Hi. I'm from Russia, sorry for my bad english. Not so long ago, i'm buying eight core fx-150. OctalCore AMD FX-8150, 3926 MHz (19.5 x 201). Now, suddenly go to program manager, or whatever, and see that system seeng only four cores, not eight. What happend with my processor?

Depends on what operating system you are using.  With Windows 8 the 8150 is listed as a 4-core / 8-threaded chip by default.  On Windows 7 the chip is listed as 8-core / 8-threaded unless you have installed the Microsoft patch(s) for the AMD FX product-line (http://support.microsoft.com/kb/2645594), if so, then the chip will also be listed as 4-core / 8-threaded.

This was done to allow for better performance from the AMD FX CPUs by better managing how the CPU's scheduler is used.  There is plenty of information out there about this topic and most likely also in your native language.  Please do some research on it through common tech sites from Russia for a better understanding.  I'm sure that trying to read my verbiage here is not going to be easily understood, but I wanted to give you some basic information to get you started and pointed in the right direction.

Cheers! 

The opinions expressed above do not represent those of Advanced Micro Devices or any of their affiliates.
Requiescat In Pace AMD Processor Forums | Member since: 1/19/2009 | Post count: 4142
Please don't PM me with questions, instead create a thread so that everyone can assist and benefit from the knowledge provided. Thanks in advance!

So why is it that all my Win 7 rigs running with a FX8350 ( I have 3 ) all showing as 8 core - 8 threads in task manager even tho i have the patches installed ?

thx

Pics of my rig
FX-8350 @ stock, custom water cooling, 8Gig Corsair Dom 2133 9-11-10-27, Asus CH V Formula, SilverStone ST-1500 PSU, Auzentech X-Fi Prelude, Logitech Z-5500D , 1 x Water Cooled HIS 7970, Asus VW246H Monitor, Win 7 64Bit HP, Corsair 800D Case

I don't believe the Microsoft patch changed that.

Desktop: AMD Phenom II X4 955 @ 3.5GHz, Sapphire Vapor-X HD5870, ASUS M4A78T-E, 8GB Kingston/Mushkin DDR3-1333, 256GB OCZ Vertex 4, 2xSeagate Momentus XT 500GB Hybrid Drive (RAID0), ASUS Xonar Xense, Corsair HX750W, Antec Nine Hundred, Windows 7 Professional x64.

HP Touchsmart TM2: Intel Core i5 430UM, Hitachi 250GB 7200RPM HDD, ATI Radeon HD5450, 8GB Samsung DDR3-1333 (CL9), Windows 7 Professional x64.