Random BSOD on restart.

Computer Type: PC/Desktop
System Manufacturer/Model Number: custom
OS: windows 7 64bit
CPU: amd fx 8350
Motherboard: asus sabertooth 990fx r2.0
Memory: corsair 16gb
Graphics Card: sapphire HD 7870
Sound Card: n/a
Monitor(s) Displays: ASUS v428
Screen Resolution: 1920 x 1080
PSU: OCZ xtreme 700w
Hard Drives: Crucial m500
Browser: waterfox
Antivirus: ESET

Computer Type: PC/Desktop
System Manufacturer/Model Number: Own build (new) Desk1 / Asus ROG Win 7 / Desk2 1st build
OS: Desk1 7 Home Prem / Desk2 10 Pro / Main lap Asus ROG 10 Pro 2 laptop Toshiba 7 Pro Asus P2520 7 & 10
CPU: Desk1 i5 3750K / Laptop i7 GTX 860M / Desk2 i5 2500
Motherboard: Desk1 Asus P877-V / Desk2 Gigabyte H67 UD3H / Laptop ?
Memory: Desk1 8GB (1866) / Desk2 16GB (1333) / Laptop 8Gb DDR3
Graphics Card: Desk 1& 2NVidia GTX 650 & Laptops on board Intel
Sound Card: Desk 1 & 2 -XONAR DG Realtek High Def audio Laptop
Monitor(s) Displays: Desk 1 Benq HD 2450 / Desk2 Philips 24" / Laptop 17.5"
Screen Resolution: 1920x1080 D1 & D2 & Laptop 1
Keyboard: Desk 1 MS Sidewinder X6 Desk 2 MS Sidewinder X 4
Mouse: Desk 1&2 - Gigabyte MS 900 gamer - laptop - Logitec wireless
PSU: Desk 1 Corsair HX 1050/ Laptop ? / Desk 2 Corsair HX 650
Case: Desk 1 Cooler HAF XM ? Toshiba laptop / Desk2 Coolermaster
Cooling: Fans on all Desk1 -2 Desk2 - all Coolermasters 5 Laptop ?
Hard Drives: Desk1 Samsung 120GB 830 SSD Asus ROG 256GB 850 Pro SSD Desk2 Samsung 840 256 SSD Toshiba 120GB EVO
Internet Speed: ADSL2+
Other Info: One other Desktop (tester) and spare Toshba laptop both with SSD's Running Kaspersky 2016 ISS on all machines config'd identically Logitec audio stereo systems on each machine (x3) Canon MG5250MFC Router/modem TP-Link running WPA2SK