Nvidia LHR series

LHR is a special "Lite Hash Rate" edition of cards Nvidia released. These cards have different core package compared to non-LHR cards, clearly identifiable if you take a look at the PCB after removing heatsink and thermal interface. Nvidia stated that these cards are currently going to be produced and sold simultaneously with non-LHR cards, and that the LHR variations need to be labeled by manufacturing and retail partners.

Since recently, a lot of mining client 100% unlocked the limited hashrate on particular cards. Here are general instructions to follow in order to get your LHR cards get working at 100%.

1. Drivers: Make sure you are running correct drivers version. You can update drivers manually from the console with command nvidia-update --install 510.60.02 (alternatively, you can also download the latest version of msOS 1.4.10 and reflash it).
2. Mining client: Make sure you are using the latest version of mining client (you can select it in the worker's config) that supports 100% LHR unlock: NBMiner, Gminer, T-Rex, BZMiner, or lolMiner. Make sure to follow the configuration recommendations of mining clients (for example, NBMiner dropped lhr parameter so it must be removed from the worker's config, etc.)
3. Overclocking: If you are having issues with your overclocking values and mining client doesn't want to run properly, reduce memory clock by 100-200 Mhz and reboot.

1. Drivers: Make sure you are running correct drivers version, for Windows it is recommended to use a version between 512.16 and 512.77, as starting with 512.95 the unlock no longer works. Use DDU if you need to downgrade the driver.
2. Mining client: Make sure you are using the latest version of mining client (you can select it in the worker's config) that supports 100% LHR unlock: NBMiner, Gminer, T-Rex, BZMiner, or lolMiner. Make sure to follow the configuration recommendations of mining clients (for example, NBMiner dropped lhr parameter so it must be removed from the worker's config, etc.)
3. Overclocking: If you are having issues with your overclocking values and mining client doesn't want to run properly, reduce memory clock by 100-200 Mhz.

Currently released limited models only limit performance in Etchash algorithms, although there exist rumors stating that more algorithms, including those below, are going to be affected with the newer cards.

Other popular algorithms, in which these cards aren't currently limited:

• KAWPOW used by Raven (RVN)
• MTP used by FIRO
• Autolykos2 used by ERGO
• Octopus used by Conflux (CFX)
• BeamHashIII
• RandomX used by Monero (XMR)
• And others.

• 3090 (No LHR version released)
• 3080, 3080, 3070, 3060Ti (These do have LHR versions released, shop carefully)
• CMP series, as these are specifically made for mining purposes
• Older cards, including 10-series, 16-series, 20-series and P10X-series.

• 3080Ti
• 3070Ti

• 3080 LHR
• 3070 LHR
• 3060Ti LHR
• 3060 LHR.

With some of the cards in the last category, Autolykos2 (used to mine ERGO) is affected too on some cards, achieving higher than 50% hashrate, yet still not the full potential. Other algorithms may be affected too.

The bypass of NBMiner is included in minerstat by default and should work both on msOS and Windows-based systems. It's trying to achieve as high performance out of these limited cards as possible (typically around 68% of theoretical max performance is achievable). The approximate results are as following with the new default setting of NBMiner: -lhr 74

• 3060 (including v2) ~36MH/s
• 3060Ti LHR ~43MH/s
• 3070 LHR ~45MH/s
• 3070Ti ~58MH/s
• 3080LHR ~65MH/s
• 3080Ti ~87MH/s

You can adjust the value, including on per-card basis: -lhr 72,0,60,-1. The value -1 sets the mode to off for the specific card (or whole system if only one value is passed). The value 0 applies default setting, currently same as -lhr 68.

Detailed guide for NBMiner is available in this article.

Other miners include bypasses, automatic and manually configureable as well.
T-Rex also includes a dual-mining mode for ETC+RVN, ETC+CFX, ETC+ERGO mining with perfromance being about 30% of ETC and 70% of the secondary coin out of the max potential in solo-mining each coin respectively.

GMiner has support for auto-tuned LHR-semi-unlocking mode as well.

Multiple other miners have partial unlock functionality available too.

Nvidia GTX 3060 cards which have been released previously have been unlocked by several methods.

Unfortunately, in June "LHR" versions of 3060 started appearing which are NOT MARKED "LHR". These cards have increased protection and do not get "unlocked" with the methods listed below and in many cases there is no way of telling them apart except for the BIOS version.

However, even these "LHR" 3060 (not marked officially as LHR) are capable of mining other algorithms listed above at speeds similar to regular "non-LHR" 3060.

This allows you to unlock 45-50MH/s on Etchash on 3060 cards, but it has several limitations.

• Special driver version is required, 470.05. It isn't available from official sources.
• A "dummy plug" or a real display needs to be connected to each card via HDMI or DisplayPort.
• Cards need to plugged in with 8 or 16 PCI-E lanes dedicated to each.

The last of these limitations is the most important one, as most consumer motherboards only provide 1 PCI-E slot supporting x16 lanes. Those motherboards which are labeled "SLI-Ready" have 2 PCI-E slots at x8 lanes each. Some expensive motherboards which use "regular" desktop processors do support 4 devices running at x8 each, but those cost a premium over others with the same chipsets, typically are labeled "WS" or "workstation" and you would likely also need to get x16 to x16 risers.

The lolMiner developers managed to reach limitations at around 38MH/s, which isn't the full performance, but neither does it have the limitations of the Windows method described above. Use this guide for instructions.

You can use the new versions of msOS to use the LHR series cards with new driver version included, available on msOS Version Archive. For most motherboards msOS version 1.4.10+ should work, but if your system requires newer kernel (mostly for newer motherboards, like H510 Pro BTC+), you can use msOS version 1.7.5+.

If you are already using an older version and would prefer to not reinstall, while adding LHR Nvidia GPUs to your system, and they turn out to be not detected on msOS, update drivers with nvidia-update command: nvidia-update --install 470.63.01 Driver updating details are also available here.

If after driver update and reboot, your GPUs are still not detected, then re-check BIOS settings:

• UEFI
• PCIe GEN2
• Above 4G Decoding

On msOS side, you can try this command: pci-realloc