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Overclocking of GTX 9xx series

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Not a fan of the flat clocks/disable boost approach - seems it has become a lot of bro science.
I've yet to encounter any noticeable performance loss because the cards were not running flat out all the time. It reeks of that 'parked core' syndrome when people are desperate to improve performance in a piece of software and won't just accept that the software is poorly written, so they start tinkering with things that are not needed and in the end it's all placebo.


I like dynamic live clocks - keeps temperatures down and doesn't waste energy. Meanwhile on any program that requires it, they do use the maximum clocks.

The only time I would support this, is for synthetic testing and you can't have any hiccups as it would affect score. Yet for normal game playing? It's only a problem if it's really a problem - and
you'll know when it is - like a driver bug.

As always with TechPowerUP threads, we need a car analogy :

Synthetic vs real world, is like drag racing at the strip versus drag racing on the street. At the strip every bit of weight counts, every second matters - you're racing for times and slips. On the street, an extra tire in the back, a friend in the passenger seat or an air conditioning unit isn't going to stop you from losing by a fender.
 
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Benchmark Scores Faster than yours... I'd bet on it. :)
Car analogy fail... every bit of weight, AC on/off, counts on both the street and strip (says a 12s 2000 boosted Civic SI I had back in the day that would run .1-.2s slower with the spare tire, backseat and a buddy). :p

I get the rest though.
 
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in the end it's all placebo

I do disable core parking for me and certain people who do audio creation.

What we can do that the newer OS has more crap audio stack than it was in XP and core parking does cause stuters and it is s fact... if you pay for a recording session in a mixing studio you will understand the rage what can cause a borked recording, and you will tell him to do his singing part again and again... and then hear where is my mac pc...

Drag racing is like LN2. We are talking about daily OC. Dynamic clock and power limiters is just a feature to drastically lower RMA ratios. Well I chose to use my gear to max. The power diferences are realy not that big. It just works better at maximum load.
 
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Car analogy fail... every bit of weight, AC on/off, counts on both the street and strip (says a 12s 2000 boosted Civic SI I had back in the day that would run .1-.2s slower with the spare tire, backseat and a buddy). :p

I get the rest though.

I think based on the numbers you just gave, my point stands :)


On a day to day machine, you don't need want to be squeezing every last bit of power, because you're not competing against any thing. It's how we treat CPU overclocks isn't it? 5ghz test, 4.6ghz 24/7 or whatever the numbers are.
Considering that Rez has been discussing power limits, temperature and clock management, I would suspect that going balls out isn't necessarily his main intent.
 
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Benchmark Scores Faster than yours... I'd bet on it. :)
It doesnt... it's a big difference.. could mean winning or losing. Poor analogy. M0ve on. :)
 
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Heck, depending on what you doing depends if you want to push the cards to max all the time or not.

I have yet to BIOS mod my 980Tis, but they will be getting that soon. Plus, after I do the silver pen trick on my spare 970 or 980 (to see what I can make them do), I may turn around and do it on my Tis. Right now jelly of the one peep in the folding area of another forum who got his running 1600MHz while folding. Everybody over there shares BIOS edits to push the cards as far as they can take them. Still need to push my little 960 a bit farther. Nipping at the heels of two 780s who got 1st and 2nd spot in the TC folding teams for nVidia section. So far I am boss with my 960 beating all the other 960s at folding. Just need to push it farther, it currently at 1551MHz on its stock volts.

I'm going to catch those 780s, I want my 1st spot back.

ontheheels.JPG
 
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As it turns out, crashing of NFS 2016 at intro video wasn't caused by bad TDP/power/temp limits. It was god damn MSI Afterburner's OSD that was doing that. Aaaargh.
 
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In the recent events of GTX 1080 being released with 10 GHz GDDR5X I started wondering, how far can I push my VRAM. I've already clocked it to 8 GHz, I wonder how far will it go... Currently set at 8100 MHz for testing. Lets see :)
 
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Hell, I'm gonna try some memory overclocking too. No contest though because I'm going to stop at 24/7 clocks and I have a feeling you're going to go as far as you can, lol.

EDIT: I had to stop at 7.9Ghz for me, but it could go higher perhaps with some insane voltages I am not comfortable with. I'm using Samsung vram, FWIW.
 
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I had the elpida on my 970s running 2201 before I sold them. 8804 effective.
 
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Looks like 8100 MHz is really pushing it since it starts artefacting here and there during stability tests in Unigine Heaven. I'll just leave it at 8000MHz. It has been rock solid so far and high enough. I mean, it's already 1GHz more than stock. Can't complain over that. Core is max at 1443 MHz which is also fine. I'm going to work on power some more. Now that I know 1443 MHz is max for core, I'll try to get voltage way down. Currently I'm testing 1.15V as the upper limit till CLK 63 (which is where my GPU stops) and it's looking promising. 1.15V instead of original 1.281 is quite significant. Now I don't know how high it really went under load since I forgot to check in GPU-Z, but 1.15V seems stable and that's quite nice for the given clock I think. Gotta test some more with 4K DSR to really put some stress on GPU. So I can finally round the entire overclock as a nice all around package of highest possible stable clocks with lowest thermal output. From the looks of it, I'll make it way faster than stock and also cooler at the same time. Currently with 200W TDP and it doesn't seem to trigger the limiter. Yay :D
 
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I had the elpida on my 970s running 2201 before I sold them. 8804 effective.

