Check the safe overclocking temperatures and voltages for AMD 955 Phenom II.
Check the safe overclocking temperatures and voltages for AMD 955 Phenom II.
With continuous operation this system requires specific temperature and voltage settings. The room temperature should remain between 72-75°F throughout the year. Currently, switching to a liquid cooling setup has helped maintain stability at 3819.3MHz and 1.50 Volts, where temperatures stay around 96-100C. Under heavy load, temperatures drop to about 52C during idle but reach up to 56C after 24 hours. At 3900.0MHz the system remains stable, though voltages need adjustment to 1.65V. Running at 3.9GHz it operates between 39-41C with loads reaching 58C. AMD recommends a maximum of 62°C. Please consider these guidelines and note the fan performance.
my Phenom maintains a steady 42C at 3.8ghz idle. It can reach up to 56C or 57C during prime time or rendering tasks. I'm using the Mugen 2 cooler, but it seems I didn't need to increase the voltage for 3.8ghz performance. To keep stability, I raise it to 4.0ghz when needed. 4.1ghz is a bit challenging and gets too hot for me.
I'd recommend keeping the temperature below 60C continuously for optimal performance. I regularly render or animate at 3.8ghz/56C without any problems.
godless :
my Phenom stays at 42C with 3.8ghz idle. It reaches up to 56C/57C during prime or rendering. I'm using the Mugen 2 cooler, but it seems I didn't need to increase the voltage to hit 3.8ghz. To stay stable, I have to bump it up to 4.0ghz. 4.1ghz is a bit challenging and too hot for me.
I believe staying below 60C for 24/7 should be fine. I consistently render or animate at 3.8ghz/56C without any problems.
I thought adjusting the voltage was necessary, but with my 945 on air, I haven't needed to change it even at 3.6GHz. Maybe I'm still getting used to this MSI BIOS. I plan to try again later.
The speed setting is too high for that motherboard. Usually 1.5/1.53v works better for 3.9/4.0Ghz... But it really depends on the board. For temperatures, you should not exceed 65°C. With your waterblock setup, you should be seeing around 48°C max at 4.0Ghz and 1.525v (room temp 28°C). Yesterday I tried a 955be with an AC Freezer 64 (AIR) and temperatures never got to 54°C at 4.0Ghz and 1.525v. What kind of paste did you use for the waterblock? Also, could you share your BIOS details—specifically CPU, NB, SB, and chipset voltage? By the way, you have a really good PC there [:jaydeejohn:5]
No, it's not that. He just needs to adjust the Bios settings until he discovers his ideal setting... This is typical, especially when using a new graphics card with unclear Bios information. The same happened to me last year after switching my card. Just keep practicing until you're comfortable.
The clock speed of 1.65v is significantly too high for that processor. Generally, a range of 1.5/1.53v is recommended for 3.9/4.0Ghz... However, it really varies depending on the motherboard. Regarding temperatures, you should not exceed 65°C. With your current setup, you should expect around 48°C maximum at 4.0Ghz and 1.5v under load.
Yesterday I tried a 955be with an AC Freezer 64 (AIR) and the temperatures never reached 54°C at 4.0Ghz and 1.525v (ambient at 28°C).
What type of paste did you apply to the waterblock? Could you share your BIOS details, including CPU, NB, SB, and chipset voltage?
By the way, you have a really impressive PC there [:jaydeejohn:5].
I’m struggling with stability at 3.8GHz unless I set the CPU voltage to 1.52V. Even at 1.51V it doesn’t hold. I’ve experimented with the Multiplier, changed FSB, and mixed both settings. I’m using a ZALMAN ZM-STG1. The CPU is currently set to 1.52V. It’s running on an MSI 790FX-GD70 NB with auto settings for both CPU voltage and SB. The chipset voltage is also auto. I haven’t increased the chipset voltage because I didn’t push it too hard initially and used the multiplier. Current configuration:
My profile indicates a CPU voltage of 1.52V, yet both CPUZ and Hardware Monitor display values around .1 to .2 volts lower. Under load, the difference remains minimal.
here's my screenshot if it helps you a bit.
http://img513.imageshack.us/img513/9163/...save1p.jpg
godless :
here's my screenshot if it helps you a bit.
http://img513.imageshack.us/img513/9163/...save1p.jpg
Thanks, I'm trying to drop the multiplier and push on the FSB and so far i can run at 1.45V Stable.
http://i900.photobucket.com/albums/ac209...2a7181.png