*** GTX 670 Overclocking Thread ***

[Boge]

Yup. 1.175 here too. Ah well. At least my i5 is golden. I can reach 5 on that on air , no problem at all. Can't have everything eh?

 

[pgi947]

Yup. 1.175 here too. Ah well. At least my i5 is golden. I can reach 5 on that on air , no problem at all. Can't have everything eh?

Very true, the reason I asked is that while using a Zotac bios I noticed the boost voltage was only sitting at around 1.150v, I had to use the voltage slider in PX to force it to 1.175v, so not all cards default to the maximum.

 

[pgi947]

1.175 here running heaven, theese need voltage control unlocked badly. Particularly as the wf run's so cool.

IF it happens some of these chips are going to wipe the floor with everything. Imagine 1.275v under water, would be knocking on the door of 1500mhz surely.

 

[andybird123]

sorry guys, it can't happen, all the 670's are hardware locked to 1.21v (when read with a voltmeter directly) which reads as 1.175 in software... unless they do a hall of fame edition type of thing, there won't be any volt modding without a soldering iron involved

anyhoo, my results

Make & Model: EVGA basic (not SC)
Best Boost clock: 1251 (after 70C declock - hits 1270 before that)
Temp: 75
Noise: fan on full, quite noisy (like a whoosh noise, no mechanical whine)
Heaven Score: 1251
Heaven Avg. FPS: 77.2

this is ok, but what has really impressed me is that if I down clock it to 1201 I can leave the fan on 1:1 degrees for % so it sits at 65C and 65% fan even in this hotter weather which is barely audible over my case fans and I still get high 1900's in heaven
also looks like I have a good candidate for water, if I can keep the temps down I'm sure it will do a little more

1201 at 64C image

 

[andybird123]

the windforce is certainly the most consistent in terms of high clocks and low temps whilst being audible or even not heard over case fans in a few cases
the asus is decent clocker but not very cool unless you whack the fans up high
the KFA2 EX OC is a bit random - it's either quiet or a good OC but not both it would seem

in terms of actual benchmark performance, the reference cards are aquiting themselves quite well, though tend to be on the noisier side, but temps don't seem to be running away and might even be good candidates for watercooling (as opposed to paying over the odds for an aftermarket aircooler and then replacing it anyway)

I would love to see ref 670 on water results to verify this

based on a sample of 1 (which is not much to go on) the jetstream seems like a poor choice as it's not particularly cool, or quiet, or good at OC

updated results here;
http://forums.overclockers.co.uk/showpost.php?p=21922576&postcount=2

 

[ingramt]

Make & Model: Gigabyte Windforce
Best Boost clock: 1189Mhz
Temp: 60-65
Noise: Inaudible over case/heatsink
Heaven Score: 1800 - 1900
Heaven Avg. FPS: 73ish

 

[sunshinewelly]

this may seem a crazy question but how are maximum boosts being calculated. I have seen some posters stating they have had boosts of 1350 mhz yet looking at their evga precision screen shots they have increased the overlcock by 153 mhz etc to 1250 and left it at that.

Also with memory what sort of overlclcok should i be setting precision at to get a decent memory OC. I have a windforce and have my core at +153 which is stable, I cant work out how much i should set my memory overclock at.

I see people claiming 7000 on memory but my memory is a lot lower than that ie its around 1500 mhz (surely people are not clocking it by another 5500 mhz)

 

[ingramt]

i have got +675 on my memory, I think you multiply the memory clock by 4 or by 2 depending on which one you read

 

[sunshinewelly]

WHAT DOES INCREASING THE POWER DO IN EVGA PRECISION - DOES IT EFFECT THE VOLTAGE ETC AND WILL IT DAMAGE ANYTHING IF LEFT AT ITS HIGHEST LEVEL IE 111

 

[ingramt]

increasing the power does not touch the voltage it just gives more headroom for the amount of power the card can draw or something like that, the voltages are locked at 1.175, I put it on 111% but i have never seen it above 65ish%

 

[andybird123]

this may seem a crazy question but how are maximum boosts being calculated. I have seen some posters stating they have had boosts of 1350 mhz yet looking at their evga precision screen shots they have increased the overlcock by 153 mhz etc to 1250 and left it at that.

