Can't push the 7700k past 4.5Ghz.
Can't push the 7700k past 4.5Ghz.
Hi!
I’m facing some challenges when trying to push my processor to the desired 4.8Ghz.
My current configuration operates between 42-48 ºC during idle or light use, and around 70s during intensive tests like Prime95, with room temperatures ranging from 26 to 28ºC. Everything remains stable.
Here’s my BIOS setup and hardware details:
BCLK: 100Mhz
CPU multiplier: 45
Uncore multiplier: 42
Vcore: 1.3V (manual)
VLLC: Auto
System Agent Voltage: Auto
VCCIO: Auto
RAM Freq: 3000Mhz (XMP enabled)
All power-saving features are active except EIST.
CPU: i7 7700k
CPU cooler: Cryorig H7 (Push-Pull)
MOBO: Gigabyte GA-Z270X-UD3
RAM: Corsair Vengeance LPX 3000Mhz (8GB x 2)
GPU: Gigabyte GTX 1070 G1 Gaming 8GB
PSU: Seasonic G550
Boot drive: Samsung 850 EVO 250 GB
Case: Inwin 303
I’ve reviewed overclocking guides before, but most advice is limited to Gigabyte mobos and not much for this model. The issue appears when I set the multiplier to 47 or 48 – the Vcore swings between 1.28V and 1.43V, causing temperatures to spike to 80-90°C during Cinebench runs.
I’ve adjusted BIOS settings like DVID, System Agent Voltage, VCCIO, and VLLC, but results are inconsistent. Disabling XMP didn’t help either.
Could you advise if I’ve reached a performance limit for this chip? Are there hardware issues or software bugs affecting stability?
I’m not expecting much from the cooler since it’s in the lower price range, though it has a 140W TDP rating.
I also prefer not to remove parts to avoid voiding warranty or damaging the CPU.
Disclaimer: I’m new to overclocking, so please give me your understanding.
Initially, 1.43V would be too high for the Cryorig H7 to manage; the temperature looks acceptable. You should adjust the voltage manually.
Additionally, the motherboard lacks a strong VRM heatsink and sufficient power phase capacity for overclocking, though 4.8Ghz is feasible. It provides more advanced features such as SLI and a second M2 drive slot instead of focusing solely on overclocking. This type of overclocking chip is typically associated with the Gaming brand.
The current version of prime 95 is above 26.6 and uses avx instructions. The CPU will request more vcore when avx is detected, without regard to BIOS settings. If you wish to maintain a version higher than 26.6, set CpuSupportsAVX=0 in local.txt to enable AVX. Local.text is located in the Prime95 directory. A better cooler would be beneficial.
Initially, 1.43V would be too high for the Cryorig H7 to manage; the temperature looks acceptable. You should adjust the voltage manually.
Additionally, the motherboard lacks a strong VRM heatsink and sufficient power phase capacity for overclocking, though 4.8Ghz is feasible. It provides more advanced features such as SLI and a second M2 drive slot instead of focusing solely on overclocking. This type of overclocking chip is typically associated with the Gaming brand.