AMD FX-8320 Vishera Clock Speed

I recently purchased an AMD FX-8320 Vishera. My motherboard is a Gigabyte GA-78LMT-S2P (Rev 5.0). I've been monitoring my CPU using CPU-Z and have noticed that it's stuck at 2.9 GHZ. My temperatures at idle are between 18C and 27C.

I went into the bios (had to update them because they were out of date) to check the clock speed and other settings. Clock ratio is set to Auto, which has the CPU at 2.9 GHZ. Cool n Quiet is set to Auto. C1E is off. Core Performance Boost is set to Auto at 4 GHZ with turbo off.

I tried several modern games and about 30 minutes of a torture test with prime95 in order to see if either the Cool n Quiet or Core Performance Boost would increase the core speed, but it continued to sit at 2.9 GHZ.

I'm wondering if the CPU is performing as intended, or if the automatic clocking features aren't working and I should try setting the clock speed manually. Any advice is appreciated. Thanks guys.

EDIT: Forgot to mention that while running games/prime95 the temperature did increase to around 37C at times.
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  1. Best answer
    Sorry, but... I do not sugarcoat... Soooo...

    The 760 chipset on that board does not fully support 8 core CPUs.
    It can barely handle the 6300, throttling on that board with an 8 core is to be expected.

    The CPU support list by Gigabyte also does not specifically mention support for that CPU, which should have been enough warning NOT to buy that cheap motherboard.
  2. Thanks for being not only straight-up but also incredibly quick to reply. I was recommended the FX-8320 by someone in my other post on this board, but it seems he didn't look into my motherboard too thoroughly and neither did I. I've had that motherboard for about a year now and it wasn't very expensive when I bought it, so it's time for a replacement.

    Do you have a suggestion for a motherboard under 200$ that would support a FX-8320? Here are the rest of my components.

    Power Supply: XFX Core Edition PRO650W (P1-650S-NLB9) 650W ATX12V 2.2 & ESP12V 2.91

    RAM: Kingston HyperX 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1600 Desktop Memory Model KHX1600C9D3K2/8G

    GPU: GIGABYTE GV-N660OC-2GD GeForce GTX 660 2GB 192-bit GDDR5 PCI Express 3.0 x16 HDCP Ready SLI Support Video Card

    Also, would it be safe to run the FX-8320 on this motherboard at 2.9 GHZ as long as the temperatures remain low?
  3. I would not run it in that board, unless I underclocked it manually to like 2.8GHz, however if something was to die, it would be the motherboard most likely. So if the board is disposable to you, then does not really matter, very slim chance of the CPU dying.

    Cheapest decent board : Can do mild overclocking.

    A bit better mobo for decent overclocking :

    And if you do rebate then this one is VERY much worth it at 150$, seriously nice board :

    EDIT : And thanks for NOT taking my directness as something personal, some people tend to be over-sensitive when you are tooo straight with them. :)
  4. My set up is as follows

    Case - Lian li PC10nb
    PSU - Corsair CP-9020055-UK RM Series RM750 80 Plus Gold 750W ATX/EPS Fully Modular Power Supply Unit
    Motherboard - Gigabyte 970A-UD3P Motherboard (AMD 970, SB950 DDR3, SATA, RAID, ATX, Gigabit Ethernet LAN, Socket AM3+)
    Graphics - AMD Radeon HD 7770 1020 MHz; 2 GB GDDR5 4800 MHz 128-bit
    SSD - Intel 530 Series 240GB Solid State Drive
    HDD - Seagate Momentus ST9750420AS - Hard drive - 750 GB - internal - 2.5" - SATA-3
    HDD - 1TB 3.5inch HDD
    DVD-RW & Blu ray player
    Memory - Kingston KVR16N11K2/16 16GB 1600MHz CL11 DDR3 Value RAM Memory Kit
    CPU - AMD FX8320 Black Edition 8 Core (3.5/4.0GHz, 8MB Level 3 Cache, 8MB Level 2 Cache, Socket AM3+, 125W, Retail Boxed)

    a lot of kit so that is why I need the 750watts. my temp is around 35c doing normal everyday stuff, browsing, watching movies etc. and when playing battlefield 4 I got it peaked at about 55c when using the stock cooler I was getting nearer 45c and the noise was terrible. the non stock heat sink/cooler I have is a Arctic Cooling Freezer 7 Pro Rev.2 CPU Cooler (amazon are selling it for £16.99 at the moment

    I get the full speed of the CPU at 3.5mhz (raising to 4gz when the system needs it) 2.9ghz that your getting must be down to using the motherboard your using, I would recommend the 970 or 990 chipsets for this processor, My mate as the 990 chip set and loves it, I am happy with my 970 chipset. but if you could I would recommend you getting a bigger PSU as well I would say around the 650watt or above don't get a cheep one though they are not always worth it.

    so my recommendations for you would be a 970 chipset motherboard and a 650watt power supply.

    I don't know what the prices are in the US but here in the UK, I spent £67.30 on the motherboard and £94.98 for the PSU (my 750watt Corsair one) you can spend about £70-£90 on a decent 650watt PSU.

    I hope this gives you an idea what you could do to resolve your issues with CPU speed and temps etc. Let me know if you get it sorted
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