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post #6841 of 11440
Okay I've had coffee now.

So what all might this prove. well I think that the high rate video (120 fps) is capturing and amplifying the slight variations (uneven frame times) in gameplay video. So yea I think your game play is hitching or stuttering.
post #6842 of 11440
Tom's Hardware has an article on undervolting R9 Fury.

http://www.tomshardware.com/reviews/msi-afterburner-undervolt-radeon-r9-fury,4425.html

This caught my eye:

Note: Every GPU is unique. This means that the lowest number at which a processor still functions without errors can be different from one to the next. What's more, errors don't always become apparent immediately. All of a graphics card's features need to be used for a prolonged period of time to determine if the configuration is stable.

Cards made during AMD's early production cycle are particularly prone to display problems after undervolting. These GPUs were only made into Furies by a somewhat adventurous unlocking process. The newer ones are a lot easier to undervolt. However, even with these, your mileage will vary.

I'm thinking out loud here.

High frame rate usually require high current use. How gentle is the cut-off point of the power delivery circuit on Fury family?

Wow good read. more questions than answers though.

1) Do fury chips that don't overclock well, under-volt well.
2) Do the attempts at hot moding the voltage regulator bridge circuit require an equal increases in resistance to balanceout; the voltage drop (in the other half of the bridge circuit), this in order to maintain current flow (sensitivity) to prevent clipping and voltage regulation noise (clipping).
3) does this mean that the Nano may be better overclocking chips, because newer and more stable. This unfortunately coupled with a less powerful voltage delivery system.

remember I'm just thinking out loud.
Edited by bluezone - 2/8/16 at 1:28pm
post #6843 of 11440
They (and everyone else) should test UVing with r9 nano

Undervolting is the best way to overclock the nano Because it always power throttles

so when U undervolt it , the chip uses less power than stock voltage for same frequency
So it doesnt throttle as much as before

I personaly tested this with my r9 290 @-30% power limit

With stock voltage it was running @780-850mHz

But with -100 it was running at a rock-solid 947mhz
post #6844 of 11440
Quote:
Originally Posted by tysonischarles View Post

Well if you ready a bit further back, the HBM has set clock speeds. 500/545/600/666.

I'd be happy with what you have as its most likely actually at 545. And from my testing anything above causes me a lot of problems. I'd try work up the GPU clock speed. Go back like two pages and reac the link, it makes more sense than me

I have my memory at 550. Should I set it to 545 instead? What actually happens when I set it to 550?
post #6845 of 11440
Quote:
Originally Posted by Crisium View Post


I have my memory at 550. Should I set it to 545 instead? What actually happens when I set it to 550?

It shouldn't make a difference whether you set it to 550, or 545. At 550, it's clocking down to 545. At 573 it should start clocking up to 600.

     
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post #6846 of 11440
I actually don't at what point it goes up or down to whatever step. So I can't actually answer the question
    
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post #6847 of 11440

It works at the increments of 500-545-600-666.66MHz, rounding to the step nearest your current clockspeed.

Quote:
Originally Posted by Radox-0 View Post


Checking the rules, seems fine. Got the info from here: https://forums.overclockers.co.uk/showthread.php?t=18678073&page=233

Page 233 post # 6977 by AMD Representative


 

Quote: AMDMatt's post @ overclockers.co.uk

"Nice one Kaap. Here's a fun fact for all your Fiji overclockers. 

Fiji’s MCLK overdrives in discrete steps, so while various overclocking tools are increasing in 5Mhz steps the MCLK is actually only able to support 500.00/545.45/600.00/666.66MHz and right now it just rounds to the nearest step. If you are intending to overclock HBM on Fiji, then 545Mhz works well on all four of my Fury X cards. 600MHZ proved a step too far on each card and resulted in instability.

So for all those people setting their MCLK at 570Mhz, it's actually running at 545Mhz."

 


Anecdotally, Fiji does not care for insta-boosting memory clockspeed, at least on my cards. I've had success running up to 545, running a Fire Strike or Catzilla, letting it sit for a moment, and then attempting another run at 600.

     
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post #6848 of 11440
What voltage bump are you guys running for 1100mhz core?

I thought I had it stable at 1100/550 @ +18mV (+50% power), it survived BF4 and 3Dmark... but crashed very quickly in Pcars.

I bumped to +36mV and now Pcars is stable... but is +36mV a lot for 1100mhz?
post #6849 of 11440
Quote:
Originally Posted by 98uk View Post

What voltage bump are you guys running for 1100mhz core?

I thought I had it stable at 1100/550 @ +18mV (+50% power), it survived BF4 and 3Dmark... but crashed very quickly in Pcars.

I bumped to +36mV and now Pcars is stable... but is +36mV a lot for 1100mhz?

From my experince, you can throw as much power at it as you want.. my problem is the VRM overheating.. the core is fine. Im gonna replace the TIM on my Asus R9 Fury Strix and that it will lover the temps of the VRM. People have reportet massive temp drops of the core also from doing this. +10 degrees.-
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post #6850 of 11440
Quote:
Originally Posted by 98uk View Post

What voltage bump are you guys running for 1100mhz core?

I thought I had it stable at 1100/550 @ +18mV (+50% power), it survived BF4 and 3Dmark... but crashed very quickly in Pcars.

I bumped to +36mV and now Pcars is stable... but is +36mV a lot for 1100mhz?

Which card? Fury? I have my Nano set to 1100/545 @+12mv stable on Firestrike, Unigine, and all games.
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