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Overclocking FX 8320 Live, Voltage from monitors indicate voltage is far below BIOS settings. Vdrop or PSU?

post #1 of 5
Thread Starter 
First of all, this is my first post on this website, and I read the stickies about Rules but let me know if I need to change anything!
I'm an active member on Tom's Hardware but I just couldn't find answers and then I found this site.

I like to play FSX and other sim games like that but its very heavy on the CPU and framerate is terrible right now even with the FX 8320 and I'm looking at building a system that will more or less be good for the next 3 years. I was about to hit the checkout button on an I7 4770k and a Z87 board but I decided to try to over clock first to see how much it would help.

After starting the overclock it looks like the voltage that I specify in BIOS is having no impact on the actual voltage supplied, any thoughts? Is this a nonissue or are there any ways I can hone in on problem?

Here's my current rig:
  • FX 8320 8 Core Processor
  • EVGA GTX 760 2Gb GPU
  • 8Gb Gskill DDR3 Ram
  • GA-970a-ud3 v1.0 Mobo
  • Mod Xtreme Pro 600W PSU
  • 120Gb Samsung EVO SSD
  • 500Gb 7200rpm barracuda
  • Hyper 212 EVO CPU Cooling Fan

Current BIOS settings:
  • AMP-Disabled
  • Turboboost- Disabled
  • C1E- Disabled
  • Virtualization- Disabled
  • AMD K8 Kool and Quiet- Disabled
  • CPU Core Voltage Control- Manual
  • CPU Clock control- Manual
  • CPU Core Control- Manual
  • *Everything else, stock performance settings (C6 enabled etc)*

Current Overclock Run:

BIOS settings:
CPU Clock: 4.2Ghz
CPU Core Voltage: 1.38V

CPU-z and HW Monitor Readings (Prime95 running):
CPU Clock: Constantly holding at 4.2Ghz (No throttling)
CPU Core Voltage: Constantly holding at 1.28V
Temperature (HWMonitor):
Temp0: 34deg (Assuming a core temp)
Temp1: 47deg (Assuming a core temp)
Temp2: 61deg (Assuming a core temp)
CPU package temp: 49deg (Assuming CPU Temp)


Further observations: With Prime95 running, applications are working OK. No blue screen or terrible freezing, but moving desktop window around is not fluid and is very glitchy motion. No failed Prime95 tests
Edited by rolandod3 - 4/3/14 at 12:09am
post #2 of 5
What program are you using to monitor voltages ? I would think the Gigabyte one would be pretty accurate compared to the readings in bios.
Quote:
Mod Xtreme Pro 600W
This is probably what is causing you problems.
Output
+3.3V@25A, +5V@25A, +12V1@18A, +12V2@18A, -12V@0.3A, +5VSB@2.5A

You only have 18A on any one rail. Assuming your using one of those 18A rails to feed the GTX 760, that leaves 18A X 12 = 216 watts for the rest of your motherboard. An overclocked FX 8320 (or overclocked I7 4770k) can push more than 300 watts easy.
If your 12v rail reading looks very low, this is the reason.
    
CPUMotherboardGraphicsRAM
FX-6300 @ 4.9ghz M5A99X EVO R2.0 PNY 2gb NVIDIA GeForce GTX 650 PNY DDR3-1600 9-9-9-24 2X4gb 
Hard DriveHard DriveHard DriveHard Drive
Intel 330 SSD Samsung HD103SI Samsung HD204UI X 2 esata externals  Western Digital WD5000AAKX  
Optical DriveCoolingOSMonitor
Optiarc DVD RW AD-7280S Cooler Master Hyper 212 plus Windows 8.1.1 pro with media center Funai 32inch LED HDTV 
KeyboardPowerCaseMouse
Microsoft Comfort Curve 2000 Corsair CX600 Custom twin full tower, 12 - 5 1/4 bays total Logitech M510 
Mouse PadAudioAudio
Combo Mouse Pad, Calculator, USB ports USB stereo speakers Custom 5.1 digital sound system 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
FX-6300 @ 4.9ghz M5A99X EVO R2.0 PNY 2gb NVIDIA GeForce GTX 650 PNY DDR3-1600 9-9-9-24 2X4gb 
Hard DriveHard DriveHard DriveHard Drive
Intel 330 SSD Samsung HD103SI Samsung HD204UI X 2 esata externals  Western Digital WD5000AAKX  
Optical DriveCoolingOSMonitor
Optiarc DVD RW AD-7280S Cooler Master Hyper 212 plus Windows 8.1.1 pro with media center Funai 32inch LED HDTV 
KeyboardPowerCaseMouse
Microsoft Comfort Curve 2000 Corsair CX600 Custom twin full tower, 12 - 5 1/4 bays total Logitech M510 
Mouse PadAudioAudio
Combo Mouse Pad, Calculator, USB ports USB stereo speakers Custom 5.1 digital sound system 
  hide details  
Reply
post #3 of 5
Thread Starter 
Alright so here's an update that hopefully helps narrow down the search, my APM setting was still enabled. After disabling, I see no more fluctuations, I'll update the data above accordingly but the clock is holding steady at 4.2Ghz, and Voltage is no longer fluctuating as well but its still only providing 1.28V while set in BIOS at 1.38 now. It seems temp2 is getting hot real fast now.

I've checked 12V rail voltages and they look good, unfortunately I'm real confused on how exactly PSUs work etc. Below is a picture of the current test:

Edited by rolandod3 - 4/3/14 at 12:30am
post #4 of 5
Have you tried LLC?
post #5 of 5
Thread Starter 
Unfortunately my board doesn't have an LLC setting, its v1.0. This also might be a dumb question but Core temp is saying highest temp is 48deg on the Cores, HW Monitor is saying that "Package" temp is 49deg, as well. So what is temp2 on the HW monitor that says 61deg since its scaling with CPU usage it seems?
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