No issues with my Engineering CPU. Everything works great. The QFQK is an Qualitiy Sample with same Clockspeeds and Spezifications like the Original CPU.
Example:
2x 3GHz (2 Core Turbo)+ 12 x2,5GHz
or
14x 2,7GHz (all Core Turbo)
Reason works very well on Multicore Systems. And for me there is nothing wrong with that kind of CPU
But it is not legal to sell one.
If your friend can get one --> buy one!
Attantion to the Stepping!! The QFQK is C0/C1 and not all motherboards can run that Stepping!!!!!!!!!
You really have to Check your motherboard!!!
Here is a Link to my motherboard CPU Support List:
http://www.asrock.com/mb/Intel/X99%20Ex ... sp?cat=CPU
You can see it is nearly possible to run most of the Engineering CPUs.
For example, a Gigabyte motherboard can not run the Stepping C1/C0 nor the E5-2683v3 !!!
http://www.gigabyte.us/support-download ... x?pid=5125
The MSi Raider X99 can only run the Original CPU! But can not run C0 Stepping on a E5-2683v3 (Stepping: QEY7).
https://de.msi.com/Motherboard/support/ ... upport-cpu
So, at First step: Watch your Mainboard CPU Support List !!!
Further Information:
QEY7 = very First Stepping C0 (Engineering Sample) and CPUz show the CPU just as Xeon E5 Genuie Intel
http://i.ebayimg.com/images/i/152173458 ... -l1000.jpg
Also the clockspeed is reduced (-200MHz)
And Turbo Speeds are reduced!!
QFQK = 2nd Stepping C0/C1 (Quality Engineering Sample) and CPUz Show the CPU as Xeon E5-2683v3 (ES) - Same clockspeed like Original CPU
QGN5 = Last Stepping C1 - CPU with same Stepping like SR1XH (Original E5-2683v3)
SR1XH = Original Intel Xeon E5-2683v3 (Stepping C1)