NVIDIA began shipping a revised lineup of GeForce RTX 30 Series graphics cards in May with a tweaked ETH hash rate that reduces their mining performance by 50 percent. Carrying the LHR (lite hash rate) designation, they were released in an attempt to secure more graphics cards for gamers rather than miners, many of whom have apparently been buying up significant amounts of GPUs.
Unfortunately for NVIDIA (and gamers), the new anti-mining measures implemented in the GeForce RTX 30 Series (sans GeForce RTX 3090) may no longer be an effective deterrent.
As indicated in a recent changelog, the developers behind a piece of software called NBMiner have figured out a way to get around NVIDIA’s LHR clamp and restore around 70 percent of the ETH mining performance that the original GeForce RTX 30 Series graphics cards are capable of.
While it isn’t clear how the developers behind NBMiner managed to sidestep NVIDIA’s restrictions, miners may use the software to boost the hash rate of LHR GPUs and adjust it via various parameters. The developers have advised setting the tuning value to 68, as that value has been tested to be stable one most systems.
- feature: ethash New LHR mode for ETH mining on RTX 30 series LHR GPUs, supports Windows & Linux, able to get ~70% of maximum unlocked hashrate.
- This mode can be tuned by argument -lhr, only works for ethash right now.
- -lhr default to 0, meaning even if -lhr is not set, LHR mode with -lhr 68 will be applied to LHR GPUs if certain GPUs are detected.
- Tune LHR mode by setting -lhr <value>, a specific value will tell miner try to reach value percent of maximum unlocker hashrate, e.g. -lhr 68 will expect to get 68% of hashrate for same model non-LHR GPU.
- Higher -lhr value will results in higher hashrate, but has higher possibility to run into lock state, which will leads to much less hashrate.
- A good start tuning value is 68, which has been tested to be stable on most rig configurations.
- -lhr value can be set for each GPU by using comma separeted list, -lhr 65,68,0,-1, where -1 means turn off LHR mode.