It's really tall already, but if it could be wider, 120 or 140mm wide, you could use larger fans that have more CFM but less noise than a 92mm fan.

I don't like the bottom heatsink being in a different direction to the top. I'd rather it was running the same direction as the top one, then you could put a big fan on one end and blow air down both the heatsinks and put it in a tunnel. It looks a lot of hassle to manufacture the bottom heatsink, the way they made it, with lots of cut outs.

I'm sure Marto thought it was best to deliver 260GH, noise dB(A) wasn't mentioned in the purchase contract, but GH was!  

Haha 79dBA  

For those who don't understand how noisy this is...



If you do a 4 chip think about making standard CPU holes so people can use a CPU heatsink or a radiator block, like KnC and HashFaster do.
If I could use a CPU heatsink with 120/140mm fan it would be so much quieter, or liquid cooling to pump the heat to a radiator and fan outside, would be awesome!

Did you try it and know it works? Can you touch the heatsink for 10 seconds without burning fingers?
I'm guessing you will have to drop the clock/voltage a bit. How low did you go and what was the final GH?
The noise blockers are not as good CFM as the one I'm going to try, 3x Arctic F9 (9 blades) 43CFM.
So if yours work I have hope.  

Yeah I want to run this with less volts like they do 850mV should make it 200GH/200W so I get less heat and can put quieter fans on.
But I think Zich said he got like 23% error rate!  
If I swap with someone with a later batch Feb/Mar will they be more efficient or the same?

Yeah I thought they used 12 instead of 8, but someone corrected me on that, the 12 is for the Rig, the desk has 8, like the Hex8A1.
The chip specs say 850mV for 1GH/W, which was supposed to be their Turbo mode, so I'm surprised these don't even fire up at 850mV.
I did hear a rumor they made a second batch and the first went to DIY, but I was hoping it wasn't true.

Are these A1's chips a different production run to the ones Bitmine are using? How did they manage to get 1GH/1W?
What about the Bitfury 2, is the ETA for that still March? I'm probably just going to wait for another chip.
If I cannot get these running quite I'll eBay them.
If someone can give me the lowest GH/Watt they will run at it would be useful before I pick up a temporary PSU.
But if not I'll find out tomorrow and report back!

OMG guys the fans are worse than I thought! MARTO!  

BOTTOM FANS = Sunon PF92251V1-000U-G99/S99 = 92mm 12V 4.7W 4500RPM 46dBA 75CFM

TOP FAN = Sunon PMD1209PMB1-A(2).GN = 92mm 12V 12.5W 4900RPM 57.6dBA 120.2CFM

The thing is HUGE! Here it is next to a Hex16B!



I don't have time to mess with it today because it's valentines day and a couple of family birthdays too!

All the parts I need have arrived except the PSUs I had on back order.

I'll have to go hunting for a PSU tomorrow, can anyone confirm 850mV it runs < 264W?
I might just pick up a cheap 550W 44A to tide me over. It's using 17.2W just for fans! I'll get that down to 3x 2W hopefully.

On a serious note guys these fans are dangerous to little fingers. Keeps kids away/get fan guards. They only cost a few dollars.

I've been mining here for years and never been hacked. Which Open ID are you using? Are you using a lame password like "abc123"?
Maybe you got hacked by downloading some software? Did you really download a wallet for a coin that had it's own pre-mined genesis coins stolen?  



  

Top one is easy if it's 75cfm replace it with 2x 43cfm = 86cfm.

If the bottom fan is Sunon 2v 2500rpm, leave it as is. If it's faster we'll have to drop the hash speed to get it quiet.

Are they both Sunon Maglev PF92251V1-000U-S99 DC 12v 4.7W?

It's 127.43m3/h 75cfm. I hope they didn't put a 110cfm on the top!

I'm hoping the bottom one is slower too! Dunno how I'd replace 75cfm to that heatsink!

You should be able to stick 2x 92mm fans on top with a lower/quieter RPM in that case.

Yeah the heatsink air flows are in a cross + so you cannot use a wind tunnel to cover both heatsinks with a big fan.

Can you measure the length of the heatsink and see if it's 184mm long.

2x 92mm fans on the top was my next idea, depends on length of heatsink though.

Oh no! Please don't give Marto & Zich any suggestions for stronger fans! They'll use them! GH to the moon, just needs faster fans!

Shhh! Don't mention the Delta 92mm/4800rpm/110cfm! 

Where the heatsinks aligned like this = or this +?

If they were like this = I was going to build a wind tunnel and put a 120mm fan at one end and blow air over both heatsinks.

But last I saw Marto changed the heatsink design to +. For that configuration I was going to put 2x 43cfm 92mm fans on top with cable ties.

The A1 chips you're selling were quoted as "0.35J/20GHash" too. Look how that turned out!  

Can a TP-Link run both Hex16B and Hex8A1 at the same time? Which do u set as default then?


Beastlymac and dozerz are looking to buy if anyone hates the noise! I did warn you about Sunon Maglev 4500rpm.  

Did you get finger guards? If not, be very careful, these are industrial strength fans, can take the end off your fingers!

I'm gonna replace the fans and run it at a lower clock, if mine ever arrive.

What are good settings for 200GH? Will these A1 run at 1GH/1W there like Bitmine's A1?

Can a TP-Link run both Hex16B and Hex8A1 at the same time? Which do u set as default then?

4.5 BTC = 6x Hex16B in late November, 1/6 came December, 5/6 arrived January, ROI = 2.25BTC so far, est. 0.05BTC per day (50 days more!).

5 BTC = 2x Hex8A1 in January, looks to be shipping on time, ROI = est. 0.1BTC per day (50 days+).

I earned 8.8 BTC with graphics cards. My plan to reinvest BTC into ASICs to make more BTC, is er... hopefully going to break even one day!

Todays $500 BTC price is very cheap compared to the cost of hardware to keep up with difficulty. You have to be crazy to be a miner! Some people lose huge fortunes pre-ordering miners! I know someone who started earlier than me with GPUs who could have been a $millionaire if he had just hung on to the BTC and sold at $1000+ instead of pre-ordering with BFL!

I've never been in it for the $ though, I just want to help create a bank/debt free currency, I spend in BTC to change the world one bit at a time!  

I was a bit annoyed myself with missing the end of the Feb batch.

I don't like the new ordering system, I preferred it when you could see every item counting down, had no idea it was close to ending.

But I don't want to risk the March batch with Bitfury 2 on the way either, no idea the price/specs, but Punin seemed very confident!

So even if you missed the Hex8A1, cheer up, we can look forward to seeing what Marto can do with the Bitfury 2 chips in March!  

You can run higher clocks by increasing the cooling, but like you suspect, the return on investment is better served by running more cards slower.

I really recommend the R9 270, the two fan versions, it's 1280 SPUs, for only a single 75W 6-Pin PCI-E.

It's the number of SPU's you have that effect MH/s the most!