Variant comparison

Reported 8 GB and 10 GB

The 8 GB card and the 10 GB card side by side. Prices are reported figures from the Discord on the dates given, not quotes. How to tell which card you have: Which card do I have.

Property	8 GB card	10 GB card	Source
PCI ID	10de:20c2 (subsystem 1585)	10de:2082 (subsystem 1557)	Source: repo github.com/amoghmunikote/170th-Street by amoghmunikote on GitHub, posted by @markshowa, 2026-10-18
HBM	SK hynix HBM2e, 16 of 24 FBPA, 4096-bit	Samsung HBM2e, 20 of 24 FBPA, 5120-bit	Source: repo github.com/matstatman/gpcprobe by matstatman on GitHub, posted by @matstatman, 2026-10-20 Source: @darkmaniac7, 2026-10-30 (site owner, from his own cards); earlier posts that conflict on HBM2 versus HBM2e: Which card do I have#Memory vendor
Memory, stock	8 GB	10 GB	Source: repo github.com/amoghmunikote/170th-Street by amoghmunikote on GitHub, posted by @markshowa, 2026-10-18
Memory, unlocked	64 GB (65536 MiB) Proven	40 GB (40960 MiB) Proven; 48 GB Reported if the sixth stack is healthy, about 1 card in 5 (6 of 30 cards seen)	Source: @zorg33, 2026-10-07 Source: repo github.com/amoghmunikote/cmpunlocker by amoghmunikote on GitHub, posted by @rh3dai, 2026-10-08 Source: @newman_08462, 2026-10-09 Source: @djpandaman, 2026-10-17 Source: @programmerboi, 2026-10-25
Memory beyond that	80 or 96 GB rumoured, nothing shown	80 or 96 GB not achieved Contested: the evidence points to aliasing, not real memory	Source: @djpandaman, 2026-10-12 Source: @colo2442, 2026-10-14
HBM clock, stock	1,458 MHz (NDIV 54, VBIOS 92.00.67.00.01) or 1,728 MHz (NDIV 64, VBIOS 92.00.6D.00.0A)	1,215 MHz	Source: repo github.com/amoghmunikote/170th-Street by amoghmunikote on GitHub, posted by @markshowa, 2026-10-18 Source: repo github.com/PixelML/club-170hx by PixelML on GitHub, posted by @c133, 2026-10-20
Bandwidth, theoretical	1.49 TB/s at 1,458 MHz; 1.77 TB/s at 1,728 MHz; about 1.94 TB/s at NDIV 70	1.56 TB/s; about 1.87 TB/s with all six stacks	Source: repo github.com/amoghmunikote/170th-Street by amoghmunikote on GitHub, posted by @markshowa, 2026-10-18; higher values computed as bus width x 2 x clock
Bandwidth, reported	about 1,493 GB/s on an unlocked card (tool readout)	1,741 GB/s on an unlocked card at stock clocks	Source: @cuddylac997, 2026-10-07 Source: @kio063218, 2026-10-16
HBM overclock	NDIV 68-70 typical, 74 fails	not reported	Source: @alanoo, 2026-10-14
SMs	70 stock, 74 unlocked	70 stock, 74 public; 112-128 after the RIR burn	Source: @lia_oc, 2026-10-22 Source: @wakeupmbrc1, 2026-10-27
RIR fuse records	15 of 16 used, last one partly burned: no burn path	16 of 16 free	Source: @wakeupmbrc1, 2026-10-13 Source: @djpandaman, 2026-10-17
PCIe link, stock	Gen1 x4	Gen1 x4	Source: repo github.com/amoghmunikote/170th-Street by amoghmunikote on GitHub, posted by @markshowa, 2026-10-18
PCIe link, unlocked	Gen2; Gen3 blocked by fuse	Gen2; Gen3 after the RIR burn; Gen4 reported, not public	Source: @djpandaman, 2026-10-09 Source: @wakeupmbrc1, 2026-10-25
PCIe width	x16 needs the PCIe capacitor mod	same	Source: @lxtend, 2026-10-17
NVLink	no path	not public; needs a board-level mod	Source: @lia_oc, 2026-10-22
ECC	yes (cmpunlocker v0.5)	yes	Source: @reala7096, 2026-10-22
Windows	no Windows unlock reported; cmpunlocker is Linux only (an A800 device-ID change is an untested idea)	yes, with the A100 40G / A800 40G driver	Source: repo github.com/amoghmunikote/cmpunlocker by amoghmunikote on GitHub, posted by @rh3dai, 2026-10-08 Source: @wakeupmbrc1, 2026-10-11
Power limit (VBIOS)	250 W (92.00.67.00.01) or 300 W (92.00.6D.00.0A)	250 W; 300 W reported with a no-flash VBIOS loader	Source: @zagitta, 2026-10-12 Source: @lxtend, 2026-10-20
Power, in use	most owners cap at 140-200 W	power-bound above 80 SMs	Source: @djpandaman, 2026-10-13 Source: repo github.com/PixelML/club-170hx by PixelML on GitHub, posted by @c133, 2026-10-20
Power connector	one EPS12V 8-pin	same	Source: @civiloid, 2026-10-15
Cooling	passive heatsink with IHS; forced airflow required	same; memory runs a few degrees warmer (41 C vs 37 C at about 33 W idle)	Source: @ghostinthedatacenter_87281, 2026-10-13 Source: @spectakkular, 2026-10-27
Price, reported (USD per card unless noted)	100-300 before the unlock; 1,900 (eBay, 2026-10-01); 3,000-3,500 (2026-10-13); 3,300-3,600 delivered from China (2026-10-25)	about 200 before the unlock news; 20,000 RMB in China, about the same as an 8 GB card (2026-10-13); cheaper than the 8 GB card on eBay (2026-10-13); 1,200 for a "for parts" card that worked (2026-10-25)	Source: @cuddylac997, 2026-10-07 Source: @djpandaman, 2026-10-12 Source: @lenxtroz, 2026-10-13 Source: @wakeupmbrc1, 2026-10-13 Source: @froggao, 2026-10-13 Source: repo github.com/PixelML/club-170hx by PixelML on GitHub, posted by @c133, 2026-10-20 Source: @kellertreppe123, 2026-10-25 Source: @programmerboi, 2026-10-25
Good for	LLM inference: memory matters most	training, image and video generation, diffusion; compute-bound work	Source: @wakeupmbrc1, 2026-10-13

