Not sure about Z97 PC Mate but today Intel sent me 4790K & G3258 ES chips.
But don't expect much on their overclock abilities because I believe will be the same like other ES





Better late than never.

I just bought a Core i5 4460 and fairly new to overclocking Intel CPU. My previous experience was only with AMD and that was like 5 years back. All the knowledge a bit rusty.

What is the CPU OC ability ? How far can 4460 go without increasing the voltage ?

did somebody con u. that is not a K.

max oc with bus speed 125 should be easy so

anything else i doubt u can unless u pair with a higher end mobo that can take care of pcie issues.

I'm not sure I understand, but I take it as a no ? What is the difference between K and no K ?

K was design as software overclocking via IMEI, Xtreme is pure clocking. No K/Extreme no multiplier clocking

Olden days we get Multiplier clocking on Extreme and Bus speed on non Extreme. because the walls were not that high. Ppl went for non-extreme due to leakage etc.

Since sandy bridge with the introduction of K, u can clock the multiplier. And with bios enchancement etc the K performs as well as extreme.
Hence the Extreme is only given to the highest platform the X series mobo, currently the 4960X and a bigger level 3 cache.

but with non-K since the thread speed is already fast, most of the cpu's are low clocked.. aka 34 multi with bus speed 100.
So most u can get out of it is 125 bus speed example on a cheap mobo. so around 4.25. But for stability since the pcie bus speed will also increase and to make sure ure sata bus speed doesnt increase.. u get those features etc for bus stability on higher end motherboards.

So its crazy buying a cheap cpu and high end mobo. when a K with lowest series Z87/Z97 is much better. Only benefit to non-k ( except for devil canyon) u get Vt-D

This post has been edited by cstkl1: Jul 25 2014, 06:35 PM

Received some retail Devil's Canyon processors for testing...



2x i7-4790K
L419B540 | vid 1.072v | 5.0GHz not bootable
L419B603 | vid 1.024v | 5.0GHz bootable @ 1.4v



5.0GHz core 1.425v / 4.8GHz cache 1.4v


1x i5-4690K
L419B703 - 5.0GHz not bootable, 4.6GHz 1.4v prime95 27.9 max 86c

This post has been edited by owikh84: Jul 26 2014, 04:28 PM

Testing IMC on air...

Hynix-MFR @ 3250MHz 12-15-15-35-1T

Could be higher and tighter with further tweaking

Samsung @ 2800MHz 9-12-12-25-1T


This post has been edited by owikh84: Jul 26 2014, 02:57 PM

Testing Integrated Memory Controller (IMC) of Intel Malaysia Pentium 20th Anniversary G3258 processor

G.Skill TridentX 2666MHz C10 Samsung RAM: 2800MHz 9-12-12-25-1T



Apacer ARES 3000MHz C12 Hynix-MFR: 3000 11-14-13-35-1T


Could go higher & tighter with further tweaking

Initial test of i7-4790K OC @ 4.6GHz @ 1.216v with Prime95 27.9


4.7GHz @ 1.28v


More to go...

This post has been edited by owikh84: Jul 27 2014, 12:01 PM

pretty good temp from with a aio watercooling, is that h100?

That's Tt 3.0 Extreme.

I am testing it on these coolers

Just got back my i7-4770k from RMA after last time bricking it for putting 1.9V on the cache voltage lol. This RMA CPU is crap at OCing lol...Tried booting Windows at 4.4GHz@1.28V fail immediately lol...1.2V at 4.0GHz also failed at Prime95 Blend. Regretting for frying my Malaysian made i7...Oh well at least they still RMA for me even though I fried it

average i7 4770k is doing 4.2-4.3g

yeah but my would need something like 1.3V++ to reach that

some update
now manage to get same 4.5g prime stable with lower vcore, 1.195v with higher dram speed, 2133MHz @ 10-12-10-27, 1T, 1.525vdimm.

why not prime 95 28.5? actually whats the correct stressing tool for haswell? its kinda hard to pass stability test on haswell with 28.5

Right now I really have no idea which is the best stressing app for Haswell/DC etc.
Newer Prime95 version might require higher vCore but it doesn't seem to stress other stuffs such as IMC, RAM etc.
LinX is good because from the GFlops values you would know that your OC is not "underperformed" than it should be but until now I'm still not sure whether the current version shows the correct GFlops. It may not stress the HT correctly.
I believe it's been debated until now. Some say the best stressing tool is the one which is causing the vCore to drop to the lowest point under load. Hmm...

Hi bros,

Just wondering.. you guys use offset or fixed vcore method for 24/7 usage?
I'm planning to get at least 4.7g or 4.8g for 24/7 use. I don't really want to manually feed 1.25-1.27v static vcore for a prolonged period as it might just kill the proc prematurely.

any ideas ?

yup.
over the years i had many so call prime stable, linx stable etc all fail when i do long encodes..

the issue is always not the vcore or cpu on high clocks.

as cpu goes up, other factors come in and mainly its pll, switching frequency etc etc especially with high dram speeds, low timings, low imc timings

overvolting vcore will mask this instability but true colors will be shown in encoding etc especially with avx instructions etc.
or even chrome on its mem paging and swapping.

hence i just run a few test but more importantly is always imc/ram stability rather than cpu vcore.
and always check scaling. for me its 3dmark11 physx. each multi must increase atleast 200-250 points and must be consistent after 10 runs. if not than theres some issue.
gsan
so 3dmark physx for 4790k should be.
4.5ghz 13000, 4.6ghz 13250, 4.7 13500, 4.8 13750 etc.

it will be sweet to get a 14k on everyday running comp. estimated 4.9ghz. but i forsee not possible atm with the current cooling or just some limitation somewhere. it could be even the bios was designed for a specific type of cpu scaling voltage etc. high dram speeds will show more instability and not necessary its always vcore. hence the initial guides of haswell are all wrong. owikh test may not be so vcore prone but its more stressfull as its stressing all the other voltages together. heat and thermal limits also test cpu leakages etc and hence with the inbuilt IMC u may see other failures that are not vcore related.

its very vague but ultimately all test can only be perform on better cooling. Even phase has its own issue with haswell.

This post has been edited by cstkl1: Aug 1 2014, 02:30 PM

Easy......(bootable)



This post has been edited by stasio: Aug 2 2014, 03:38 AM