Strange, Elpida usually clocks lower than Samsung or Hynix. Maybe you got super lucky (or I got super unlucky, lol).
 
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my 970's have Samsung, and they dont go as high as Vellinious' 970's. its not just You R-T-B
 
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my 970's have Samsung, and they dont go as high as Vellinious' 970's. its not just You R-T-B

Sounds like he just got some golden Elpidas then.
 
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Looks like 8100 MHz is really pushing it since it starts artefacting here and there during stability tests in Unigine Heaven. I'll just leave it at 8000MHz. It has been rock solid so far and high enough. I mean, it's already 1GHz more than stock. Can't complain over that. Core is max at 1443 MHz which is also fine. I'm going to work on power some more. Now that I know 1443 MHz is max for core, I'll try to get voltage way down. Currently I'm testing 1.15V as the upper limit till CLK 63 (which is where my GPU stops) and it's looking promising. 1.15V instead of original 1.281 is quite significant. Now I don't know how high it really went under load since I forgot to check in GPU-Z, but 1.15V seems stable and that's quite nice for the given clock I think. Gotta test some more with 4K DSR to really put some stress on GPU. So I can finally round the entire overclock as a nice all around package of highest possible stable clocks with lowest thermal output. From the looks of it, I'll make it way faster than stock and also cooler at the same time. Currently with 200W TDP and it doesn't seem to trigger the limiter. Yay :D

On the stock BIOS I can run my card stable on the memory at 8640 on Heaven. Once I exceed 8640, the performance starts to drop. Games on the other hand don't handle the 8640 speed. I get artifacts or lock ups. I have to lower the memory closer to 8400 to run stable in games. I'm not at home so I don't remember if my card has Samsung or Hynix memory...

Core maxes out for me at 1358. Since I don't need to push the card to it's absolute max for my needs, I just leave the core at 1250 and memory at 7800
 
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The cooler you keep the memory, the higher it'll clock. I had full coverage blocks and ambients between 10c and 12c during my benchmark runs.... Makes a difference.
 
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Still, 8400 MHz on memory is still pretty damn good. Yeah, I've noticed the cooling thing since it only starts artifacting late in the benchmark, but still. Noise is something I'm not willing to compromise just for extra 100MHz of memory.
 
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Still, 8400 MHz on memory is still pretty damn good.

Most certainly is! To be honest, this whole thread is making me feel like my memory is lame when probably it's just average, lol.
 
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Ok, I think my long project of fiddling with GTX 980 is coming to an end. Here's a sitrep:

GPU: 1443 MHz @ 1.15 V (Boosted, so it downclocks for 2D)
VRAM: 8000 MHz (8 GHz)
TDP/PWR: 200W

So, the end result is way faster card than stock while consuming less power, being quieter and delivering higher framerate. All nicely baked into BIOS so I don't have to ever again fiddle with it. Now it'll just have to undergo regular gaming and if there won't be any problems for several weeks of gaming, this is it. Quite happy :)
 
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Ok, I think my long project of fiddling with GTX 980 is coming to an end. Here's a sitrep:

GPU: 1443 MHz @ 1.15 V (Boosted, so it downclocks for 2D)
VRAM: 8000 MHz (8 GHz)
TDP/PWR: 200W

So, the end result is way faster card than stock while consuming less power, being quieter and delivering higher framerate. All nicely baked into BIOS so I don't have to ever again fiddle with it. Now it'll just have to undergo regular gaming and if there won't be any problems for several weeks of gaming, this is it. Quite happy :)

Nice to see you you got things where you want them be. I too O/Ced my 980 SLI setup via BIOS overclocking and TDP. Once stable, its so much better this way.
 

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Balls. It locked up during Natural Selection 2 yesterday. I guess I'll have to do it more gradually from the upper voltage and use higher load for testing to reveal instability faster.
 
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Is there any memory related parameter that would allow better memory overclock? Like memory power limit or something? Like you know, Power Table has no frigging labels, are any of those below Power Limit one related to memory in any way?
 
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No. The type of memory plays into how well it will overclock. Hynix seemed to struggle on Maxwell. Elpida was the "middle grade", and the cards with Samsung memory had the best chance of hitting 2200+. Keeping Elpida REALLY cool was what brought their overclocking potential up. I had mine running 2050 for every day clocks, and 2174 peak for benching. But that was with full coverage blocks and ambient temps around 15c.
 
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I got a bit of an inspiration from R9 Nano and went the opposite direction with my GTX 980. End result? A GTX 980 running same clocks as from factory on GPU, 8 GHz VRAM at TDP of only 150W. It needs a lot more stability testing, but holy crap, it runs at 70°C after several loops of Unigine Valley with drastically lower fan curve as before. So low it's absolutely silent. Now I can't decide between slightly loud 1443 MHz core and max performance or this.
 
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