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Re: Input lag and desync problem due to RAM?
Posted: 06 Aug 2025, 15:20
by amorou
I always said ram has the most effect on this thing.
Slowing it down makes it better this is prolly well known , if your cpu power cable going near it even with 6 cm distance , its goes shit.
Cheaper ram = better , b-die or super high mhz capable sticks= worse
Single channel = better if you dont get fps drops.
Inserting them all the way = worse , slight pulling after install = better ( this is very subtle tho )
I was considering sandpapering ram slot pins on back of mobo to increase signal integrity , but you gotta shorten each one of them the same. Also mechanical stress might harm solder joints.
Re: Input lag and desync problem due to RAM?
Posted: 06 Aug 2025, 20:27
by naporitan
I currently have a pvs416g400c9k RAM kit (samsung bdie) and am learning all the theory of overclocking, fine tuning. I'll let you know what comes out of it if I can figure it out. So far I only have 1 set of RAM F4-3200C16D-16GTZRX that runs on xmp without desync in games, but I'm hoping that with tuning it's possible to get it perfect.
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 04:55
by Syykfk
ChristophSmaul1337 wrote: ↑05 Aug 2025, 22:11
If you suspect your RAM kit to be a problem, you may run a simple test to rule specific things out. As you probably know, RAM stability is dependant on temperature. What can happen is that you've overclocked your RAM one day, let it train itself while the temperature was pretty low, and since there's "Fast Boot" enabled it will skip through some training on boot up, essentially "locking in" the once trained properties. When you're playing a game and the inside of your PC heats up more, due to the GPU dumping heat for example, the once stable memory might become unstable with elevated temperatures. To eliminate this specific cause, you may run a simple test:
For now, try the above steps with the RAM set you describe as "having problems".
If I don't use xmp, does that mean I don't need to use your tutorial?
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 05:43
by ChristophSmaul1337
Syykfk wrote: ↑07 Aug 2025, 04:55
If I don't use xmp, does that mean I don't need to use your tutorial?
If you have problems, you should use that method to eliminate a RAM problem from your equation, doesn't matter if XMP was used or not. I'm stating it again and again, it's not meant to be a solution. The point of that procedure is to get the memory out of the question for your troubleshooting. You can always do it if you suspect your RAM to be a problem. Hope that helps.
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 07:49
by Dcyker
ChristophSmaul1337 wrote: ↑07 Aug 2025, 05:43
Syykfk wrote: ↑07 Aug 2025, 04:55
If I don't use xmp, does that mean I don't need to use your tutorial?
If you have problems, you should use that method to eliminate a RAM problem from your equation, doesn't matter if XMP was used or not. I'm stating it again and again, it's not meant to be a solution. The point of that procedure is to get the memory out of the question for your troubleshooting. You can always do it if you suspect your RAM to be a problem. Hope that helps.
I don‘t have the MCH Full Check Option on my x870e-e, can I do your method anyways with just using Fast Boot enabled/disabled?
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 10:02
by amorou
naporitan wrote: ↑06 Aug 2025, 20:27
I currently have a pvs416g400c9k RAM kit (samsung bdie) and am learning all the theory of overclocking, fine tuning. I'll let you know what comes out of it if I can figure it out. So far I only have 1 set of RAM F4-3200C16D-16GTZRX that runs on xmp without desync in games, but I'm hoping that with tuning it's possible to get it perfect.
Multiple people asked if desync continues without xmp on 3 rams , Im curious about it too
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 11:15
by ChristophSmaul1337
Dcyker wrote: ↑07 Aug 2025, 07:49
I don‘t have the MCH Full Check Option on my x870e-e, can I do your method anyways with just using Fast Boot enabled/disabled?
Sure. It will still work, it's just something I like to have on on ASUS boards, but it's not needed. Fast Boot should be there though, every somewhat recent board/BIOS should have that. Just make sure the memory is (re)trained under the worst-case scenario with high temperatures.
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 11:41
by Dcyker
ChristophSmaul1337 wrote: ↑07 Aug 2025, 11:15
Dcyker wrote: ↑07 Aug 2025, 07:49
I don‘t have the MCH Full Check Option on my x870e-e, can I do your method anyways with just using Fast Boot enabled/disabled?
Sure. It will still work, it's just something I like to have on on ASUS boards, but it's not needed. Fast Boot should be there though, every somewhat recent board/BIOS should have that. Just make sure the memory is (re)trained under the worst-case scenario with high temperatures.
I've done your Method and it's literally the same timings as before my ram didnt go past 45C, I am not using EXPO.
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 14:28
by ChristophSmaul1337
Dcyker wrote: ↑07 Aug 2025, 11:41
I've done your Method and it's literally the same timings as before my ram didnt go past 45C, I am not using EXPO.
Great! Now you know for sure that temperature related instablilty is not a concern and you can continue troubleshooting elsewhere. Objective achieved. Also the timing reader tool you use doesn't show every single timing and subtiming, obviously. There might still be subtimings that have been changed by BIOS when training. It doesn't hurt leaving it like this when moving forward with troubleshooting elsewhere.
Re: Input lag and desync problem due to RAM?
Posted: 07 Aug 2025, 19:24
by naporitan
amorou wrote: ↑07 Aug 2025, 10:02
naporitan wrote: ↑06 Aug 2025, 20:27
I currently have a pvs416g400c9k RAM kit (samsung bdie) and am learning all the theory of overclocking, fine tuning. I'll let you know what comes out of it if I can figure it out. So far I only have 1 set of RAM F4-3200C16D-16GTZRX that runs on xmp without desync in games, but I'm hoping that with tuning it's possible to get it perfect.
Multiple people asked if desync continues without xmp on 3 rams , Im curious about it too
Without xmp I don't get desync, but the input lag is higher and for that reason not playable.