata model).
As a sanity check, I put the Neutron GTX into the Motherboard's Sata3 port and ran the same test again:
So the drive itself is definitely performing great, about what I expect. Well its not quite as fast as my 830 for reads but beats in a few other categories (I forgot to take a screenshot of the 830 benchmark and I am trying to not over-benchmark that one as its my OS drive).
So I also ran the SiSoftware Physical Disk benchmark. I ran it only using the GTX and Silverstone RVS02 enclosure.
Interestingly, that test gave me a read result of 280 MB/s. Around double the number CrystalDisk is giving me, and much more in line with what I expected out of USB3 and an SSD.
So is there some factor that explains why crystal disk is performing so low in these USB3 benches, while SiSoft is showing good numbers? Could it be some artifact with the USB3 on the x79 chipset? The only thing I have found which supports this theory is this x79 mobo review where the USB3 transfer speeds were really low, about what mine are:
I actually haven't seen alot of x79 motherboards with USB3 speed tested. For some reason those benchmarks seem much more common on Macintosh forums lately.
Thanks to anybody who has any ideas... even if its "ignore the benches"