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Does delidding help overclocking or only improves cooling?

post #1 of 7
Thread Starter 
I wonder if delidding is always a help to overclocking or if it's only a replacement of a better cooling system. In short, does is improve overclocking or overclocking improvement might be only an indirect result of not being able to use a better cooling system?
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post #2 of 7
by having a cooler CPU, it tends to be more stable during tests and you will have more overclock headroom which gives you the option to push the CPU harder than its current max (an example).

hope that makes sense to you and gives you an idea.
post #3 of 7
Quote:
Originally Posted by fateswarm View Post

I wonder if delidding is always a help to overclocking or if it's only a replacement of a better cooling system. In short, does is improve overclocking or overclocking improvement might be only an indirect result of not being able to use a better cooling system?

Hi wink.gif

It can, and generally does, allow for both. The primary goal is lower temperatures for decreased chip stress. The secondary bonus is that by lowering your temperatures at X voltage, you can then increase to a higher voltage which usually results in a higher clock.

For reference, I peaked mid 90's at 4.8Ghz and 1.247vcore, on an H220. After delidding, I've been at 5.1Ghz and 1.41Vcore peaking 86C. It still wasnt quite stable, and although I most likely could have upped the voltage for a stable 5.1, or a definite stabilized 5.0Ghz, I never intended to push more than ~1.35 Vcore no matter the temps/speed. Others however, would definitely be willing to so long as temperatures were acceptable under stability testing.

Even if my chip hadn't performed as well as it does, I still would have wanted the highest stable clock at my preferred voltage. Regardless of the clock I might have achieved on a different chip, the prospect of decreasing thermal stress and helping the longevity of it would have warranted a delid, low OC or not.

With that being said, on my sample, an achievable 200-300mhz increase from delidding is quite significant. Before increasing the clock past 4.8GHz, I noticed a ~25C drop. I definitely recommend it, so long as you use the vice method.

Vice I used, smooth clamping surface (ideal):
http://www.homedepot.com/p/Irwin-3-in-Clamp-On-Vise-226303ZR/100537101#.UcwdrPnryz8

Alternative,, diamond-grip (can cause IHS scars):
http://www.homedepot.com/p/Irwin-4-in-Drill-Press-Vise-226340/100578950#.Ucwdx_nryz8

What chip are looking into?
Edited by adamlee05 - 6/27/13 at 4:18am
post #4 of 7
...depending on how much temperature is affecting your overclockability then yes!

That is for instance; if you can get to say 4.8 GHz, but your temps get too high before you can properly test whether your overclock is stable, then you need to improve your cooling. Delidding can help with dramatically lowering your temperatures.

That said, if you are planning on delidding your chip, you should be in a position whereby you can afford to replace your CPU if something goes wrong! Delidding should not be used in stead of a decent cooling system and should be used in conjunction with the best cooling system you can provide. As you stand a real risk of breaking your chip in the delidding process it should be the last thing you do if you really 'need' that extra temperature room for your overclock....don't be delidding to be using it with the stock intel cooler!

I delidded my 3770k and have seen a drop in core temps of ~30C and what is interesting, is that the previous hottest core is now no longer the hottest core! Delidding allowed me to push my overclock a further 0.2 GHz with a net temp drop of ~10C.
post #5 of 7
Well, I certainly can't afford a new CPU if I were to break my 4670K. I can only achieve a 4.7Ghz OC when I'm pushing vcore to 1.4V and cache vcore to 1.4V. I don't think delidding would do a whole lot for me in my particular situation.
post #6 of 7
Quote:
Originally Posted by SDub View Post

Well, I certainly can't afford a new CPU if I were to break my 4670K. I can only achieve a 4.7Ghz OC when I'm pushing vcore to 1.4V and cache vcore to 1.4V. I don't think delidding would do a whole lot for me in my particular situation.

It would definitely bring your temps down quite a bit, especially at 1.4v. Even delidded with water, I'm wary of putting that much voltage through my chip for long term resilience. If you're at 1.4v, you've most likely achieved your maximum overclock. You have VRING (cache) at 1.4? that is WAY too much...you're in danger of harming your chip. Even at a 47x core, if its requiring 1.4v for you to run cache, i'd suggest using a much lower UnCore multiplier. I'd suggest 38-40x on cache, if you're higher than that.

Sorry to get off topic redface.gif
post #7 of 7
Thread Starter 
So it is strictly about temperatures. The question was more technical than what one might think at first: I assumed that there is a possibility with the SAME temperatures to be a benefit. How that would occur is not exactly clear but I assume that there might be a way for the cooling to be more UNIFORM and therefore increase stability, or at least as an example.

I guess it is a bit far fetched, though I admit I wouldn't be totally sure without extensive testing. How to do that might be another problem since how can you test that hypothesis when by doing that at the same time you reduce temperatures?

Ah, perhaps by first trying with a stronger cooling and after dilliding with a weaker one (probably the same one on a lower setting). That way uniformity would be remaining but also the raw TDP dissipation would be keeping an equivalent temperature, if even that is possible easily.
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