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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 189

post #1881 of 3378
@nolive721 Sure right on man so if u wanted u could do 1407mhz on stock voltage no "offset" or whatever you guys call it... maybe since someone said to run the card at less voltage is good for the long run idk...

1407mhz at 1250mv is stable and 2110mhz... You can undervolt at 1080p or some nano baby resolution like that... But at 5120x2880 you can't have an "Under-Volt" you need all the power you can get.

Throw your undervolt under 5120x2880 and see what happens...

Anyway right on man we could do some stuff to your bios but really its up to you to set it as you wish and if it's good for you that's all that matters thumb.gif
post #1882 of 3378
thanks

I should have explained that I am hitting a wall trying to go beyond my current OC (1450Mhz core and 9000Mhz memory), whatever the additional core voltage I set so I was considering the memory timings to get the very final bit the card is capable of performance wise.
but the OP dont list my card in the RX480 performance timings and I am not yet comfortable to do it myself in the BIOS,I confess

and the voltage thing is surprising me because you can see in HWinfor snapshot that max VDDC is around 1.23V which doesnt seem that high to me but the card again wont let me add mor juice, for a reason I dont get (BIOS related,hardware limits?)

I am also concerned,maybe wrongly, that these modified timings will affect, read increased the card temps under load with this severe OCing as I call it, where I am already hitting 80degC

with my undervolt set, bare in mind I am running a triple 1080p monitor set-up so I understand the limits there with teh amount of pixels the crad has to run, I dont promise myself the moon, this card set-up will remain for non graphically demanding games only

voila I hope it explains better what I have tried so far and what I am trying to achieve

any help appreciated

Olivier
post #1883 of 3378
Right on yeah we all want more clocks but that won't happen until Polaris uses static 1000mv usVDDCoffset. Which it is now 900mv. With that 100mv extra usVDDCoffset. Were looking at 1600Mhz on stock voltage which would be now 1.350mv/ 1000mv usVddcOffset.

Knowing this, with 1000mv usVddcOffset this card is capable of 2Ghz! 64 Billion Pixel's & 288 Billion Texel's... thumb.gif
post #1884 of 3378





Hi,
i need help to mod my sapphire nitro rx 480 0c 4gb. as i can see it come with elpida rom. when load to PolarisBiosEditor 1.4.1 nothing at timing value box, please help me. bios.zip 109k .zip file
post #1885 of 3378
I know from the thousands of Polaris BIOS I flashed, timings other than stock is not stable. Maybe a frame or two just maybe but not worth it...

Focus on temperatures of core and vrm and get the clock as high as possible... want help?
post #1886 of 3378
Quote:
Originally Posted by chris89 View Post

I know from the thousands of Polaris BIOS I flashed, timings other than stock is not stable. Maybe a frame or two just maybe but not worth it...

Focus on temperatures of core and vrm and get the clock as high as possible... want help?

@bery89

I can't confirm this, timings available on first post of this thread are as stable as stock ones. Especially Uber V2.1 of course for Samsung mems. I use them and can't complain for stabilty. Replacing timings may be very useful if your mems dont like to overclock.

VRM temp isn't crucial, stay below 115 C degrees and you will be fine. Core temp is very vital, lower temps may extend overclocking stabilty.
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Little facker
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post #1887 of 3378
thanks for your reply, i wish if can change timing value in bios,
post #1888 of 3378
I've been fiddling with settings since I went back to 17.3.3 which OSD is working on. Performance isn't way up there but at least 5120x2880 is working. I think 4096x2160 runs a lot better, as anyone would expect.

It needs a ton of power for 5k. I hit a peak of 250 watts and was throttling a lot down to 65287 at 933Mhz from 45 to 25 off and on. I'm new to fiddling since I know everyones game is different so the card will behave differently in different apps.

I guess now we should find out what's the max possible clock for 65285, 65286, 65287. So when it does throttle, performance is still way up there. Rather than half the fps between hops ie 933Mhz to 1407Mhz for me.

This is what I'm testing now... trying to get a fine mix of performance/ noise/ heat config rollin'.

PS - I think the fan needs to be of higher diameter to hold big clocks... Same shroud width with 92mm fan with 4x more dense fins so it not only can move more air at less rpm and db noise. Yet also move more cfm with more fins than with less... Also curved scooped fins to scoop the air can aid noise/ cfm. A slight angle of 87 to 80 degrees to the scooped fin in the direction of into the cooler since a 90 degree fin angle would allow air to escape out of the cooler. Reducing fan efficiency.


Edited by chris89 - 4/9/17 at 1:09pm
post #1889 of 3378
Despite in the initial post made and test with memory timings, i am really curious how much the memory timings affect the gaming performance on a memory consumption games as Battlefield 1 ? My memory is not a good overclock and reaches around 2050mhz with 1725 strap with no errors, but i can`t go higher and think to try some more aggressive timings and their gaming performance impact.


Tested timings on stock 2000mhz / 1000mv.

Uber-Extreme 2.1 gives thousands of EDC Errors

Uber-Light - no EDC Errors. Haven`t measured if there is any gaming performance improvement.

I optimized my card by undervolting and achieved the following results:

1) Stock 1305/2000 - 50mv on core , lower temps and about ~30W less power draw.
2) 1340/2000 - 30mv on Core with lower VGA temperatures. Best performance/efficiency mode.
- Max Core Temp - 70
- Max VRM Temp - 90

3) 1360/2000 - 0mv and requires stock voltage for 20mhz more core power.
4) 1380+ /2000 +20-30mv on Core and much higher temps.

-50mv about 25W less Power Draw.
-100mv about 50W less Power Draw.
- etc.
Edited by ziXs - 4/9/17 at 1:31pm
post #1890 of 3378
You would be surprised at the consistency of frame rate when clocked lower, call it 1000Mhz... with 88C/ 96W limits. Try it? I saw almost a 1/2 power consumption reduction with smooth gameplay and far cooler only 65C core 65C vrm zero throttling on 2933rpm... thumb.gif
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