The Sonnet Allegro Pro USB 3.0 PCIe 4x card arrived today.
After a struggled to find drivers that actually work for Windows 7, the latest drivers resulted in a "code 37" and Windows couldn't start the driver, things are humming along VERY nicely compared to my previous read times:
18:14:00.120 - 1% done (0TB 1GB), avg.'1 MB/s'
18:14:02.921 - 13% done (8TB 759GB), avg.'653 MB/s', eff.'763 MB/s'
18:14:05.239 - 23% done (16TB 7GB), avg.'699 MB/s', eff.'763 MB/s'
18:14:07.314 - 35% done (24TB 455GB), avg.'778 MB/s', eff.'994 MB/s'
18:14:09.108 - 45% done (32TB 244GB), avg.'832 MB/s', eff.'1059 MB/s'
18:14:11.271 - 56% done (39TB 998GB), avg.'840 MB/s', eff.'875 MB/s'
18:14:13.595 - 67% done (47TB 978GB), avg.'839 MB/s', eff.'838 MB/s'
18:14:14.265 - read 'H:/burst/plots' (8TB 1GB) in '14s 612ms'
18:14:14.327 - read 'I:/burst/plots' (8TB 1GB) in '14s 674ms'
18:14:15.902 - 78% done (55TB 928GB), avg.'840 MB/s', eff.'841 MB/s'
18:14:17.467 - read 'E:/Burst/plots' (3TB 900GB) in '17s 814ms'
18:14:18.944 - read 'P:/burst/plots' (4TB 0GB) in '19s 291ms'
18:14:19.002 - 89% done (63TB 913GB), avg.'806 MB/s', eff.'629 MB/s'
18:14:19.650 - read 'G:/burst/plots' (7TB 997GB) in '19s 999ms'
18:14:20.716 - read 'J:/burst/plots' (8TB 1GB) in '21s 64ms'
18:14:20.810 - read 'F:/burst/plots' (7TB 997GB) in '21s 156ms'
18:14:22.728 - read 'M:/burst/plots' (8TB 0GB) in '23s 76ms'
18:14:22.741 - read 'L:/burst/plots' (8TB 0GB) in '23s 87ms'
18:14:22.812 - 100% done (71TB 899GB), avg.'757 MB/s', eff.'511 MB/s'
18:14:22.818 - read 'K:/burst/plots' (8TB 0GB) in '23s 167ms'
18:14:23.062 - FINISH block '383828', best deadline '1230', round time '23s 170ms'
~87s when using the USB3 1x card in a PCIe Gen1 slot
~50s when using the USB3 1x card in a PCIe Gen2 slot
~23s when using the USB3 4x card in a PCIe Gen2 slot (This is the new Sonnet Allegro Pro card)
I'm amazed at how big of an improvement the PCIe 4x card was. Even though the card was kinda pricey, I'm very happy with the purchase!
If anyone else stumbles upon this, and grabs one of these Sonnet cards to be used on Win7, these are the drivers that actually worked for me:
Fresco Logic USB 3.0 Driver 220.127.116.11 64-bit