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Haswell Overclock Thread

james_2k said:
what kind of stress? if its p95 etc then dont bother reducing. i bet it wont get near that in normal use.
Click to expand...

That's just under 3dmark, as soon as I launch p95 temps hit the roof. I am having to use 1.35v though, with haswell temps were always going to become insane.

I can boot into windows with 1.3v but I get bsod as soon as I run any program, 1.35v has allowed me to run any benchmark looped for 30 mins. Not a proper stress test but p95 causes it to throttle.

One question I have though guys, is it worth me delidding? I know I won't get any more speed, just a lot better temps. I'm half tempted to just leave it at 4.2ghz at 1.15v, the extra voltage/heat/power doesn't seem worth it the more I think about it.
 
if you will keep it then id say yes. i think ill do mine soon. apparently its a good 20c difference, which may actually get you better speeds as you wont be thermally limited as much!
 
I will definitely be keeping this one, it's too costly to keep changing, and tbh I could end up with worse!

Will probably delid later today, won't have time over the next few days.
 
8 Pack said:
What Uncore speed and what DRAM speed you running. You dont show the memory tab which with Haswell is also important.
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Everything default/auto other than increasing cpu multiplier, vcore and setting memory to XMP profile, which set my vengeance pro at 1866, can't remember exact timings. Still setting up the watercooling so haven't really checked out the UEFI very thoroughly yet.
 
Delid complete, just need to put some liquid ultra on :-)

So much gunk underneath the ihs though, it's no wonder temps were terrible. Will post the temp drops later on.
 
I used a blade from hobbycraft. Took about an hour, the ihs didn't seem to want to come off but all of sudden all of the corners gave way in the space of a couple minutes.

Thanks Simon :-). I delidded a 3570k and got a 18c reduction, I'm hoping for at least the same. My aim is to be able to run 4.5ghz in silence. That would be fantastic :-D
 
Back up and running all delidded :)

1.26v to run 4.3ghz p95 for 30 mins, temps max out at 75c. That's all in silence :D

Now that still seems a little toasty to me given the voltage and frequency. But, having said that, I have noticed a 20c drop, so it's still pretty good.

Edit: Can run 4.6ghz but it takes 1.45v, temps are 74c during 3dmark physics test, which means it will be around 90c+ in p95. I'll leave that for benchmarking, looks like 4.4ghz 1.325v will be my daily silent clock.
 
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It most certainly is high but this chip isn't one of the great clockers :|. Still, compared to my last one which would barely do 4.1ghz at 1.35v this one is awesome :).

Delidding has worked though, currently running 4.6ghz with 4.4ghz cache at 1.45v (high I know, just testing atm). Temps so far haven'g exceeded 75c in benches i.e. 3dmark. Like I said before, p95 would more than likely send temps 90c+ so I'm avoiding that.
 
I did some proper testing of my chip last night...

4770K L315B402 OEM
M6E Motherboard
G.Skill TridentX 2666MHz Ram at Stock XMP
Fairly basic Air cooling

These are all with no settings in the bios changed apart from Ram set to XMP, vCore, CPU multi and Cache Multi set manually. BCKL at 100.
I then tested each for Boot into windows, SuperPI 32M and Prime95 (10 minutes)

4.6GHz (43 Cache) @ 1.150v 75c
4.7GHz (44 Cache) @ 1.175v 80c
4.8GHz (45 Cache) @ 1.250v 91c

I really need to remove the lid and get this under water before taking it any further.

I am hopping to try it under LN2 this weekend and 8Pack tells me that removing the lid may lessen the LN2 ability, so will wait a bit and see what its like under ICE first.

I also have a 360 rad on order for my test bench as I don't really want to put this setup into my case just yet.

My earlier post of 32M at 5.0GHz and 1.280v is nowhere near prime or day to day stable, but I dare not find out what voltage it will take to be stable at 5GHz until its cooling is better controlled.

My chip also seems quite good with regards Ram...
I can run my TridentX 2666 at 2800 12,13,13,28,1T.
I also have some older G.Skill PSC which does 2400 8,11,7,28,2T, or 2133 7,10,7,21,1T

It is pure luck with regards the performance of each chip. My first 4770K was L311B515 same as people posted with earlier and that one was ok, but not brilliant needing 1.40v for 5GHz. So even the same batch is no guarantee of performance.
 
8 Pack said:
What Uncore speed and what DRAM speed you running. You dont show the memory tab which with Haswell is also important.
Click to expand...

Just got water cooling finished so did a quick Aida test at 4.6 with memory tab open, haven't tweaked memory at all other than to set the command rate to 1t, Uncore? is that the cpu cache speed? if so I've set that to same as cpu speed, I think it's displayed as NB speed in mem tab of cpuz.


will have to reseat cpu as I'm getting some pretty inconsistent temps across the cores, doesn't look too bad in that shot but 0,1 seem to be running 10 degrees or more hotter than 2&3 in the OCCT linpack test which I ran at 4.8ghz with 1.25 vcore, 0 and 1 were hitting 90+, this is with dual 480 rads, DDC ultra pump, 8 rad fans, 4 case fans, may have messed up the seating so will have another go before I consider de-lidding.
 
smit101 said:
Just got water cooling finished so did a quick Aida test at 4.6 with memory tab open, haven't tweaked memory at all other than to set the command rate to 1t, Uncore? is that the cpu cache speed? if so I've set that to same as cpu speed, I think it's displayed as NB speed in mem tab of cpuz.
Click to expand...

Yeah uncore is the CPU cache speed. You could probably lower the temps a bit by lowering the uncore and its voltage (it's a separate setting). That said, your temps are looking just fine. Mine runs a fair bit hotter than that on 4.6.
 
Shiari said:
Yeah uncore is the CPU cache speed. You could probably lower the temps a bit by lowering the uncore and its voltage (it's a separate setting). That said, your temps are looking just fine. Mine runs a fair bit hotter than that on 4.6.
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They're hot running chips alright, OCCT linpack seems to raise temps the most of the tests I've tried so far. Just ran Aida @ 4.8, 1.21 vcore, 46 cpu cache speed, ran ok for over an hour.



 
got my i7 stable at 1.21 volts 4.4ghz, im happy with that as the last one wouldn't go past 4.2, just wondering if you guys can help me out so my core voltage down clocks when idle, my frequency is down clocking fine but i cant fin the option to down clock the voltage, i think its called adaptive mode in the msi bios but i have a ga z87x ud4h ? thanks in advance
 
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