Hey Haswell and Devil's Canyon owners! I've used this thread a lot but I don't think I ever posted in it. I felt like this was something I needed to write though, even if the Z87/Z97 platform is getting fairly old now.
I ran my [email protected]
GHz, 1.3v ever since I first overclocked it. I've used everything from a dedicated 240mm H220x AIO to a noctua NH-U12S. All of them only ever managed to hit 4.7, 4.8 was a wall. I delidded when I went to an NCASE M1 to keep temps low enough to keep running 4.7, the cooling wasn't good enough for me to try going higher. Maybe if it had been, I'd have seen the previously insurmountable 4.8GHz was now somehow very achievable. Who knows.EDIT
I have since found the reason for the increase in overclocking potential to be from an updated microcode
, not from improved cooling. EDIT
Fast forward to today where I've just finished putting together a custom loop with 960mm² of surface area, and I've just managed to get 5GHz stable. Granted 1.47v is a Lot, but it works, and temperatures are peaking at 80C so the only real concern is high amperage. I also managed to get 4.9GHz stable at 1.36v, and 4.8 stable where 4.7 had been stable originally at 1.3v.
Proof of 5GHz stability:
Also here's 60 hours of folding at 4.9GHz:
Warning: Spoiler! (Click to show)
I'm not posting this to get it validated on darkwizzie's sheet, I know he's not updating this one any more. I'm showing it to let people know that custom loops can really make a difference with these chips, especially when coupled with a delid. If someone had told me my CPU was capable of 5GHz a month ago with better cooling, I wouldn't have believed them.
Considering the platform's age, I'm gonna run this thing at high volts to keep up with the latest CPUs. And if it degrades, well... there's always upgrading! TL;DR:
a delid and a custom watercooling loop allowed me to get 5GHz stable on my 4790k where before I could only get 4.7. Maybe it could for you, too.EDIT
Not from those improvements, but from updated microcode