AMD Phenom II x4 965 overclocking

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monitobeko

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Hello, I have a few questions regarding my overclock, here are my specs and results:

CPU: AMD Phenom II x4 965 C3

Cooler: Thermaltake Frio Silent 12

Motherboard: Asrock 970 Extreme4 ( 4+1 power phase :()

RAM: 2x4GB Kingston HyperX 1600 MHz CL9

PSU: Seasonic SS-620W Bronze

Graphics: Sapphire HD 7850 1 GB @ 1100 MHz / 1300 MHz stock voltage

HDD: 1TB Seagate Barracuda 7200.12

Case: Thermaltake Commander MS-I with 2x120mm fans ( front intake and back exhaust )





Here's what I did:

I raised the CPU NB voltage from 1.1v to 1.125v, then the CPU NB and HT Link from 2000 MHz to 2400 MHz

I also overclocked my 965 to 3.8 GHz @ 1.4v, it used to run at 3.4 GHz @ 1.3v. I ran Prime95 for 40 minutes using Small FFTs. Here are my temps:

Idle CPU temp: 32C
Idle Core temp: 30C

Load CPU temp: 58C
Load Core temp: 54C

I tested it for 10 minutes at 1.375v aswell and it seemed stable but I decided to bump up the voltage 2 notches just in case.

So my questions are, does the CPU NB need more voltage? Windows takes a bit longer to load since I did that. (Black screen for a few seconds before start screen appears)

And also, my CPU temps are higher than my Core temps, does that mean my motherboard is just shit or is it a defective sensor?
 
Solution
mlcaouette
Sorry for the late reply, I haven't been on in a while. If you are still around yes those temps are acceptable. It would be better if you ran prime for at least two hours though while making sure that the temps stay below the 55C mark.
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mlcaouette

mlcaouette

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You are borderline over temp for a Deneb chip. The phenom II's have their best performance with the CPU/NB at 2800-3000Mhz. Max safe voltage of CPU/NB is 1.3v **warning at 1.3v you will see a substantial increase in temp**

What I would recommend is taking the cpu back down to 3.5-3.6Ghz range lowing the vcore a bit to make room for a higher CPU/NB setting. This will net you better overall performance.

Until you get some better cooling this might be as good as it gets for you.
 
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monitobeko

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Question: Does overclocking the Northbridge increase only CPU temp or motherboard temp aswell? I'm a bit hesitant overclocking the CPU NB as this motherboard isn't a 990fx and it doesn't have the best power phase.
 
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mlcaouette

mlcaouette

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Overclocking the core or the CPU/NB will raise the temp of both the CPU and the motherboard VRM. The CPU/NB is separate from the Northbridge, the CPU/NB is on the CPU die and is effectively the CPU's memory controller. That is where the extra performance comes from, your CPU can communicate with the ram quicker.

There is no need to overclock the motherboards Northbridge chip as you won't get any noticeable performance gains. Also taking the HT above 2400Mhz doesn't do you a whole lot of good either.

The key thing here is to monitor all your temps. I would also suggest adding a fan to the VRM area of your motherboard so you can keep it cool and stable.
 
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monitobeko

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So I took your advice and dialed the CPU back to 3.7 GHz @ 1.35v and I increased the CPU-NB to 2800 MHz @ 1.275v (wild guesses ftw :D) while keeping HT Link at 2400 MHz. I ran prime95 for 20 minutes and these were my temps:


Load CPU temp: 57C
Load Core temp: 53C

I decided that they were still too high so I dialed the CPU back down to 3.6 GHz @ 1.325v. Ran prime95 for 20 minutes again, results:

Load CPU temp: 56C
Load Core temp: 51C

Then I decided I could go lower and tried 3.6 GHz @ 1.3125v (lol.), only ran this for 10 minutes for some reason so it might be +1C or so, results:

Load CPU temp: 54C
Load Core temp: 50C

So apparantly my CPU is able to run 3.6 GHz @1.30v o.o, ran this for a full 20 minutes again, results:

Load CPU temp: 54C
Load Core temp: 50C

Lowered cpu-nb voltage to 1.2625v, any lower and it's unstable, results:

Load CPU temp: 53C
Load Core temp: 49C

Is this acceptable?
 
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mlcaouette

mlcaouette

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Sorry for the late reply, I haven't been on in a while. If you are still around yes those temps are acceptable. It would be better if you ran prime for at least two hours though while making sure that the temps stay below the 55C mark.
 
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