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

Answer»

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.


Quote

Processor 1ID = 0
Number of cores8 (max 8 )
Number of threads8 (max 8 )
NameAMD FX-8350
CodenameVishera
SpecificationAMD FX(tm)-8350 Eight-Core Processor
Package Socket AM3+ (942)
CPUIDF.2.0
Extended CPUID15.2
Core SteppingOR-C0
Technology32 nm
TDP Limit125 Watts
Core Speed1399.4 MHz
Multiplier x Bus Speed7.0 x 199.9 MHz
Rated Bus speed2199.1 MHz
Stock frequency4000 MHz
Instructions setsMMX (+), SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, SSE4A, x86-64, AMD-V, AES, AVX, XOP, FMA3, FMA4
L1 Data cache8 x 16 KBytes, 4-way set associative, 64-byte line size
L1 Instruction cache4 x 64 KBytes, 2-way set associative, 64-byte line size
L2 cache4 x 2048 KBytes, 16-way set associative, 64-byte line size
L3 cache8 MBytes, 64-way set associative, 64-byte line size
FID/VID Controlyes
Min FID7.0x
# of P-States7
P-StateFID 0x1A - VID 0x0A - IDD 13 (21.00x - 1.425 V)
P-StateFID 0x19 - VID 0x0B - IDD 13 (20.50x - 1.412 V)
P-StateFID 0x18 - VID 0x0D - IDD 12 (20.00x - 1.387 V)
P-StateFID 0x12 - VID 0x15 - IDD 10 (17.00x - 1.287 V)
P-StateFID 0xC - VID 0x1D - IDD 8 (14.00x - 1.188 V)
P-StateFID 0x5 - VID 0x27 - IDD 5 (10.50x - 1.063 V)
P-StateFID 0x10C - VID 0x31 - IDD 4 (7.00x - 0.937 V)

PStateReg0x80000186-0x0000141A
PStateReg0x80000186-0x00001619
PStateReg0x80000177-0x00001A18
PStateReg0x8000015F-0x00002A12
PStateReg0x8000014B-0x00003A0C
PStateReg0x80000136-0x00004E05
PStateReg0x80000124-0x0000624C
PStateReg0x00000000-0x00000000

Package Type0x1
Model00
String 10x0
String 20x0
Page0x0
Base TDP6 Watts
Boosted P-States2
Max non-turbo ratio20.00x
Max turbo ratio21.00x
TSC4000.1 MHz
MPERF4000.2 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





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