Matching the 4790k cache voltage with the core is essential.
Matching the 4790k cache voltage with the core is essential.
Hey everyone,
I own a 4790k and Maximus Hero Vii. I’m trying to push it for continuous overclocking. I’m basing my reference on Cinebench scores. With a 102.2 BCLK, 47x multiplier, and 1.35v, the system runs smoothly at around 4801mhz and maintains good temperatures.
The standard Cinebench score is 888. The current overclocked Cinebench is 966.
According to the AIDA64 stability test, peak temperatures stay under 88°C, only briefly reaching that level, and it’s running in the 60s for a bit—seems like a stable thermal profile. My goal is to find a Cinebench score closer to 950 with lower voltages, maybe even adaptive voltage. I’ve heard adaptive voltage can save power but I’m not sure how to set it up properly without sacrificing stability or performance. I’m currently using a 46x multiplier at 1.275v, which came pretty close to the 950 target.
My main challenge is the cache. It’s currently auto-adjusting, but when I check hwinfo, the cache voltage matches the CPU core voltage. I tried pushing the cache to 40x with a voltage of 1.215, hoping for lower temps, but I’m not sure what the effect would be. Any suggestions would be great!
I've experimented with adaptive, faced stability problems and often end up with a fixed voltage. On the other hand, it doesn't really matter to me. I have a machine focused on gaming (and printing, perhaps), but when it's running it's usually gaming mode. Adaptive can also cause voltages that go beyond safe limits, just like with LLC.
I think the cache voltage should adjust with core voltage if you're aiming for a 1:1 cache ratio; otherwise it should be okay. If you haven't adjusted the Vin yet, you might try increasing it slightly. It should be around 1.8 volts as a default, but when overclocking this much it should be about 2.0 or a bit higher.
It's been a while since I worked with Haswell, maybe wait for more opinions before deciding.
I've experimented with adaptive, but stability problems often arise, resulting in fixed voltages. On the other hand, it doesn't really concern me. I have a machine focused on gaming (and printing, perhaps), but when it runs it's usually gaming mode. Adaptive can also cause voltages to go beyond safe limits, just like with LLC.
I believe the cache voltage should adjust with core voltage if you aim for a direct 1:1 ratio; otherwise it should be acceptable. If you haven't adjusted the VIN yet, you might try increasing it slightly. It should be around 1.8 volts as a default, but when overclocking this much it should reach about 2.0 or a bit higher.
It's been a while since I worked with Haswell, maybe wait for more feedback before deciding.