Fleet efficiency 21.9 J/TH at 20 EH/s
Company: IREN
What the later record shows
Delivered on time · happened December 31, 2024
The T21 options were redirected to more efficient S21 Pro miners rather than exercised as T21s. Fleet efficiency still beat 21.9 J/TH: 16.3 J/TH near 20 EH/s in September 2024 and 15 J/TH at 31 EH/s at year-end 2024.
“Current IREN installed capacity of 18.8 EH/s (16.3 J/TH efficiency), with expansion on track to 20 EH/s (this month)”
2024-09-15 · iren 8-K exhibit (irennvidiah200purchasevf.htm) View cached copy (2026-10-28)Live source ↗
“Current H1 2025 Installed Miner Options 31 EH/s 15 J/TH 50 EH/s 15 J/TH”
2025-01-06 · iren 8-K exhibit (irendec2024monthlyupdate.htm) View cached copy (2026-10-21)Live source ↗
Checked November 12, 2026 against filings, releases and reporting published after the claim was made. Quotes are verbatim from the linked documents.
The claim, verbatim
If the T21 miner purchase options are exercised in full, overall fleet efficiency at 20 EH/s would improve to 21.9 J/TH in H2 2024.
Source (primary)
iren 8-K exhibit (ef20020920_ex99-1.htm) (SEC EDGAR (8-K Ex), press_release)
View cached copy (2026-11-12)Live source ↗
Quote: “If the miner purchase options are exercised in full, overall fleet efficiency for 20 EH/s would improve to 21.9 J/TH”
How we checked this
This claim has not yet been checked assertion-by-assertion against its source. It carries a cited source and quote, but the deeper check has not run. When it does, the result appears here whatever it says.
Additional evidence
confirms iren 8-K exhibit (ef20020920_ex99-1.htm)
Quote: “If the miner purchase options are exercised in full, overall fleet efficiency for 20 EH/s would improve to 21.9 J/TH”
confirms iren 8-K exhibit (irendec2024monthlyupdate.htm)
Quote: “Current H1 2025 Installed Miner Options 31 EH/s 15 J/TH 50 EH/s 15 J/TH”
confirms iren 8-K exhibit (irennvidiah200purchasevf.htm)
Quote: “Current IREN installed capacity of 18.8 EH/s (16.3 J/TH efficiency), with expansion on track to 20 EH/s (this month)”