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Haswell Overclocking Guide [With Statistics] - Page 125

post #1241 of 19566
Quote:
Originally Posted by Scarytiger View Post

I ran 5 passes of cinebench @5.0 1.3v, but it choked on handbrake. 1.325 would probably do it, but I'll stick with my sweet spot for now.

What are tonights lottery numbers going to be?
post #1242 of 19566
Quote:
Originally Posted by Scarytiger View Post

I ran 5 passes of cinebench @5.0 1.3v, but it choked on handbrake. 1.325 would probably do it, but I'll stick with my sweet spot for now.

Every chip has a "sweet spot" like you stated, but going above it (4.9 or 5.0) will likely be harder to stabilize than you'd expect. Of course every chip is different, so it is difficult to say at what multi it will occur. If you look at the results in the first post there is a reason that not many members run above 4.8.

With my 4670K it is all pretty predictable steps in voltage up to 4.7, but then all of the sudden 4.8 needs much more effort to truly stabilize. I have booted into Windows and run benchmarks @ 4.8 but any stress tests fail within a hour or two. Every setting is more sensitive, and the margin of error shrinks substantially. Since it wants even more voltage temps begin to really limit my ability to stress it with my typical routine. Linpack is out of the question, and IBT gets up to the upper 90s. Prime and OCCT are still ok, but they can take a while to find errors. I prefer to use Linpack and IBT for quick initial stability tests while tweaking and then finish it off with a long run of Prime or OCCT. I have dabbled trying to stabilize it, but I instead focused my attention on my 24/7 OCs of 4.6 and now 4.7.

So I am just letting you know that 4.9 and 5.0 can be more difficult thresholds than you expect. The CPUs seem to get very fussy and voltage hungry at those clocks, so I am just giving up the heads up.
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post #1243 of 19566
Yep p95 has not been updated to stress the new instruction sets, avx2. It can not cope with adaptive voltage, thus in turn overvolting the cpu. Unless you set your vcore mode to manual or static. Use whatever works for you. I just recommend xtu because it does not face these challenges, it is developed by intel and updated fairly frequently.

When I suggest xtu to a noobie it usually saves me time and headaches when helping with an overclock. It is the only software I have found that displays all system vitals..ring ratio, ring voltage piv...etc
post #1244 of 19566
How do you guys define stock VID? Do you just set it to x35 manually and check what it shows, for example mine would be 1.04v in this case? If I check it under Cinebench it's 1.035v. If I check it under Prime Blend it's 1.09v.

Also when posting temps, can you mention if you're delidded.
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post #1245 of 19566
@BangBang I know what you mean. I'm not going to bother pushing the limits anymore. My 2500k wouldn't run stable at anything over 4.5. I obsessed over it for months, tweaking this and that, only to find that it just wasn't a great chip. I don't use synthetics anymore because I could be stable for hours on occt or prime and it would crash on bf3 or video encoding. IMO if you're not an extreme overclocker that loves benching, you should keep it simple and find that sweet spot with reasonable voltage and temps. I'm saving myself the headache this time around.
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post #1246 of 19566
No matter what I have done, I have not been able to get 4.2 stable besides 1.26 volts which seems higher tan most people. Batch #L313B335
Current stable 4.2 x42 uncore 35, ram 1600, core volts 1.26, everything else auto. Intel extreme test resulted in 90c max temp on package but core 0 hit 98
going to just run 4.0ghz at 1.23 volts and leave it alone. I got a great deal on the processor and won't be able to return it.

Any other ideas? Currently running hyper evo, thinking of getting a h100i.
post #1247 of 19566
Quote:
Originally Posted by Takinato View Post

No matter what I have done, I have not been able to get 4.2 stable besides 1.26 volts which seems higher tan most people. Batch #L313B335
Current stable 4.2 x42 uncore 35, ram 1600, core volts 1.26, everything else auto. Intel extreme test resulted in 90c max temp on package but core 0 hit 98
going to just run 4.0ghz at 1.23 volts and leave it alone. I got a great deal on the processor and won't be able to return it.

Any other ideas? Currently running hyper evo, thinking of getting a h100i.
The H100i would get you up around 1.3v. Worth a shot I suppose.
Edited by Scarytiger - 8/27/13 at 8:01pm
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post #1248 of 19566
Quote:
Originally Posted by Takinato View Post


Any other ideas? Currently running hyper evo, thinking of getting a h100i.

Overclocking Haswell really demands a quality cooler if you want to push your clocks.

the hyper evo is not a good quality cooler imo. you would be better off with nocuta nhd-14 if you like air cooling, since they offer free socket mounting hardware in the future if you change motherboards.

i would suggest minimum 240mm AIO cooler for your best results like the h100i.

is the swiftech h220 available in your region? apparently not available for US customers????

my fav cheapo 240mm is the thermaltake water extreme 2.0. i think it performs better than the h100i because the rad is thicker, but then you dont get corsair link, which i could care less about on any give sunday.

http://www.memoryexpress.com/Products/MX39192


the swiftech h220 is by far my Favorite AIO cooler
Edited by ProKoN - 8/27/13 at 8:06pm
post #1249 of 19566
Quote:
Originally Posted by Scarytiger View Post

@BangBang I know what you mean. I'm not going to bother pushing the limits anymore. My 2500k wouldn't run stable at anything over 4.5. I obsessed over it for months, tweaking this and that, only to find that it just wasn't a great chip. I don't use synthetics anymore because I could be stable for hours on occt or prime and it would crash on bf3 or video encoding. IMO if you're not an extreme overclocker that loves benching, you should keep it simple and find that sweet spot with reasonable voltage and temps. I'm saving myself the headache this time around.

Yes, I agree. Although I initially started at 4.4, then jumped up to 4.6 for a while and am now at 4.7, so I can't say that I necessarily settled. But I didn't force it either, I just gradually found my sweet spot. Initially when I switched to 4.7 I thought that the thermals from going from 1.225V to 1.285V would be too much and I just figured that I would end up back at 4.6. But they are only slightly higher for gaming, benching, and video compression and nearly identical at idle so I have decided to stay at 4.7.

So basically everyone is different, and so are their rigs and cooling systems. So I wouldn't want to generalize and say that people shouldn't go for their highest stable OC. But I would warn some that chasing a specific OC multi can be a pipe dream, and even dangerous if rushed. I would always suggest putting in the time to get to know your particular chip and what it likes through trial and error. But you definitely seem to have plenty of experience and already know the deal. On the other hand it sounds like you have a keeper and you likely get good thermals with those voltages, I wouldn't want to hold you back either...
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post #1250 of 19566
Well I just realized that my case is only able to fit smaller ones like kraken x40 and h80i. The h100i fits with modification to case which I'm willing to do but not sure of the other 240mm radiators.
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