Which one to choose

Reported

• If you run LLMs, memory per card decides what fits. The 8 GB card gives 64 GB; the 10 GB card gives 40 GB (48 GB if lucky) plus 128 SMs and Gen3. Source: @68x0, 2026-10-26 PCIe only matters sometimes; VRAM matters basically all of the time. Source: @sojun80, 2026-10-20 In the same thread @shudza answered that "128 SM matters too", and @programmerboi that VRAM "only matters sometimes": his pretraining work is compute bound. Source: @shudza, 2026-10-20
  Source: @programmerboi, 2026-10-20
  Source: @programmerboi, 2026-10-20
• If you do not need tensor parallel or training, the 8 GB card serves better; think in memory per watt. Source: @djpandaman, 2026-10-07 The 10 GB card gets more compute and interconnect bandwidth today, the 8 GB card more total memory. Source: @_arcanum_, 2026-10-07
• If you already own 8 GB cards, trading them for 10 GB cards is not worth it for most users: "realistically for most of us, the bottleneck is still VRAM" (@lia_oc); @reala7096: "I wouldn't trade my 8GB cards for 10GB ones". Source: @lia_oc, 2026-10-22
  Source: @lia_oc, 2026-10-22
  Source: @reala7096, 2026-10-22
• Mixing both in one rig works with a per-card unlock profile, but a multi-card setup runs at the pace of the slowest card and link. Source: @djpandaman, 2026-10-07

See also

Which card do I have · 8 GB card · 10 GB card · CMP 170HX · Buying · Unlocks

Imported from the cmpunlocker Discord with credit; see Credits.