Thought I had a PSU issue, but I guess its normal for core voltage to change

[DaveLembke]

Finally got my newest gaming system all built.

Found out that sleep mode causes BSOD and so I disabled sleep mode. Other than that it runs fine and FAST 

I decided to run CPUZ to see what the voltages were reporting etc and while running CPUZ I saw my core voltage swing from .937 Volts to 1.425 Volts with voltages in between these values changing about once every few seconds.

I decided to save the information to text file and look at the raw data collected from CPUZ and thats when it caught my eye that this is normal and not a power supply or VRM issue.

I figured I'd share this here in case anyone else doesnt know that this is normal for different power states based on an AMD Cool'n Quiet config like I am running to underclock and undervoltage the CPU when processing demands are lower.

Processor 1         ID = 0
   Number of cores      8 (max 8 )
   Number of threads   8 (max 8 )
   Name         AMD FX-8350
   Codename      Vishera
   Specification      AMD FX(tm)-8350 Eight-Core Processor           
   Package       Socket AM3+ (942)
   CPUID         F.2.0
   Extended CPUID      15.2
   Core Stepping      OR-C0
   Technology      32 nm
   TDP Limit      125 Watts
   Core Speed      1399.4 MHz
   Multiplier x Bus Speed   7.0 x 199.9 MHz
   Rated Bus speed      2199.1 MHz
   Stock frequency      4000 MHz
   Instructions sets   MMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, x86-64, AMD-V, AES, AVX, XOP, FMA3, FMA4
   L1 Data cache      8 x 16 KBytes, 4-way set associative, 64-byte line size
   L1 Instruction cache   4 x 64 KBytes, 2-way set associative, 64-byte line size
   L2 cache      4 x 2048 KBytes, 16-way set associative, 64-byte line size
   L3 cache      8 MBytes, 64-way set associative, 64-byte line size
   FID/VID Control      yes
   Min FID         7.0x
   # of P-States      7
   P-State         FID 0x1A - VID 0x0A - IDD 13 (21.00x - 1.425 V)
   P-State         FID 0x19 - VID 0x0B - IDD 13 (20.50x - 1.412 V)
   P-State         FID 0x18 - VID 0x0D - IDD 12 (20.00x - 1.387 V)
   P-State         FID 0x12 - VID 0x15 - IDD 10 (17.00x - 1.287 V)
   P-State         FID 0xC - VID 0x1D - IDD 8 (14.00x - 1.188 V)
   P-State         FID 0x5 - VID 0x27 - IDD 5 (10.50x - 1.063 V)
   P-State         FID 0x10C - VID 0x31 - IDD 4 (7.00x - 0.937 V)

   PStateReg      0x80000186-0x0000141A
   PStateReg      0x80000186-0x00001619
   PStateReg      0x80000177-0x00001A18
   PStateReg      0x8000015F-0x00002A12
   PStateReg      0x8000014B-0x00003A0C
   PStateReg      0x80000136-0x00004E05
   PStateReg      0x80000124-0x0000624C
   PStateReg      0x00000000-0x00000000

   Package Type      0x1
   Model         00
   String 1      0x0
   String 2      0x0
   Page         0x0
   Base TDP      6 Watts
   Boosted P-States   2
   Max non-turbo ratio   20.00x
   Max turbo ratio      21.00x
   TSC         4000.1 MHz
   MPERF         4000.2 MHz

The final end result for my hardware with this build which was a tight budget was the following:

Gigabyte AM3+ Motherboard 78LMT-USB3 125Watt TDP $58.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16813128565&cm_re=gigabyte_78lmt-usb3-_-13-128-565-_-Product

AMD FX-8350 CPU ( 8-core ) 4.0Ghz 125Watt TDP $139.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16819113284&cm_re=amd_8_core-_-19-113-284-_-Product

Crucial Ballistix Sport DDR3 1600 8GB  $54.00 http://www.newegg.com/Product/Product.aspx?Item=9SIA0ZX2C40289&cm_re=crucial_ballistix_sport_8gb-_-20-148-540-_-Product

EVGA Geforce GTX 260 Core 216 ( $40 used ) http://www.newegg.com/Product/Product.aspx?Item=N82E16814130370

Corsair F40 SATA II SSD 40GB $29.99 ( Windows 7 only on this drive ) http://www.newegg.com/Product/Product.aspx?Item=N82E16820233130&cm_re=corsair_F40-_-20-233-130-_-Product

Seagate ST3120215ACE IDE ATA100 HDD 120GB ( $9.99 refurb ) ( Games and Data on this drive ) - Slave ( Note: I only paid $9.99 for drive at newegg and it only had 5 hours on it according to smart data. So its not one of those 30k hour refurbed drives from a datacenter etc ) http://www.newegg.com/Product/Product.aspx?Item=N82E16822148691

LG GDR-H30N DVD-ROM  IDE ATA100 - Master $14.99 http://www.geeks.com/details.asp?InvtId=BLK-GDR-H30N-DO-R

Corsair CX600 Power Supply $29.99 after $20 rebate http://www.newegg.com/Product/Product.aspx?Item=N82E16817139028&cm_re=cx600-_-17-139-028-_-Product

Windows 7 Home Premium 64-bit $99.99 http://www.newegg.com/Product/Product.aspx?Item=N82E16832416806&cm_re=windows_7_64-bit-_-32-416-806-_-Product

Mid Tower ATX Case similar to this one $14.99, but cant find exact model. I ended up yanking a Pentium E5400 2.7Ghz in an ASUS ATX board out of this to repurpose it for the new build since the Pentium E5400 was just about never used. Saved the motherboard in case my wifes Core 2 Duo ever dies to do a board swap. http://www.newegg.com/Product/Product.aspx?Item=N82E16811208058&cm_re=mid_tower_case-_-11-208-058-_-Product


All comes to $492.92