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post #3061 of 4147
why did you underclock as well?
i overclocked it past 8gb stock (have the 4gb with -45mv in afterburner) haha.

my voltages still spike and vary drastically though. i've seen it go as high as 1100mv but usually hovers around 1080mv though. fan curve hasn't let it surpass 74C, summer time expect 80-85C i'll have to wait and see.
post #3062 of 4147
Well for example my reference card have from stock a voltage in stage 7 of 1.110v with 1266 mhz - And you can work stable with 1320 mhz and 1.130 v it's less than the regular 1.150v but for example to get 1340 mhz (yes 20 mhz) I need to rise the voltage to 1.180 v and for 1350 mhz to 1.19v and in real world with the RX 480, get more core than 1330 mhz don't have a significant performance impact.-
I mean that efford for the video card and heat in the VRM you can win it just with a few overclock in your CPU with less stress.-
About the memory you can get a real 2160 mhz or 2150 mhz that will have a few fps, and it's the regular roof for memory overclock with the Samsung chips.-
post #3063 of 4147
Quote:
Originally Posted by ocyt View Post

why did you underclock as well?
i overclocked it past 8gb stock (have the 4gb with -45mv in afterburner) haha.

my voltages still spike and vary drastically though. i've seen it go as high as 1100mv but usually hovers around 1080mv though. fan curve hasn't let it surpass 74C, summer time expect 80-85C i'll have to wait and see.

I am not underclocking, my cards are 470's, 1215 is their boost clock.
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post #3064 of 4147
I certainly agree about the top end 480's being pretty much at their limits out of the factory.
My Gaming X can barely break 1400MHzz without running into issues, which isnt much beyond the stock 1303MHz value. I was hoping to get this bad boy to 1500+ after seeing what the big reviewers managed, but they certainly received some unicorn cards for testing.
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post #3065 of 4147
Quote:
Originally Posted by GecKoTDF View Post

Well for example my reference card have from stock a voltage in stage 7 of 1.110v with 1266 mhz - And you can work stable with 1320 mhz and 1.130 v it's less than the regular 1.150v but for example to get 1340 mhz (yes 20 mhz) I need to rise the voltage to 1.180 v and for 1350 mhz to 1.19v and in real world with the RX 480, get more core than 1330 mhz don't have a significant performance impact.-
I mean that efford for the video card and heat in the VRM you can win it just with a few overclock in your CPU with less stress.-
About the memory you can get a real 2160 mhz or 2150 mhz that will have a few fps, and it's the regular roof for memory overclock with the Samsung chips.-

good info, thanks. my performace reflects this as well, 2149 (yes for whatever reason i stopped getting errors at 2149 after 2150 was, though i'll have to test it further to be sure)
and 1325 on the core with an undervolt.

but you brought up an interesting point, not exactly diminishing returns, but it gives literally no irl performance increase with the higher clocks.
think it's a driver issue? game devs being lazy? or is it like the 6870 being bios locked at 1ghz coreclock but per game performance being gimped...
i wonder.

Quote:
Originally Posted by Ricwin View Post

I certainly agree about the top end 480's being pretty much at their limits out of the factory.
My Gaming X can barely break 1400MHzz without running into issues, which isnt much beyond the stock 1303MHz value. I was hoping to get this bad boy to 1500+ after seeing what the big reviewers managed, but they certainly received some unicorn cards for testing.

what is your ASIC at?
Quote:
Originally Posted by ronnin426850 View Post

I am not underclocking, my cards are 470's, 1215 is their boost clock.

ah that explains it, sorry for the confusion.
Edited by ocyt - 1/17/17 at 5:52am
post #3066 of 4147
Quote:
Originally Posted by ocyt View Post

good info, thanks. my performace reflects this as well, 2149 (yes for whatever reason i stopped getting errors at 2149 after 2150 was, though i'll have to test it further to be sure)
and 1325 on the core with an undervolt.

but you brought up an interesting point, not exactly diminishing returns, but it gives literally no irl performance increase with the higher clocks.
think it's a driver issue? game devs being lazy? or is it like the 6870 being bios locked at 1ghz coreclock but per game performance being gimped...
i wonder.
what is your ASIC at?
ah that explains it, sorry for the confusion.

Well in all my years of experience, my theory about that, because this happens will all GPUs - AMD and Nvidia - It's when you check the FPS with a stock freq for example 1266 mhz, and then you rise the core to 1330 mhz, you are adding 64 mhz with no voltage or just a bit something like 0.015 v and probably you see a difference of 10 fps and that's very good, you can check benchmarks in the internet between for example Asus Strix with 1310 mhz stock or 1330 mhz in OC mode, and the reference card with 1266 mhz and you will notice a increment of 10 fps.-
But what happens next? and here comes the theory, when you past over the sweet point all the GPU have it, in the RX480 it's 1320/1330 mhz with 1.150v - The performance increase the some proportion with the freq BUT you need to add a lot of voltage and generate a lot of heat, and you start to see the lost of effiency, look my example:

1.100v = 1266 mhz
1.130v = 1320 mhz
1.180v = 1340 mhz
1.190v = 1350 mhz

Like you can see my sweet point it's 1320 mhz - So I have from 1266 mhz to 1320 mhz 54 mhz of dif and something like 10 fps - If I want 10 fps more, I will need another 54 mhz more, will be 1320+54 mhz = 1374 can be 1380 mhz ... I test it and I need = 1.220v

And start to have coil whine and a lot of not ideal situations - In basic you win performance with higher clocks but don't have effiency and start to be not productive.-


