All About BTC, LTC, ETH mining as well as other alternative crypto currencies
The enterprise segment is constantly upgrading their hardware and this fuels the second hand market with interesting and very affordable yet pretty powerful hardware that can also be used for crypto mining. The latest wave of hardware getting replaced and available at a really affordable prices are the first generation of Intel 2011 E5 dual CPU Xeon workstations and servers. This means that you are able to easily acquire a very nicely priced second had server system with two 8-core processors such as Intel Xeon E5-2650 v1 getting 16 physical or 32 logical cores with Hyper Threading. The big question here however is if systems like that that may be acquired cheap are really worth using for crypto mining as they only come with a lot of CPU power, but no GPU capable of being used for mining as for server needs not much GPU power is required generally. We have picked up one such cheap systems off eBay with dual Xeon E5-2650 processors and put it through some benchmarks to gent a better idea on what to expect…
Currently it seems that the only worthwhile CPU-based algorithm to check is the CryptoNight and using the what seems to be the fastest CPU software available at the moment – the XMR-Stak CPU Miner for Monero (XMR). Running the XMR-Stak miner on all 32 logical cores has managed to get us an average hashrate of about 523 HS (hashes per second). The result may not seem that bad for CPU mining, considering that it is a bit slower than a single high-end GPU and the power used by the system is about 150 Watts, so again similar to a more recent higher-end GPU.
We need to run the numbers through an XMR mining calculator and doing just that on Cryptocompare shows that we are actually going to be mining with profit, but the profit isn’t going to be that much. With the current rate it would take a couple of years just to earn back what we have paid for the hardware itself. Not very interesting to CPU mine with such a system, but this is just at the moment, with some new and interesting developments for coins that are only CPU mineable appearing things might look very different… especially if you get a couple of these dual CPU systems to have handy. For the moment however you might want to check them out if you have some other computational needs than crypto mining as the price they can be acquired for is really attractive and again they are still pretty powerful as far as CPU performance goes.
At the moment Nvidia GPU miners have the advantage for mining X11-Ghost with a faster hashrate for the more recent Maxwell and Pascal GPUs than AMD miners. Still AMD miners might be interested in checking out the X11-Ghost algorithm used by SIBCoin (SIB) as it is not that power hungry and with the increased interest with the recent addition of the algorithm on NiceHash as it might offer a nice profitability for users willing to sell their hashrate and get paid in Bitcoins directly.
So if you are using AMD GPU mining rigs you might want to check out X11-Ghost on NiceHash using the latest sgminer 5.6.0 Nicehash Fork (source). We are seeing a hasrate of between 7 MH/s and 8 MH/s on stock Radeon RX 480 and while still slower than about 11 MH/s on a stock Nvidia GTX 1070 the fact that the algorithm is not that power demanding and you can use lower power for the GPUs may make it attractive for some users, so do give it a try. Older generation of AMD GPUs may not be the best choice for this algorithm performance wise and the same pretty much goes for older Nvidia GPUs, but for AMD Polaris and Nvidia Maxwell and Pascal it is.
The recent addition of the X11-Ghost algorithm on NiceHash that is being used by SIBCoin (SIB) has increased the user interest in the coin and the algorithm as expected. NiceHash has recommended the use of the latest release of ccMiner by tpruvot for X11-Ghost support on their servers, but it seems that this is not the fastest solution available to Nvidia miners as was pointed out to us. While ccminer v1.8.4 from tpruvot does about 8 MHs on a stock GTX 1070 GPU, but you can get faster speeds on the same hardware by using the latest ccMiner fork from alexis 78 (source). We have compiled a 64-bit Windows binary with Compute 5.x support and CUDA 7.5 for Nvidia Maxwell GPUs from the latest source for mining X11-Ghost (SIBCoin) and with it you can get about 10-11 MHs on a stock GTX 1070 GPU.
Do note that on mining rigs with multiple GPUs you might need to increase the amount of virtual memory (SWAP file) if you have less system memory in order to be able to run the miner with the default high intensity. On a 6x GTX 1070 GPUs mining rig with 8GB RAM we’ve had to increase the virtual memory to 24GB in order to be able to run the miner properly at the default intensity of 22 set for the X11-Ghost algorithm in the miner, otherwise the miner just crashes… 8GB RAM and 20GB SWAP file was not enough apparently.