***Official Intel Haswell Thread***

[ratters]

I was thinking about doing this. For 24/7 use I'm sat at 4.6GHz @1.27V which is handbrake/BF3 stable but I'm thinking that for flight simulator x have a dedicated profile (possibly with hyperthreading disabled). But then it's a lot of hassle for a relatively small gain of 200MHz. Also not sure if anyone else is on the UD3H but I've found the early bios' particularly F3 better for overclocking?

Well seems happy at 4.5 at @1.31v after that no it seems to get more crashy as i up the voltage highest i tried was 1.375 but it just rebooted when i got into prime so 4.5 seems the limit atm.

 

[Mr Whippy]

Anyone tried upping the strap speed and running much lower multipliers?

 

[StonedPenguin]

What vcore you guys using as an upper limit in custom wc loops?

So far got 4.5 stable at 1.232 vcore but it needs 1.285v for 4.6, Only other setting change is turning off all C states

Might try for 5ghz

 

[ratters]

Judging from the jumps in voltage I wouldn't be surprised if you need nearly 1.4v to get 4.7 stable. But its worth a shot let me know your results will be interested in the voltage increases are you only changing Vcore ?

 

[StonedPenguin]

I will give it a go today mate, Yeah just changing the vcore, Though I've changed the uncore to 1x multi behind the cpu multi now. uncore - 4.5 - multi - 4.6

3 hours prime95 @ 4.6/1.285 was stable but it wasn't stable after 30 mins of BF3 mp lol (bsod 0124), Adjusted to 1.29v and bf3 was fine for hours.

Is it worth just chucking BF3 mp on a 64man map for stress testing as prime doesnt seem to cut it..

 

[setter]

Bf3 will expose instability pretty quickly, seen the same with my 3770k.

 

[1kiwi]

I will give it a go today mate, Yeah just changing the vcore, Though I've changed the uncore to 1x multi behind the cpu multi now. uncore - 4.5 - multi - 4.6

3 hours prime95 @ 4.6/1.285 was stable but it wasn't stable after 30 mins of BF3 mp lol (bsod 0124), Adjusted to 1.29v and bf3 was fine for hours.

Is it worth just chucking BF3 mp on a 64man map for stress testing as prime doesnt seem to cut it..

Atleast with Sandy, Prime Blend would expose instability within seconds - Perhaps BF3 will provide a more well rounded test however I don't think it puts anything like the stress on a CPU that Prime/IBT will.

 

[sprite-]

I've have the following;

- i7 4770K
- ASUS Z87 PRO
- Corsair H80
- Silverstone FT02 (With air predator fans)

Using AI Suite 3 on 'Extreme' tuning, it overclockers to 4.9ghz.

Seems stable, hasn't crashed through any gaming (BF3) or doing 3D Mark test multiple times.

Ran Prime95 (Small FFT) for 20 mins and temps went to 80 at highest point, thats with case fans at 'High' and H80 on performance mode.

 

[vonex]

Bf3 will expose instability pretty quickly, seen the same with my 3770k.

yup and crysis 3!

 

[shadow_boxer]

+1 for BF3. I had mine on 4.8GHz with what I thought was stable with handbrake. Loaded up BF3 and blue screened within about 10 mins. Definitely a great way to test stability.

 

[Mr Whippy]

I've have the following;

- i7 4770K
- ASUS Z87 PRO
- Corsair H80
- Silverstone FT02 (With air predator fans)

Using AI Suite 3 on 'Extreme' tuning, it overclockers to 4.9ghz.

Seems stable, hasn't crashed through any gaming (BF3) or doing 3D Mark test multiple times.

Ran Prime95 (Small FFT) for 20 mins and temps went to 80 at highest point, thats with case fans at 'High' and H80 on performance mode.

That seems like a great result from the automatic tuning.

I keep being tempted to run the auto-optimisation (I run the same mobo as you), but haven't dared yet as the computer is stable and fast enough.

