I recently decided to embark on tweaking my slightly older system the last few days. It is an i7 7700k, MSI Z270 Mobo, MSI RTX 2080. Back when I first built this system (I was one of those who bought in to a 7700k build right before 8700k showed up, so that was annoying) but I stopped my overclock on the 7700k at 4.8ghz entirely because I couldnt get Prime 95 stability due to AVX instructions causing failures beyond 4.8ghz. I did not want to run an AVX offset because I always noted in my testing that the cpu would toggle to the avx offset constantly in games, often ping ponging between my real frequency and the avx offset. I eventually just said screw it, set it at 4.8, dialed in the voltage and left it alone. That was over 1 year ago, and at that time 4.8ghz and a 1080p monitor it did all I needed honestly. Now I am running 3440x1440 ultrawide, an RTX 2080 that I added several months ago, and a brand new kit of 32GB samsung B-die memory arriving in the mail today (Before its fully discontinued everywhere) so Ive decided to revisit overclocking my system to try and pull every drop of performance out of it. At 3440x1440 resolution, with graphics settings on the high side in most games, the gap between my 7700k and say, the 9700k at the same clock speeds is actually pretty tight. My pixel count is over that of 1440p, but less than full 4K res, but its enough pixel density that my RTX 2080 (2025 core / 8100 memory) tends to be the bottleneck in most games, and when games bottleneck on the gpu as most of yow know, the difference between a 7700k , an 8700k, or a 9700k are pretty small in benchmarks given they are all running at the same speed, etc. I say all that to say that I just cant see myself investing in a new mobo and cpu at this time, but I wanted to get this 7700k to 5GHz. So to the main point here - I feel like Ive actually got a great 7700k, The avx issue is just really annoying me and Ill go into why here in a second. I have this 7700k right now running at 5ghz, and it is rock stable everywhere. I can game on it for hours, and have done so. I can run Intel Xtreme Tuning utility stress for hours, heavenbench for hours, 3d mark stress for hours, the old, non AVX prime 95 for hours, and it passes everything. My voltage in bios is set to 1.285 adaptive, so it swings from that 1.285 up to around 1.315v depending on load, but that voltage at 5ghz on this chip from what ive seen is pretty impressive. My problem is that as soon as I run the new versions of prime, that hammer avx instructions, 2 or 3 of the cores fail within seconds. So far I have ignored it because I am so stable in everything else as I mentioned. I also really hate the avx offset because I feel that it triggers so often that it almost negates my overclock to 5ghz, and here in lies my AVX Offset dilemma. Some games, like AC Origins will run 100% of the time at the avx offset if it is set. This annoys me, because at my full 5ghz clock it runs completely stable. I also find it odd that prime 95 will fail, as it also forces my cpu to declock due to current throttling. I can bump the amperage throttle up to prevent the throttling but this obviously puts the cpu in dangerous temperature ranges of right around 100c so then I hit thermal throttling. Logically, I would expect the throttle that is occuring to prevent the prime 95 stress from failing because the throttle is pretty hard, from 5ghz to down to 4.2 - 4.4ghz, yet several workers still fail. If I declock my cpu to 4.8ghz though I can run the same test all day long without fail, so I suspect the failure must be occurring just before the declock is occuring. So I step back and look at the situation I got here. Part of me almost says I should just ignore prime 95. It puts the most insane load on the cpu - 95c temps, hitting current limit, all due to the massive string of avx instructions. No software I will ever run will hammer the cpu this hard, so I tell myself there is no reason to hurt my performance just to pass this one test - but it still bothers me. The little intel extreme burn in utility which also hammers avx instructions is also a hard hitting stress test for me, it also throttles the cpu and ramps up the temperatues, but it never fails a pass, likely because the cpu ends up running below 4.5ghz, just as it does with prime 95. In all the other stress tests and bencharks I have run at 5ghz I pass with no issues. Im just curious how others have dealt with this issue. Im sure others have run into this exact scenario. I feel like I might could even get this chip to 5.1ghz. If I could do that, I wouldnt mind setting an avx offset of 1 in that case to maximize stability, but I really hate an avx offset that puts me at 4.8ghz, simply because of how often it seems to trigger in random games - almost as if there is some bug with it.