Te this postbode, I&rsquo,ll shortly discuss some troubleshooting instruments and strategies that I found invaluable during building and scaling my mining farm operation. This postbode will voorkant temperature some management, physical GPU identification, and some light overclocking strategies. I won&rsquo,t voorkant GPU bios modding ter this postbode just yet, but may be covering this ter a future postbode.
Thermodynamics is the investigate of fever and temperature spil it relates to energy and work. Te the mining process, wij&rsquo,re taking ter electrical energy and using this to perform work. It&rsquo,s this work that&rsquo,s required to power the blockchain overeenstemming proefje of our blockchain protocol. Ter the case of Ethereum this is performing the Ethash algorithm at a rapid rate. A byproduct of this work is the generation of warmth. Warmth is actually lost energy and, to some level, represents energy inefficiency. Additionally, the amount of warmth that mining GPUs produce increases spil the GPUs effort increases. Ter a mining specimen, the effort is measured by hashrate. Performing optimization technics such spil overclocking to increase hashrate will also increase warmth unless other technics are used such spil undervolting to reduce power consumption.
Spil mentioned earlier, custom-built bios modifications won&rsquo,t be the topic of this postbode, but may be covered straks. This straks postbode would voorkant undervolting and more advanced overclocking strategies.
If the warmth byproduct is not treated decently, the electronics will actually become less efficient, and prolonged or extreme temperatures may cause component failure and ultimately a burned out GPU.
Te order to manage temperature, a number of GPU card manufactures will take the same GPU chips, lay them out on a houtvezelplaat vormgeving and then link backplates, specialized heatsinks and ventilatoren tasked with extracting this warmth through conduction and expelling it away from the electronic components through specially designed ventilatoren spil an harass. Some GPU card manufacturers do a excellent job at this, and some, not so much. The MSI GPU cards I mentioned ter my Part 1: Equipment postbode are examples of cards that I think are done well of the cards I&rsquo,ve tested. It doesn&rsquo,t hurt that they&rsquo,re pretty cool looking fan, heatsink and LED designs spil well!
To give a quick list, here are all the GPUs that I presently run and/or have tested mining both Monero and Ether te no particular order:
Spil I mentioned te another postbode, I&rsquo,ve had the best stock-bios mining practice with the MSI GAMING Radeon RX 480 series graphics cards.
Measuring Hot Catches sight of
When working with any localized heat-producing product, it indeed helps to be able to get a visualization of the warmth distribution so that spil you make modifications, you can compare the temperature distributions. For this, I use a Flir camera. Flir is the leader te thermal camera technology and fortunately, makes this technology available even at the individual consumer level. I have the Flir iOS camera attachment that I use to take pictures and movie and measure hot catches sight of for troubleshooting and thermal management. While a bit of a pricey instrument, I very recommend it! I&rsquo,ve also used it to identify waterlines behind walls, find leak sources ter a ceiling, identify studs behind drywall and track animal traffic.
They also make an attachment for Android and if you want an all-in-one device, they also have you covered with a smartphone-less version
With the Flir iOS camera I wasgoed able to measure the effects of certain overclocking, fan-speeds, spacing and how stacking or proximity to other equipments impacts overall temperature. I wasgoed even able to use the camera to create a movie to identify a failed GPU:
Identifying Physical GPU Positioning
If you&rsquo,re using ethOS then you&rsquo,re most likely familiar with the GPU configuration options available via the config verkeersopstopping. For example, a 6-GPU equipment individual equipment configuration would look something similar to this:
You&rsquo,ll notice that I have the core frequency, memory frequency, fan speed, and power config specified for each individual GPU of the equipment. It&rsquo,s applied via the overclocking devices ter ethOS by index, separated by spaces. So, if wij dreamed GPU Five (te a 0-base index) to have a fan speed of 50%, wij would edit that line like so:
However, the index is just the index of the PCIe I/O addresses ter ascending numerical order. This order is not intuitively related to the physical position te which they&rsquo,ve bot installed te the equipment framework or even exactly the order ter which the PCIe slots show up on the motherboard. If you&rsquo,re using a thermal camera, you can take note of the physical location of each GPU by capturing its thermal signature while it&rsquo,s doing a significantly different amount of work from the other GPUs. This is more feasible if each GPU te the equipment is identical.
If you don&rsquo,t have a thermal camera, or if you choose another method, you can also simply play with the fan speeds to have the GPUs identify themselves. To do this, you can use the GPU management features of the mining software running. Te this case, I&rsquo,ll vertoning an example using sg-minergm
Bring the mining management screen up:
you can then go after the key prompts to manage the GPUs individually. If your device doesn&rsquo,t permit you to switch the fan speeds directly from the GPU management screen, you can temporarily switch from using a remote.conf to a local.conf by doing the following:
Then you can edit your local.conf and set a GPU index fan speed to 0. Once you do this, go back into the GPU mining management screen and disable the same GPU (this way you don&rsquo,t have a GPU doing mining while the fan is disabled spil it will overheat truly rapid). The GPUs te the GPU management screen go after the same index scheme spil the order of the params ter the config opstopping. Once you&rsquo,ve disabled the GPU from mining, you can go back to your terminal and apply the fan configs:
This will run a script on ethOS that will use the AMD overclocking devices to apply the settings from the config verkeersopstopping. If you are running AMD-only GPUs like myself, it will only apply the fan settings and not the memory or core clock settings (which te order to apply, require a reboot). This is fine for the purpose of checking which physical GPU card is on which GPU index because wij&rsquo,re just looking to zekering the fan to identify.
If you&rsquo,re using the Gigabyte GA-990FXA-UD3 motherboard that I recommended earlier ter my builds then you can also just use this reference I&rsquo,ve created for the slot-to-index mappings. The table below considers the available expansion slots on the motherboard te order from left to right where the left is closest to the CPU (all are 0-based indexes):