Overclocking a 780TI, first time!

Footyslayer · 25 Mar 2015 at 18:45

Hi everyone, I have decided to overclock my Inno3D ichill 780ti whilst I await the 980ti's to come out! This would be my first overclock on an nvida card so am just looking for a little guidance...

So when under stress or 100% load my card currently hits...

1.175v

1201Mhz on core boost (1085 normally I think) but apparently should be 1150Mhz on the boost, WTF?

3600Mhz on the memory.

http://www.techpowerup.com/gpudb/b2869/inno3d-ichill-gtx-780-ti-dhs-herculez-x3-ultra.html

What is the best software to use for nvidia? What would be safe temperatures for this card and what sort of voltage should I look at for safeness? About 1.200v?

africanos23 · 25 Mar 2015 at 18:55

Boost clocks vary, I personally use MSI Afterburner.

High 70s I guess should be fine (your aftermarket cooler is pretty solid).

No need to start pushing voltages unless you hit your max OC on stock voltages (will keep the temps down).

Start with the core, something like +50mhz and move up in +25mhz.

Try Unigine Heaven on loop and watch temps and for artifacts.

If temps are ok and no artifacts move up your OC. Then when you start seeing artifacts move back 1 level and start on the mem.

I think there's an overvolting guide somewhere on the forums let me link that to (this is just a general guide I posted here for OCs)

Edit : here it is http://forums.overclockers.co.uk/showthread.php?t=18545210

I think though don't go there yet until you learn the ropes

Footyslayer · 25 Mar 2015 at 20:31

Cheers,

I don't really want to overvolt to be honest. I would probably be happy with about 1275-1300 on the core if I can get that. If not then I won't overvolt, I don't feel comfortable doing that really.

If the boost on my card should be 1150Mhz but is actually hitting 12.01Mhz is this a sign that the previous owner changed something on the card?

africanos23 · 25 Mar 2015 at 20:35

Probably not, as I've seen a few reviews (and from personal experience on other cards) boasting a higher boost clock than what is mentioned in the specs.

You probably got a good chip imo.

I am lazy when overclocking and usually just start from 100mhz+, never had a problem and most of my GPUs can do a lot more than that. Doubt you will have any problems (be sure to check temps though).

Gregster · 25 Mar 2015 at 20:38

This might help. Skins have changed but the rules still stand

http://forums.overclockers.co.uk/showthread.php?t=18494374

africanos23 · 25 Mar 2015 at 20:43

Gregster said:
This might help. Skins have changed but the rules still stand

http://forums.overclockers.co.uk/showthread.php?t=18494374

Thanks Greg was looking for a 780Ti specific one on the forum but couldn't. Guess this does the trick.

Gregster · 25 Mar 2015 at 20:44

africanos23 said:
Thanks Greg was looking for a 780Ti specific one on the forum but couldn't. Guess this does the trick.

No problem. It is old but still does the job and some handy info there.

Footyslayer · 25 Mar 2015 at 20:58

Thanks again,

so far I have 1.225v but only managed to get an extra 23 on the core taking it to 1225. Temperature only hit 60c.

Voltage wise where is the danger zone? Is 1250v safe or should I avoid that etc?

joeyjojo · 25 Mar 2015 at 21:01

More volts always means more heat and more danger of damage to transistors, there's no "danger zone", it's a sliding scale.

africanos23 · 25 Mar 2015 at 21:02

Yeah better to just take it as high as you can on the core (you might be happy even on stock voltages) before messing with voltages.

Footyslayer · 25 Mar 2015 at 21:44

I can't get it above 1200Mhz on stock volts of 1.175v.

1225Mhz I need 1.225v and see a very millisecond glitch or artifact. Might not even be an artifact but I notice it very minimally, it's there for a split second. 60c is the top temp at that volt.

so based on that if I went to 1.250v I should be ok as I won't likely hit above 65c-70c?

Footyslayer · 25 Mar 2015 at 22:35

Sorry for the double post.

Had a few crashes on anything above 1230v on the card! I have managed to get stable on +24 on the core to give me a boost to 1225Mhz, with 1.230v and a top temperature of 60c.

Onto the memory, does that seem a decent place to be at with the core clock?

Divine Pain · 25 Mar 2015 at 22:37

I wouldnt put volts in it imo. the 780/ti cards were hot as it was the last I remember

darket · 25 Mar 2015 at 23:28

Divine Pain said:
I wouldnt put volts in it imo. the 780/ti cards were hot as it was the last I remember

Oh my lord, volts . heat ? on a 780ti , get out of town

780ti's love volts (unless the asics really low)

Firstly , ditch Afterburner and Use EVGA PX.

Next find a decent bios that unlocks 1.212 volts (or more if the card allows) and the power limit .

You say you had 1.230v , where did you read this from ? , if it was from afterburner then its lying to you.

Footyslayer · 26 Mar 2015 at 15:09

Well I added +55mV to afterburner on the core voltage. I assumed this meant I was then on 1230mv as the stock volts is 1175mv! So afterburner is fibbing and hasn't actually added any volts it seems

My asic is 77.9.

So I have now added +25mv to the volts on evga precision but when under stress it still only shows 1175mv and not 1200mv, all I see there is overvoltage, overboost and KB Boost, which should be used for applying a voltage change?

Footyslayer · 26 Mar 2015 at 19:02

Actually hold on, is the card voltage locked to 1175mV perhaps?

darket · 26 Mar 2015 at 19:27

Footyslayer said:
Actually hold on, is the card voltage locked to 1175mV perhaps?

Firstly activate overvoltage , then test again.

Oh and activate Kboost, this will max out the clocks and voltage, you dont need to keep it on , its just useful to see what the volts and max boost are.

Footyslayer · 26 Mar 2015 at 19:41

darket said:
Firstly activate overvoltage , then test again.

Oh and activate Kboost, this will max out the clocks and voltage, you dont need to keep it on , its just useful to see what the volts and max boost are.

I've activated overvoltage, added 25mV to it but when under stress it still only hits 1175mV and not the 1200mV I am trying to set :confused:

darket · 27 Mar 2015 at 01:17

What does Gpu-z say ?

You probably need to flash the bios to unlock power limits and voltage.

Footyslayer · 27 Mar 2015 at 03:13

Where should I look in GPU-Z?

VDDC says 1.1750v.

I assumed that 780TI's would let you go up to 1212mV before you needed to flash the BIOS or change anything specific? At this point I will be happy to get my card to 1200mV but it just doesn't seem to register when I make changes!