Did you do any tuning via BIOS or was it all done in AI Suite in Windows?


Dave

 

[sprite-]

That seems like a great result from the automatic tuning.

I keep being tempted to run the auto-optimisation (I run the same mobo as you), but haven't dared yet as the computer is stable and fast enough.

Did you do any tuning via BIOS or was it all done in AI Suite in Windows?


Dave

Nope it's completely done by the AI Suite III

When you select to run the optimisation it reboots your PC, then tuning begins. Normally it starts you at 4.3ghz and ramps up .1ghz each time with a load test, then reaches a point where i guess it's happy. Mine ends up on 4.9ghz, it then reboots your PC again and shows a summary of what your CPU is now clocked at.

http://www.3dmark.com/3dm/1189085

Get a pretty decent firestrike score out of my PC.

 

[teppic]

What voltage is it using for 4.9GHz? Must be quite high!

 

[sprite-]

On a full load test the vcore was showing as 1.254

Although it only shows as 4.8ghz on CPUID?

I'm assuming this is due to turboboost, i believe when all four cores are taxed it won't show the full overclock? If i run prime95 on only 2 cores it will show as 4.9ghz.

AI Suite III is using adaptive voltage i believe?

 

[sprite-]

Here ya go.

Idle

After 20 mins on Prime95 (Small FFT)

For some reason when i run a full Prime95 test (Small FFT) it only shows as 4.8ghz, if i run say on 2 cores it'll goto 4.9ghz. I believe this is something to do with speedstep / turboboost?

 

[Razyre]

Makes me very sad seeing people hitting such high OCs in some cases.

My chip is stable 4.5 @ 1.3v but I haven't toned down the voltage yet. Seemed very reluctant for 4.6, I couldn't get it stable under AIDA64 stress even at 1.32v. I might make a big bump up to 1.35 and see if I can get it to stay.

If you want to have a laugh, download OCCT, do a linpack bench with AVX extensions and watch your CPU rocket in temperatures. I was watching a Linustechtips video and discovered that the voltage regulator being on die has caused some serious issues with temps for some people, so much so that Intel are taking it back off chip for Broadwell (I think that was the case anyway).

4.5GHz is by no means bad though and I have to be honest, I don't need the damned thing above 3.5/3.9GHz anyway. These CPUs are so powerful now that for most intents and purposes you don't need the extra power, unless you're doing heavy rendering/workstation programs. I don't use these so it doesn't bother me too much.

 

[Makhaira]

Not OC'd mine yet, just got it set up at stock yesterday under air, idles at 26C with fans at silent, and under full load it maxes around 58C with large FFT's on Prime95. Seems like a good set of temps so next step is to get it bumped up a bit!

 

[sprite-]

4.5GHz is by no means bad though and I have to be honest, I don't need the damned thing above 3.5/3.9GHz anyway. These CPUs are so powerful now that for most intents and purposes you don't need the extra power, unless you're doing heavy rendering/workstation programs. I don't use these so it doesn't bother me too much.

I'm just OCing to see how flexible my CPU is tbh.

While i could happily run it at 4.9ghz as shown on quite a low voltage and reasonable temps, i really don't need to. My CPU is currently set as stock for normal use, i'll ramp it up to 4.3-4.5ghz when i feel my PC needs it in years to come.

 

[Razyre]

I'm just OCing to see how flexible my CPU is tbh.

While i could happily run it at 4.9ghz as shown on quite a low voltage and reasonable temps, i really don't need to. My CPU is currently set as stock for normal use, i'll ramp it up to 4.3-4.5ghz when i feel my PC needs it in years to come.

Much the same here.

 

[Make]

Well you know, you could always use the power-saving technologies and your CPU will not go any higher than "needed" anyway, even if oc'd. Going up to max. MHZ will not harm the CPU at all if its done within reasonable volts, and especially if it only goes up there for a few minutes when its needed. Windows is pretty intelligent.

I'm not saying you should OC, I just don't see any reason why not to..