How many watts extra is needed for overclocking?

[thetrystero]

I'm thinking of overclocking my potential new build with a 3570k to about 4.8 GHz

How many watts allowance above a standard non oc setup do I need to accomodate this overclock?

 

[Maximilian]

Buy one of these things and find out:

http://www.amazon.co.uk/Plug-In-Power-and-Energy-Monitor/dp/B000Q7PJGW

Seriously they're very useful, i never knew my crummy smoothie maker still sucked juice even when it was off until i bought one of those things

Anyways to give you a vague idea with my 4.4ghz oc on a 2600k, idle power consumption dosent change, it needs about 20-30 watts extra under load though. It is highly voltage/chip dependant, with ivy being even more efficient than sandy it shouldnt use a huge amount, good luck getting to 4.8ghz though thats a pretty high target.

 

[996GT2]

It depends on voltage, but figure a max load power draw of 120-150W for a 3570K @ 4.8 GHz

 

[ViRGE]

Here's a good example of what to expect:

 

[thetrystero]

Here's a good example of what to expect:

There's a huge difference in power consumption between static and dynamic. Which should Ibe looking at ?

 

[guskline]

Try this link for a psu calculator:
http://www.extreme.outervision.com/psucalculatorlite.jsp

I also have a KILL A Meter like Maximillion showed. It measures your actual wattage draw. From the tone of your post, I think you are asking what PSU will be enough. Remember in you power calculation to include all fans, usb devices etc. Always look at the highest power usage to assure you have a big enough power supply unit. Will you be adding an extra video card? Don't overkill but don't shave it too close either on a PSU.

 

[T_Yamamoto]

I think he wants voltage. From reading his post it seems like he wants to oc and doesn't know what to raise the volts to?

 

[Idontcare]

There's a huge difference in power consumption between static and dynamic. Which should Ibe looking at ?

The power-consumption is the sum of the static and dynamic power usage. So you add the two (which is what the red and green lines themselves represent).

There's a few more graphs in this thread, if you are interested.

The following graph may be a bit clearer in terms of showing you what you are interested in seeing (clockspeed versus power consumption, just look at the blue squares here):

At 4.8GHz, you are going to have to delid your 3570k to get there if you want to be LinX stable, but you are looking at basically an extra 100W to push your 3570k from its stock clockspeeds to 4.8GHz.

(peak power use when using LinX/UIBT for the CPU will climb from ~50W at stock to ~150W at 4.8GHz)

 

[Idontcare]

I think he wants voltage. From reading his post it seems like he wants to oc and doesn't know what to raise the volts to?

OP, if you are looking for voltage, try the following as a guide (look at the blue squares), you are looking at ~1.31V for 4.8GHz if you have good cooling, higher than 1.31V if you don't have good cooling.

The minimum voltage needed for stability will itself be temperature dependent too, so if you are running warmer (using a less efficient cooler) then you Vcore will need to be higher to compensate. (the green line in the graph below)

 

[thetrystero]

I think he wants voltage. From reading his post it seems like he wants to oc and doesn't know what to raise the volts to?

I'm looking for wattage for a psu.

 

[thetrystero]

Try this link for a psu calculator:
http://www.extreme.outervision.com/psucalculatorlite.jsp

I also have a KILL A Meter like Maximillion showed. It measures your actual wattage draw. From the tone of your post, I think you are asking what PSU will be enough. Remember in you power calculation to include all fans, usb devices etc. Always look at the highest power usage to assure you have a big enough power supply unit. Will you be adding an extra video card? Don't overkill but don't shave it too close either on a PSU.

No extra gpu, just the one evga gtx650

 

[thetrystero]

The power-consumption is the sum of the static and dynamic power usage. So you add the two (which is what the red and green lines themselves represent).

There's a few more graphs in this thread, if you are interested.

The following graph may be a bit clearer in terms of showing you what you are interested in seeing (clockspeed versus power consumption, just look at the blue squares here):

At 4.8GHz, you are going to have to delid your 3570k to get there if you want to be LinX stable, but you are looking at basically an extra 100W to push your 3570k from its stock clockspeeds to 4.8GHz.

(peak power use when using LinX/UIBT for the CPU will climb from ~50W at stock to ~150W at 4.8GHz)

I don't think I'm ready to delid. Will 4.4 still be ok without delid? I'll be having 4 case fans, one cpu fan, probably noiseblocker or ap15, in a prodigy on an asrock z77e itx, one gtx650, 3 hdd and one sdd. Will I be able to get by with 500w?

 

[thetrystero]

Try this link for a psu calculator:
http://www.extreme.outervision.com/psucalculatorlite.jsp

I also have a KILL A Meter like Maximillion showed. It measures your actual wattage draw. From the tone of your post, I think you are asking what PSU will be enough. Remember in you power calculation to include all fans, usb devices etc. Always look at the highest power usage to assure you have a big enough power supply unit. Will you be adding an extra video card? Don't overkill but don't shave it too close either on a PSU.

