Hi all Sifu(s)

My previous processor is 2500K, fixed overclock at 4.5GHz. Quad core.
I just change to i3-4160 3.6GHz, Dual core with HT
Same HD 7950 GPU.

I wonder why i3-4160 perform faster in OpenGL in benchmark, about 50% more
and it's way faster when I play Final Fantasy 13, seriously faster at 60fps, i5 4.5GHz can merely hit 30 fps..
However, when I bench others like 3D mark firestrike, it's bottlenecked and much slower than the old i5.

Any idea why? cos I don't think i3-4160 can be any faster than 4.5GHz 2500K.
Because of new AVX 2.0 instruction?

Gave up on the i7 5775c that i've waiting, ordered an i7 4790K, can't wait to OC it d, my target will be 4.5/4.6Ghz below 1.2v
just give me luck that I strike a CPU lottery, haha.
Guys, wondering if you guys overclock the base or the Turbo? If Turbo will only limit to 2 cores/ 1 core right?
Thanks in advance

no problem, The CPU can handle higher than that

What's your core speed and voltage? on what kind of cooler?
Better to keep it lower for longevity of your CPU life

Ivy bridge, and stock cooler!! no wonder so hot..
Just throw a CM 212, and you can do much better than that..
BTW, wrong topic bro, here's Ivy discussion thread https://forum.lowyat.net/topic/2314027

Received my 4790K today, Batch number X508C179
So it's a February chip from Vietnam

Overclock on Air
4.8Ghz = no luck at 1.305V, I'm looking for a 24/7 balance, hence that voltage is too much for me


4.7Ghz = 1.275V , I think this might be the sweat point, now looking for balance of heat and power consumption
*Stress test, >80 self restart (Lucky didn't kill my CPU)

4.6Ghz = 1.25V, AIDA64 Temperature <80C
1.24V AIDA64 Temperature +-75C (Cannot pass Stress Test)

4.5Ghz = 1.2V, Not Stable
1.2V, AIDA64 (Stress 10 minutes) Temperature 68c

Final = 4.5Ghz 1.214 Temperature 68+-


This post has been edited by rudolfjie: Jun 20 2015, 01:33 AM

Apparently my CPU not a great one, 4.5Ghz @1.214V (I saw some at 1.18v )
So far happy with <70C during stress test. However after I change from manual voltage to adaptive, even thought I set my OC voltage at 1.214v, But still the CPU crank up to 1.29 during stress test.. Offset auto..
At the end I set my offset to -0.075 to achive 1.214v. Is that normal?

This post has been edited by rudolfjie: Jun 20 2015, 01:38 AM

Guys, Sifu, Guru.... Please correct me if i'm wrong
Currently My 4790K Stable at 1.22v
Once I change the voltage from manual to ADAPTIVE, It shot up to around 1.28v even my OC Voltage set at 1.22v

So in order to achieve my 1.22v with adaptive. I applied an offset of 0.06
(1.29-0.07 = 1.22v)

Volla, now idle around 0.65v, Full Load 1.22v (Yup, 1.22 for 4.5Ghz doesn't looks good... no luck on chip lottery)
So far stable, but is my way correct? or there's other way of applying adaptive ?

Thanks and much much appreciated for any answer

This post has been edited by rudolfjie: Jun 22 2015, 12:38 PM

Thanks, I will try it tonight
So my way of keeping the peak voltage is wrong?
cos i found it stable. but wanna change it proper way

I've been follow Broadwell news quite some time, here's what i know.
Broadwell not design for overclock, although there's someone who push to 5Ghz on air @ over 1.419v, but no one can proof that's stable, that guy only able to do a screenshot. but recent review, there's no one achieve above 4.3ghz. Most of them stable at 4.2 @1.36v (That's very high) http://www.maximumpc.com/intel-broadwell-d...7-5775c-review/

For me, I go with 4790K. Now stable 4.5Ghz @1.22v Cinebench R15 Multicore 900+
IPC broadwell 4.2Ghz = Haswell refresh +-4.5Ghz
Price way higher than Haswell refresh, expect around hundred+ premium, unless u need iGPU (which is very close to GTX750 level).
From history, Intel seldom decrease the price for old products.. it just discontinued.

Skylake will launch at August, expect another 5% gain on IPC. But it's gonna need Intel 100 chipset. Some rumor said it has double IMC, can support DDR3 and DDR4 depend on the MOBO. By that time, everyone getting DDR4, and sooner or later, the price will drop eventually

This post has been edited by rudolfjie: Jun 25 2015, 10:06 AM

Envy , mine can only achieve 4.7 at 1.3x.