Aytug Yayman

Software developer · C# / .NET · React

I write Windows tools for AMD Ryzen and DDR5. I also build the ERP system of a freight company.

On GitHub I go by deadfellow34 (opens in a new tab).

C#Developer.cs

namespace AytugYayman; public sealed class Developer{    public string Name => "Aytug Yayman";    public string Role => "Software Developer";     public string[] Stack =>        ["C#", ".NET", "WPF", "React"];     public string[] Focus =>        ["Ryzen", "DDR5", "SMU"];     // TODO: ship ZenStation v1.0}

About

On the desktop I use C# and .NET, on the web React and Node.js.

For the last few months I've mostly been working on AMD Ryzen. First I made a fork of ZenTimings, now I'm writing ZenStation. A few fixes I found along the way also went into ZenTimings and ZenStates-Core.

On the web side I build the ERP system of an international freight company.

What I work on

Hardware access
SMU mailboxes, MSR, SMN and CPUID registers, PM tables
Memory
DDR4 and DDR5 timings, SPD, impedances, latency and bandwidth measurement
Desktop
C#, .NET 10 and WPF, signed auto-update
Web
React, TypeScript, Node.js and Express, SQLite and PostgreSQL

Projects

The three projects I'm working on.

ZenStation.csPrivate repo · coming soon

Windows · AMD Ryzen monitoring and tuning

ZenStation

An AMD Ryzen monitoring and tuning app for Windows. Sensors, memory timings, power limits, Curve Optimizer and a stress test in one window.

Tech stack

C#
.NET 10
WPF
PawnIO
ZenStates-Core
LibreHardwareMonitorLib

Project page

The source is private for now. I'm preparing the first release. License: GPL-3.0.

What's in it

CPU, graphics card, motherboard and memory sensors, with ten minutes of history
DDR4/DDR5 timings, SPD and a memory benchmark
PBO limits, Curve Optimizer, P-states and fan control
Stress test, WHEA errors and an in-game overlay

ZenTimings.csOpen source · GPL-3.0

Fork of irusanov/ZenTimings · v1.40 → v1.44

ZenTimings (fork)

A fork of irusanov's ZenTimings. I added live sensors, a memory and cache benchmark, and tCCD_L readout on DDR5.

GitHub releases: 10
commits: 18
lines added: 17,691

Tech stack

C#
.NET Framework 4.8
WPF
ZenStates-Core

Project page View on GitHub Releases

What's in it

tCCD_L, tCCD_L_WR and tCCD_L_WR2 readout
Speed and latency benchmark for L1, L2, L3 and RAM
A view with all memory channels side by side (also merged upstream)
Turkish user interface

BestFreight.tsxIn-house · in production

Logistics ERP · web application

BEST Freight ERP

A web-based ERP I build for an international freight company. Trips, customs, vehicles and accounting run through it.

Tech stack

React 19
TypeScript
Vite
Tailwind CSS
TanStack Query
Node.js
Express 5
SQLite
PostgreSQL
Socket.IO

Project page

In-house software. I don't share its source code or screenshots.

What's in it

Import and export trips, CMRs and other documents
NCTS, GVMS/GMR, CDS and ICS/ENS customs integrations
GPS vehicle tracking and tachograph data
Accounting, trip profitability and e-invoicing

Open-source contributions

My changes that went into other projects, newest first.

21 Sept 2026irusanov/ZenStates-Corecommit
I reported shifted PM table offsets and irusanov updated the table.
05f9100 (irusanov/ZenStates-Core, opens in a new tab)
19 Sept 2026irusanov/ZenTimingsmerged PR
A view with all memory channels side by side, and a debug report window.
#106 (irusanov/ZenTimings, opens in a new tab)
17 Sept 2026irusanov/ZenStates-Coremerged PR
Code that reads the version, core count and module timings from debug reports.
#27 (irusanov/ZenStates-Core, opens in a new tab)
4 Sept 2026irusanov/ZenStates-Corecommit
The APOB readout and tCCD_L layout were fixed for Zen 5 APUs.
f8dce5b (irusanov/ZenStates-Core, opens in a new tab)
16 Aug 2026deadfellow34/ZenTimingsreleases
Ten releases on the fork. The changes are on the ZenTimings page.
v1.40 → v1.44

Skills

The languages and tools I use.

"languages": C#
TypeScript
JavaScript
SQL
"desktop": .NET 10
.NET Framework
WPF
MVVM
"hardware": AMD SMU
MSR / SMN / CPUID
PM tables
APOB
DDR4 / DDR5
SPD
WHEA
"web": React
Node.js
Express
Vite
Tailwind CSS
TanStack Query
Socket.IO
"data": SQLite
PostgreSQL
"tools": Git
GitHub
pm2
macOS
Windows

Contact

You can write to me on Gmail, GitHub or X.

If a value in ZenStation looks wrong, send the debug report too.