Overclocking the GTX 680

Rusty0611 · 24 Mar 2012 at 01:13

Share some settings for overclocking your card - see how far it can be pushed.

I'm going for 1100 tomorrow hopefully if I can work out how the overclocking works!!

Sin_Chase · 24 Mar 2012 at 01:33

1100 is only 41Mhz more than the stock boost speed and even at stock the card will see ~1080 so you will get there no problem.

Rusty0611 · 24 Mar 2012 at 01:47

Sorry I didn't explain myself properly. I meant 1100 stock and then whatever it is with the boost. I must admit I have no idea how far it can be pushed

Sin_Chase · 24 Mar 2012 at 02:50

One of the reviews I looked at listed the Maximum Stable overclocks at 1300Mhz Core and 1550ish Memory.

I do not know if they had any access to voltage adjustments though. I do not think anyone does yet so might be even more headroom.

TheRealDeal · 24 Mar 2012 at 02:52

Sin_Chase said:
One of the reviews I looked at listed the Maximum Stable overclocks at 1300Mhz Core and 1550ish Memory.

I do not know if they had any access to voltage adjustments though. I do not think anyone does yet so might be even more headroom.

Theres mixed results around the web with some saying there cards falling over at +100 with 130% on the power target. I think this is still good for around 1200 core though so not bad.

Sin_Chase · 24 Mar 2012 at 02:55

The review I read ran 30 minutes of looped Heaven for stability testing but there could be big variances between cards.

Perhaps some push the voltage up more or are simply just better silicone to handle X Mhz with the current voltage caps.

Rusty0611 · 24 Mar 2012 at 12:23

So is it just a case of upping the memory and core offset and then testing for stability and increasing the power where necessary?

Rusty0611 · 24 Mar 2012 at 12:29

Sin_Chase said:
One of the reviews I looked at listed the Maximum Stable overclocks at 1300Mhz Core and 1550ish Memory.

I do not know if they had any access to voltage adjustments though. I do not think anyone does yet so might be even more headroom.

The tool Gibbo recommended (EVGA Precision X) allows you to fiddle with the voltage. It's a little different to overclocking that I'm used to on a graphics card though

weecka · 24 Mar 2012 at 13:01

I tried +120% power limit, +175 core and +500 memory (as memory oc's like hell on these) and got about 1k+ pts on 3dmark11 (passing 10k P score mark) with no crashes whatsoever, and temps staying ~80C

Rusty0611 · 24 Mar 2012 at 19:19

What's acceptable temperature for the GTX 680s?

Mine runs around 70-75c when fully in use (Boost mode active).

Edit: with a fan blowing right on it as well

555BUK · 24 Mar 2012 at 21:58

Rusty0611 said:
What's acceptable temperature for the GTX 680s?

Mine runs around 70-75c when fully in use (Boost mode active).

Edit: with a fan blowing right on it as well

Up to 85deg should be fine (same as for 7970's), but I wouldn't go any higher.

Rusty0611 · 24 Mar 2012 at 22:32

555BUK said:
Up to 85deg should be fine (same as for 7970's), but I wouldn't go any higher.

Ta

Rusty0611 · 24 Mar 2012 at 22:35

I got a stable run with the following settings:

I tried 180mhz core overclock but it crashed every time in Unigine Heaven at the boat bit. Just posting in case someone else is looking to overclock and wants a point of reference. My card doesn't seem like a super overclocker and from what I've found looking around, this looks to be a fairly decent (although not brilliant) overclock.

Jakus · 24 Mar 2012 at 23:36

Get the temps down !, You have to keep the cards below 70c

Rusty0611 · 24 Mar 2012 at 23:38

I've got no chance of keeping it below 70c even on stock settings.

Sin_Chase · 24 Mar 2012 at 23:40

Same. At stock under load mine sees 75 Deg C.

Antec 900 not the best for cooling but acceptable.

Rusty0611 · 24 Mar 2012 at 23:42

I don't think it's even possible with the stock cooler to be fair. Why 70c anyway? Is there any source to your claim that it should be kept under 70c?

Sin_Chase · 24 Mar 2012 at 23:48

I think the card internal algorithms will let the card push more voltage/clock speeds when 70 Deg C or lower temps are observed.

I've not seen any hard data to support this theory yet though.

Jakus · 25 Mar 2012 at 00:06

Rusty0611 said:
I don't think it's even possible with the stock cooler to be fair. Why 70c anyway? Is there any source to your claim that it should be kept under 70c?

Looks like you have not tried, Why do you think there is a fan control ?

Just do 2 tests first then I will explain.

Bench with the fan on auto and report max temps, then manually fix fan speed to 70% and do the same (use something like Crysis 2 or Heaven should work) and we need max temps from the OSD

Your the guy that said it runs at mid 70's were you not ?...think you will find that's impossible (on Auto fan)

But let us know the results

Sin_Chase · 25 Mar 2012 at 00:12

Mine runs at mid 70s on Auto Fan.

So no, it's not impossible.

70% Fan is loud as hell