Full SM unlock
More actions
| Proven 10 GB | |
| Driver | cmpunlocker-patched driver (610+) |
|---|---|
| Unlock build | 170hx-rir-tool + software IFF |
| Steps | Full SM unlock |
| Source | Discord message |
| Confirmations | Reproduced by @ghostinthedatacenter_87281 (10 GB), 2026-10-19 · details |
The stock card exposes 70 of 128 SMs. There are three tiers:
- 74 SM on both cards: cmpunlocker's +4 SM step (70 + 4). This is the ceiling for the 8 GB card.
Source: @lia_oc, 2026-10-22
- 74 to 80 SM on the 10 GB card: software only, no fuse override needed.
Source: @djpandaman, 2026-10-10
- 80 to 128 SM on the 10 GB card: needs
EN_SW_OVERRIDE, which needs the RIR fuse burn.
Why the 8 GB card cannot go past 74
The extra TPCs beyond 74 are controlled by OPT_TPC_DISABLE, which is burned to 1 on the 8 GB card, and
there is no free RIR to override it. Source: @djpandaman, 2026-10-10
As of 2026-10-26 there is no public SM unlock beyond 70 + 4 for any 170HX except the 10 GB RIR path.
Source: @riko6253, 2026-10-26
10 GB: how far it goes
mrpandagod took a single 10 GB card from 74 to 80 to 94 to 108 to 122 SM, FP16 roughly 12-14 to 22 TFLOPS.
Source: @djpandaman, 2026-10-09
lxwx got the last cores by overriding OPT_TPC_DISABLE ("just override OPT_TPC_DISABLE"), then reached
128 SM at full clock. Source: @lxtend, 2026-10-12
Source: @lxtend, 2026-10-17
Several owners (GhostInTheDatacenter, orrorin, Waypoint, Feralzi) reached 122-128 SM after the RIR burn, starting from
170hx-rir-tool and feeding the notes to an agent. Source: @ghostinthedatacenter_87281, 2026-10-26
The silicon lottery
GPCs/FBPAs marked defective are genuinely defective; enable only the disabled ones, and mask off the defective TPCs within a defective GPC. Source: @zorg33, 2026-10-22 Colo A/B-tested SM pairs and got 126 working SMs on a card where only one SM pair in a "defective" GPC actually failed. Source: @colo2442, 2026-10-22
Known issues
- Warning Power cap above 80 SM. The moment an SM on a previously disabled GPC is enabled, the
self-reported power becomes unreliable (readings above 400 W on a 250 W VBIOS) and the memory clock is forced down to about 1100 MHz with a large FP32 drop. Source: @djpandaman, 2026-10-13 mrpandagod says he later resolved the wattage issue (fix not posted); the threshold starts at 80, not 90, which matters so people's agents are not misled. Source: @djpandaman, 2026-10-22 See Cooling and power for undervolt / shunt options and Troubleshooting.
- Early SM-unlock attempts crashed the card until the method was refined (lxwx, with help from mrpandagod by DM).
- The method is derived from a leaked internal driver archive plus an agent; a longer write-up by @scallion_9883
(Humvee55) exists; see Discord.
Status
128 SM reached and reproduced by several 10 GB owners, so Proven on the 10 GB card. The 8 GB card past 74 is Contested / no public path. See the confirmation below.