Microsoft Flight Simulator (2020/2024) is one of the few games where storage genuinely bottlenecks the experience, not just load times. The world streams terabytes of satellite imagery, elevation data, and autogen buildings in real time as you fly, and that streaming is constant, not a one-time load screen. This makes it a good test case for whether an SSD upgrade actually matters, or whether it’s marketing noise.
Short answer: it matters more here than in almost any other game. Long answer below, with actual numbers.
Why Flight Sim stresses storage differently
Most games load a level once, then it sits in RAM. Flight Simulator never stops reading from disk. As you fly over a city, it’s constantly fetching new photogrammetry tiles, building meshes, and texture data for the terrain ahead of you, while discarding what’s behind you. At airliner cruise speeds this is manageable. At low altitude over a dense city, or when you crank sliders for terrain level of detail, the read demand spikes hard.
On a hard drive, this shows up as a specific, recognizable failure mode: blurry textures that take 5-10 seconds to resolve into sharp ones, buildings popping in late, or in bad cases, whole chunks of a city staying as flat gray boxes until the drive catches up. It’s not a crash, it’s a persistent “the world can’t keep up with the plane” feeling, worst on approach into complex airports like LAX or anywhere in Europe.
What the drives actually do
A 7200 RPM hard drive sustains roughly 120-160 MB/s sequential and falls apart on random reads, often under 2 MB/s with real seek latency, which is closer to what Flight Sim’s tile streaming looks like since it’s pulling many small, scattered files, not one big sequential stream. A SATA SSD holds 500-550 MB/s sequential and tens of thousands of random IOPS, no seek penalty. An NVMe SSD on a decent PCIe 3.0 or 4.0 link pushes 2,000-7,000 MB/s.
| Drive type | Typical sequential read | Random 4K read | Flight Sim behavior |
|---|---|---|---|
| 7200 RPM HDD | 120-160 MB/s | 0.5-2 MB/s | Visible texture pop-in, blurry ground textures, stutters near cities |
| SATA SSD | 500-550 MB/s | 40-90 MB/s | Minor pop-in only at high LOD settings or fast low-altitude flight |
| NVMe SSD (PCIe 3.0) | 3,000-3,500 MB/s | 150-400 MB/s | Textures resolve almost immediately, rarely a bottleneck |
| NVMe SSD (PCIe 4.0/5.0) | 5,000-7,500 MB/s | 400-800 MB/s | No meaningful streaming limitation; CPU/GPU become the bottleneck |
These numbers are generalized from drive specs across each category, not one specific tested model, but they’re representative of what you’ll see across the market.
Does NVMe actually beat SATA SSD in practice
Here’s where I’ll be straight with you instead of hyping the top row: once you’re off a hard drive, the jump from SATA SSD to NVMe is a smaller gain than the jump from HDD to SATA SSD. Flight Sim’s streaming is bottlenecked as much by CPU-side decompression and the game engine’s own tile-loading logic as by raw drive bandwidth. A SATA SSD already eliminates almost all the ugly pop-in you’d see on a hard drive. NVMe mostly helps in two specific scenarios: flying low and fast over dense cities (think airshow-style flying over Manhattan), and cutting the one-time scenery cache rebuild time after updates, which can otherwise take a while on SATA.
If you’re building a new system anyway, go NVMe, prices have converged close enough to SATA that there’s little reason not to. If you’re deciding whether to replace an existing SATA SSD just for this game, it’s not worth it. Spend that money on more RAM or a better GPU instead, both matter more for frame rate.
What to actually buy
If you’re still running Flight Sim off a hard drive, that’s the upgrade that matters, and it’s not close. Moving the install (not just Windows) to any SSD will fix the vast majority of the stutter and blur you’re seeing. Budget options are genuinely fine for this; you don’t need the fastest drive on the market, you need to not be on spinning rust. A 1TB SATA SSD is a sensible, cheap floor, and if your motherboard has a free M.2 slot, an NVMe SSD costs barely more these days and gives you headroom for other games too.
Flight Sim’s install plus World Update content and rolling cache can eat 150-200GB without much effort, so don’t undersize it. A 2TB NVMe SSD is the sweet spot if you also run other large games, since you won’t be stuck uninstalling things every few months to make room for updates.
If your current drive is an older SATA SSD and you’re tempted to upgrade purely for this game, save your money, that upgrade is marginal. If you’re still deciding between an internal upgrade and offloading the game to external storage, don’t: Flight Sim’s streaming demands make it a poor candidate for even a fast external SSD over USB, let alone external HDD storage, as USB latency and bus contention reintroduce some of the same stutter you were trying to escape. Keep flight sim installs internal if at all possible.
One last practical note: if you move the install to a new drive, use the in-game “Change Install Location” option under General Settings rather than copying files manually. The installer tracks content package metadata that a raw file copy won’t preserve correctly, and a broken metadata reference means re-downloading content you already have.
