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 the argument that drove the decision, why single-thread clock speed beats core count for game hosting, and what other hosts in our space run instead.
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 means fewer trips to RAM
- Memory bandwidth: DDR5 vs DDR4, faster RAM means 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 high clock speed wins
This is the spine of the whole decision. A chip with a high boost clock and strong sustained behavior keeps that one game thread fast, and a fast game thread is what holds your TPS.
What we wanted from the silicon:
- A 5.7 GHz boost clock, among the fastest single-thread numbers in any current desktop CPU
- A big cache, lots of room for hot Minecraft data so the chip isn't waiting on RAM
- DDR5 support, fast modern memory
- Strong sustained boost, not just headline numbers that throttle under load
This is exactly what the AMD Ryzen 9 9950X delivers today: 16 high-clock cores, 5.7 GHz boost, DDR5, the current-gen flagship of AMD's desktop line. That's the chip we picked. We also run the 9900X where it makes sense, plus a 4545P and an Intel Ultra 7 filling specific roles, but the 9950X is the standard.
In practice, this means modpack TPS holds up where it tanks on older hardware. We've benchmarked ATM 9 with 8 active players and heavy automation: a 5.7 GHz fleet holds 20.0 TPS where a previous-gen Ryzen 5000 series box drops to 17 or 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 to $2/GB) usually run 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 to $5/GB) typically run Ryzen 5000/7000 series. Decent, but a noticeable single-thread gap from a 5.7 GHz flagship.
Premium hosts ($5+/GB) sometimes match our hardware, sometimes don't (and they're charging more for the brand, not the silicon).
UltraServers run 7950X3D and 9950X. Same desktop-flagship tier, at $1/GB. They're the rare exception in the cheap tier, they invested in the silicon. The tradeoff is server density: more servers per box at half the price means tighter neighbor-traffic.
How this maps to our catalog
Almost every Lagless location runs the same chip: the Ryzen 9 9950X. One standard, not a grab-bag of parts. It's the current-gen desktop flagship, so if you've benchmarked a 9950X you already know how your server thread behaves. A handful of boxes run the 9900X or a 4545P where capacity demands it, and they're close enough in single-thread that you won't feel the difference.
The one exception is Frankfurt, where a subset runs an Intel Ultra 7 265. We test it where it makes sense and its single-thread performance is competitive with the 9950X for our workload.
We're explicit about hardware per-location on our hardware page, every customer can see what's running where before they buy.
Why we don't run dedicated cores
People sometimes ask: "If single-thread perf matters, why don't you sell dedicated cores?"
Two reasons.
First, dedicated cores aren't actually what your server needs. What your server needs is headroom, fewer neighbors fighting for the same physical thread. We get that by running fewer servers per box than budget hosts, not by reserving specific cores.
Second, dedicated-core pricing makes the host expensive without making your server faster. Hosts that sell "dedicated cores" usually charge 3 to 5x for the privilege. The actual perf gain is small if the underlying box is the same. We'd rather price honestly and not run an oversold box in the first place.
What this means for you
If you're shopping for a Minecraft host:
- Single-thread CPU performance is the metric, not core count, not RAM, not "$/GB"
- A high boost clock on modern silicon beats older hardware 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 Ryzen 9 9950X silicon at 5.7 GHz. That's why your TPS holds up.
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