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Polaris Bios Editing ( RX5xx / RX4xx ) - Page 134

post #1331 of 3309
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Silent Killer
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post #1332 of 3309
Nope, those are supposed to officially be 512MB modules (4 Gbit).
https://www.skhynix.com/products.view.do?vseq=953&cseq=81
post #1333 of 3309
Quote:
Originally Posted by SSBrain View Post

Nope, those are supposed to officially be 512MB modules (4 Gbit).
https://www.skhynix.com/products.view.do?vseq=953&cseq=81

i see,.....
now i found that my rx 480 started artifact and crashed in Witcher 3. but not in Assasins Creed Syndicate
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post #1334 of 3309
Try opening multiple instances of Unigine Valley/Heaven at 2560x1600 8xAA in windowed mode. You'll quickly find out if in this new configuration you will start observing artifacts and eventually your card crashing.
post #1335 of 3309
Thread Starter 
Stock 2000Mhz Strap = ~49fps
My mixed strap = ~53fps
+9% bandwidth = +8% fps
(The Witcher 3 Blood&Wine)
post #1336 of 3309
So.. Is anybody even still developing tools?
Because after a hour wandering across the whole history of them.. I get this sorrow knowing that people are continuously wasting their time to reinvent the wheel.

Both developers and users. This year seems like the duty to keep it spinning is up to us.
post #1337 of 3309
Not sure if this is the right place to post this, but I am hoping someone here may be able to assist. I have a XFX 480 8GB GTR Black Edition.video card and am experiencing strange things with it that are driving me crazy, i have literally spent 20+ hours working specifically with this one card flashing its bios and trying different settings to no avail. I have two RS versions that i have successfully flashed the bios and overclocked to suit my needs.

It seems like the card cannot be overclocked, i can adjust the memory and core as far as i want and there is no increase in the application speed. GPU-z will show more or less watts used and reflect the new clock speeds, but they are never reflected in the application speeds. The card never crashes or freezes no matter what settings i use or how high i turn the clocks. If i flash the bios to use higher settings by default i continually get slow memory errors in HWinfo64 and faster speeds in the application, but the memory and core after adjusting in wattman or afterburner don't actually have an impact in the application speed and never crash no matter how high i set them.

To me it seems like the card is locked, but if i turn the Core clock down all the way to 665 and memory down to 1000 i see maybe a 25 percent speed reduction in the application. No matter how high i turn the core clock and memory clock up i never see an increase in speed. Does anyone have any ideas as to what this issue could be?

Thank you for any help you can provide.
post #1338 of 3309
Quote:
Originally Posted by generaleramon View Post

Stock 2000Mhz Strap = ~49fps
My mixed strap = ~53fps
+9% bandwidth = +8% fps
(The Witcher 3 Blood&Wine)
I tested out your mixed timings, the last ones you posted in this thread, last night. Without going into numbers, your mixed timings + 2125MHz are basically equal to 2250-2300MHz on stock timings, with the added bonus of no* memory errors, while at the upper end of VRAM overclock I was getting tens of thousands of errors. Going further than 2175MHz (33 errors max per Valley run) with your mixed timings starts to artifact heavily and eventually crashes the driver. 2250MHz is instant crash. There's no gradual increase in error rate, as it is with stock timings. If you overclock too far it just hits a wall.

*I mean, probably no errors. I got single digit errors at 2150MHz, none at 2125MHz, but I've only had one evening of testing, and that was only with Valley and Witcher 3, so probably not very stressful tests
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post #1339 of 3309
Thread Starter 
Quote:
Originally Posted by Loladinas View Post

I tested out your mixed timings, the last ones you posted in this thread, last night. Without going into numbers, your mixed timings + 2125MHz are basically equal to 2250-2300MHz on stock timings, with the added bonus of no* memory errors, while at the upper end of VRAM overclock I was getting tens of thousands of errors. Going further than 2175MHz (33 errors max per Valley run) with your mixed timings starts to artifact heavily and eventually crashes the driver. 2250MHz is instant crash. There's no gradual increase in error rate, as it is with stock timings. If you overclock too far it just hits a wall.

*I mean, probably no errors. I got single digit errors at 2150MHz, none at 2125MHz, but I've only had one evening of testing, and that was only with Valley and Witcher 3, so probably not very stressful tests
I think the rx480 has a weak memory controller(gradual increase in errors you see @stock). As you can see memory can do 2000+ mhz with VERY tight timings, but with the stock ones errors start to appear @2150-2175(my card at least), adding volts to the imc does not help. With my timings you gain 5gb/s every 25mhz. I can do 240GB/s @2125mhz but errors start to appear(1000mv imc) i have to test it @1025-1050mv to see if it's any better.

Anyway, yes you have the same performance of a 2250mhz overclock but with a frequency that the imc can support and using low voltage (testing 925mv).
post #1340 of 3309
Quote:
Originally Posted by generaleramon View Post

I think the rx480 has a weak memory controller(gradual increase in errors you see @stock). As you can see memory can do 2000+ mhz with VERY tight timings, but with the stock ones errors start to appear @2150-2175(my card at least), adding volts to the imc does not help. With my timings you gain 5gb/s every 25mhz. I can do 240GB/s @2125mhz but errors start to appear(1000mv imc) i have to test it @1025-1050mv to see if it's any better.

Anyway, yes you have the same performance of a 2250mhz overclock but with a frequency that the imc can support and using low voltage (testing 925mv).
I think it's both the IMC and VRAM chips, as I have seen improvements after improving cooling on both. Previously I was unable to clock the memory (with stock timings, obviously) past 2200MHz, and even then it needed 5-8C air going into it and 2500RPM fans. After applying a heatsink I can do 2250MHz (with errors, but it doesn't crash), with fans spinning at about 1000RPM and a more reasonable air temp of 18C. And error rate at lower frequencies has decreased.

I haven't noticed any benefits of increasing IMC voltage either.
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