Bitcoin Forum

Hello everybody,

hope this is not a totally noob question, but I can't answer this myself.

I have experimented somewhat with CPU mining. Using my own computer with Intel Core 2 Duo I get about 10-15 kH/s per CPU. Using a cloud server (Windows Azure, AMD Opteron 4171) I get 700-800 kH/s per CPU.
I ran Sisoft's Sandra Crypto benchmark on both systems and found that my cores have about half the processing power of Azure's, but that's a far cry from the >50x mining performance gulf I witnessed.

The only difference is that I have Windows on my desktop PC while I used Ubuntu on the cloud server. Don't believe the difference boils down to that though.

Anyone care to explain what's going on?

Thanks
-- Radiorama

i want to ask that (Windows Azure, AMD Opteron 4171)
serious can mining at 800 kh/s means if u mining at bytecoin or XMR u can get 0.04 btc per hour

so whats the price of this:-(Windows Azure, AMD Opteron 4171)

what algo are you mining or just what coin, mining orge magi i get 10KHS with my I5

i will start mining bcn or XMR because if u got 100 kh/s or more then it u can make 0.001 per hour or more then it

but its only cpu mining i think so not gpu

Did you check your calculations very well 0.001 btc per hour  is a lot of money  :o

most of the time you cant make that much just off your pc, else everyone would be doing it 24/7

SiSoft Sandra is a synthetic benchmark. It benchmarks relatively simple operations such as AES ciphers, perhaps "true" hashing of memory. They are small things, usually designed to adapt to a large set of hardware.
Cryptocurrency hashes might be jokes but they usually concatenate several operations, mangle memory. The processor has an harder time 'figuring out' the best thing to do.
In particular, the Opteron has L3 cache and I'm pretty sure no Core2 model has L3. This can affect syntactic benchmarks hugely, it also has a richer instruction set which could accelerate Sandra.
By contrast, most CPU miners are 'high compatibility' and often don't come with newer CPU support by default.

so the software actually over shoots the actual Hashrate that the cpu can give ?

They measure different things and give different results. Yes, Sandra most likely gives better results. For whatever that means to you.

For gpu mining cgminer seems to be the most popular choice. CPUMiner seems to be the Litecoin preferred CPU miner as the Litecoin wallet natively supports it. I found this attractive as the LItecoin Wallet GUI is pretty nice. The cgminer command line gui is actually very nice as well. There is a windowed GUI available for cgminer, but I found it inferior to its original GUI. Both are clearly pretty mature products that made this process substantially easier.

I have to ask where I can get a miner or build something that mines BSn at 800 kh/s.  I really like playing around with BCN and like mining it, but I am working with CPUs right now and I am only getting around 20 to 50 kh/s.  It is not constant either, so I have no idea what to move to.  Advise please.