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***Official Ivybridge Overclock Thread***

hanluc said:
Have you tried clocking it with HT on?
Click to expand...



Whats the crack with ht.
With my 4.5ghz 3770k with ht on and vsync off i get around 20/30 more fps in dirt 3 benchmark and it should all 8 threads at around 80% usage, halfway through the bench fps dips for awhile as the cpu is the bottleneck but its still in the 140/150's .

With ht off i get 100% cpu usage on 4 cores but i have around 20/30 fps lower, allso the dip in the bench is a lot lower.

This proves to me as i'm seeing it that a i7 with ht on is faster than a i7 with ht off?

So confused but as the ht dirt3 benchmark i've done shows the 8 threads being faster while gaming??
 
I seem to be having some real trouble getting my overclock settings to do anything.

I have an i5 3570k and Gigabyte Z77-D3H.

The steps I followed were:
1) Disable Turbo, CPU Enhance Halt, C3/C6 State Support, CPU Thermal Monitor and CPU EIST Function
2) Set the base clock to 100.00
3) Set the CPU Clock Ratio to 40
4) Set the voltage to 1.2

All the settings are showing fine in the BIOS and show the CPU running at 4000, however when I enter windows RealTemp shows the 4000 for a couple of seconds then drops to 3400, this never increases above 3400 from then on even when running Prime 95. CPUz also shows 3400.

Is there something I am doing wrong causing this?
 
dan1987 said:
I seem to be having some real trouble getting my overclock settings to do anything.

I have an i5 3570k and Gigabyte Z77-D3H.

The steps I followed were:
1) Disable Turbo, CPU Enhance Halt, C3/C6 State Support, CPU Thermal Monitor and CPU EIST Function
2) Set the base clock to 100.00
3) Set the CPU Clock Ratio to 40
4) Set the voltage to 1.2

All the settings are showing fine in the BIOS and show the CPU running at 4000, however when I enter windows RealTemp shows the 4000 for a couple of seconds then drops to 3400, this never increases above 3400 from then on even when running Prime 95. CPUz also shows 3400.

Is there something I am doing wrong causing this?
Click to expand...
Try using CPU-Z instead of RealTemp to monitor your CPU speed. RealTemp could be mis-reading.
 
Vincentx said:
It needs 1.26v with HT. So far, except for benchmarks, HT seems to be faring better for me in my games (BF3, Skyrim, Diablo3, WoW)
Click to expand...

so we should all turn it back on? ;) i remember the only reason i turned it off with my i7 920 was arma 2 didn't like it and it caused microstutter... don't know if they have changed the way it works so it will be fine now?
 
butmuncher said:
Whats the crack with ht.
With my 4.5ghz 3770k with ht on and vsync off i get around 20/30 more fps in dirt 3 benchmark and it should all 8 threads at around 80% usage, halfway through the bench fps dips for awhile as the cpu is the bottleneck but its still in the 140/150's .

With ht off i get 100% cpu usage on 4 cores but i have around 20/30 fps lower, allso the dip in the bench is a lot lower.

This proves to me as i'm seeing it that a i7 with ht on is faster than a i7 with ht off?

So confused but as the ht dirt3 benchmark i've done shows the 8 threads being faster while gaming??
Click to expand...

Some games utilize more than 4 threads, I guess Dirt 3 must be one of them.
 
Just ordered my 3570k along with a Windforce 3X 670 and some Samsung green to complete my build. Will have a play with overclocking tommorow afternoon/evening :)
 
After some more experiments got my Offset working (I was under the impression Auto gave 0 offset but this isnt the case (it just scales when on auto).

So found i needed +Offset which works great! Now done 7 hours on Prime whilst playing Diablo3 got no Whea errors and max temp on a hot hot day like today was 75c!

Speedstep and Voltage scaling brilliantly.

Very very impressed with Ivybridge now I'm going to sit back and enjoy the new hardware!

Good luck with your OC's everyone!


Cotti
 
Cotti said:
After some more experiments got my Offset working (I was under the impression Auto gave 0 offset but this isnt the case (it just scales when on auto).

So found i needed +Offset which works great! Now done 7 hours on Prime whilst playing Diablo3 got no Whea errors and max temp on a hot hot day like today was 75c!

Speedstep and Voltage scaling brilliantly.

Very very impressed with Ivybridge now I'm going to sit back and enjoy the new hardware!

Good luck with your OC's everyone!


Cotti
Click to expand...
gratz :) i'm going to dabble again with the offsets when i get home, couldn't get speed step to work with it last night... which was odd :P


also stole this form another forum from google search.... i was wondering about the contact pressure with the h80...

