When we started building Lagless's fleet in early 2025, we had to pick a CPU we'd be running for the next 3+ years. Get it right, every customer benefits. Get it wrong, you spend the next decade explaining why your modpack hosting is slow.
Here's how we landed on the AMD Ryzen 9950X — and what other hosts in our space are running instead, and why we think they got it wrong.
What Minecraft actually needs from a CPU
Let's start with the workload. Minecraft's main game tick is single-threaded. Every block update, every entity AI step, every player action queues up on one CPU thread, 20 times per second.
When that thread maxes out, your TPS drops. Doesn't matter if you have 64 cores — only one is doing the work.
So the metric that matters for game hosting is single-thread performance. Specifically:
- Boost clock speed — how fast a single core can run when pushed
- L3 cache size — Minecraft is cache-friendly, more L3 = fewer trips to RAM
- Memory bandwidth — DDR5 vs DDR4, faster RAM = faster chunk reads
- TDP / sustained boost — can the chip hold its boost clock under load, or does it throttle?
Multi-core matters too (we run dozens of servers per box), but for per-server performance the single-thread story is what dominates.
Why we picked the Ryzen 9950X
The 9950X (Zen 5, released August 2024) hits the sweet spot:
- 5.7 GHz boost clock — among the fastest single-thread numbers in any server-class CPU
- 80 MB total cache (32 MB L3 + 48 MB L2) — bigger than most competitors, lots of room for hot Minecraft data
- DDR5-6000 ECC support — fast, error-corrected memory
- 170W TDP — sustained boost behavior is strong, not just headline numbers
In practice, this means modpack TPS holds up where it tanks on older hardware. We've benchmarked ATM 9 with 8 active players + heavy automation: the 9950X holds 20.0 TPS where a previous-gen Ryzen 5000 series box drops to 17–18 under the same load.
What other hosts run (and why)
For competitive comparison, here's what we know about the rest of the industry:
Cheap-tier hosts ($1–2/GB) — usually older Ryzen 3000 / 5000 series, sometimes Xeon E5-class chips that are 5+ years old. The math works because shared-CPU oversold servers don't need fast silicon — they need cheap silicon.
Mid-tier hosts ($3–5/GB) — typically Ryzen 5000/7000 series. Decent, but a noticeable single-thread gap from the 9950X.
Premium hosts ($5+/GB) — sometimes match our hardware, sometimes don't (and they're charging more for the brand, not the silicon).
UltraServers — running 7950X3D and 9950X. Same hardware tier as us, at $1/GB. They're the rare exception in the cheap tier — they invested in the silicon. The tradeoff is server density (more servers per box at half the price means tighter neighbor-traffic).
What about the 9900X, 4545P, and Intel Ultra 7 we also run?
Not every Lagless location is on the 9950X. Some run:
- Ryzen 9900X — 12 cores, slightly lower boost (5.6 GHz). Same Zen 5 architecture. Functionally close to the 9950X for game hosting.
- Ryzen 4545P (London) — high-clock single-socket server chip. Specifically picked for its EPYC-like reliability with high boost clocks.
- Intel Ultra 7 265 (Frankfurt subset) — Arrow Lake. We test it where it makes sense; performance is competitive with the 9950X for our workload.
We're explicit about hardware per-location on our hardware page — every customer can see what's running where before they buy. If you need to know whether you're on a 9950X or a 9900X, the configurator's location card tells you.
Why we don't run dedicated cores
People sometimes ask: "If single-thread perf matters, why don't you sell dedicated cores?"
Two reasons:
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Dedicated cores aren't actually what your server needs. What your server needs is headroom — fewer neighbors fighting for the same physical thread. We get that by running fewer servers per box than budget hosts, not by reserving specific cores.
-
Dedicated-core pricing makes the host expensive without making your server faster. Hosts that sell "dedicated cores" usually charge 3–5x for the privilege. The actual perf gain is small if the underlying box is the same. We'd rather price honestly and not run an oversold box in the first place.
What this means for you
If you're shopping for a Minecraft host:
- Single-thread CPU performance is the metric — not core count, not RAM, not "$/GB"
- Modern Zen 4 / Zen 5 / Arrow Lake beats older silicon at any price
- "Premium tier upgrade" is often just newer silicon at higher cost — check what the cheap tier runs
- Hardware specs in marketing copy beat hardware specs hidden in support tickets — if a host won't tell you what they run, that's the answer
If you're already on Lagless, you're on flagship Zen 5 silicon. That's why your TPS holds up.
See our hardware page → · Or just try it free for 48 hours →