F5F Stay Refreshed Power Users Overclocking speed changes in the overclocked 7700k even after disabling Speedstep

speed changes in the overclocked 7700k even after disabling Speedstep

speed changes in the overclocked 7700k even after disabling Speedstep

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IceBjornn
Member
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98
06-23-2017, 06:35 AM
#1
Hello there, fellow enthusiasts,
I'm still getting familiar with overclocking and faced a challenge I haven't managed to resolve yet. Recently, I upgraded my system with a custom waterloop and decided to attempt an overclock on my i7 7700K. I disassembled the CPU and swapped in liquid metal for the coolant. The waterloop performed exceptionally well (it looks impressive too), and my CPU temperatures stayed impressively low—around 30-35°C during idle, and 60-65°C even under heavy load after extended stress tests.

I tried to push the CPU from 4.2GHz to 5GHz, assuming cooling was sufficient, but encountered an issue: despite turning off Intel SpeedStep in BIOS, my 4-core clock speeds varied unpredictably between 5000MHz and 4300MHz even when under full load (as confirmed by HWMonitor).

Since I wasn't experiencing thermal throttling (temperatures never exceeded 65°C), I increased the voltage to 1.350V, but the result remained the same.

Could it be that my power supply (only 650W for the whole system and peripherals) is insufficient, or perhaps I overlooked a BIOS setting? Since I didn't initially plan an aggressive cooling or overclocking approach, my motherboard—ASRock Z270 Pro4—seems to have been a suboptimal choice (as noted in other discussions). Could it be the motherboard itself or an outdated BIOS that's causing the problem? Or did I simply miss a crucial setting?

Here are my complete specifications:
- System: Microsoft Windows 10 Home (x64), Build 16299.309
- CPU: Intel Core i7-7700K
- Motherboard: ASRock Z270 Pro4
- BIOS Vendor: American Megatrends Inc.
- BIOS Version: P2.00
- BIOS Release Date: 04/12/2017
- BIOS Start Segment: F000 (if helpful)
- Memory: 2x 8GB DDR4 SDRAM in Dual Channel
- GPU: KFA2 GeForce® GTX 1080 EXOC (with alphacool Waterblock)
- Powersupply: EVGA Supernova 650W

Please let me know if I missed anything important. I can share photos of my BIOS settings if that would assist.

Thanks for taking the time to review!
Edit:
My BIOS settings in OC Tweaker
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I
IceBjornn
06-23-2017, 06:35 AM #1

Hello there, fellow enthusiasts,
I'm still getting familiar with overclocking and faced a challenge I haven't managed to resolve yet. Recently, I upgraded my system with a custom waterloop and decided to attempt an overclock on my i7 7700K. I disassembled the CPU and swapped in liquid metal for the coolant. The waterloop performed exceptionally well (it looks impressive too), and my CPU temperatures stayed impressively low—around 30-35°C during idle, and 60-65°C even under heavy load after extended stress tests.

I tried to push the CPU from 4.2GHz to 5GHz, assuming cooling was sufficient, but encountered an issue: despite turning off Intel SpeedStep in BIOS, my 4-core clock speeds varied unpredictably between 5000MHz and 4300MHz even when under full load (as confirmed by HWMonitor).

Since I wasn't experiencing thermal throttling (temperatures never exceeded 65°C), I increased the voltage to 1.350V, but the result remained the same.

Could it be that my power supply (only 650W for the whole system and peripherals) is insufficient, or perhaps I overlooked a BIOS setting? Since I didn't initially plan an aggressive cooling or overclocking approach, my motherboard—ASRock Z270 Pro4—seems to have been a suboptimal choice (as noted in other discussions). Could it be the motherboard itself or an outdated BIOS that's causing the problem? Or did I simply miss a crucial setting?

Here are my complete specifications:
- System: Microsoft Windows 10 Home (x64), Build 16299.309
- CPU: Intel Core i7-7700K
- Motherboard: ASRock Z270 Pro4
- BIOS Vendor: American Megatrends Inc.
- BIOS Version: P2.00
- BIOS Release Date: 04/12/2017
- BIOS Start Segment: F000 (if helpful)
- Memory: 2x 8GB DDR4 SDRAM in Dual Channel
- GPU: KFA2 GeForce® GTX 1080 EXOC (with alphacool Waterblock)
- Powersupply: EVGA Supernova 650W

Please let me know if I missed anything important. I can share photos of my BIOS settings if that would assist.

Thanks for taking the time to review!
Edit:
My BIOS settings in OC Tweaker

Reply
Reply
D
d3ef_feed
Junior Member
Find
33
06-23-2017, 02:25 PM
#2
Hello, with a Gigabyte motherboard I'm uncertain if these changes will help but I suggest turning off CPU Enhanced Halt (C1E), C3 State Support, C6/C7 State Support, and C8 State Support. All of these settings are currently disabled and my CPU clock speed remains stable.
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D
d3ef_feed
06-23-2017, 02:25 PM #2

Hello, with a Gigabyte motherboard I'm uncertain if these changes will help but I suggest turning off CPU Enhanced Halt (C1E), C3 State Support, C6/C7 State Support, and C8 State Support. All of these settings are currently disabled and my CPU clock speed remains stable.

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J
Johnnyboy356
Member
Find
63
06-23-2017, 06:11 PM
#3
Hello, I own a Gigabyte motherboard and I'm uncertain whether these adjustments will be useful. I plan to disable CPU Enhanced Halt (C1E), C3 State Support, C6/C7 State Support, and C8 State Support. All of these settings are currently off, and my CPU clock speed remains stable under both idle and full load conditions. Thanks for the advice. I'll check my BIOS for those options and update soon.
Reply
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J
Johnnyboy356
06-23-2017, 06:11 PM #3

Hello, I own a Gigabyte motherboard and I'm uncertain whether these adjustments will be useful. I plan to disable CPU Enhanced Halt (C1E), C3 State Support, C6/C7 State Support, and C8 State Support. All of these settings are currently off, and my CPU clock speed remains stable under both idle and full load conditions. Thanks for the advice. I'll check my BIOS for those options and update soon.

Reply
Reply