AMD Polaris architecture – GCN 4.0

[Davedree]

Andy my card is one of the best clocking 970's, it will do over 1600mhz (20%) for about 20 or 30 minutes and then throttle by over 100mhz.
To take 5 minute benchmark runs at highest possible clocks to imply 25% overclocking an average given is peddling the myth.

But that's his card and that's your card and that's my card.
They all have their own scaling.

And I've said to you before when the gigabyte 970 reaches either it's temp threshold it doesn't downclock by 100mhz, it will downlock a speed bin 13mhz and drop the voltage, until it can then go back up.
Also if you increase the voltage you have to back of the offset frequency at the same time.

 

[andybird123]

I think the point some of the guy trying to explain to you that the cards overclocking potential should compare to the real world performance, not the reference clocks nvidia gave.

If someone hears that maxwells can overcock 25-30% he will assume that adds to the numbers he sees in the reviews. He thinks ref clock result in 100fps, and he will add 30% OC to that. But most reviews doesn't mention the boost clocks of the cards, and as some poited out the cards in reviews usuallu ran at 1300-1350mhz, so when he buys the card and OC it to 1500 he only got around 10% over the FPS numbers seen in the review.
Yes he has 25-30% over the ref clocks, but not compared to real world use.

While on the other hand the Fury runs at 1050mhz in every review, so you if you manage 10% OC you manage it over the performance numbers shown in the review.

That's exactly my point, most game specific benchmark reviews use a reference 980ti, so you CAN add 20-30% to those figures to compare a reference 980ti in the review to a real overclocked 980ti

 

[TheRealDeal]

Here is a pretty good breakdown of what to expect from a reference card and some would say the review cards are usually good chips.

http://www.anandtech.com/show/9306/the-nvidia-geforce-gtx-980-ti-review/17

On average they are getting 20% extra performance from a stock max boost of 1202 to an overclocked max boost of 1477. Good gains but compared to other top end cards of the past nothing out of the ordinary. People get really excited when they see the actual core frequency as it looks more impressive than say a 7950 that launch with 800mhz core and reached 1200 and more in a lot of cases. That's 50% oc and probably around 40% gains. A lot of the gtx680's on release were gaining similar to the gtx980ti as well. Gtx780ti/gtx780 were no slouches either.

The fury X just makes the 980ti look like an overclockers dream in comparison.

 

[humbug]

But that's his card and that's your card and that's my card.
They all have their own scaling.

And I've said to you before when the gigabyte 970 reaches either it's temp threshold it doesn't downclock by 100mhz, it will downlock a speed bin 13mhz and drop the voltage, until it can then go back up.
Also if you increase the voltage you have to back of the offset frequency at the same time.

It's not the temperature of the card that's causing the throttling, it's the TDP limit, as the VRMs heat up it draws more power and drops the mhz while the GPU never reaches 70c

Are you telling me that taken 10 reference 980ti's 8 of them will run 1500mhz @100% load for 3 hours straight and not budge?

 

[andybird123]

It's not the temperature of the card that's causing the throttling, it's the TDP limit, as the VRMs heat up it draws more power and drops the mhz while the GPU never reaches 70c

Are you telling me that taken 10 reference 980ti's 8 of them will run 1500mhz @100% load for 3 hours straight and not budge?

No, because we aren't saying all reference cards will do 1500

Reviewers use reference cards for game reviews, so that's the baseline
What people get on their factory OC cards is 1450-1500, so that's the % addition when working out

 

[Davedree]

It's not the temperature of the card that's causing the throttling, it's the TDP limit, as the VRMs heat up it draws more power and drops the mhz while the GPU never reaches 70c

Are you telling me that taken 10 reference 980ti's 8 of them will run 1500mhz @100% load for 3 hours straight and not budge?

No I'm saying that what you typed below is that the gigabyte 970's don't throttle by 100mhz if they hit tdp limit or heat threshold it's 13mhz steps and a speed bin on the voltage table. If you leave the clock offset at stock and just add 20mv voltage voltage they scale up 13mhz each voltage bin.
I can show you a deliberate throttle on mine if you like?

I know you're comparing ref 980ti's and you could be right they probably won't hold 1500mhz,but they could too, but you need to accept that even the hybrids with ref the 980ti pcb's aree hitting 1450-1500. The problem is the tdp limit is too low on the 980ti ref pcb bios.

Andy my card is one of the best clocking 970's, it will do over 1600mhz (20%) for about 20 or 30 minutes and then throttle by over 100mhz.
To take 5 minute benchmark runs at highest possible clocks to imply 25% overclocking an average given is peddling the myth.

 

[humbug]

No, because we aren't saying all reference cards will do 1500

Reviewers use reference cards for game reviews, so that's the baseline
What people get on their factory OC cards is 1450-1500, so that's the % addition when working out

1200 + 250mhz is 20% with 10 to 15% real world gains, it's as I have been saying about 5 percentage points better than a Fury X, its hardly a landslide is it?

