This model does not support overclocking.
This model does not support overclocking.
Hey everyone, my friend has an OC4 X4 9850 on an Asus M3A MOBO. We're trying to push it beyond 2.5GHz, and I think a stable 3.0GHz should work. I'm not sure what changes we need to make in his BIOS settings—I'm a bit confused. Should I adjust anything like RAM timings or is there another way? Here are his RAM and CPU specs.
I kept the HT at its default setting (auto) for now. It will adapt automatically.
Increasing the CPU clock speed sometimes requires higher voltage (vcore) to keep up.
Regarding RAM speed, I don’t know much about the BIOS on that older board. Just try using the available settings to bring the RAM clock back close to its default.
Another factor could be the board itself. Although it’s of good quality, it wasn’t built for heavy overclocking. 4+1 phase power, no heat sinks on the VRMs...
There might be several reasons why you’re hitting your limits and can’t adjust further.
You need to boost the base clock (Bclk). The CPU clock speed equals Bclk multiplied by the CPU multiplier. When you raise Bclk, all components dependent on it will also speed up, including the memory.
You need to raise the base clock (Bclk). The CPU clock speed equals Bclk multiplied by the CPU multiplier. Increasing Bclk causes all dependent frequencies, like memory, to also rise. In BIOS, what is Bclk? We boosted our CPU to 2.9GHz by setting FSB to 235. Going beyond 235 prevents Windows booting. To reach 3.0GHz with an FSB of 240, what adjustments are required?
It's similar to the usual setup. Typically, the FSB is X times the Bclk. I believe the older AM2 platform had a FSB ratio of 2. Which motherboard are you running?
Sagexx :
clutchc :
Same issue here. Could you tell me which motherboard you're using?
I'm currently using an Asus M3A Mobo, and the maximum FSB we can reach is 237 without tweaking any other parameters.
Your RAM might be too fast now. You should lower the memory multiplier to match its rated speed as closely as possible.
If your board doesn't support a RAM multiplier, pick a slower option from the available ones.
Sagexx :
clutchc :
Same issue here. Could you tell me which motherboard you're using?
I'm using an Asus M3A Mobo, and the FSB speed is capped at 237 without adjusting any other parameters.
Your RAM might be too fast now. You should lower the memory multiplier to match its rated speed. If the board lacks a RAM multiplier setting, pick a slower one from the available options.
Also, the HT Link Speed is currently set to 2.0GHz as per some sources. Should we keep it at that value or switch to auto?
You mentioned you need to reduce the RAM speed—what does that option refer to? I checked the RAM timings in the BIOS and see the MHZ range goes from 470 to 1253, but I'm not sure how to adjust it further.
But to be honest, I believe 2.9 GHz is likely the upper limit for that CPU. I haven't managed to reach 3GHz before. Have you adjusted the voltage settings? We tried increasing the RAM voltage but still couldn't go beyond 235 for FSB. What voltage would you suggest raising? Since there are several options and they all auto-adjust, it's unclear what your default setting is, so I need to know how much to increase.