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The Gigabyte Z87/Haswell Overclocking(OC) Guide - Page 264

post #2631 of 3251
So i have a 4670k and a G1 sniper z 87 board running on a 212 evo

At stock(with turbo enabled) my bios shows the Cpu vcore at 1.069

Am i right in assuming, putting the vcore manually to 1.2 and the core multipliers to 42x would be a good starting point to begin OC'ing and finding stablity?,4.2-4.4 is the range of im hoping to be able to achieve

fwiw under IBT at stock im getting temps around 55-60c(max)

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post #2632 of 3251
Quote:
Originally Posted by MrMD View Post

So i have a 4670k and a G1 sniper z 87 board running on a 212 evo

At stock(with turbo enabled) my bios shows the Cpu vcore at 1.069

Am i right in assuming, putting the vcore manually to 1.2 and the core multipliers to 42x would be a good starting point to begin OC'ing and finding stablity?,4.2-4.4 is the range of im hoping to be able to achieve

fwiw under IBT at stock im getting temps around 55-60c(max)

Grab x264 from haswell overclocking thread with statistics (for testing) and try:

1.23vcore set
1.85vrin
vrin llc max or 1-2 levels down
33x cache/uncore/ring @ 1.15v

^manual volts

start at ~44x core multiplier, adjust it up/down without changing volts til you're stable. That's the best starting point i think you can really do with haswell
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post #2633 of 3251
Is it more stable to try OC trough the base clock (and what values whould i put for base clock) or do it the standart way?
post #2634 of 3251
Standard way
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post #2635 of 3251
Quote:
Originally Posted by Cyro999 View Post

Lot of people are few hundred mhz below average, but a lot also throw way more vcore than actually needed
No argument there.
post #2636 of 3251
Just wanted to throw my results in the ring for more data points.
4770k w/ H80i AIO Water cooler
Overclocked to 4.4Ghz

VRIN LLC - Extreme
VRIN External Override - 1.7V
Vcore - 1.233V
Ring voltage - 1.15V

Idle - 32*C
Typical Gaming Load - 59*C
Aida64 Stress Test - 83*C
post #2637 of 3251
Quote:
Originally Posted by lantis View Post

Just wanted to throw my results in the ring for more data points.
4770k w/ H80i AIO Water cooler
Overclocked to 4.4Ghz

VRIN LLC - Extreme
VRIN External Override - 1.7V
Vcore - 1.233V
Ring voltage - 1.15V

Idle - 32*C
Typical Gaming Load - 59*C
Aida64 Stress Test - 83*C
Nice.
Welcome to OCN!
post #2638 of 3251
Hi wave2.gif

On Gigabyte boards, is there any way to set turbo cache frequency other than by using the 35 multiplier which, at 47 turbo multi on the cpu, equates to a 40 turboed cache multi on my system?

I liked the fact that the cache frequency is adaptive when set at 35 but don't want to end up bottle-necking my cpu in any way so have set the cache to 44 to keep within 300mhz of the cpu. I see however that then fixes the frequency at 4400mhz rather than it being adaptive like my cpu frequency.

I'd like to save energy if at all possible but not at the expense of performance.

I have a z87x-ud4h and 4770k.

Might as well throw my results in while I'm here:

cpu: 4.7ghz at 1.244v
cache: 4.4ghz at 1.215v
32c idle / 60ish load on custom water - AIDA64 with FPUs gets to 68c
Edited by gpcola - 3/8/14 at 7:06am
post #2639 of 3251
Haswell Cache has twice the bandwith than Ivy bridge. That means it is not a must to have a high cache frequency. The Performance gain is very little if you compare lets say x38 to x42. Very few applications and mostly benchmarks will profit from higher cache frequency. Gain is like 1-2%.
Disadvantage is that it makes it more difficult to become an OC stable if you OC cores and cache at the same time.
Cache frequency of 3800 or 3900 Mhz is fast enough for most OC scenarios. Some peole even use a lower cache frequency.
A high uncore ratio can bring stability when it comes to very high OC like 5000 Ghz.

With Gigabyte it is either 8-40 when OC or you can set a fixed cache frequency like x40 for instance.
Edited by Alxx - 3/8/14 at 7:38am
post #2640 of 3251
Thanks Alxx - I thought that it wasn't necessary to have a 1:1 cache/cpu relationship but that you ought to keep within 300-500mhz of the cpu frequency as stated by the OP? I've seen the 300mhz figure quoted by a number of sources. With a 700mhz gap between the two am I likely to lose much?

Actually thinking about it - what app should I use to get an idea of the actual performance difference?

My usage can be very varied - from media consumption / creation, rendering and gaming, to basic office stuff. I can imagine, from what you've said, that I'll not even notice it in most, if any, of those scenarios but it would be nice to be able to pin it down to a number somehow.
Edited by gpcola - 3/8/14 at 9:36am
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