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[Official] NVIDIA GTX 970 Owner's Club - Page 1930

post #19291 of 26263
Quote:
Originally Posted by Xeno1 View Post

I just tried a Bios with voltage at 1.286. Neither Gpu-z or AB report anything higher than 1.275. The next step would be to try what you did, just to see if I get any higher scores. But at this point, I am pretty sure 1.275 is the limit for the 3975. Evga told me that there was a voltage limit but they would not disclose what it was.

They won't report any higher no matter what you do. The max they'll read is 1.275v.
post #19292 of 26263
Quote:
Originally Posted by gatygun View Post

970 sli will only pull about 450 max together, a overclocked cpu will pull about ~150.

650 wattage psu is already enough for mild overclock, 750 works for overclocking.

1000w is overkill for 2x 970's.

Anyway, i don't see much reason to OC 2x 970's that much anyway. The performance on 1080p is going to be insane already. higher resolutions you will hit a v-ram wall before anything else anyway.

But that's just me. You are better off then buying a faster gpu with more memory like 980 ti then.

I guess you missed my other post where I showed, very clearly, getting a PWR perf cap with the power limit set to 283 (270 * 105%).

lol, and yes, you're entitled to your opinion about overclocking, but...I've already dismissed it. Have a good day. = )
post #19293 of 26263
Quote:
Originally Posted by Xeno1 View Post

Well when u have your Bios set to 300 and you run 2 of them, and your CPu is 5 Gen old and useing 125+ plus at full load- 750 is not giving much headroom

Yeah, just looked at my numbers and you're right. I'm only running a power limit of 204w on my SLI 970s, so my cpu OC must be getting close to 180W to get me up to the 600W from the PSU. So, if your running closer to 300W on your GPUs, then you probably do need a 850W PSU minimum.
post #19294 of 26263
Quote:
Originally Posted by DeathAngel74 View Post

Progress!!!


http://www.3dmark.com/3dm/8952135? Warning: Spoiler! (Click to show)
^^^^^
Essentially, tricking the card to boost higher, even though its hitting a power cap, lowering tdp,pl,pt to 220W-255W (93% PL in Afterburner). I also lowered the fan speeds, when it hit 100%, instant throttle, no matter what I did. Thanks for all the help guys, I think Im onto something.

Edit:
Yeah, it was only dipping to 1493-1506 this time around!! barely noticeable on the graph. Yay!

Edited by DeathAngel74 - 10/18/15 at 10:49am
     
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post #19295 of 26263
Gettin a little better.
post #19296 of 26263

HEEHEEHEE! Kinda hilarious I was going the wrong way all this time. Less power is better and 1.2750 instead of 1.3125. Like my wife says, "You always have to learn the hard way"
Edited by DeathAngel74 - 10/18/15 at 10:56am
     
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post #19297 of 26263
.[/quote]
Quote:
Originally Posted by Vellinious View Post

They won't report any higher no matter what you do. The max they'll read is 1.275v.
Interesting
Edited by Xeno1 - 10/18/15 at 11:15am
post #19298 of 26263
I have two Strix 970 GTXs. This is what I have hit. I think the cards will go higher also. This test was 40 mins of heaven in a
20c ambient temp room. I wonder what the 1 8pin is pushing through it's cable lol.


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post #19299 of 26263
yeah at 5 Ghz thats a ton of juice. One of these days I have to get a killawatt
post #19300 of 26263
Quote:
Originally Posted by Vellinious View Post

I guess you missed my other post where I showed, very clearly, getting a PWR perf cap with the power limit set to 283 (270 * 105%).

lol, and yes, you're entitled to your opinion about overclocking, but...I've already dismissed it. Have a good day. = )

Just bought a meter, to see how it goes.

PC setup is:
i7 870 4,3ghz 1,45v comsumes a lot
970 1500/2000 ( +85mv / 110power limit )
8gb ddr3
4x hdd's, 1x ssd
8 fans
Random stuff connected towards my pc / usb stick / headphone / mobile phone / 3 screens connected / mouse / keyboard and some more stuff

This is what i get on average when i game ( ac unity market / witcher 3 market / crysis 3 / farcry 4 start area / battlefield 4 mp map / some other games.



Sometimes it hits as high as 400w but that's about it.

I get about 500w at torture tests ( prime95 + furmark )

I get about 320w at prime95 only
i get about 330w at furmark only

The cpu i'm using and the voltage pretty much + clock, extremely demanding cpu that most people that own a newer intel probably won't need to power.



that leaves a 750w with 350 left ( if you got a power hungry cpu ), skylake is pretty much half this ). That 350w isn't going to need to power another entire system + cpu but just a single gpu.

I wouldn't be shocked if 2x 970's would work on a 650w power supply on top of it and that's with a oc.

I have experience with 290's and with a 970, and frankly oc'ing options on those 970's is really minor stuff when it comes to extra watt usage. It's way more limited then what 290's for example offer. The increase in watt consumption from stock to oc is about 40-50w extra. That's it, it's nothing.
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