i5-4690K Max Overclock paired with my CPU cooler
i5-4690K Max Overclock paired with my CPU cooler
I'm curious about the best possible overclock for the I5-4690K given your current CPU cooler. Could you also share the expected TDP after the overclock? Thanks!
Micahharne,
Your inquiry applies only to Z87 or Z97 motherboards. Overclocking remains uncertain because it depends on numerous major and minor factors that influence results.
Increasing overclocking is constrained by two main aspects: voltage and temperature. Since no two processors are the same, each has distinct voltage tolerance, thermal response, and overclocking capability—often called the "silicon lottery." As the core speed rises, the core voltage (Vcore) must also rise to ensure stability. This leads to higher power consumption (Watts), which in turn raises core temperatures.
Your inquiry applies only to systems equipped with Z87 or Z97 motherboards. The process of increasing clock speeds isn't as straightforward as it seems, because it depends on numerous significant and minor factors that influence the final result.
Overclocking is constrained by two main aspects: voltage and temperature. Since no two processors are exactly alike—each has its own tolerance for voltage, thermal response, and overclocking capacity—the situation is often likened to a "silicon lottery." As the core speed rises, the required core voltage (Vcore) must also rise to ensure stability. This leads to higher power usage, which in turn raises core temperatures.
For processors from the 3rd and 4th generation, built on a 22 nanometer architecture, the ideal maximum Vcore is 1.300 volts. The i5 4690K Devil's Canyon represents an upgrade from the 4670K Haswell line. While its base clock reached 3.5 GHz, some models hit 4.7 to 4.8GHz, and a few even surpassed 4.9 or 5.0GHz with advanced cooling solutions.
The 120mm fan class 4 pipe downdraft cooler from Be Quiet! BK002 Shadow Rock is notably less efficient than popular budget options like the Cooler Master Hyper 212 EVO. This suggests your setup may have limited airflow, fans, or cooling capacity, which could hinder overclocking efforts.
The 4690K consumes around 88 watts and struggles to maintain stability above 1.25 Vcore, potentially reaching up to 120 watts during overclocking. In contrast, a 130-watt cooler has minimal thermal headroom and can only support mild overclocking. Setting the Vcore to "Auto" is discouraged because the BIOS will apply excess voltage than necessary, further boosting power draw and heat generation.
With superior cooling, you might approach the Vcore limit before reaching 85°C, while lower-end cooling solutions will hit 85°C sooner. Regardless of the threshold reached first, it’s wise to halt overclocking once that point is reached.
The typical safe operating range for core temperatures is:
- Above 85°C: not recommended
- Below 80°C: ideal
Core temperatures fluctuate based on ambient conditions. Keep in mind that even small changes in speed can affect performance noticeably.
In summary, the gap between performance gains and thermal constraints is significant. While achieving stable overclocks is possible, it remains a delicate balance. Without testing your specific hardware, it’s hard to guarantee success.
Additional information I wanted to include is that even when pushing my older configurations to high performance, maintaining normal temperatures isn’t always the best approach. I’ve managed to get my systems running at 90s under full load, but depending on what you’re doing—whether it’s intensive tasks or games—the optimal settings can shift. It really depends on how your workload uses the processor.
Regarding my previous setup, I believe the safe upper limit was around 86°C, and I lowered the overclock to the low 90s. During a game I enjoyed, temperatures stayed in the low 80s, suggesting a GPU bottleneck at that stage. I can’t pinpoint the exact issue now, but it seems I had some limitations there. I thought it would be useful to share this insight.
CompuTronix :
micahharne
,
Your inquiry applies only to Z87 or Z97 motherboards. The process of overclocking isn't as straightforward as it seems, because it depends on numerous major and minor factors that influence the result.
Overclocking is constrained by two main aspects: voltage and temperature. No two processors are alike; each has its own tolerance for voltage, thermal response, and overclocking capability, often described as the "silicon lottery." As the Core speed (in MHz) rises, the Core voltage (Vcore) must also rise to ensure stability. This leads to higher power consumption (Watts), which in turn raises core temperatures.
For 3rd and 4th generation processors built with a 22 nanometer microarchitecture, the maximum recommended Vcore is 1.300 volts. The i5 4690K Devil's Canyon represents an upgrade from the 4670K Haswell. It features a base clock of 3.5 GHz and was Intel's final 22 nanometer optimization. Some models hit speeds between 4.7 to 4.8GHz, while top performers could reach up to 4.9 or even 5.0GHz—especially with advanced cooling solutions.
As your Be Quiet! BK002 Shadow Rock LP cooler is a 120mm fan class 4 pipe downdraft cooler with a compact fin area, it offers significantly less thermal performance compared to Cooler Master's budget Hyper 212 EVO tower cooler. This choice also indicates you're likely working in a compact case with suboptimal airflow, which further limits overclocking potential.
The 88 Watt TDP 4690K becomes difficult to cool above 1.25 Vcore and can handle up to 120 Watts during overclocking. Your 130 Watt cooler has almost no thermal headroom and is only suited for mild overclocking. It's not advisable to set the Vcore to "Auto" because the BIOS will apply more voltage than necessary, increasing power usage and heat output.
With superior cooling, you might hit the Vcore limit before reaching 85°C. With basic cooling, you'll reach this point around 85°C. Regardless of which threshold you hit first, it's the right time to stop.
Here’s the typical core temperature range:
- Temperatures above 85°C are discouraged
- Temperatures below 80°C are preferred
- Core temps fluctuate with ambient conditions
Keep in mind the broader context: overclocking should be approached with caution. The gap between 4.5 GHz and 4.6 GHz is less than 2.3%, which doesn’t significantly affect overall performance. Pushing your processor beyond recommended core voltage and temperature isn't worth it just to gain a few more MHz.
If my assessment of your hardware is correct, if you can achieve a stable overclock of 4.4 to 4.5GHz without exceeding 85°C, I’d be happy with that result—especially given the constraints. But predicting how well your specific 4690K will perform under stress remains uncertain until you try it yourself.
Sorry, but regarding your "Max Overclock" question, a precise answer can't be guaranteed.