Firmware PUP.
PS5UPDATE.PUP is Sony's official system software. You get it from Sony, Kiln installs it, games boot from it.
Briefs.
Short definitions for the two terms every Kiln user must know: the firmware PUP and Vulkan 1.3.
◎ At a glance
Reviewed 2026-10-13.
| Entries | 2 — PUP, Vulkan 1.3 |
| Style | Short, plain, blunt |
| Audience | New emulator users |
| Host | Windows 10 / 11, 64-bit |
The two terms
- Firmware PUP — Sony's official system-software file. You download it, Kiln installs it, never bundled.
- Vulkan 1.3 — the graphics API Kiln renders on. No Vulkan 1.3, no Kiln.
Why only two
Because these are the two that block boots. Everything else is a setting, and settings live in the lab.
Questions
What is PS5UPDATE.PUP?
Sony's official PS5 system-software file. You download it from Sony's page and Kiln installs it via File then Install Firmware.
What is Vulkan 1.3?
The graphics API version Kiln requires. Your GPU driver provides it — current drivers from NVIDIA, AMD, or Intel.
Related
Vulkan 1.3.
Vulkan 1.3 is the graphics API Kiln renders on. Your driver provides it. Old driver, wrong GPU, no frames.
Install firmware.
Download PS5UPDATE.PUP from Sony's official page, then File → Install Firmware. Official file only — Kiln never hosts it.
GPU and CPU.
GPU: Vulkan 1.3, 8 GB+ VRAM, current driver, discrete device selected. CPU: 8 real cores. Everything else is secondary.
The lab.
One rig, blunt grades, no magic settings. Everything the lab knows about frames, settings, and statuses.
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.