Quote from: naimc3243 on December 08, 2016, 02:25:04 AM

Seeking to improve Rx 480 performance.

- SAPPHIRE NITRO+ (100406NT+4GOCL) RX 480 4GB model with V9 runs at 220 H/s at factory core 1306 / mem 1750 ( I think I can do better )

I tried pushing the mem over 2000 to duplicate other settings I saw posted on this thread but the PC crashed.
Card was headless so I plugged a monitor to it, same speed. (ULPS is disabled for the card)

I have a Sapphire Fury running on same PC at 330 H/s using V9.

I see lots of references to bios mod's is the outcome the same as manually setting the Core and memory clocks in trixx or msi afterburner ?

Also I recall back in the day of Silt bios modes AMD was using signed bios's so it was reported to be impossible to modify bios without have a certificate to re-sign the bios file. Did AMD that drop that requirement ?

I think I found my I can't get better performance for this card (ref http://www.legitreviews.com/sapphire-nitro-radeon-rx-480-4gb-video-card-review_184553/10)

"This overclock meant that we were running at up to 1370 MHz at time and the memory was running at 1900 MHz (7600 MHz effective) on the 4GB of GDDR5 memory. Not the highest overclock in the world, but you have to keep in mind the reference cards boost speed is 1266MHz and the Nitro RX 480 4GB cards are the fallout from the binning process done by Sapphire as the best chips become higher clocked Nitro RX 480 8GB cards.

We could not get 8000MHz effective clock speeds on the memory and Sapphire confirmed that the Radeon RX 480 4GB comes with slower Hynix GDDR5 memory chips and that hitting 8GHz would be unlikely. If we went much over 1900MHz the system would hard lock. If we overclocked much higher on the core the system would also lock up. We were able to get some games to run at 1385MHz with stability, but others would crash. At 1370MHz on the core we played a handful of games and they all were stable with this particular card"