RX480 8gb NITRO+ OVERCLOCK

[CapsLuke]

hi everyone,
i was trying to overclock my rx 480 8gb sapphire nitro+ OC edition, and i was looking for some useful advices about it.
currently i have pushed the power limit to the maximum available, increased by 12mV core voltage and reached succesfully 1380 mhz (from 1342 factory OC). fans are set to 85%, resulting in 65/67 degrees.
when i try to set it to 1390 mhz, i get wattman crash due to system failure, error already occured when i tryied to increase the core clock without adding mVs. the strange fact is that MSI afterburner is not allowing me to add more mVs to the core clock, while it did allow me this with my previous gtx 960 4gb MSI Tiger OC. memory clock is still untouched.
System specs:
intel core i5-3570K @3.4ghz
AMD Radeon RX 480 Sapphire Nitro+ OC 8GB Edition
16 GB ram DDR3 @1333mhz
psu 600W CoolerMaster (don't remember the product full name).
thanks in advance for your help!

 

[jp95]

if you maxed out the voltage/power slider on MSI after burner and you are getting +12mv and 1380mhz core that means thats all she's got to give.

If you mean you can not adjust the voltage at all in afterburner you have to go into settings and allow over volting.

Tbh 1380 sounds like a reasonable overclock for the rx 480. Id try overclocking the memory.

 

[CapsLuke]

I saw people getting even 1420 mhz oc. I was wondering if i could use trixx instead to get more results.

 

[jp95]

Well, every chip is made different, I dont think using trixx would improve the overclock but you could try.

 

[CapsLuke]

i tried with trixx and it still limits overvoltage to +12 mVs. anyway i managed to get 1395mhz on the core clock and 2070mhz on vram clock. after about 1 hour of benchmarking loop (unigine heaven) and gaming session (assassin's creed syndicate high-ultra mixture with msaa 2x + fxaa) i got one crash but it wasn't wattman stop for system failure but a common appcrash of both the game and amd radeon settings (crimson software). btw no strange pixels on-screen and everything seems fine. actually i think it's not worth it because it gives me just 2 fps more in average; anyway heaven benchmark gave me a score of 1420 from 1335 stock speeds. shall i test this configuration more to find out if the crash is due to too much OC or i can tweak it up to 1400 mhz and test it?

 

[jp95]

I always step down my overclock a bit. for example if you are stable at 1395 i would step down to at least 1385. you wont notice a difference in gaming. I wouldnt bother pushing it any further I dont think you will see any games and runing your gpu at its limits isint the best for it, and it might become unstable in the future due to degredation

 

[CapsLuke]

the fact is that it gave me lower score on 1390 mhz than 1385 mhz, and the 1395mhz setting returned signicantly better score. unigine heaven gave me 1335 at stock speeds, 1390 at 1385mhz, 1384/85 at 1390mhz and 1420 at 1395mhz (test repeated 4 times to be sure). do you think the crash was due to the overclock? because when i got the other crashes it was just like 5 minutes after benchmarking/gaming session with the message "wattman settings have resetted due to system failure", and this time i got two normal appcrash (ACS.exe and amd radeon software has stopped working) after about one hour with active overclock at 1395mhz and 2070mhz...