What Actually Matters in a Game Server: CPU, RAM, and the Stuff Sales Pages Skip
Not all specs are created equal. Here's how to read between the lines of a hosting spec sheet.
Galaxy Nexus Team
Galaxy Nexus Hosting
Most hosting spec sheets are designed to look impressive without telling you what you actually need. "Unlimited slots!" "Enterprise-grade NVMe!" "DDoS protected!"; half of these are true, half are marketing, and the useful information is buried in the fine print.
I've spent years hosting everything from a 5-person Minecraft server to a 60-player Rust box. Here's what I've learned about reading (and ignoring) hosting specs.
Single-Thread Performance Is King
This is the single most important thing to understand about game server hosting, and it's the thing most sales pages actively avoid telling you.
Most game servers, Minecraft especially, run most of their logic on a single thread. That means your CPU's single-core performance matters far more than how many cores you have. A 6-core processor running at 5.0GHz will outperform a 16-core Xeon running at 2.2GHz for almost every game server workload, even though the Xeon has nearly three times the cores.
When you see a hosting plan advertising "Intel Xeon" or "Enterprise CPU", that's often code for older server hardware with lots of cores but mediocre single-thread speed. Great for a database. Not great for a game server.
The Number That Matters
Look for the CPU model and clock speed, not just the brand. A modern Ryzen or Core i9 at high clock speeds will run your game server better than a 5-year-old Xeon. If the host won't tell you what CPU you're getting, that's information in itself.
RAM Speed Matters Almost as Much as Capacity
This one catches people out all the time. Two servers can have 8GB of RAM, but one handles 30 players and the other chokes at 15. The difference is often memory speed and timings.
DDR5 running at 5600MHz transfers data roughly twice as fast as DDR4 at 2666MHz. For a game server, that means chunk data, entity data, and plugin data moves between RAM and the CPU faster. Faster RAM directly translates to smoother tick processing.
Don't get hung up on this if you're buying cheap hosting; you get what you're given. But if you're comparing two plans with identical RAM amounts and one is suspiciously cheaper, slow RAM is often the reason.
What RAM actually does in a game server
Every time a player moves through a new chunk, the server has to load that chunk from disk into RAM, then process it through the CPU. RAM is the middle layer. If it's too slow, chunks load late: that's the "rubber banding" effect where players get teleported backwards.
How much you actually need
Minecraft: 4GB for 10 players, 8GB for 20-30, 12GB+ for heavy modpacks. Rust: 8GB minimum, 16GB recommended. ARK: don't ask. Just get 16GB.
Red flags
"Unlimited slots": doesn't exist. Every server has a physical limit. They're just not telling you where it is so you blame your player count, not the host.
NVMe vs SSD Actually Matters for World Loading
Most hosts advertise NVMe storage now. Some of them mean it. Some of them mean "we have one NVMe drive shared across 50 servers and everyone's IOPS are through the floor."
Here's the real difference. An NVMe drive directly connected to the CPU can read sequential data at 3-7GB/s. A SATA SSD maxes out around 500MB/s. For world loading, that means a 1GB world region file loads in ~150ms on NVMe versus ~2 seconds on SATA.
You feel that difference when you're exploring new terrain or when your server autosaves. On slow storage, autosaves cause visible lag spikes. On NVMe, they're nearly imperceptible.
If a host advertises NVMe storage but won't give you a read speed benchmark, assume it's a shared NVMe array with unpredictable performance. The genuinely good hosts will quote speeds.
"Unlimited Slots" Is Always a Red Flag
I mentioned this above but it deserves its own section. Every server has a physical limit determined by CPU, RAM, and storage throughput. "Unlimited slots" means the host is willing to let you fill your server until it's unplayable, and you'll blame the server software instead of the host.
A better approach: hosts that tell you honestly what their hardware handles. For a Minecraft server on decent hardware, that's roughly:
| RAM | Players (Vanilla) | Players (Modded) | |-----|-------------------|-------------------| | 4GB | 10-15 | 5-8 | | 8GB | 20-30 | 10-15 | | 16GB | 40-50+ | 20-30 |
These are rough numbers. Actual performance depends on CPU, world complexity, plugin count, and player behaviour. But they're honest estimates, not marketing.
What to Look For in a Hosting Spec Sheet
Read past the bold claims and look for:
- CPU model and clock speed. Not just "Intel Xeon": which Xeon? What generation? What clock?
- RAM type and speed. DDR4 at 2666MHz is fine. DDR5 at 4800+ is better. If they don't mention speed, assume the slowest.
- Storage type and allocation. "NVMe" means different things depending on whether it's dedicated or shared. Look for "dedicated NVMe" or IOPS guarantees.
- DDoS protection details. Layer 3/4 vs layer 7 protection makes a big difference. 40Gbps mitigation is fine for most attacks. 10Gbps will get overwhelmed.
- Support hours. "24/7 support" is better than "business hours". "24/7 support with under 15 minute response" is actually good.
What Galaxy Nexus Does Differently
We tell you the hardware. Our Brisbane node runs on enterprise NVMe with dedicated resources. Our Dallas node uses colocated hardware with up to 800Gbps mitigation. We don't do "unlimited" anything; we tell you what your server can handle and help you pick the right tier.
When you look at a hosting plan, the question isn't "what's the cheapest option?". It's "will this hardware actually run my game well?", and most of the time the answer is buried in the spec sheet they don't want you to read closely.