OK, I want to post a final update for anyone who is interested. I apologise if this is a bit ranty but I feel like I’m getting some therapy from posting this. It’s mostly me venting some frustration, so feel free to not read if that doesn’t appeal to you. Anyway, here goes:
The performance of the system is undeniably awesome compared to my old 2500k. I invested in Cyberpunk 2077 and even with all settings maxed at 1080p there’s no perceptible jitter or lag and framerates are a solid 55 - 75 fps. Work tasks are also more productive as I literally don’t have to wait for anything to load - by the time I finish double-clicking on a word or excel file it has opened up. I still subconsciously expect a little pause and makes me smile every time it catches me off guard.
However it hasn’t all been plain sailing. Activating Windows has been a nightmare. I need Windows Pro for work and about 2 years ago purchased a retail digital license for Win 10 Pro. In theory I should have been able to transfer it to the new PC but no matter how many times I followed the instructions on the Microsoft support website it refused to work. I have submitted 7 (or 8?) support tickets to Microsoft over the past few weeks but they only actually contacted me back twice. On the first occasion the support guy rolled my Windows install back to Home because apparently “This digital licence is for UPGRADE to Pro so it needs to attach to a Home install” even though the support website specifically states the opposite. He hung up on me while Windows was reinstalling with a promise to call me back which he never did. Nor did anyone else.
The second time someone actually called me back they transferred me to “2nd tier technical support.” Unfortunately, they are apparently located in the US and it was about 2am their time so my call was promptly dropped after a short message telling me to call back in office hours. A further 5 unanswered support tickets later I’m ashamed to say that they wore me down and I bought another licence. Part of me wanted to keep trying, to be belligerent in the face of unnecessary, probably intentional, bloody awful customer service, but after 2 weeks of not being able to remote in to work it was starting to impact on my earnings.
I have also struggled with a lot of instability. The first problem was my backup / data drive dropping out of windows randomly. It would be fine one minute then inaccessible the next. In the end I sorted this out by swapping it to another nvme slot on the motherboard. I’m still not sure if the problem was a dodgy contact / install or dodgy slot but it now sits in the third slot on the motherboard, which is directly underneath the video card. So far it hasn’t seemed to get hot when the system is under load but I’m keeping an eye on it.
The second problem was with random crashes. Blue screens of death would occur at almost any time whether I’m doing something or even just clicking on the start button. The system cycles the power so quickly that most of the time I couldn’t catch what the error was. And there was literally nothing in event viewer to tell me what had caused the crash. The only errors in event viewer were the post startup entries stating that the previous shut down was not expected and the backup service couldn’t save to the backup drive because the system had shut down. I also had a lot of crashes to desktop when trying to use the GPU - even really old games that barely tax it will crash to the desktop randomly (even openTTD!) Annoyingly, it didn’t seem to correlate with GPU or CPU load. I could run a bunch of Time Spy / CP2077 benchmarks with no problem only to have the system crash when I tried to open a word document.
I eventually tracked this down to a problem with the RAM - windows memory diagnostic didn’t find anything wrong but when I ran a proper suite of tests using Memtest86 a possible vulnerability showed up. I backed off the frequency of the RAM a bit, from 5600MHz to 5333MHz, and the tests all passed and I’ve had no crashes since. My fingers and toes are firmly crossed that this is the last issue because if I have to waste any more time diagnosing problems with this system my wife is likely to just throw it out the window (literally) and consign me to my laptop forevermore.
The last thing I would comment on is the thermal performance. The 12700k is an absolute beast of a CPU! If I run PowerMax for more than a minute or so it will hit 200 watts and 5.2GHz on half of the p-cores. The Black Rock Pro cooler can in theory handle 250 watts, but in practice it can only just about cope with 200. Under full load using PowerMax the hottest core will hit 90 degrees C which is uncomfortably close to thermal throttling territory for me. I haven’t directly compared it with my old Noctua D15 but I have a feeling that the Noctua would have been able to handle the heat load a little better. On the other hand, it wasn’t nearly as pretty to look at
. I may also try installing a third party CPU mounting bracket to see of that will help, but as the difference between the hottest and coolest p-cores is pretty small it may not make that much of a difference.
Anyway, that’s all from me. I won’t be posting to this thread any more unless someone has a specific question. I will say that the current generation of tech seems a lot more fragile / fussy than I’m used to. The last one I built was a 2500k with a GTX 770 (which was quite a few years ago now). I’ve never had to diagnose random instability right after a build before. When I was pushing the overclocks, yes, but not out of the box using factory settings. I’m particularly annoyed with Corsair who seem to have sold me a pair of 5600MHz dimms that can only handle 5333MHz. Oh well, live and learn 