 

[andybird123]

1200 + 250mhz is 20% with 10 to 15% real world gains, it's as I have been saying about 5 percentage points better than a Fury X, its hardly a landslide is it?

because look at the review I posted - 25% OC + 17% memory equalled 36% FPS gain - even on mine on I get a pretty linear % core = % fps

both you and ICDP have said that % core equals a much smaller FPS gain, but that isn't really the case on the 980ti

 

[pete910]

Where's that damn unsubscribe button ....

 

[humbug]

because look at the review I posted - 25% OC + 17% memory equalled 36% FPS gain - even on mine on I get a pretty linear % core = % fps

both you and ICDP have said that % core equals a much smaller FPS gain, but that isn't really the case on the 980ti

Anyone can post a review to suit an argument by claiming it's the be all and end all.

The fact is overclock scaling varies hugely from one game to the next and even from one moment in a game to the next.

What's true for one brand is also true for another if not for the same situation.

BTW as Cat pointed out its 22% not 38, yes that is less than the overclock.

 

[setter]

And I've said to you before when the gigabyte 970 reaches either it's temp threshold it doesn't downclock by 100mhz, it will downlock a speed bin 13mhz and drop the voltage, until it can then go back up.
Also if you increase the voltage you have to back of the offset frequency at the same time.

Non ref 980ti here, msi gaming edition. 13mhz is indeed the drop on it too but it happens at 63c. Stock boost is 1329mhz but it will drop to 1316mhz. Very annoying tbh as with the custom fan profile im using it rarely ventures over 65c.

 

[r22snapper]

3 pages of off-topic tedium about how well nvidia cards overclock. *slow handclap*

 

[andybird123]

Anyone can post a review to suit an argument by claiming it's the be all and end all.

The fact is overclock scaling varies hugely from one game to the next and even from one moment in a game to the next.

What's true for one brand is also true for another if not for the same situation.

BTW as Cat pointed out its 22% not 38, yes that is less than the overclock.

that page cat used was the out of the box performance, I was referencing the 1500mhz OC which was on the page I linked to and showed 102fps vs 139.3fps

if that is 22% then someone needs to go back to maths class

the 22% result is across all games and where the is 0 memory OC and a core clock of 1420, which is an 18% OC from 1200 (or if IDCP is correct and a stock 980ti runs at 1300 is a 22% performance increase from a 9% core OC)

 

[humbug]

I keep mine at a max of 1500 as that's the roundest number it will stick to.
Or sometimes just +100 to make 1454 because I can't be bothered and think maybe it shouldn't be to close to its reality limit all the time for the sake of 1 or 2 FPS.

Andy from your link, actuall gain 11.6:%. Written in black and white. From 125 to 139

 

[andybird123]

I keep mine at a max of 1500 as that's the roundest number it will stick to.
Or sometimes just +100 to make 1454 because I can't be bothered and think maybe it shouldn't be to close to its reality limit all the time for the sake of 1 or 2 FPS.

Andy from your link, actuall gain 11.6:%. Written in black and white. From 125 to 139

Durrrrrrrrrr
That's the gain from overclocking from 1420 to 1500 (6% core OC, 11% fps gain by the way)
We are discussing the gain from reference (1200) to 1500

Ref 980ti 102fps

This is hilarious

Tragic, but hilarious

 

[Geeman1979]

Hilarious being the right word.

 

[Davedree]

I keep mine at a max of 1500 as that's the roundest number it will stick to.
Or sometimes just +100 to make 1454 because I can't be bothered and think maybe it shouldn't be to close to its reality limit all the time for the sake of 1 or 2 FPS.

Andy from your link, actuall gain 11.6:%. Written in black and white. From 125 to 139

If you said manually clock to 1500, rather than incorrectly state it throttles to 1500mhz from 1600, I could have accepted that.
But you are right 970 1500-1600 is rougly.2-4 fps give or take.

 

[Davedree]

3 pages of off-topic tedium about how well nvidia cards overclock. *slow handclap*

Yes but it's in reference to fiji clocking vs maxwell.
Until we see polaris scaling we can't make any claims except maybe polaris is incredibly efficient but at what performance.?

 

[Mauller]

Much off topic in here there is, Nvidia i see. WoW.

On a side note, have people seen the PureHair performance on Pchardwaregaming's review of Rise of the tombraider? only drops the FPS by 1 - 2 frames

 

[humbug]

Durrrrrrrrrr
That's the gain from overclocking from 1420 to 1500
We are discussing the gain from reference (1200) to 1500

Ref 980ti 102fps

This is hilarious

Add a 17% memory overclock on top of that.

You can't state the reference one is 1200mhz as The reference 980ti boost clock is not stated. They vary and it could be almost anything, could be 1000mhz for all we know The only figures they give are for the AIB MSI and that is 6% core + 17% memory with an 11% gain.
Can we get off this now for the sake of our sanity?