Looking to optimize my Bitaxe Supra. I see that the Noctua NF-A4x20 5V PWM fan would be a good upgrade. Anyone has experience with it? I read that it might not be the best for overclocking. Is there another fan that’s better? Or the noctua is what’s best? #asknostr
Discussion
I only use noctua fans. but that’s also cause I prefer ninja level silence. also I only have gammas so I’m not gonna be a huge help here
Is it the same model that you’re using? The fan I mean
yep exactly, four-pin
Did you need extra parts to install or the stock fan is four-pin as well?
Nevermind just looked at the Supra 🤣 The fan is four-pin. Thanks!
no extra parts.. in fact, you can take the stock fan and keep it plugged in where it is and move it to the back to lower the vr temp for even more overclocking, then have the noctua fan in the front position cooling the asic chip, that’s what I do with my gamma(s). though I’m not sure if the supra has an additional port for a fan 🤔
I only see one port on mine
yea I think maybe only the gamma has this.. got my stock fan plugged in on the left, noctua fan plugged in on the right
Yeah definitely just one on mine
at least you can get a whisper quiet ninja noctua fan in that spot
OH and almost forgot, they also come with Y splitters in the box usually. you can connect them both in there, just might be a little messy for cable management
That’s what I’m thinking. Ninja quiet fan. I ordered one
I'm getting a consistent .75 with a slight overclock, using the stock fan & cooler on my Supra. Maybe time for a better heatsink 🤔
I ordered the heat sink that Nathan suggested in the thread. It should help
I think I'm gonna grab one too. I've got a cold room, might push for 1.0 with better cooling 🚀
Are you on a custom os or just stock?
Stock, I did enable the overclock settings though.
I wasn't aware of a custom os 👀
Just raise the temperature and the efficiency or another secret menu?
I’m not aware of a custom os either but figured you might know about it 🤣
It lets you use higher freq & voltage settings. To unlock you add "?oc" after the URL to unlock it. Tread carefully, here be dragons 🐉🔥
I was actually able to lower the voltage slightly, while raising the freq a bit.
That’s your average? With the Supra? Wow. How cool is your room?
18° in the room.
I keep the bitaxe temperature at 63°, the fan hovers between 2-3000 rpm
Amazing
I also have a fan circulating air, pointed at the bitaxe. That helps a lot too.
Good idea. I can’t lower the temperature that much in the room where I put it but I could add a fan pointed at it
💯
It helps keep the whole board cool. The asic is one source of heat, but other chips get warm the harder you push it too.
Good to note! I undervolt my Bitaxes too
Do you solo mine or point it at a pool?
Bit of both. I use OCEAN with DATUM, my own block templates coming from my start9 node. The other one is using ckpool to solo mine, but I might switch it over to DATUM too soon.
I imagine you get less hash when you under volt or does lower temperature help somehow?
I didn't notice any drop in hashrate, but if you go too low, it might cause instability or missed shares, I think. Lower voltage and the resulting lower temperature help with efficiency, so it does achieve that. The clock speed is pretty much the only thing (within properly functioning bounds) that changes the hashrate for me. I tuned my boards for efficiency by lowering the voltage and keeping the clock speed about the same.
For the lower voltage, do you think it’s one size fits all or could be different depending on the Bitaxe? Would I get the same results as you or not necessarily?
It's definitely different for each one. I'm running two Gammas, and they're identical except the solo mining one does not have the same efficiency at all, and the voltage regulation works a little differently, being always higher than what I set it at instead of lower on the one mining with OCEAN.
So the whole efficiency and hashrate curves you can get with each one is gonna be fairly unique.
I remember trying to lower the voltage once. When I checked the dashboard I was getting an alert that the voltage was low so I reverted. Do you get any of those?
Hmm, I'm pretty sure I never did. If you only lowered it a little bit, it should be able to handle that just fine. Maybe the firmware has had an update and we just are using different versions of AxeOS. You're running a Supra right? An older model?
Supra yes. That was before I upgraded the firmware though. I guess it doesn’t hurt to try again
Yeah I'd say go for it. It might just have been the interface complaining when it didn't have to. Or it might have been that undervolting was experimental and now they've worked out all the kinks. Or it might still complain haha
Do you leave it on automatic fan control? I’ll try to lower the voltage to 1150 (from 1166)
Yeah, I tried with a fixed fan setting somewhat high for a bit but then settled on automatic.
No warnings so far!
Hell yeah! :rickastley_sm:
Nice. It will vary from device to device, but here is my best with the stock cooler & power supply.
If I go lower on voltage, no hash. If I want to push the frequency higher, I'll need both a better cooling solution, plus a better power supply.
I’m at 490 1150 and 64 right now. New heat sink should arrive soon. Fan today I think
nostr:npub1r837kerdy2yp9vw07zx9qh4zaedgt56v2ely9arm8vextr3h0lssu375fw when you plug in a second fan in the back do you need a second heat sink ?
I just have it hanging behind it pointed at the back. the gamma itself is hanging off the top of a shelf too, it’s pretty messy but I get max airflow that way. no case or anything
Liquid cool?
I haven’t thought about that. I guess that would be much easier to do than with a bitmain. That’s what you do with yours?
I just under clocked every miner I’ve used lol
What liquid do you put it in?
Idk I’ve never liquid cooked n e thing… but veg should work fine?
What? 🤣
Be only done pencil mods on og s1 and underclocked/under volted other gens up the s7.
Ok so no liquid cooling yet
Yes, much better and almost silent. Get a decent heatsink too.
The Bitchin' Sink is great!
https://www.thesolomining.co/shop/product/bitaxe-bitchin-sink-custom-heatsink-black/
Great idea! That’s the device I see under the fan?
“Technical Breakdown: The stock heatsink (yep, the shiny gold one that most Bitaxes are sporting) handles about 10-12W of heat.” It is. Thanks for the link
Big fan of these types of heatpipe northbridge coolers. You've got to hunt around for them on aliexpress or amazon though. They've been on my oc'd ultra's at 25 watts for more than a year at this point.
Good to know! Thanks
I use a noctua fan. It doesn’t cool any better than the stock fan. It’s just way quieter. The cooler is more important for overclocking.
I figured quieter is better. Especially since overclocking .6 TH won’t change much
I’ve noticed the biggest determining factor of stable overclocking is ambient temperature. I can push my bitaxe to almost 2 TH the winter. It’s just a little over 1 TH in the summer.