The new RX6600 (tested)

[Lalading]

try sometime without middlepart of oc … vdd mvdd etc.
If i have a new card i didnt have yet, i google and search here in forum to find an oc on the same model memory and better - same model of card i have … then i try. if its not stable i look for others
any time i find a good oc …
for a new card i spend some hours to find a good, stable oc
and every card is different. theres no general way

try core 900 and 950 …if it´s stable look further

there are many problems - hardware, bios, cards etc …

[hyyz17200]

Hi,

I was testing the setting (960 | 640/640/1100 | 950) ended up with the lowest power I’ve had so far. It was 260w on the wall for my complete 4x 6600 platform.

However, testing for hours, I have the same LA problem as yours. Also, I have a message about missing cards.

I thought a reboot would be working to restart the mining. But not. I cannot start mining again after a reboot. To start again, I have back to a previous setting (900 | 620/620/1100 | 950). Which wall power usage is 284w. After the miner starts, I can apply (960 | 640/640/1100 | 950) again to achieve the lower 260w power.

However, after hours the issue of the missing cards may appear again, and watchdog rebooting cannot restart the mining, as I said.

I finally figured out another setting (910 | 700/650/1100 | 950). It’s 268w on the wall and has no issue of rebooting.

I need to test more hours. But it should be stable enough since a rebooting can solve any possible crash.

8w more power usage is the only downside, but it’s still great, isn’t it?

A screenshot here:

(ignore the temps, I currentyl insert the cards directly to the board without any space)

[hyyz17200]

One more thing I found interesting is: the 900mhz core is a changing point.

Any value above 900mhz can result less power but also more unstable. Which very weird.

For example, I cannot run 650mv 650mv for even 905mhz. But 900 is okay, even with 620mv 620mv.

Meanwhile, I tested above, 900 620 620 uses much more power than 960 650 650, even 910 700 650.

[surya12]

Hi same error with me also…updated drivers to latest and no use…

[edwinst31]

remove all overclock settings, and use CC and MC only. don’t use VDD VDDI MVDD first @surya12

[eagleeman]

Yes after having several because with Hynix memory, it’s not great

[superka]

8 hours for now and looks ok:

Any suggestion?

[AndyW]

On Team Black Miner.

[crysis_1830]

stable week. gminer

[starknighttp]

Hey guys, I’m a newbie with mining. I’ve just started mining with my 1st GPU Radeon RX 6600 and still trying to config its OC. Can you give me some advice for what I should do with my current setting? On the worker menu, my rig is also listed having problems but I couldn’t figure out what went wrong. Really appreciate if you can help. Thanks!

[starknighttp]

[Batfink]

Starknighttp, here are some OCs for a RX 6600. These will give around 29MH/s at 36-38w in HiveOS;

You can further tweak the settings and get higher MH/s rates but the power consumption will increase. I have these OCs running on four 6600s without issues.

[AndyW]

Thanks. Have shaved off 6 watts (reported) in Hive.

[Zr7s]

anyone else having issues with their fan speeds on 6600?
Msi 6600, sometimes on restart the fan won’t come on at all.
If I manually set fan it’ll turn on and temp will come down, but then I delete the setting back out and it’s like it defaults to 80% fan speed?
I’m not using autofan currently
Thanks!

[starknighttp]

I tried to change to change OC this way but my it became unstable

[fourier]

Hey man, how has this been working out ever since applying the settings in your screenshot? Any crashes or otherwise? I’m also running a Sapphire 6600, but literally just added it 20 minutes ago with the following settings using the latest NBMiner/latest release (0.6-212@211125). No problems so far, but it seems like your settings may yield better economy and hashrate:

[hyyz17200]

Hi

The setting I posted is able to start the miner after a rebooting. It’s not rock soild after days, I still have some reboots, but the rig can recover itself with watchdog. You may try my setting for a test.

I finally tweaked with (905 | 700/700/1100 | 950). This one is a solid setting for keeping running for days. If you don’t mind spend a bit more power it’s worth a try. The power is still less than (900 | 620/620/1100 | 950).

[newwes]

Does anybody have Gigabyte Radeon RX 6600 Eagle?
With any setting I am at max 27.5MH / s or unstable.

[fourier]

Thank you! I’m giving your latest setting a go as I was running into issues with my card dropping offline and/or hashrate watchdog restarting the miner at least once a day. So far, so good and I’m even running at slightly lower power without losing hashrate.

[fourier]

@newwes This setting from @hyyz17200 seems to be working pretty well for me: 905 | 700/700/1100 | 950. Have you already tried it?