Also with memory what sort of overlclcok should i be setting precision at to get a decent memory OC. I have a windforce and have my core at +153 which is stable, I cant work out how much i should set my memory overclock at.

I see people claiming 7000 on memory but my memory is a lot lower than that ie its around 1500 mhz (surely people are not clocking it by another 5500 mhz)

maximum boost aren't being calculated, they are being read from EVGA PrecisionX (or afterburner, or GPU-Z) - there is a trace that runs that you can select what is displayed - if you run heaven in windowed mode you can have EVGA precision in the foreground and make adjustments and read the live data while heaven is taxing the card, take a look at this screenshot you can see at the bottom and the main window it is reading 1201mhz
1201 at 64C image

memory wise they run default at effective 6000mhz, so if you are reading 1500 default then you mulitply by 4 to get the effective rate (I think in precision X the slider is only doubled, so +600 = +1200 effective or 7200)

as mentioned you also can't do any damage by setting the power target to it's maximum %

 

[Reaper123]

I havent been able to get past +65 clock and +750 on memory as heaven becomes unstable. I tried a more aggressive fan profile with +75 on the core and same memory as before but again heaven crashed at about 12/26. Interestingly enough when i pushed the fans to constant 100% and repeat the test it appeared stable up until 18/26 at which point it crushed. Both the times the crush happened after the gpu reached 64-65 degrees. The next time not only did i NOT increase the voltage but decreased it to -12 instead. Setting the fans to 100% i managed to finish Heaven benchark to get a score of 2310. The funny part is that as soon as i got a glimpse of the score heaven crushed!
This calls for more investigation, results so far are interesting tho

Edit Scratch that score tessellation was on moderate by accident

 

[Nelly]

posted in the wrong thread sorry.

 

[spixelspixel]

higher ambient temps past few days, its 12am and still hot outside

 

[Bradmax57]

Just got my gtx670 windforce x3 today but havent got a clue where to start with the oc'ing, ive got msi afterburner in , and see i from this thread that I should be putting power limit to 111%, but what about the core voltage? also whats a good starting point for this card to be aiming for as far as core and mem clocks go? My ASIC isnt all that great @ 78.4% (no idea if thats good, average bad for a 670)

Any pointers would be appreciated.

Have to say I'm over the moon with the noise levels of the card, i think ive finally got something I can live with

 

[pgi947]

Just got my gtx670 windforce x3 today but havent got a clue where to start with the oc'ing, ive got msi afterburner in , and see i from this thread that I should be putting power limit to 111%, but what about the core voltage? also whats a good starting point for this card to be aiming for as far as core and mem clocks go? My ASIC isnt all that great @ 78.4% (no idea if thats good, average bad for a 670)

Any pointers would be appreciated.

Have to say I'm over the moon with the noise levels of the card, i think ive finally got something I can live with

Set PL too 111% (not that it makes much difference)
Don't touch the voltage, it will natively run at its max of 1.175v
Clock the core first (remember to check your stock boost in something like GPU-Z sensors). Start small-ish maybe 50mhz (+50) then keep nudging it by +10 or so. If you're feeling brave throw in +100 and see what happens.
You're likely to get more headroom on the memory clocks, for those I'd start out at +400 as a minimum.

 

[elmuzzy66.]

My 670 so far does 1260mhz on the core but haven't done any memory oc yet. Its stable for gaming but doesn't like heaven benchmark at high res.

 

[Bradmax57]

Set PL too 111% (not that it makes much difference)
Don't touch the voltage, it will natively run at its max of 1.175v
Clock the core first (remember to check your stock boost in something like GPU-Z sensors). Start small-ish maybe 50mhz (+50) then keep nudging it by +10 or so. If you're feeling brave throw in +100 and see what happens.
You're likely to get more headroom on the memory clocks, for those I'd start out at +400 as a minimum.

Thanks, is afterburner ok is it better to use EVGA precision?

 

[pgi947]

Both work as well as each other, I preferred to use PX 3.0.2, a more user friendly interface

 

[InfernoUk]

hey guys

just got my 670 Asus TOP

Does this look good clock wise for a base?

How far could i OC a TOP card?