Briefs.
Short definitions for the two terms every Kiln user must know: the firmware PUP and Vulkan 1.3.
Firmware PUP.
PS5UPDATE.PUP is Sony's official system software. You get it from Sony, Kiln installs it, games boot from it.
◎ At a glance
Reviewed 2026-10-13.
| Term | PS5UPDATE.PUP |
| What | Official PS5 system software |
| Source | Sony's official page, by you |
| Install | File → Install Firmware |
Definition
PS5UPDATE.PUP is the official PlayStation 5 system-software file published by Sony. It is the console's own firmware in one package.
Kiln boots this official software inside the emulator — the same model as RPCS3, shadPS4, and Kyty-style emulators: user-supplied, official, unmodified.
How Kiln uses it
You download the PUP from Sony's official PS5 system software page. In Kiln: File then Install Firmware, pick the file, wait for the log line.
Then boot system software brings up the PS5 home. Games launch from that booted state.
Full steps: install firmware.
What Kiln never does with it
Kiln never hosts, bundles, mirrors, or modifies the PUP. Any site offering Kiln with firmware included is not Kiln — it is a trap.
No key files, no modding tools, no disc-copying instructions. Official file, official page, done.
Questions
Is the PUP part of Kiln?
No. The PUP is Sony's file. Kiln is the emulator; you supply the official firmware yourself.
Which PUP version should I use?
The current one on Sony's official PS5 system software page. Match what Sony publishes.
Related
Install firmware.
Download PS5UPDATE.PUP from Sony's official page, then File → Install Firmware. Official file only — Kiln never hosts it.
Boot system software.
Firmware installed? Press Boot system software. The log confirms [BOOT] and the PS5 home comes up.
Vulkan 1.3.
Vulkan 1.3 is the graphics API Kiln renders on. Your driver provides it. Old driver, wrong GPU, no frames.
Do I need the games.
Yes. Kiln ships zero games and explains zero ways to get them. You run the library you already own.
Windows installer · 400+ titles in the launcher
Get the launcher.
Install Firmware with your own PS5UPDATE.PUP, boot the system software, then start a game you own.