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Discussion Starter #1
Hi all,
I found that there are two ways of OCing the CPU via the BIOS. The way I've been doing it is adjust the frequency of each core using the Intel Turbo Boost. So for a quad core, I would set whatever speed I wish to OC on all 4 cores and enable Turbo Boost, while leave your base multiplier untouched. The other way is simply set the main multiplier at your desired speed.

Now my question is, do both give the same result / performance?
 

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turbo boost will lower the multiplier to its norm when the CPUs at idle but I have'nt heard anyone suggest overclocking through that before. I don't believe overclocking with turbo boost is as stable at higher clock speeds, we want the numbers changing as little as possible.
 

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Discussion Starter #5
Quote:
Originally Posted by nazarein View Post

turbo boost will lower the multiplier to its norm when the CPUs at idle but I have'nt heard anyone suggest overclocking through that before. I don't believe overclocking with turbo boost is as stable at higher clock speeds, we want the numbers changing as little as possible.
This is how this person OC using Turbo Boost:

http://www.guru3d.com/articles-pages/core-i7-3770k-and-3750-review-with-z77,13.html

Quote:
"
The procedure is as follows:

1. Leave baseclock for what it is right now
2. If optional, increase the TDP limit of your processor to 200~250 Watts
3. With a 3770K leave your base multiplier at 35
4. And now set the per core (Turbo) multiplier at a maximum of your liking, we applied an MP of 49 on all four cores
5. Increase CPU voltage, though setting AUTO might work fine, we applied 1.40V on this intel board.
6. Make sure your processor is properly cooled (we used a Noctua D12 heatpipe cooler and forced the fan to 60% RPM)
7. Save and Exit BIOS / UEFI
"
 

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I like the idea, but I would suggest using the stock voltage. For example, what is the VCORE of the CPU under load at stock settings, when turbo kicks in? go in BIOS, set that VCORE and find out what the max multi you can use 24/7 prime at that VCORE. Then, just go back and put the system on turbo mode, set turbo multi's to the MAX OC at the stock max VCORE under turbo. Yes?

For example, let's say it's an i5.

The i5 reaches 3.8GHz at 1.34v in turbo mode.

Reboot, disable turbo crap, start OCing. Do not pass 1.34v

Find max OC under 1.34v

Set the max OC as your new turbo multi's, enable turbo

I might do this.
 

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Discussion Starter #7
Okay, I am more confuse, can someone show me the "proper" way of overclocking. I've been reading some literature on the topic, but I can't seem to find any simple ways of doing it.

What I've been doing so far is set a multiplier, say 42, on each of the 4 cores, enabled Turbo Boost, and set everything else to Auto (even voltage).

So that means the cpu is at stock clock when idle, and OC takes place when Turbo Boost kicks in. Everything seems to be stable so far and temp is not too hot.

So it this okay or what? The thing is, with this method, the overclocking only takes place when Turbo Boost kicks in. What if Turbo Boost, for some reason, failed to start?
 

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Turbo Boost is always active, so there is no worry that it won't start or something.

On a Gigabyte board, the two methods you mention both work the same way. Changing the single multiplier on the main page is has the same effect as changing them all individually on the advanced page. So just use whichever you want. On other boards it may be different though.
 

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Discussion Starter #9
Quote:
Originally Posted by Forceman View Post

Turbo Boost is always active, so there is no worry that it won't start or something.

On a Gigabyte board, the two methods you mention both work the same way. Changing the single multiplier on the main page is has the same effect as changing them all individually on the advanced page. So just use whichever you want. On other boards it may be different though.
But if you change the single multiplier on the main page, your CPU clock speed will be whatever you set it to at ALL TIMES. Am I right? To me, that sounds better because your clock speed would be consistently at what you set it to. Whereas through Turbo Boost, you clock speed varies from stock to OC and everywhere in between. The advantage in that is you are saving some power when CPU is at idle.
 

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Quote:
Originally Posted by driedupfish View Post

Quote:
Originally Posted by Forceman View Post

Turbo Boost is always active, so there is no worry that it won't start or something.

On a Gigabyte board, the two methods you mention both work the same way. Changing the single multiplier on the main page is has the same effect as changing them all individually on the advanced page. So just use whichever you want. On other boards it may be different though.
But if you change the single multiplier on the main page, your CPU clock speed will be whatever you set it to at ALL TIMES. Am I right? To me, that sounds better because your clock speed would be consistently at what you set it to. Whereas through Turbo Boost, you clock speed varies from stock to OC and everywhere in between. The advantage in that is you are saving some power when CPU is at idle.
You didn't understand it. Both are exactly the same on a Gigabyte Z77 board. Changing the single multiplier does exactly the same as going to the advance page and manually changing all four numbers to that single value. Turbo speed is actually always on, stock speed never used.

When you see different speeds in Windows, it's actually Windows that reduces the clock speed. The CPU and board do nothing about that by themselves. It's not about turbo. If you want it to stay at highest speed, you have to either disable the power saving features completely in the BIOS (I think it's that EIST "Enhanced Intel Speed Step"), or you have to go into the Windows power profile options and set minimum cpu speed to 100%.

I actually lied about turbo always being on. There's a power limit on the page with the turbo settings. If it goes over that power limit, it will drop to stock speed 3.4ghz or 3.5ghz.
 

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Discussion Starter #11
Quote:
Originally Posted by deepor View Post

You didn't understand it. Both are exactly the same on a Gigabyte Z77 board. Changing the single multiplier does exactly the same as going to the advance page and manually changing all four numbers to that single value. Turbo speed is actually always on, stock speed never used.

When you see different speeds in Windows, it's actually Windows that reduces the clock speed. The CPU and board do nothing about that by themselves. It's not about turbo. If you want it to stay at highest speed, you have to either disable the power saving features completely in the BIOS (I think it's that EIST "Enhanced Intel Speed Step"), or you have to go into the Windows power profile options and set minimum cpu speed to 100%.

