How to overclock phenom 9650 2.3 GHz quad core?

October 24, 2018 at 11:06:53
Specs: Windows 7, 8
Hello. I have a phenom 9650 quad-core processor clocked at 2.3 GHz (Worth 125 Watts Native Cooling from AMD FX 8350), Windows 7 ultimate x64 bit, 8 GB DDR2 800 MHz, Video card GeForce GT 9600 512 MB, ASUS m2n68 motherboard, GameMax power supply 650 watts. So, I have questions. How to properly overclock the processor to 2.6-2.8 GHz? What do you need for this, what should you expect in the process of overclocking? And what will be the consequences as a result of overclocking this processor on a permanent basis?

P.S. Yes, I know that in 2018 to have this configuration is shameful. But the situation of the currency in Ukraine does not allow to roam.

message edited by Johnny_Tedesco


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#1
October 24, 2018 at 13:37:35
The 1st gen Phenoms were not known as good overclockers. Make sure you have BIOS version 1001. After updating the BIOS, try the following BIOS settings:

Under Advanced > JumperFree Configuration:
- CPU Overclocking - manual
- CPU Frequency - 250MHz
- PCIE Overclocking - manual
- PCI-Express Frequency - 100MHz
- Processor Frequency Multiplier - x10.0
- Memclock Value - 333MHz

See if there's a setting for NB frequency or HT bus. If it's a multiplier, set it to 4.0x; if it's a speed, set it to 800MHz. And if you run across any Spread Spectrum settings, disable them.

If the above settings work, the CPU will run at 2.5GHz, the memory at 416MHz, & the HT bus at 1000MHz. If the system becomes unbootable, you'll have to unplug the power cord & reset the BIOS, then start over again from scratch.



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#2
October 25, 2018 at 08:35:38
I tried to overclock according to your instructions, but, unfortunately, the system did not start, and I had to slightly change your configuration to this:
-CPU Frequency - 240 MHz
-PCI-Express Frequency - 100 MHz
- Processor frequency multiplier - x11.5
- Memclock value - 333 MHz
- Raised the Voltash on the processor and NB at 0.05 Watt
But ht link shows the frequency of 712 MHz, and not 1000 as you said (put 800 according to your instructions).

P.S. Screenshots from CPU-Z and Core Temp: https://ibb.co/eaykyA

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#3
October 25, 2018 at 08:45:43

I just did a test of the stability of the system, and the computer just simply hung up, and after the restart it did not want to wind up on the changed configuration. Now I don’t know what to do.

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#4
October 25, 2018 at 17:59:16
I'll try to break down the theory to overclocking A64s & Phenoms.

Unlike Intel CPUs from the same era, AMD CPUs do not use a FSB. If you had an Intel CPU that ran at 2.0GHz (20 x 100MHz) & you changed the clock settings to 10 x 200Mhz, the CPU would still run at 2.0GHz but would be significantly faster because the FSB speed would be doubled. An AMD A64 or Phenom at 2.0GHz would perform the same regardless of the settings - 20 x 100, 10 x 200, or 8 x 250; all would perform the same. What makes it tricky is every time you change the CPU multiplier, you change the memory speed; & every time you change the CPU reference clock, you change the HT bus speed (HT bus is the product of the HT multiplier x the CPU reference clock). Raising the HT bus too high results in instability, so the HT multiplier needs to be lowered to compensate for the higher reference clock. (stock multiplier is 5x, stock HT bus is 1000MHz).

Here's a few different 2.3GHz configs to show you the effects:

Stock - 11.5 x 200MHz = 2.3GHz, HT bus @ 1000MHz, memory @ approx 768MHz (384MHz frequency)
Alt 01 - 11.0 x 209MHz = 2.3GHz, HT bus @ 1045MHz, memory @ approx 836MHz (418MHz frequency)
Alt 02 - 10.5 x 219MHz = 2.3GHz, HT bus @ 1095MHz, memory @ approx 836MHz (418MHz frequency)
Alt 03 - 10.0 x 230MHz = 2.3GHz, HT bus @ 1150MHz, memory @ approx 920MHz (460MHz frequency)

What you need to find is the best combination of BIOS settings that will run the CPU at a high clock speed while keeping the HT, RAM, & PCIE buses as close to stock speed as possible. Raising the CPU & NB voltages may or may not be required. You should not increase them unless absolutely necessary.

