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Haswell Overclock Thread
- Thread starter Wucked
- Start date
Yes you have been lucky.
My experience has been the opposite, so much so that i now only buy my OEM chips from traders who don't sell Overclocked chips/bundles.
Do you mean 1.128v cause with that kind of voltage in this weather, its goin to reach 95c+ on air cooling during stress test.
I have Megahalems dual fan with 1.20v its already hitting 90c+ during stress test with aida64.
No, 1.28v - it isn't stable though. At 1.128v it won't boot at 4.5GHz.
Just doing some testing now, at 4.4GHz it crashes fairly quickly under stress at 1.22v.
Edit: It looks like I'm going to need >1.25v just to get 4.4GHz stable.
Edit2: 1.25v exactly might be ok for 4.4GHz. I'm doing realistic stress testing for now - a Linux kernel compilation using all cores. It just completed without crashing at 1.25v. I've got hyperthreading enabled which I think can reduce overclocking stability?
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Try upping VRIN to 1.9v and CPU RING to 1.15v
I'm looking through the BIOS settings for these. Is VRIN the same as 'Initial CPU Input Voltage'? I can't find CPU RING, though 'CPU Digital I/O Voltage' is close to that at 1.116V.
I've left the cache multiplier on auto, though previously it was set to 4200MHz.
At the moment AI Suite is showing the CPU voltage as 1.248v and it seems stable at 4.4GHz. As it's so hot today I don't think it's worth trying to work out the temps.
Does this seem a bad CPU? I could return it for exchange (the CPU is from Amazon and two weeks old).
At the moment AI Suite is showing the CPU voltage as 1.248v and it seems stable at 4.4GHz. As it's so hot today I don't think it's worth trying to work out the temps.
Does this seem a bad CPU? I could return it for exchange (the CPU is from Amazon and two weeks old).
I haven't tried Prime95 or any serious stress testing because it's about 30C in here, but it's been fine all day today for general stuff. If I couldn't get to 4.2GHz I'd definitely have returned it - I just sold my Sandybridge set up which did 5GHz without a problem.
stable is very very subjective around here.
im not someone who can sit and stress test a machine for 3 days solid. i use it (after a small amount of prime) and if it crashes, its not stable. simples.
people will say its less stable then, but that machine could have crashed after 3 days of prime. you cant tell. so just use it as you would and see how it goes.
unless you are doing mission critical stuff where i wouldnt recommend overclocking at all.
im not someone who can sit and stress test a machine for 3 days solid. i use it (after a small amount of prime) and if it crashes, its not stable. simples.
people will say its less stable then, but that machine could have crashed after 3 days of prime. you cant tell. so just use it as you would and see how it goes.
unless you are doing mission critical stuff where i wouldnt recommend overclocking at all.
Oh I wouldn't stress test for more than an hour or so. Nothing I do normally would run the CPU like that. That's why I've done realistic stress testing so far. A Linux kernel compilation hammers the system perfectly for that kind of thing.
I say its below average. Personal I swap it until I get at less 4.6Ghz on 1.25v. What speed ur memory at?
If I was you who was upgrading from sandy 5.0ghz, I wont settle for anything less than 4.6ghz.
Its up to u end of the day, might end up worse.
