Topic: [XMR] RX 480 Overclock settings / Hashrates. Collaboration of information - page 2. (Read 35354 times)

I really can't do anything but stock BIOS and settings or windos crashed. I read somewhere that windows 7 Is more stable for rx480... Gona try that

Negative.

(Sapphire) RX480 Nitro+ 4GB. Stable.

When I just run with stock BIOS and I undervolt the ccvd with just 50 MV my windows crashed because of AMD driver...

That is for Rx 480 nitro 8gb? Stable?

-cclock 1200
-mclock 2000
-mvddc 990
-cvddc 990
-powlim 0
-tt 62

gives me stability without pushing any temps too high or hindering performance of other third party apps (browsing, whatever).

max I can get mclock up to is 2100 w/ -mvddc @ 1020

edit: produces an average of 300 Sol/s (Claymore's latest release)

Yes stock BIOS and stock setting run stable.
Stock setting :
CClock 1340 mclock 2000  cvddc 1150 an mvddc 1000

That runs stable. As soon as I higher Mem to 2100 it crashes over a couple of hours mining. If I can not overclock, I really should be able to reduce the power. Otherwise this was a bad investment. I have 4 cards now but I already ordered 12 more. But I ordered ASRock h81 pro btc motherboard as well, maybe that will be better?

I've had poor results with overclocking the 4 GB Sapphire Nitro+ 480s. I believe they have slower RAM than the 8 GB version though. Is it stock 2000 Mhz on the 8 GB version ?
I don't think you will be able to overclock to 2100 - maybe try stock setting and see if it is more stable.

I would try a slower GPU clock setting and lower GPU and RAM voltage - I think I had mine running at:

-cclock 1150 -mclock 1850 -mvddc 950 -cvddc 950

Try yours at -mclock 2000 and work from there.

I am currently mining ZCash. Just wondering, once I have overclocked to a speed that is stable, is it possible to flash it in the bios so that the settings are permanent rather than needing to manually adjust it everytime I reboot esp. on a multiple GPU rig?

I also noticed that when I modified the timing on the Sapphire RX480 OC 8GB version, it is recognized in Windows 10 but it comes up as a (!) and a driver can't seem to be installed. Any ideas ?

ok i think this is the topic i was looking for .
I have 4 RX 480 nitro+ 8gb , an old mobo with 4 pci slots , 4 pci risers and 1200w corsair 1200i PSU. i am already trying to mod bios for a week now , modding itself is easy but getting the rig rock stable does not work for me ...

my resultas so far :

started out with base bios and base settings , so i get 640 hash per card so 2550 all together , runs stable for 15 hours ( did not test it longer but it looks really stable ).
then i tried 1500 straps , 1625 straps and last 1750 straps ( seem to be the best for rx480 with samsung memory ). But when was mining with all of these straps in all 4 cards
with basic settings , the rig does only run for a couple of hours. with the 1750 straps and basic settings it run for about 8 hours and crashed then. So for me its hard to believe
that people run theste rigs with 1750 straps on the same cards like i have AND also undervolt the hole thing... it would be nice though if somebody could tell me what i am doing wrong.
i ordered 12 more rx 480 and also some Pro btc 2.0 motherboards , so i can have 6 cards on 1 mobo instead off 4. and hopefulle the mobo makes my rig a bit more stable but i dont think it has someting to do with
stability.

So to make things short
- running base bios and base settings ==> rock stable
- running 1750 timings in new bios and basic settings ==> 8 hours stable max !

- now i am running base bios and changed on 1 card the memory from 2000 to 2100 , running stable for 4 hours now and when its stable for 12 hours , i will apply same setting to seconds card , and so on , so on ...

i will keep u guys posted about my progress.

in the mean time , it would be nice to get some ideas of what i am doing wrong or why is it unstable with 1750 timings and base settings? should i make a script that restarts the miner every 3 hours? like this it can maybe mine stable with high hashrate and low power consumption and not crash the whole rig ...

1. How many 480's are you working with and which versions?

-10 RX 480. All 8GB Versions. 6 XFX, 4 MSI

2. How stable are your mining rigs?
      How often do they fall over or do you pre-emptively restart them?

-Always stable, never restart, never freeze. This is for both machines.

3. Best and worst hash rate on the machine?

I feel this question should just be your hash rate, I'm not going to guess what the pool is telling me because it fluctuates constantly.

-XFX: 3828h/s. MSI: 2552h/s

4. What is your Power Draw from the wall?

-XFX: ~900  MSI: ~650

5. What is your priority? Power usage? Hash rates? Stability?

-See 3

6. How do you apply your *clocks (with the program / Wattman / Afterburner)?

-Afterburner

7. What are your *clocks? (Core Voltage (mV), Power Limit (%), Core Clock (MHz), Memory Clock (MHz))

-Stock everything except for XFX undervolt at -72, MSI undervolt at -98. If I try to overclock anything both rigs will freeze and crash.

Friend wanted a doubt his would be profitable 5 rx 460 shaphire nitro 4 giga for mining xmr or eth?

same cards, with your settings one card crashes after ~2 hours and freeze all system (but I was getting about 1500 h/s)

now I'm using wattman
2x 480 8GB Sapphire Nitro+
core 1340, 1110
memory 2175, 1000

about 310-320W from wall

Claymore v 9.7

Hi,
Have you try sgminer-gm with this parameter on your rx 480 : -w 4 -g 2 --rawintensity 508

Can you say me if you have better result like 780 - 800 h/s.

Thanks.

I can confirm that RX 480 8GB Sapphire Nitro+ does get around 750H/s (with Claymore's 751H/s, with Wolf's 760H/s 1-2% of shares are invalid though with this one). I have the core at 1370Mhz and memory at 2250Mhz, only overvolt needed was 19mV for the clock (the clock isn't really necessary, you can get 730-740 just with memory at 2250 and no overvolt). Consumption on one card is around 120W.

The core overclock is stable with Monero mining, benchmarks and so on but it isn't stable when mining Zcash (crashes randomly), you have to add more mV for stability.

In my opinion, using Wattman and no BIOS flash pretty much insures that you'll keep your warranty. The Wattman overclocking software basically overclocks the card at Windows start-up, it has certain limits and it won't be easy to fry the card butif it gets bricked they won't really be able to tell if it was overclocked like that (not 100% sure about this though).

I've achieved this speed using a rig with xfx rx480 8g reference gpus where from I've copied the 1750 strap into the 2000 strap. And set core/Mem to 1250/2235 with the config of the mining software.

Mining software used is: ethOS (version 1.1.8 ) with the miner set to sgminer-gm-xmr.

Hope this helps you..