The ASIC it's a theory but apply very well, more high asic you can't rise too much voltage, but with less voltage from stock you can rise more higher clocks, low ASIC you can rise more voltage and you can rise more freq too, because it's not sensitive to the change of voltage, but you generate a lot of heat, that because for water cooling it's ideal low ASIC you can send a lot of voltage and control that, for air it's ideal high ASIC quality, less voltage, less heat.-

The ASIC it's directly related to the sweet point - I have a crossfire and one video card have from stock 1.150v (low ASIC) and the other 1.100v (high ASIC) from factory the same reference card.-
The high ASIC video card can just go to 1320 with nothing of voltage, but it's sensitive to add more, to get 1340 mhz I add voltage, all the time, and not win stability need to add a LOT (1.18v).-
The low ASIC video card can go to 1380 mhz and 1.170v every mv I add to the video card improve stability, but generate a lot of heat all the time.-

So my conclusion about the RX480 scale very very well with overclock, but just to 1320/1330 mhz then, it's a silicon lotery and the voltage will be very higher.-
Edited by GecKoTDF - 1/17/17 at 6:19am
post #3067 of 4147
Howdy all...I am finally getting around to serious overclocking of my RX 480 I got as a replacement for a RMA in December. I sent in a Powercolor R9 290 Turboduo (4 gig vram) and they sent me the RX 480 Red Devil ( 8 gig, I think all red devils are 8 gig might be be wrong.)

Like others been having a heck of a time due to the wattman issues and rebooting etc.

Been messing around with the Polaris Bio Editor, Watttool, also Trixx and MSI Afterburner.

I had already flashed the Unlocked PowerColor vbios. I am now using the "Red Mod" for cooling. I used it previously on my R9 290 and 390 gpus so I re-used the same AIO cooler I had laying around. Just for fun I attached one of my fan controller temp monitors to one of the ram chips. My Red mod is using a Coolermaster Siedron something been a few years since I boughts ...well a bit more then a few haha and I have a fan blowing on my VRM controlled via my fan controller.

Idle pics with VRM fan down to silent. I can adjust that speed when needed ie gaming or testing.



This brings me to some questions as I finally ended up using Stilts tool EMBD as I got better results then using Wattman. My Core is currently at 1450 Memory is 2300 with +50 power limit and +100 core voltage. My Idle temps are just a few degrees above ambient. I have pushed the cores higher last night but was using a lot more voltage. Currently my high temps are slightly less then 60 degrees. I am now wondering should I push the even more based on the temps. I have seen and read people using 1.3v and 1.35 volts.

I forgot to mention I did modify the Unlock powercolor bios last night as well. I Turned the fan off since I do not use it. I changed the 2000 memory strap to the 1750 strap and get better results. I am only overclocking it through MSI afterburner right now but I did use Trixx some last night to go over +100 core volts.

Pic after Firestrike run:



So this brings me to my real question...should I just call it a day with the overclock on this GPU? My epeen is big enough.
Edited by mtrai - 1/17/17 at 6:26am
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post #3068 of 4147
yup. that described diminishing returns rather well, but the real question is:
are these cards being locked from potential performance increases?
it wouldn't be the first time. i.e 6870 requiring a new bios to unlock overclocks that can boot past 1ghz+
1400mhz is a significant increase over 1300mhz, but the performance real world is more like 3-5fps which is well within frame readers error range.
post #3069 of 4147
Quote:
Originally Posted by ocyt View Post

yup. that described diminishing returns rather well, but the real question is:
are these cards being locked from potential performance increases?
it wouldn't be the first time. i.e 6870 requiring a new bios to unlock overclocks that can boot past 1ghz+
1400mhz is a significant increase over 1300mhz, but the performance real world is more like 3-5fps which is well within frame readers error range.

I think it's related to shaders, bus width, etc - It's not everything related to clocks.-
post #3070 of 4147
Quote:
Originally Posted by mtrai View Post

Howdy all...I am finally getting around to serious overclocking of my RX 480 I got as a replacement for a RMA in December. I sent in a Powercolor R9 290 Turboduo (4 gig vram) and they sent me the RX 480 Red Devil ( 8 gig, I think all red devils are 8 gig might be be wrong.)

Like others been having a heck of a time due to the wattman issues and rebooting etc.

Been messing around with the Polaris Bio Editor, Watttool, also Trixx and MSI Afterburner.

I had already flashed the Unlocked PowerColor vbios. I am now using the "Red Mod" for cooling. I used it previously on my R9 290 and 390 gpus so I re-used the same AIO cooler I had laying around. Just for fun I attached one of my fan controller temp monitors to one of the ram chips. My Red mod is using a Coolermaster Siedron something been a few years since I boughts ...well a bit more then a few haha and I have a fan blowing on my VRM controlled via my fan controller.

Idle pics with VRM fan down to silent. I can adjust that speed when needed ie gaming or testing.



This brings me to some questions as I finally ended up using Stilts tool EMBD as I got better results then using Wattman. My Core is currently at 1450 Memory is 2300 with +50 power limit and +100 core voltage. My Idle temps are just a few degrees above ambient. I have pushed the cores higher last night but was using a lot more voltage. Currently my high temps are slightly less then 60 degrees. I am now wondering should I push the even more based on the temps. I have seen and read people using 1.3v and 1.35 volts.

I forgot to mention I did modify the Unlock powercolor bios last night as well. I Turned the fan off since I do not use it. I changed the 2000 memory strap to the 1750 strap and get better results. I am only overclocking it through MSI afterburner right now but I did use Trixx some last night to go over +100 core volts.

Pic after Firestrike run:



So this brings me to my real question...should I just call it a day with the overclock on this GPU? My epeen is big enough.

Take in mind the VRM of the Powercolor are very very weak, high power draw can destroy the GPU.-
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