Custom tuned PCs · Nashville, TN

Built one at a time.Tuned by hand.Proven on paper.

Sigil builds custom PCs in Nashville, one machine at a time. Then we tune the CPU, memory, GPU, BIOS and Windows, and hand you the stock-vs-tuned numbers to prove it.

1-of-1No assembly line. One build on the bench at a time.
Fully tunedCPU, RAM, GPU, BIOS and Windows.
Stress-testedIf it isn't stable, it doesn't leave.
Local pickupHand-off in Nashville, walkthrough included.
The difference

Anyone can plug parts together.
We tune them.

Out of the box, most PCs leave performance on the table: memory at loose default timings, CPUs on generic power curves, GPUs running hotter and louder than they need to. Every Sigil gets five layers of tuning.

01

Memory

Timings tightened by hand and validated. This is where latency and stutter live.

02

CPU

Per-core curve optimization and power limits set for your cooler, not a generic default.

03

GPU

Undervolt and overclock dialed in for more frames at lower heat and noise.

04

BIOS

Fan curves, boot settings and platform options set deliberately, not left on auto.

05

Windows

Clean install, current drivers, no bloat. Ready to use the day you get it.

The tuning report

Every build ships with its numbers.

We benchmark your exact machine stock, then again after tuning, and give you the side-by-side. No guesswork, no marketing math: your build, measured.

Average FPS typically climbs 7–10%, depending on the hardware and the silicon. Memory latency and 1% lows tighten up too: the stutter you actually feel. We show you all of it.

AIDA64Cinebench 20243DMark Time SpyCrystalDiskMarkHWiNFO64In-game benchmarks
What's in the reportStock → Tuned
Memory latencyns · lower is betterThe headline number. Tighter memory means a snappier system and fewer frame spikes.
1% low FPSfps · higher is betterThe worst moments of gameplay, not the average. This is what smoothness feels like.
Average FPSfps · per titleMeasured across real games, reported honestly.
CPU render scoreCinebench ptsSingle and multi-core, for creators and workstation buyers.
GPU score3DMarkGraphics performance before and after the GPU tune.
Thermals & stability°C · pass/failTemperatures under load and the stress tests it passed before handoff.
The process

How a Sigil gets made.

01

Spec & source

Every part is chosen for value at its tier. We skip components that cost more without performing more.

02

Build & baseline

Assembled and cable-managed, then benchmarked at stock so there's an honest starting line.

03

Tune, one variable at a time

Memory first, then CPU, then GPU. Each change is tested on its own so every gain is real and every setting is accounted for.

04

Validate & back off the edge

Stress-tested for stability, then settings are pulled back from the limit. You get a machine that's fast every day, not fast once.

05

Report & hand-off

You get the stock-vs-tuned report and a walkthrough at pickup in Nashville.

Every Sigil includes

Priced per build.
Tuned every time.

No cookie-cutter tiers. Every machine is its own spec, priced on what its parts cost to replace today. What doesn't change is what comes with it.

01 · Tune
5 layers

Memory, CPU, GPU, BIOS and Windows, dialed in for that exact set of parts.

02 · Prove
The report

Stock-vs-tuned numbers for your machine: memory latency, 1% lows, FPS, render scores and thermals.

03 · Validate
Stable

Stress-tested, then backed off the edge. If it isn't stable, it doesn't leave the bench.

04 · Hand-off
In person

Local pickup in Nashville with a walkthrough of your build and your report.

Available now

Current builds.

Each build is a single machine. When it's gone, it's gone. Ready-to-go builds are listed on SiliconExchange for pickup in Nashville.

How to buy

Buy through SiliconExchange.

Our ready-to-go builds are listed on SiliconExchange, a marketplace built for PC hardware. You get their buyer protection, and we meet you in Nashville.

Payment held until pickup

You pay online, never in cash. Your payment is held until you confirm the pickup.

6-digit pickup code

Inspect the machine in person first. Happy with it? Give us your pickup code and the payment releases. Not happy? Keep the code and walk away.

Verified seller

Every SiliconExchange seller is identity-verified. You know exactly who built your PC.

Themed builds

Your favorite world, in color.

Want a build that nods to the game you love? We design palettes around it (case, fans, cables, lighting) without slapping logos on the glass. If you know, you know. Here are six to start, or bring us your own.

Start a themed build
Inspired by HaloSpartan
Inspired by World of WarcraftCrown & Crest
Inspired by Cyberpunk 2077Neon Glitch
Inspired by Zelda: Breath of the WildWild Relic
Inspired by DOOMHellfire
Inspired by MinecraftOverworld
Commission a build

Tell us what you want it to do.

Games, resolution, the apps you work in, the look you're after. We'll come back with a spec, a price and a timeline. No obligation.

Got it. We'll be in touch shortly.