Another thing we've seen occasionally, more so recently, is some boards seem to be thinner than others. Easy to check if you have the H80 removed. Put the H80's backplate on the board, maybe hold it there with some masking tape, and then check the other side. If the nuts on the backplate stick up out of the holes in the mother board, or if you screw in the standoffs and the backplate is loose, meaning the standoffs don't touch the mother board, then you've got the thin board thing.
Click to expand...

now i remember screwing the stand screws into the base plate and there being 1-1.5 mm gap between the bottom of the standoff section of the screw and the back plate wobbling. so wonder if i put a few rubber washers around the back plate sockets if it will give me that little bit extra contact pressure...

i've also just ordered some liquid pro :D let's see if these combined can drop my temps a few degrees atleast....still tempted to slice the chip open and use liquid pro on that too :p
 
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I've had no luck with offset. Tried +.035 for 4.4ghz which passed Linx but crashed a few times in game. Not sure why it's not stable as that equals 1.26v under load and using fixed voltage I have no stability issues at 1.24 under load.

Cotti - how much + offset did you use and what does CPUz report under load for vcore? Nice OC btw! :)
 
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AndyH_Lufc said:
I've had no luck with offset. Tried +.035 for 4.4ghz which passed Linx but crashed a few times in game. Not sure why it's not stable as that equals 1.26v under load and using fixed voltage I have no stability issues at 1.24 under load.

Cotti - how much + offset did you use and what does CPUz report under load for vcore? Nice OC btw! :)
Click to expand...

I used +0.130v offset, CPU-z reports 1.240v for a Prime95 small fft run. I got a stable overclock before I tried offset then just kept upping a bit till CPU-z reported the same voltage under load. This probably isn't the proper way to do it but worked for me.

Cotti.
 
I'm trying to overclock my 3570k on a Gigabyte z77-d3h board and I'm slightly confused as how to do it with the power saving features still one.

I've set the turbo multiplier to 40 and the voltage offset to +0.025, default voltage shows up as 1.125 and for some reason under load the voltage jumps upto 1.21v.

Any idea why it's doing this?
 
Not having much luck with my 3570k

currently stressing @ 4.4GHz @ 1.25v according to BIOS (1.256v according to CPUZ). It failed prime (with AVX) at 1.24v.

probably due to the motherboard (ASUS P8Z77-V LX), Knew I should have passed on the good deal I got it for lol.

All I've done is changed the Vcore, not messed with anything else. Is there anything I can try to help me get 4.4GHz at reasonable volts? My options are limited with this board, but there's a reasonable amount of options to try.

Link to board
http://www.overclockers.co.uk/showproduct.php?prodid=MB-514-AS&groupid=701&catid=5&subcat=2261
 
Just tried different LLC settings and All of them seem to overvolt it on load, the lowest I can get it to settle at with the voltage offset at 0.025v is 1.176 with LLC on Standard. If I try any other LLC settings it goes upto 1.212 on load.
 
Arron17 said:
I'm trying to overclock my 3570k on a Gigabyte z77-d3h board and I'm slightly confused as how to do it with the power saving features still one.

I've set the turbo multiplier to 40 and the voltage offset to +0.025, default voltage shows up as 1.125 and for some reason under load the voltage jumps upto 1.21v.

Any idea why it's doing this?
Click to expand...

Not knowing all the settings you have it could be something else but i would imagine it's as follows:

This is how offset works basically. At the stock 3.4Ghz it would be 1.15v with the +0.025 offset. However the vid logic shifts based upon a programmed override table thats built into the chip iirc, the same way auto works instead of manual voltage.

With a multiplier of 34x the VID is 1.125v according to the table and this is what the Vcore will be at stock. However if you go upto 35x multi (we're completely ignoring the standard turbo here btw) then according to thetable the VID would be 1.175v instead maybe and the auto would set the vcore appropriately.

This is why in this thread: http://forums.overclockers.co.uk/showthread.php?t=18406503 when he upped the multiplier to 44x, according to the table the Vcore needed to be at 1.44v to run at that frequency (they tend to be worst case scenario's for the worst of the worst CPU's hence why the auto setting is **** and will usually overvolt a lot more than needed).

the offset is an offset of this vid table, so for you the vid table states that you need 1.185v for a 40x multiplier and with the +0.025v offset it equals 1.21v. So for your needs you'd probably need a minus offset to get it down to only the voltage your processor needs to run at 4Ghz.

Feel free to correct me if anyone knows better as it's insanely hard to find any information on vid surprisingly and I am by no means well informed on this subject.
 
anyone see the Spanish guy's results from replacing the TIM between the Silicon and Case ? about 20C at 4.7 ? wow

seriously - Intel must have to take notice soon - I'm beginning to think the termperatures are fairly unacceptable - especially if it is to do with the manufacturing process

I'm running only 4.5 gig on my 3770k (note K - I "paid" for overclocking) - decent Noctua cooler, decent case and getting 92C during handbrake encodes

not great really
 
Buckster said:
anyone see the Spanish guy's results from replacing the TIM between the Silicon and Case ? about 20C at 4.7 ? wow

seriously - Intel must have to take notice soon - I'm beginning to think the termperatures are fairly unacceptable - especially if it is to do with the manufacturing process

I'm running only 4.5 gig on my 3770k (note K - I "paid" for overclocking) - decent Noctua cooler, decent case and getting 92C during handbrake encodes

not great really
Click to expand...

what do you think they will do???

will there be a rev.2 do you think? its very strange such an elementary error made on intel's part.
 
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