Has anyone used an Antminer Airflow Noise Reducer?   Any feedback on the amount of noise it helps to reduce?

https://www.ebay.com/itm/Antminer-Airflow-Noise-Reducer-4x12-Silencer-D3-L3-S9-APW3-Bitcoin-Miner-NEW/122751350608?epid=1767811696&hash=item1c948cf750:g:n3UAAOSwX3FZ-xVx

Lets say you could, what would be the point? A Ryzen 7 is making $4 a day, how much do you think a lowly ULV Dual core cpu would make? And EVEN IF you can get multiple Ryzen 7 level "CPU Blade cards" with the CPU's on proper cooling and the right kind of power delivery in there, I cant imagine them costing anything less than the cost of Ryzen 7 + 100$ so about $400, so, again, why?
Why not a Vega 56? Or two RX 570?

This is the home of cpuminer-opt, The optimized CPU miner.

cpuminer-opt now supports over 50 algorithms with more than 20 optimized to use
AES_NI, AVX, AVX2 and SHA on capable CPUs.

Download

Source and Windows binaries can now be downloaded from git,

https://github.com/JayDDee/cpuminer-opt/releases

New in v3.7.5

New algo keccakc for Creative coin with 4way optimizations

Rewrote some AVX/AVX2 code for more consistent implementation and some
optimizing.

Enhanced capabilities check to support 4way, mor eprecise reporting of
features (not all algos use SSE2), and better error messages when using
an incompatible pre-built version (Windows users).

Introducing 4-way AVX2 optimization giving up to 4x performance inprovement
on many compute bound algos. Currently supported algos include: tribus, nist5,
skein, skein2, blake & keccak, keccakc.

Legacy version 3.5.9.1 May provide better performance on some algos with older CPUs that
don't have AES NI. The legacy version is required to mine hodl with a non-AES CPU. Most users should
use it the master version.

git clone https://github.com/JayDDee/cpuminer-opt -b legacy

Source and Windows binaries can be downloaded from git.

https://github.com/JayDDee/cpuminer-opt/releases/tag/v3.5.9.1


Security warning

Miner programs are often flagged as malware by antivirus programs. This is
a false positive, they are flagged simply because they are miners. The source
code is open for anyone to inspect. If you don't trust the software, don't use
it.

The cryptographic code has been taken from trusted sources but has been
modified for speed at the expense of accepted security practices. This
code should not be imported into applications where secure cryptography is
required.

Errata:

AMD CPUs older than Piledriver, including Athlon x2 and Phenom II x4, are not
supported by cpuminer-opt due to an incompatible implementation of SSE2 on
these CPUs. Some algos may crash the miner with an invalid instruction.
Users are recommended to use an unoptimized miner such as cpuminer-multi.

Solo mining of cryptonight does not work.

Bench stats collection enabled (-p stats) when mining timetravel causes miner to exit after
50 share submissions.

cpuminer-opt does not work mining Decred algo at Nicehash and produces only
"invalid extranonce2 size" rejects.

Benchmark testing does not work for x11evo.

Requirements:

1. A x86_64 architecture CPU with a minimum of SSE2 support. This includes Intel
Core2 and newer and AMD equivalents. In order to take advantage of AES_NI
optimizations a CPU with AES_NI is required. This includes Intel Westbridge
and newer and AMD equivalents. Further optimizations are available on some algos
for CPUs with AVX and AVX2, Sandybridge and Haswell respectively.

Older CPUs are supported by cpuminer-multi by TPruvot but at reduced performance.

2. 64 bit Linux OS. Ubuntu and Fedora based distributions, including Mint and Centos are known
to work and have all dependencies in their repositories. Others may work but may require
more effort.

64 bit Windows OS is supported using the pre-compiled binaries package or may be compiled
with mingw_w64 and msys.

Interesting idea,

Phill or Citronick,

Know if those CPU blade cards can be ran in multiples on a motherboard?

I ask because with the profits on Monero, its been temping to get into more CPU mining...My 1950x has been running around $4-5/day all week......

Just wanted to add, you could buy the onda mobo in a 4U case, fully pre-built (just add gpu) for 500 usd: https://www.alibaba.com/product-detail/mining-machine-ETH-machine-4u-8xgpu_60708486305.html

It costs $110 to ship to my place though.

Does anyone know where you can find replacement  AUC3 I2C 5PIN Cable for the 741. Or even an option that would be a little longer?

The whole story smells.

An organization as big as Nicehash that was keeping all the hash-rate sellers payments in non-cold storage wallets? I don't believe they would/could have been so stupid. It's an exit scam IMHO. They kept raising the minimum payout so they could get that kind of ridiculously high amount that they owed sellers sitting in their hot wallets, waited until it was REALLY high, then they let someone "hack" them and shared the proceeds. That's my tinfoil hat theory, but I think it makes sense.

I think that the majority of their sellers were just people who were too lazy to work out what to mine for themselves, and/or didn't know enough to be able to, so they also don't understand how the explanation Nicehash is giving is pretty weak and lacks credibility. There are just SO MANY noob miners out there. Like I said - what kind of organization manages the huge amount of hash power they were working with, and the huge amounts of BTC they were supposed to be paying out - and doesn't use cold storage or multi-sig wallets for payments?

They were a huge honey trap. Maybe they didn't start out that way but it was probably just too much of a temptation for them. Obviously I don't know even a tiny amount of the facts but from where I stand I don't trust them and never will again. They were one of my 5th or 6th fallbacks and owed me maybe $60-$100 in BTC for small amounts of mining over the last few months, but I never used their wallets so if they had used a fair payment scheme I would have most of that BTC now, but oh well. Maybe if they pay me what they owe me I would recover some respect for them but as if that's going to happen.

What is the recommended Chip temp for S9?
Im currently running between 85-91C.

vosk;

check your board, is it s B250D8P 1.0 or 2.0?  (looks like 1.0, so phil will be able to comment a link for the one he uses) these will dictate memory type needed (ddr3 or 4)  I know phil linked the ram he uses somewhere ~20+ pages ago...

all of the molex/sata plugs need to be powered as per another member's reports... for the PCIE slot power draw.

Thx Marvel. Gonna try this one: G.SKILL Ripjaws Series 8GB DDR4 2400MHz CL16 1.2V SODIMMs (F4-2400C16S-8GRS). A store nearby has it in stock.
I really find it weird how poorly the RAM fits into the slot.

How did you get this to work in the US power wise? Can I use a transformer that steps up the voltage to 220v, or is it a little more complicated than that?

NH would have been great...

My A741 farm is currently mining PPS+ at btc.viabtc.com:3333

Simple setup and dashboard

can you accelerate this tx pls
a34dc4620fa20db060445834c51a0be91da9a5ef66903f89602b33e02b1ae5b1

Ok so its not on any of the current blocks but the next one that will be posted by viabtc it will be on there? and when i get confirmations i'm going to send you a tip bro i really appreciate it

edit: Do you want me to send to your sidehack donation??

I signed up for my choice there is no option anywhere to pay.  

How are they gonna send me a bill? the UPS man came and left a note saying $43.89 is due C.O.D..  On the back it says payable to sender with money order or cashier's check only? So I write a check to Bitmain? Do I put it in an envelope? wtf?

How the hell do i add workers on via BTC lol I dont see any button to add workers just groups