Fixing High Latency Issues and Boosting Performance on Intel CPUs

I forgot to mention, I did also reset everything in the bios to default while still enforcing stock intel limits. Xmp was also disabled and the problem still persisted. Undervolting and OC can introduce issues like this but only IF its unstable. As I had mentioned I did validate stability so there's no issues there.

If core parking is an issue, you can also disable the c-state C6 in BIOS. If necessary also C3, but for most folks, the first tweak is already sufficient. When disabling C3+C6, the CPU can still save power via C1/C1E, which are very, very fast recover from. The core "unpark" software is essentially doing the same, but on the OS level. BIOS does it in hardware, which could theoretically work even better, because the feature doesn't even get advertised to the OS then. C3 is "L1/L2 cache flush, clocks off, voltage stays on", while C6 is "C3 + dumping all registers, PLL off, voltage off(!)". It's esentially shutting down the core almost fully and thus has a much higher transition latency upon wakeup.

I did a video on this with Tech Yes City also involved. Tech yes and I have spoken to each other behind the scenes. We believe that its an issue that essentially varies chip to chip. Almost like silicon lottery (same idea). EDIT: Hey thank you for including me in this! Yeah the original video was pretty crazy in the comments. I went ahead and counted every comment while the video was up, about users having the issue. It came to 35% of users saying they suffered the same issues across both windows 10 and 11, but you were right about the trolls. They really went for me man. Got a bit nutty. Glad to see your covering this.

Thank you for helping me and working with me.

This is great information I thought I was going crazy when I saw my mouse cursor moving funny. Thank you for making this video 😊

This is more than likely a Windows issue. Even with the Brian Video an Intel Engineer went into the Comment and left a lengthy message about the subject saying they are aware of the issue and it is related to Windows OS. Not surprising. I honestly probably would switch to Linux if I would take the time to learn it. Windows is just of those necessary evils that come with PCs unfortunately.

I will try this as well thanks. the biggest dpc fix for me before this was enabling MSI (message signal interupt) mode on all supported hardware in my PC. i think mainly the audio device not being on MSI. another thing that made every game run better was turn off hyperthread.

I used the app Tech yes city used to unpark cores with the lower settings under cpu powermanagement. BY GOD IT improved performance and got rid of hard stutters in Pubg. The stutters is 90% concurrent with visible core parking in Task manager. Oc ing the the ecores to 4.6Ghz and setting the preference to all cores instead of P er E helped balance the workload out. So in case of massive uptick in load, like shooting out of a car the games dont have those fps drops anymore. Gamefeel and hitreg was unaffected, so still usable even with the game running on ecores. Ring ran at 4.7Ghz. I'm now running just 8 ecores since the last 8 have a massive ram latency penalty but in some games like SC I would turn those on in bios too. That Core Parking has killed my gaming experience for 3 years, I'm so mad at Windows right now.

WOW, this fixed it all. 12900k, 3090ti and 64gig 5200 34cas ram would struggle to access a seperate downloads drive in file manager. VS2022 would stutter and lag loading. Unparking the cores it is now so quick i have to slow down clicking. Max power usage on this system under full load could get to 820 watt, idle/normal office workload was less the 5 watt and now with all the cores active it is less than 15 watt with exceptional response. I can live with an increase of 10 watt. thank you

I had the stuttering issues so bad I ended up ditching my 13700KF. I went through all sorts of things before the Tech Yes videos came out and eventually got so annoyed I just sold it and moved to a 7800X3D. The best way I found to detect it was to use a high refresh rate display (in my case a 240hz 1440p) and just move the mouse in a consistent circle in the middle of the monitor, just on the desktop with nothing else open I could clearly see and feel the stutters and you would see gaps open up around the "circle" of mouse pointers whenever it stuttered. Latencymon didn't detect anything abnormal but it drove me crazy. I tried Windows 10 and 11, TPM on and off, all sorts of things including shutting down the E-cores, etc.

The latency rabbit hole is deep but unparked cores does work well. To go further you need additional tools from microsoft. Interupt affinity policy tool + device manager allows you to find the hardware address + choose the core it interupts. This allows you to manually move the interupts from the first core to any core you want. This can be tricky because you can also make the interupts worse by manually configuring them wrong. Microsoft also has documentation on how to set up a device for real time performance. TBH not a lot of this effects gaming, it helps, but the rest of the computer experience is maxed out when nothing has latency.

I just disabled E cores and set P cores to a static frequency. Havent once had issues with stuttering or lagging with any 12-14th gen CPUs. Ive played with most every cpu in the lineup.

@DannyzReviews My question is does the InSpectre work with your 14900K? Did it help improve latency as I thought they baked the solution in the hardware. Please confirm coz if it did help I'd be happy to use it as I'm on a similiar architecture. Thank you 👍

great video like always Danny

I was able to explain to the developers what debug mode for thermal set modes it is supposed to do until numbers level out , your chip might run hot on purpose to set parts layers and endurance check on the inside of the system

Interesting video, seems people actually have an issue with the intel cpus i mean as far as i can tell by using my pc for over a year ive not had any latency issues that i personally can tell other than boot times being slower on 13th gen compared to 4th gen which is also interesting tho so i assume intel had to change quite a few things compared to 11th gen and below that might be causing latency issues?

I just got a 14900KF and a 4090 and am having issues in multiple games. Some game crashes at the same place, some other games wouldn't even start. Some games told me I didn't have available memory. I fixed that by changing the mode on my motherboard, which turned off a bunch of cores. Still crashes but the memory issue is gone. I've read multiple places that they advise me to downclock my CPU, which seems like a weird fix. I left AMD because I was tired of driver timeouts, driver crashes and other issues. Seems like it was a bad calculation since intel is the one with issues now.

cpu unpark was the fix for me. so weird cus i had the same problem as u with 14900k, random ridiculous spikes at times while i didnt notice any performance issues on any games or programs. But now latencymon shows positive numbers. Thanks for the help :)

for me the fix was unistalling intels arc drivers for the igpu.

I checked LatencyMon on my 13900KF and the latency values were pretty low. The most latency (about 650 us = 0.65 ms) had the stupid anti-malware executable from windows defender, but it could be fixed by turning off real-time antivirus protection. The "problem" was that I couldn't unpark P-cores no matter what. "Core parking index" was already at 100% by default, but the "CPU unpark" App shows 16 parked threads and 16 unparked (I have 32 threads enabled: 8 P-cores + hyper-threading and 16 E-cores). "Unpark all" button or changing system power plan are doing nothing. I also changed the registry key so that I have this parking option changeable in standard windows power plan settings, and it was also 100% by default. Maybe it's some power saving settings in BIOS