Core i7 4770K OC Voltage?
Core i7 4770K OC Voltage?
I've tested real bench. It stops working after some time. I ended up crashing unexpectedly while the PC was idle and I don't recall the exact error. The CPU isn't stable at any voltage with a clock speed above 4.0GHz. I want something at 4.4GHz or higher, but that requires a different processor. I've tried overclocking many times. Previously, I had a 4.3GHz overclock that kept crashing all the time. Now it's very stable and doesn't get too hot. It runs my games perfectly. My overclocker wants more, but I'm happy with my current setup. I'm a PC hardware enthusiast, but I'm fine with what I have since it meets my requirements. If you have any suggestions, I'd try them. I'd like to see speeds above 4.0GHz, though it's more of a desire than a necessity. If I can get more performance, I'll definitely take it.
Haswell is considered "Bad overclockers" since 99.9% of those who overclock won't handle an extra 200MHz without issues. These chips can only reach up to 5GHz with special conditions like liquid nitrogen and a 1.5V boost.
My magic boundary is set at 4.4. I can handle performance up to 4.4 with voltages between 1.230 and 1.250V, but anything higher would require a massive jump—about 0.100 volts or more. Given that my chip already operates in the high 80s under these conditions, I’m not considering adding another 0.100 or 0.200 even for 100-200mhz. For continuous use above 1.350V, I wouldn’t suggest it. De-lidding this chip would also be risky; even without it, I’d need at least 1.4 to reach 200mhz. A 5ghz frequency is an outlier, but if your chip supports 4.8-5.0, that’s a plus. In general, I’d keep expectations realistic—4.4 to 4.7 seems more sensible.
TechInAZ shared their experience with overclocking. They mentioned their 4790K reached 4.5ghz and could go up to 4.7ghz at 1.35v. They acknowledge that overclocking isn't guaranteed but are still eager to test its limits. They note that even the stock speed of their CPU is faster than theirs, and they're aiming for 4.6GHz or higher. They express disappointment with their 4770K, which requires 1.29v at 4.0GHz and doesn't stabilize above that voltage. They plan to post their results once they have the new CPU.
It seems you're struggling to reach 4.1ghz with 1.35v, but you're passing a one-hour stress test.
No capacity to exceed [email protected] is quite surprising. I think "poor overclocker" doesn't capture it well. (And I haven't experienced "really good" chips before myself). I would first check the board and BIOS settings, as well as the power supply unit. Apparently they should run 4.0 at stock, with many even going up to 4.2 on stock.
I suggest a range of 4.0-4.2, using a CPU input voltage of 1.800 (or whatever your board specifies) and a manual Vcore of 1.250 as a starting point. Do you have your LLC (load line calibration) configured correctly? This is crucial, especially depending on the board—Atmel/Asus usually have something like 7-8 with only slight droop under load. It's odd you'd need to adjust just for 4.0.
How would you verify stability?
Edit: From all stability tests, OCCT seems most sensitive...but I don’t really think it’s worth the effort. I can also pass hours of Realbench, X264 stability test, and even Prime95 (26.6 with a custom long FFT for an hour)...but a BSOD in just 30 seconds on OCCT large is concerning. (Unless I push even more voltage, which isn’t desirable, my chip is already hovering in the high 80s at 1.250.)
Haswell isn't bad for overclockers when you're using a decent Z87 or Z97 board, especially if it's not one of those low-end ones. I'm running a 4790K on Z87 and I'm getting 4.7 with 1.29v and x47. I'd like to try more, but I'm a bit lazy. Before that, I had a 4690k and got 4.6 with 1.3v. You're sure you haven't forgotten an "auto" voltage setting somewhere?