I actually lied about turbo always being on. There's a power limit on the page with the turbo settings. If it goes over that power limit, it will drop to stock speed 3.4ghz or 3.5ghz.
Thanks for the reply. Under what condition does it go over this power limit? Should I raise it to avoid the clock speed from throttling? If so, what's a good number?

Is it called the TDP limit ?
 

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I don't know if that's the same limit. You can check what the hardware thinks its current use is in HWINFO or HWMonitor somewhere. There are "package power" and "core power" readings.

If you leave everything on Auto on that page, and instead manage things with that single multiplier from the previous page, it should just work. If you use those four values manually, I've heard you might have to raise it. The max values are 1200W and 300A for those two settings in the BIOS.

My i5-3570k actually never gets up to those 77W that seem to be default, but I've once set the limit to something like 60W as an experiment and it definitely works. It will reduce speed to 3.4ghz for me if I run prime95 or IBT, but not for that Cinebench CPU test. This was at 4.6ghz I think. I don't know if the readings actually change with the overclock speed and voltage or are just a very rough guess. The i7-3770k probably sees different values with its hyperthreading.
 

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I have the ud3h also op, its a good motherboard.

Taken from my 3770k overclocking guide here - http://www.overclock.net/t/1392279/info-intel-3570k-3770k-overclocking-tips

To be set before starting overclock

On Gigabyte Z77X-UD3H Motherboard (hopefully the names for voltage settings etc wont be too different across motherboards.)

M.I.T\Advanced Frequency Settings

CPU Clock Ratio - 40
System Memory Multiplier - 16 or change to your stock ram speed determined by 100mhz x value. I.e for 1333mhz ram type 13.33

M.I.T\Advanced Frequency Settings\Channel A Timing Settings

DRAM Timing Selectable - Quick
CAS Latency - 11 or change to your stock ram timings
tRCD - 11 or change to your stock ram timings
tRP - 11 or change to your stock ram timings
tRAS - 11 or change to your stock ram timings

M.I.T\Advanced Voltage Settings\CPU Core Voltage Control

CPU Vcore - 1.070v Stock setting

M.I.T\Advanced Voltage Settings\DRAM Voltage Control

DRAM Voltage - 1.50v or your stock RAM voltage

And thats it! These are the only settings we need to change so far. All we have done is changed the cpu multiplier to 40 to give us an overclocked speed of 4.0Ghz at stock voltage, most if not all cpus should be able to run 4ghz at stock voltage. We have also set the stock ram settings so as to ensure the ram doesnt become overclocked and interrupt getting the cpu overclock stable. Remember to put your own RAM speeds/voltages in at this point in the bios.

Then just test in prime95 if you want to make sure its stable, all you need to change after prime is multiplier then increase cpu vcore until your happy.
 

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Discussion Starter #14
Quote:
Originally Posted by deepor View Post

I don't know if that's the same limit. You can check what the hardware thinks its current use is in HWINFO or HWMonitor somewhere. There are "package power" and "core power" readings.

If you leave everything on Auto on that page, and instead manage things with that single multiplier from the previous page, it should just work. If you use those four values manually, I've heard you might have to raise it. The max values are 1200W and 300A for those two settings in the BIOS.

My i5-3570k actually never gets up to those 77W that seem to be default, but I've once set the limit to something like 60W as an experiment and it definitely works. It will reduce speed to 3.4ghz for me if I run prime95 or IBT, but not for that Cinebench CPU test. This was at 4.6ghz I think. I don't know if the readings actually change with the overclock speed and voltage or are just a very rough guess. The i7-3770k probably sees different values with its hyperthreading.
So I am guessing leaving the limit at default of 77 W should be fine, as I have only OC my i5-3570k to 4.2 Ghz. You are saying even at 4.6 Ghz, yours never reach the 77 W, right? Or were you talking about that at stock speed.
 

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Quote:
Originally Posted by driedupfish View Post

Quote:
Originally Posted by deepor View Post

I don't know if that's the same limit. You can check what the hardware thinks its current use is in HWINFO or HWMonitor somewhere. There are "package power" and "core power" readings.

If you leave everything on Auto on that page, and instead manage things with that single multiplier from the previous page, it should just work. If you use those four values manually, I've heard you might have to raise it. The max values are 1200W and 300A for those two settings in the BIOS.

My i5-3570k actually never gets up to those 77W that seem to be default, but I've once set the limit to something like 60W as an experiment and it definitely works. It will reduce speed to 3.4ghz for me if I run prime95 or IBT, but not for that Cinebench CPU test. This was at 4.6ghz I think. I don't know if the readings actually change with the overclock speed and voltage or are just a very rough guess. The i7-3770k probably sees different values with its hyperthreading.
So I am guessing leaving the limit at default of 77 W should be fine, as I have only OC my i5-3570k to 4.2 Ghz. You are saying even at 4.6 Ghz, yours never reach the 77 W, right? Or were you talking about that at stock speed.
That was overclocked. I tried to tweak things to never go higher than a certain temperature, but it was a bit of a failure, so I gave up. I never compared with other speeds. You should check it out for yourself. I could imagine those power readings just being a guess built out of percentage of load without actually involving speed and voltage at all. HWINFO seems to have the most sensor readings to look at so I'd recommend that program.

That's the settings from that time:



If you change the 34 at the top to 46 and revert everything else to Auto, it will behave the same.

This here is how to get voltage to dynamically change depending on load and go down for idle:



While I'm posting screenshots, these settings are the most important:



Those three screens were literally the whole overclocking. When it crashed, it always only needed increased vcore voltage for me, nothing else.
 
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