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2600k ht off no stutter.... smoother gameplay

post #1 of 19
Thread Starter 
i'm at work now and cannot post pics of my findings but would like to share my experience.

i have been overclocking sandy bridge for almost 4 weeks now (release day) i'm aways looking to push it more with better voltage etc. My machine is mainly for gaming. This morning i was reading about HT-ON might cause stutter with some games.

I ran metro2033 benchmark same setting at 5.0ghz HTON/OFF
82.1FPS HT ON @ 5GHZ
84.4FPS HT OFF @ 5GHZ

Now, i'm not here to argue which give better FPS but i notice (and aways had) that metro2033 benchmark had microstutter almost unnoticeable but around half way after the train, where the spot light is beaming at the screen i used to get big stutter problem. It is around 4-5 (noticeable microstutters during those seconds) my fps would go down to their 30's aswell. With HTOFF that same part did not have no stutter what so ever and no microstutter during the benchmark.
The stutter problem happens with Single and SLi just to dispute the idea of a SLI problem causing it.

i have not tried any other games because this was a rush run this morning before work.

It seems ht-off has smoother gameplay.

Side note: i can reach 5.2ghz HT-OFF with the same voltage i need for 5ghz HT-ON and still have -8c better temp.
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post #2 of 19
I am not quite sure how that is possible, unless:

I do know that without HT on you need less voltage for a stable overclock, so I think it would go to show that your OC is either unstable, or your Uncore/NB whatever it is now, is not correctly stable.

Therefore, turning HT off stabilizes your OC.
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post #3 of 19
What voltage are you running it at for 5.0Ghz?
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post #4 of 19
check this out http://www.overclock.net/10808893-post3.html

bumped that thread on accident trying to post in this one lol oops
post #5 of 19
Thread Starter 
Quote:
Originally Posted by RagingCain View Post
I am not quite sure how that is possible, unless:

I do know that without HT on you need less voltage for a stable overclock, so I think it would go to show that your OC is either unstable, or your Uncore/NB whatever it is now, is not correctly stable.

Therefore, turning HT off stabilizes your OC.
This is really no proof of stability because is only 1 hour pime blend stable. ( i can do 10+) but don't have proof for this.

With prime 95 blend stable 1 hour i would assume that running metro 2033 which each benchmark are only 1 minute long each (3 loop) would not cause any instability if i can do prime for 10 hours.

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post #6 of 19
HyperThreading occurs too fast to cause any noticable stuttering....
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post #7 of 19
FSX is this way - and since it's the only game I play, 5.0GHz HT Off it is
    
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post #8 of 19
Quote:
Originally Posted by eduardmc View Post
This is really no proof of stability because is only 1 hour pime blend stable. ( i can do 10+) but don't have proof for this.

With prime 95 blend stable 1 hour i would assume that running metro 2033 which each benchmark are only 1 minute long each (3 loop) would not cause any instability if i can do prime for 10 hours.

No, no no, you took me wrong, haha. I wasn't questioning you, I believe you did your stuff.

What you can try doing is click Blend (when ya get home) then switch to Custom, then change the memory to 200mb less than you max free memory. Run that for at least 8~10 hours.

But first, it could be GPU Clock/GPU Memory OC instability.

OCCT has a great test for GPU Memory where it runs "passes." 10 Passes = 2 minutes. I would run 100 passes for about 20 minutes, and you can run the OCCT Gpu clock test for about 30 minutes to search for artifacts.

When I was benching on HWBot, I found high GPU memory actually hindered performance quite a bit. The real trick is a to find stability but also good scores as a high clock could be causing issues too.

Also as a personal preference, when I am really finishing my OC (for stability) I like to run 30 passes on Linx or IBT. For some reason, 9/10 I get an error either right off the bat or towards the end, yet I have gotten a good 8 hour Prime stability.

To me thats like saying I would have had an hour around the 10-24 hour mark in Blend.

Quote:
Originally Posted by DuckieHo View Post
HyperThreading occurs too fast to cause any noticable stuttering....
Yeah, I would believe it could not help your game performance, but I don't really see how it could cause microstutter or hinder performance.

This sounds either like RAM, or GPU OC/GPU Mem OC.

I also have to tell you that your results are very close to being margin of error.
Edited by RagingCain - 2/2/11 at 6:59am
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Snowdevil
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post #9 of 19
Thread Starter 
Quote:
Originally Posted by RagingCain View Post
No, no no, you took me wrong, haha. I wasn't questioning you, I believe you did your stuff.

What you can try doing is click Blend (when ya get home) then switch to Custom, then change the memory to 200mb less than you max free memory. Run that for at least 8~10 hours.

But first, it could be GPU Clock/GPU Memory OC instability.

OCCT has a great test for GPU Memory where it runs "passes." 10 Passes = 2 minutes. I would run 100 passes for about 20 minutes, and you can run the OCCT Gpu clock test for about 30 minutes to search for artifacts.

When I was benching on HWBot, I found high GPU memory actually hindered performance quite a bit. The real trick is a to find stability but also good scores as a high clock could be causing issues too.

Also as a personal preference, when I am really finishing my OC (for stability) I like to run 30 passes on Linx or IBT. For some reason, 9/10 I get an error either right off the bat or towards the end, yet I have gotten a good 8 hour Prime stability.

To me thats like saying I would have had an hour around the 10-24 hour mark in Blend.



Yeah, I would believe it could not help your game performance, but I don't really see how it could cause microstutter or hinder performance.

This sounds either like RAM, or GPU OC/GPU Mem OC.

I also have to tell you that your results are very close to being margin of error.
what i don't understanding without changing any settings in my videocard. Running my videocard on default single and SLI, running my memory on default. I still get stutter, even when i ran my stock 3.4ghz 2600k the stutter was there and the only things that have gotten rid of the stutter is HT OFF. Again, i only tested metro 2033 with ht-off because of the short time. More testing will be done tonigh.

in 5ghz club is well known that sandy bridge 2600k can reach much lower temp and voltage while disabling HT.
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My System
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post #10 of 19
Quote:
Originally Posted by eduardmc View Post
what i don't understanding without changing any settings in my videocard. Running my videocard on default single and SLI, running my memory on default. I still get stutter, even when i ran my stock 3.4ghz 2600k the stutter was there and the only things that have gotten rid of the stutter is HT OFF. Again, i only tested metro 2033 with ht-off because of the short time. More testing will be done tonigh.

in 5ghz club is well known that sandy bridge 2600k can reach much lower temp and voltage while disabling HT.
Yes, but it defeats the purpose of having Hyperthread in the first place if all you're going for is the gigahertz. I found that with HT On at 4.7Ghz it was the sweet spot for performance in everything. Once I hit 4.8Ghz I actually lost performance in games and at 4.9Ghz-5.0Ghz I started having the microstutter in games you're talking about. Specifically Bad Company 2. So my guess is that it's either:
1. Unstable overclock
2. Not enough voltage
3. You hit the limit of the chip's efficiency

Once you get past a certain point you will actually start losing performance no matter if you believe if you're stable or not at that frequency. At least this is my experience in overclocking.
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