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A little overclocking guide/log to i5 4670K

post #1 of 7
Thread Starter 
This is my little guide I made a while ago when overclocking! Hope you find this helpful!

Some logging I did when overclocking:

This CPU is a freaking rock. Haswell might be one of the most hardest platforms to overclock on. Hell, it's even harder than OC'ng back on 1366 i7 920. Went through tons of random BSODs, but managed to finally reach a stable point. All OCs went from stock clock and non-stock voltage (3.4GHz and 1.100V). I have a fan controller, and all fans (including radiator fan) were running at 1120 RPM. I have a total of 4 fans, including one 200mm intake fan at the top. No heat spreader fixes and thermal compound changes have been applied to the CPU.

This walkthrough (Guide, sorta) will go from stock 3,4GHz to 4,0GHz with a clean overclock. For those who are searching for a dirty overclock; sorry, I don't want to waste a whole week stresstesting.

Specs

CPU: Intel i5 4670K @ 3.4GHz, Batch #L311B221
RAM: 16GB Gskill 1600MHz @ 1.5V DRAM
Cooling: Antec Kuhler 620
Motherboard: Gigabyte GA-Z87-D3HP
GPU: Asus NVIDIA GeForce GTX 650Ti DirectCU II @ 928MHz and 5440MHz GDDR5
UPGRADED 17.9.2013, PSU: Nexus RX-1K 1kW
Case: CM Storm Stryker
OS: Fresh installation of Windows 7 Ultimate 64-bit Build 7600

Software

CPU-Z v1.65.1
IntelBurnTest (IBT) v2.54
RealTemp v3.70

OC Results

Attempt #1

OC to: 3.5GHz @ vcore 1.150V
Incrementation: 100MHz and vcore by 0.05V

OS boot: Booted
Idle temp: 38C

Running IBT @ High for 10 times
IBT Results:
- Temps: Min. 38C, Max. 64C on first core
- Linpack Output: Avg. processing time 51.3s with Avg. 51.5 GFlops
- Stable throughout the test

Overall Result: Stable

Attempt #2

OC to: 3.6GHz @ vcore 1.200V
Same incrementation as Attempt #1

OS Boot: Booted
Idle temp: 40C

Running IBT @ High for 10 times
IBT Results:
- Temps: Min. 38C, Max. 68C on first core
- Linpack output: Avg. processing time 50.1s with Avg. 52.2 GFlops
- Stable troughout the test

Overall Result: Stable

Attempt #3

OC to: 3.7GHz @ vcore 1.226V
Incrementation by 100 MHz and vcore by 0.026V

OS Boot: Booted
Idle temp: 40C

Running IBT @ High for 10 times
IBT Results:
- Temps: Min. 38C, Max. 72C on first core
- Linpack output: Avg. processing time 48.4s with Avg. 54.7 GFlops
- Stable troughout the test

Overall Result: Stable

Attempt #4

OC to: 3.8GHz @ vcore 1.242V (Somehow CPU-Z shows 1.240V)
Incrementation by 100 MHz and vcore by 0.016V

OS Boot: Booted
Idle temp: 41C

Running IBT @ High for 10 times
IBT Results:
- Temps: Min. 39C, Max. 74C on first core
- Linpack output: Avg. processing time 49.1s with Avg. 53.7 GFlops
- Stable troughout the test

Overall Result: Stable, but processing time got worse at first run. Reran the test; significantly better results. May be an OS bug.

Attempt #5

OC to: 3.9GHz @ vcore 1.264V
Incrementation by 100 MHz and vcore by 0.024V

OS Boot: Booted, long log-in time (15s)
Idle temp: 44C

Running IBT @ High for 10 times
IBT Results:
- Temps: Min. 39C, Max. 78C on first core
- Linpack output: Avg. processing time 47.1s with Avg. 56.2 GFlops
- Stable troughout the test

Overall Result: Stable

Attempt #6

OC to: 4.0GHz @ vcore 1.280V (CPU-Z shows 1.278V)
Incrementation by 100 MHz and vcore by 0.016V

OS Boot: Booted
Idle temp: 44C

Running IBT @ High for 10 times
IBT Results:
- Temps: Min. 42C, Max. 80C on first core
- Linpack output: Avg. processing time 45.7s with Avg. 58.1 GFlops
- Stable troughout the test

Overall Result: Stable

Let me know if I missed something or this guide should be more specific! I'm planning on lowering the voltage later to the point where CPU will be unstable and make it stable again.

EDIT: Managed to successfully undervolt to 1.080V. Ran 10 IBT tests. System is stable.
EDIT 2: Currently running @ 4.6GHz, 1,25V. Validation: http://valid.canardpc.com/07cixm
Edited by Clonetrone - 9/21/13 at 9:45am
post #2 of 7
Glad you're having fun overclocking thumb.gif

However, this shouldn't be called and is not a guide in any fasion. It's simply a result log. Not bashing by any means, jut others should be aware.

That's also a pretty high voltage for a low 4.0Ghz overclock. You can probably fine tune it a bit more.
post #3 of 7
Thread Starter 
Quote:
Originally Posted by adamlee05 View Post

Glad you're having fun overclocking thumb.gif

However, this shouldn't be called and is not a guide in any fasion. It's simply a result log. Not bashing by any means, jut others should be aware.

That's also a pretty high voltage for a low 4.0Ghz overclock. You can probably fine tune it a bit more.

Thanks for the feedback! I will start lowering the voltage today.
post #4 of 7
Quote:
Originally Posted by Clonetrone View Post

Thanks for the feedback! I will start lowering the voltage today.

So what did your temps look like at 4.0 @ 1.080V?

I just finished my build and noticed that according to the BIOS read-out it was idling at 40C (w/ 212 Evo) .. which seems a little high considering I hadn't even booted into Windows yet.
post #5 of 7
With that 1.28 VCore you could probably hit 4.4-4.6 core clock.
post #6 of 7
Thread Starter 
UPDATE: Sitting @ 4.6Ghz, 1.25V, Temps are around 30-40C idle, 60-80C at heavy load.

Tested games like Crysis 3 on medium graphics (because GPU is a bottleneck). Max temp: 74C
ArmA 2 ran a little bit better: Graphics maxed out, including anti-aliasing and tesselation. Max temp: 79C

CPU-Z Validation: http://valid.canardpc.com/07cixm

Happy Overclocking!

- Clonetrone
post #7 of 7
haha lol my i5 4670k on 4.0 ghz is stable at 1.045volt tongue.gif
i have the cooler master 412 the temps are after 1 hour prime95 55degrees my room is 27degrees (summer time)
mobo is msi z97 gaming 3
lucky?
grzz
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