That looks useful and I think I'll get one for monitoring after setting up my rig. But for now i need to decide on the correct wattage psu so it'll not help after the fact

 

[thetrystero]

OP, if you are looking for voltage, try the following as a guide (look at the blue squares), you are looking at ~1.31V for 4.8GHz if you have good cooling, higher than 1.31V if you don't have good cooling.

The minimum voltage needed for stability will itself be temperature dependent too, so if you are running warmer (using a less efficient cooler) then you Vcore will need to be higher to compensate. (the green line in the graph below)

I think I'll have temps be my limiting factor then. I'll clcok to whichever speed will give me 70degrees. Isn't that the safe upper bound recommended by Intel? I'm willingd to ssacrifice speed for safety. Do i need any fancy gadgets to get accurate temperature readings or will the thermometer on the board do? I'm using an asrock z77e itx

 

[Idontcare]

I think I'll have temps be my limiting factor then. I'll clcok to whichever speed will give me 70degrees. Isn't that the safe upper bound recommended by Intel? I'm willingd to ssacrifice speed for safety. Do i need any fancy gadgets to get accurate temperature readings or will the thermometer on the board do? I'm using an asrock z77e itx

Use Coretemp or Realtemp, don't rely on the temperature software that comes bundled with your mobo (they are usually wrong).

Your processor can safely operate up to TJmax, which is 105C for your processor.

At TJmax the processor is designed to throttle itself without your intervention, keeping it safe from damage.

You really have no concerns when it comes to operating temperatures.

The only reason we OCers worry about operating temperature is because a throttling cpu is a slow-performing cpu, which kinda defeats the point of OCing it in the first place. So we buy better heatsinks and so forth to keep our temperature down while getting the max clockspeed out of it.

Are you going to be using the stock heatsink or do you have a 3rd party heatsink you will be using?

Stock HSF will get you to about 4.2GHz before the cpu reaches TJmax and starts throttling.

 

[thetrystero]

Use Coretemp or Realtemp, don't rely on the temperature software that comes bundled with your mobo (they are usually wrong).

Your processor can safely operate up to TJmax, which is 105C for your processor.

At TJmax the processor is designed to throttle itself without your intervention, keeping it safe from damage.

You really have no concerns when it comes to operating temperatures.

The only reason we OCers worry about operating temperature is because a throttling cpu is a slow-performing cpu, which kinda defeats the point of OCing it in the first place. So we buy better heatsinks and so forth to keep our temperature down while getting the max clockspeed out of it.

Are you going to be using the stock heatsink or do you have a 3rd party heatsink you will be using?

Stock HSF will get you to about 4.2GHz before the cpu reaches TJmax and starts throttling.

I'm planning on either the xigmatek dark Knight ii night hawk edition (ceramic), noctua nh u9b se2 or the be quiet shadow rock sr1. TThis is with tropical ambient. Are those sufficient? I'm trying to stay away from water for now.

 

[thetrystero]

One other question. Is the oc process Os dependent? I'm running Os x. So will I need to install Windows as well, oc in windows then switch over to Os x or can I reliably oc in Os x?

 

[Idontcare]

One other question. Is the oc process Os dependent? I'm running Os x. So will I need to install Windows as well, oc in windows then switch over to Os x or can I reliably oc in Os x?

I've OC'ed for linux and windows, but never OS X so I can't speak to that. It stand to reason that you could, via the BIOS settings, but you'll want confirmation from someone who has (and I haven't). Hopefully another member will chime in here to answer your question.

 

[thetrystero]

So will 100W above stock be a reasonable allowance for my choice of psu? I'm thinking 400W for stock on my rig so ill need to get a 500w psu. Sounds about right?

 

[thetrystero]

I've OC'ed for linux and windows, but never OS X so I can't speak to that. It stand to reason that you could, via the BIOS settings, but you'll want confirmation from someone who has (and I haven't). Hopefully another member will chime in here to answer your question.

Ok, sounds like it'll be best if I oc in windows since there's more support for that. When I reboot in to Os x, the oc won't be undone right? It'sa property of the bios not Os is that right?

 

[jvroig]

A good quality 500W PSU will be more than enough: Seasonic, Corsair, Antec, Silverstone, get from them (and a couple of others I may have missed).

If you get a cheap PSU from some unknown Chinese/Taiwanese company, the labeled wattage won't really be helpful.

In short, if you want to be assured it will be enough, tell us what specific brand and model you are looking at for your PSU, and we'll be better able to provide useful input.

Ok, sounds like it'll be best if I oc in windows since there's more support for that. When I reboot in to Os x, the oc won't be undone right? It'sa property of the bios not Os is that right?

Yes, that is right, it's set in the BIOS, not an OS thing.

 

[thetrystero]

I was aiming for the be quiet system 450 but they're out, so maybe the strider essentials 500 80+ sound ok? Seasonics are really nice but expensive.

 

[jvroig]

so maybe the strider essentials 500 80+ sound ok?

Yes, that's perfectly fine.

 

[thetrystero]

Yes, that's perfectly fine.

Sweet! I'm good for power then.

 

[thetrystero]

And water not necessary for oc to 4.5, even in tropical ambient right?