AMD FX8320 throttles well at good temperatures on water.
AMD FX8320 throttles well at good temperatures on water.
Hi everyone,
I've been experiencing a problem where my AMD-FX 8320 starts throttling down from 4.4Ghz to as low as 3.6Ghz in HW Monitor (the latest version installed).
My temperatures are normal, usually around 50°C max, and all power-saving settings in my BIOS are turned off.
Here are my details:
- AMD FX8320 OC'd to 4.4Ghz
- Gigabyte 990FXA UD3 Rev 4.0 AM3+ Mobo (latest F3 BIOS)
- 4x4GB (16GB) Ripjaws X DDR3 1600MHz @ 9-9-9-24(33)
- Corsair RM750X PSU
- Corsair H90 AIO Liquid cooler 140mm Rad
- Asus Strix 1050ti
- Samsung 850 Evo SSD
- Windows 10 Home
I've run Prime95 many times and never faced any problems. This setup has been running for over 4 months, 8+ hours daily, with no issues so far. I'm only seeing throttling, not crashes or other problems.
NOTE: When playing CSGO (Source Engine), my CPU usage spikes to 100% across all 8 cores. It's unclear if this is just optimization or something else.
- My FSB is at the stock 200Mhz.
- CPU Multiplier is set to 22 (22x200=4400).
- BIOS CPU voltage is 1.38125, while HWMonitor shows 1.404 and 1.44 during games.
- Load Line Calibration is set to Extreme.
- C6E state is disabled.
- APM (Advanced Power Management) is off.
- Cool n' Quiet is off.
- Turbo Boost is off.
- CPU Unlock is off (tried both on and off, no change).
If you have anything else, just let me know and I'll check again in my BIOS.
This is really frustrating, but I'm sure it's just a minor thing. Thanks for your help!
TheDecentGatsby tried it but got stuck at the Windows loading screen. They changed the BIOS voltage to 1.35v and set the CPU to 4.0Ghz, but it only dropped to 1.9Ghz before lowering the CPU further. They think something is wrong and suggest raising the voltage back to 1.4v with medium LLC settings. They also note their current LLC options are Extreme, Auto, Normal, Standard, and Low, and that other modes weren't stable unless using Extreme.
When using LLC at elevated levels, it might lead to the VRM warming up and resulting in throttling. At lower levels, it helps reduce vdroop somewhat. However, setting LLC to high can actually produce voltages beyond what the BIOS specifies, which affects the VRM negatively.
Vellinious :
With LLC on such high levels, the VRM might start heating up and lead to throttling. At low LLC settings, the voltage drop will be slightly reduced. At high LLC settings, it can actually produce higher voltages than the BIOS specifies—but this comes at the cost of the VRM.
Interesting. I used to be sure the large heatsinks on this motherboard would handle it, but maybe this is the problem. I mean, it makes sense. I already have my radiator on the back of the case and it's right above the VRMs. Perhaps I should mount it on top of the case and test it. Thanks!
Any other input would still be welcome regarding this issue.
I would increase your base voltage and apply medium LLC configurations.
If the issue isn't related to the VRM heat, I'm uncertain about other potential causes.
Could you clarify what you mean by 'base' voltage?
TheDecentGatsby:
Vellinious:
I'd increase your base voltage and apply medium LLC configurations. If the issue isn't related to the VRM heat, I'm uncertain about other potential causes. Could you clarify what you mean by 'base' voltage? Your CPU's voltage. With the LLC on extreme, it's at 1.404, but the BIOS shows 1.38v. I'd adjust it slightly higher, set the LLC to medium, and check stability again.
Tried it. It won't proceed past the Windows loading screen. I switched LLC back to Extreme, reduced BIOS voltage to 1.35v and adjusted the CPU to 4.0Ghz...we'll see. I'm not sure what's happening. It dropped to 1.9Ghz just before lowering the CPU speed.