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USB Attached SCSI (UASP) When using the AMD USB drivers for the motherboard with a UASP capable device it defaults to using the default USB Mass Storage Device (usbstor), same as a standard USB stick. With the backported Win8 drivers it's different. If you do not have a UASP driver installed (USB\Class_08&SubClass_06&Prot_62) then it will not find a driver by default. You can force install by manually selecting Universal Serial Bus Controllers - USB Mass Storage Device, or install a uasp driver. Note that some motherboards may have a deadlock issue when using the uasp driver during reboots with the USB adapter still connected. If you select Safe Remove, reboot works fine, otherwise it doesn't finish the reboot. You will need to use a deadlock patched version of the driver if thats the case. The following test is with a JMicron USB to PCIE adapter, VID152D PID0583 and a XG5 256GB NVMe. The Gen2 port on the B450 chipset and the Gen1 port on the B450 and on the Ryzen2. Drivers are the default XP usbstor 5.2.3790.5829, VIA uasp 6.1.7600.4002, and win8 uaspstor 6.2.9200.16384.

Samsung NVMe and SMART with CrystalDiskInfo The samsung nvme driver is able to display SMART data in XP/Win7. To get CrystalDiskInfo to work instead of crashing when you start it in XP/XP64 you will have stop it from using WMI. Open DiskInfo32 or DiskInfo64 with a hex editor, find where "\ \ . \ r o o t \ c i m v 2" is and change it to something like "\ \ . \ r o o t \ n o w m i". Tested on version 8.15.2 630069006D00760032 -> 6E006F0077006D0069 Samsung NVMe potential issues When I installed the latest nvidia 368.81 driver it caused the Samsung 3.3.0.2003 to stop working on XP64. @Andalu tested the same drivers on an Intel B250/GT730 and worked fine. After playing around with it, installing nvidia 355.98 appears to work/coexist with the Samsung NVMe driver on XP64. I've only tested on a GT710 so far but hopefully same result for my GTX750. Something to keep in mind if you have a amd/B450/gigabyte combo. On XP32 the Samsung driver did not work (code10), using the default non patched, or with the PAE patch /4GB. It did however work when PAE patched using /128GB or /all. Both with 355.98 and 368.81 Trim tests O&O Defrag 17.5 is the best from all the ones I tested. Works on SATA and NVMe SSDs. AMD/Samsung/nativeWin7 drivers were all able to TRIM. Can be run from CMD line so you can schedule it if you want. NVMe Trim ADataSSDToolbox doesnt see (Win7/samsung/SchtromOFA13 driver) TxBENCH see but no trim (Win7/samsung/SchtromOFA13 driver) SSDTool 0.95 see but trim didnt work (../../samsung) Naraeon5.4.0 win7 no see, SchtromOFA13 trim didnt work, samsung TRIM WORKS O&O Defrag 17.5 win7 TRIM WORKS, SchtromOFA13 see but no trim, samsung TRIM WORKS SSD Trim Naraeon5.4.0 AMD yes, Win7msahci yes, SchromAHCI no see, Win8ahci no see O&O Defrag 17.5 AMD yes, Win7msahci yes, SchromAHCI no trim, Win8ahci no trim used trimcheck0.7 to see if it worked (https://github.com/CyberShadow/trimcheck) *trimcheck x64 works also if Major/Minor changed from 6,0 *Naraeon has a "not a valid date and time error", doesnt affect functionality *O&O can be run from CMD line, needed to change Major/Minor from 6,0 down to 5,2 (or 5,1) to install Nvidia GPU driver & custom resolution Based on a few posts i found, Nvidia 355.98 is that last version where you can add custom resolution if for example you have a ultrawide screen or 4k monitor that you want to use. It looks like XP is limited to displayport HBR1 (8.64 Gbit/s). There is a bit of other stuff as well but roughly, horizontal pixels × vertical pixels × (3 × bits per color channel) × refresh rate in Hertz = Bits per second. Calculator https://tomverbeure.github.io/video_timings_calculator Ex: 2560 × 1600 × (3 × 😎 × 75 = 5898240000 bits/s / 1024³ = 6.86 Gbit/s 3840 x 2160 x (3 x 😎 x 40 = 7962624000 bits/s / 1024³ = 7.41 Gbit/s https://www.vogons.org/viewtopic.php?f=63&t=72471 http://wp.xin.at/archives/5616