By turning off hyper threading in bios does it effect performance in any way ?

[Abominable]

I had to turn mine off just to play an old game from 2010

[Illusion of Progress]

引用自 Introverted Gamer：

The Sims 3, Going beyond 3 Cores in that game gives worse performance.

The only problem I have with that game is Windows 10 (I think, as it didn't happen under Windows 7 and it happens across a number of video drivers). The game itself works fine but forced anti-aliasing fails to apply in full screen mode, yet works fine in window for some reason. The in-game anti-aliasing ("edge smoothing") works fine so I use that now instead, but it doesn't apply everywhere (not in create a sim and not to the action pop-ups).

[Introverted Gamer]

引用自 Illusion of Progress：

引用自 Introverted Gamer：

The Sims 3, Going beyond 3 Cores in that game gives worse performance.

The only problem I have with that game is Windows 10 (I think, as it didn't happen under Windows 7 and it happens across a number of video drivers). The game itself works fine but forced anti-aliasing fails to apply in full screen mode, yet works fine in window for some reason. The in-game anti-aliasing ("edge smoothing") works fine so I use that now instead, but it doesn't apply everywhere (not in create a sim and not to the action pop-ups).

I had that Edge Smoothing issue with RX 580 The Action Head Pop-ups doesn't get any Anti Aliasing, also the Anti Aliasing Override/Enhance Application Settings through driver is broken, that causes trees and bushes to be rendered incorrectly. When I switched to 1660 Super all of those problems were completely gone. Must be an AMD thing. One odd thing is that with Edge Smoothing on Max, my RX 580 Screamed for Mercy, but with the GTX 1660 Super it was still Cool and Quiet like nothing happened.

[Marcus]

引用自 PinStripe：

I had to turn mine off just to play an old game from 2010

i think it is ok to turn off hyperthreading for your game as long as the game runs at desired framerates...does it run fast enough and what is the games' name?
my2ct

[Overseer]

引用自 PinStripe：

引用自 smallcat：

i am hearing for the first time that hyperthreading might prevent an application/game from properly running . What is that game ?

Witcher 2

The Witcher 2? What makes you think that game cannot run HT?

I know a game that cannot run more than 6 cores: Prototype. It will simply crash on more than 6.
But The Witcher 2 runs perfectly fine on my system.

[Illusion of Progress]

引用自 Introverted Gamer：

I had that Edge Smoothing issue with RX 580 The Action Head Pop-ups doesn't get any Anti Aliasing, also the Anti Aliasing Override/Enhance Application Settings through driver is broken, that causes trees and bushes to be rendered incorrectly. When I switched to 1660 Super all of those problems were completely gone. Must be an AMD thing. One odd thing is that with Edge Smoothing on Max, my RX 580 Screamed for Mercy, but with the GTX 1660 Super it was still Cool and Quiet like nothing happened.

Yeah, the anti-aliasing offered by the game (edge smoothing) never worked on the pop-up dialogue heads nor in create a sim mode. You had to force it for that, which I used to do. Then in Windows 10 it stopped working in full screen, but works in window mode.

I'm using a GTX 1060, not AMD.

Are you in fullscreen? And what drivers you using?

[Introverted Gamer]

Full Screen Anti-Aliasing works fine for me, but then i'm on Windows 11, Running an older driver 516.94, haven't updated yet.

[Illusion of Progress]

Yes, 516.94 here as well.

Hm, maybe it was Windows 10 (haven't tried it on 11 yet) or something else with my configuration somewhere.

[Viking2121]

HT can hurt performance on some games, but also disabling it can hurt performance in other games, its double edge sword. If you think HT is hurting performance in a game, and its usually them older games, You can use Process Lasso and stop a game or program from using the HT threads, though I do not know if this will have the same effect as disabling HT in bios.

On the other hand, why buy a CPU with HT if all you are going to do is disable it, I remember all them early i7 users doing this and turning their CPU's into pretty much i5's with slight more cache, and the performance impact HT could have was hardly measurable anyway.

[C7LYH]

.

[r.linder]

引用自 Viking2121：

HT can hurt performance on some games, but also disabling it can hurt performance in other games, its double edge sword. If you think HT is hurting performance in a game, and its usually them older games, You can use Process Lasso and stop a game or program from using the HT threads, though I do not know if this will have the same effect as disabling HT in bios.

On the other hand, why buy a CPU with HT if all you are going to do is disable it, I remember all them early i7 users doing this and turning their CPU's into pretty much i5's with slight more cache, and the performance impact HT could have was hardly measurable anyway.

Literally this. You don't need to disable HT/SMT to solve problems in games that run poorly with it, when most games and programs benefit from it.

[A&A]

引用自 尺．し工几句ヨ尺：

引用自 Viking2121：

HT can hurt performance on some games, but also disabling it can hurt performance in other games, its double edge sword. If you think HT is hurting performance in a game, and its usually them older games, You can use Process Lasso and stop a game or program from using the HT threads, though I do not know if this will have the same effect as disabling HT in bios.

On the other hand, why buy a CPU with HT if all you are going to do is disable it, I remember all them early i7 users doing this and turning their CPU's into pretty much i5's with slight more cache, and the performance impact HT could have was hardly measurable anyway.

Literally this. You don't need to disable HT/SMT to solve problems in games that run poorly with it, when most games and programs benefit from it.

If he has something like Ryzen 9 or i9 with E cores, where is the problem to turn HT off if he is not using all of the available threads? Otherwise for Intel from Pentium to I5 and for AMD from Ryzen 3 to 7, I see no reason for this to be applied.

[r.linder]

引用自 A&A ✠：

引用自 尺．し工几句ヨ尺：

Literally this. You don't need to disable HT/SMT to solve problems in games that run poorly with it, when most games and programs benefit from it.

If he has something like Ryzen 9 or i9 with E cores, where is the problem to turn HT off if he is not using all of the available threads? Otherwise for Intel from Pentium to I5 and for AMD from Ryzen 3 to 7, I see no reason for this to be applied.

It's even more stupid because you're paying for a CPU with more cores and by extension threads, you cut multi-core performance easily in half when you do that for basically no benefit since MOST games benefit from it.
If they want to stupidly leave half their threads off the table because of a single game instead of use something like Process Lasso or a similar program that has the same core affinity feature, that's their choice.

[A&A]

How is it dumb when the difference in multi core is 20% and if you hardly use the max of 12 or 16 cores and threads then how will this help? Tell me which game requires so many threads and do you know the difference with and without HT on more the new games with such processors ± 2%? The lasso process can help, but not much.

[Komarimaru]

Should be noted, that yes The Witcher 2 bugs out if too many threads, but you can use software to assign cores to the buggy launcher instead of disabling HT/SMT.

[Rod]

Im of the opinion that for AMD you keep SMT on but for Intel i9 HT could work well off. Think about that for a minute. The latest 2023 games might work better by default but older games are surely gonna work better with HT off.


They cant see the fake cores, Thus using more power and more heat no? Same with loads of E cores really Microsoft and Intel should have it where when you load a game the OS like Game Mode goes idle and runs on a single E core and gives the game its max boost on the minimal amount of cores the game needs.


32 threads is not for gaming 2,4,8,16 are the numbers were using from the old duals to the modern PS5 using 16 threads. So if i had an i9 i would likely run it with HT off, 16 cores boosted as high as they can go and all but a single E core disabled in bios. This would likely be the ideal setup for pure gaming on an i9 based on PS5 titles.