Your clock settings of 11.5 x 240 will run the CPU @ 2.76GHz. With the memory set at 333MHz, the resulting RAM speed is 788MHz (394MHz frequency) which is a little slower than stock. If you had left it on AUTO or 400MHz, the RAM would attempt to run at 460MHz, but it's doubtful it would work, that's why 333MHz is the correct choice. The stock multiplier for the HT bus is 5x, so if no change is made, it will run at 5 x 240 = 1200MHz which is too high. Lowering the multiplier to 4x would put the speed at 960MHz which is stable & not significantly slower.

If you were to set the CPU reference clock to 250MHz like I suggested & the lower HT multiplier to 4X, the HT bus would be 1000MHz, which is what you should be shooting for. 10 x 250MHz with RAM setting at 333MHz & HT multi at 4 x would be:

10.0 x 250MHz = 2.5GHz, HT bus @ 1000MHz, memory @ approx 832MHz (416MHz frequency). Your DDR800 RAM should be able to tolerate the slight overclock. If you want faster:

10.5 x 250MHz = 2.625GHz, HT bus @ 1000MHz, memory at approx 808MHz (404MHz frequency).
IMO, these settings should probably be your goal.

Anyhow, your CPUZ screenshot only shows me a portion of what I need to know. A screenshot showing what's listed under the memory tab would be helpful. As for the HT bus, 712MHz is obviously too low; you somehow got the multiplier set to 3x. I don't know what HT BIOS settings you have available but usually: 600 = 3x, 800 = 4x, 1000 = 5x.


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#5
October 26, 2018 at 01:01:55
After reading your message, I decided to delve into the BIOS settings, but did not find the reason why HT operates at a frequency of 712 MHz. For the sake of experiment, I decided to change a bit the configuration. But, unfortunately, it gave nothing.
P.S. Here is a screenshot of what you asked for: https://ibb.co/fyZ2DA

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#6
October 26, 2018 at 01:20:58
I also noticed such an unpleasant problem. With a short-term load on the CPU, the system simply hangs from scratch, for which you have to restart the PC. Just tried to change the configuration of JumperFree Configuration, but to no purpose.

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#7
October 26, 2018 at 03:13:28
Finally! After many attempts, we managed to find the optimal configuration for overclocking and solve the problem with the HT-link. Here is the configuration itself:
-ChPU Frequency - 234 MHz
-PCI-Express Frequency - 100 MHz
- Processor frequency multiplier - x11
- Memclock value - 333 MHz
- Raised the Voltash to a 0.05 W processor (NB did not touch, returned it to automatic mode)
- HT put a link to 1000 MHz (I do not know how it is calculated, but now it is a normal frequency of 928 MHz, instead of 712 MHz (800 in the BIOS), and if you put it on the car, in general it gives 1000 without overclocking ( As I understand it, the multiplier is different, that is, 800 MHz - 200 * 3, 1000 MHz - 200 * 4)

P.S. Screenshot from CPU-Z: https://ibb.co/cGENwV


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#8
October 26, 2018 at 04:51:28
You should shoot for 10.5 x 250.

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#9
October 26, 2018 at 05:54:40
If I set the bus above 240 MHz, the system will not start. This does not help even if you increase the voltage on the processor, bridges and socket

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#10
October 26, 2018 at 10:18:39
Try this as an experiment.

CPU freq @ 250
CPU multi @ 9x
HT multi @ 4x
RAM @ 333
PCIE @ 100

That will tell you if the 250 setting is the problem or not.


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#11
October 26, 2018 at 10:54:21
Well, I will write after some time about your recommendation.

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#12
October 27, 2018 at 06:39:06
As expected, it did not start with your configuration.

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#13
October 27, 2018 at 11:29:33
OK, so what does that tell you? The CPU isn't the problem because at 9 x 250 it's actually underclocked. If you're sure the other BIOS settings were correct, it means the weak link is the motherboard.

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#14
October 27, 2018 at 11:52:32
Probably. I will not argue, because I do not quite understand the motherboards, to be more precise, which is able to accelerate well, and which one is not.

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