Microsoft says a Windows 11 DirectX upgrade can supercharge ray tracing—up to 90% faster in demos

Microsoft is promising a major speedup for one of PC gaming’s biggest performance hogs: ray tracing. A new DirectX update for Windows 11 adds a feature called Shader Execution Reordering (SER) that, in Microsoft-backed technical demos, boosted ray-traced performance by as much as 90% on Intel’s Arc GPUs—and about 40% on Nvidia’s flagship RTX 4090.

If those gains hold up in real games, SER could mean fewer frame-rate dips when explosions fill the screen, reflections stack up in rainy city streets, or shadows get dense in big open-world scenes. The catch: gamers won’t see the benefit automatically. Studios have to update how their games run ray tracing to take advantage of it.

What SER actually does—and why it matters

Ray tracing looks great because it simulates how light bounces through a scene, but it’s brutally inefficient when a GPU has to juggle lots of different ray calculations at once. SER is Microsoft’s attempt to make that chaos more orderly.

In plain English, SER reorganizes ray-tracing work so the GPU can process similar tasks together instead of constantly switching gears. Think of it like turning a messy, stop-and-go merge into multiple lanes that move at the same speed. Less wasted effort, more frames per second.

The headline numbers: big on Intel Arc, solid on Nvidia—so far

Microsoft and early reporting around the DirectX SDK update point to eye-popping results on Intel’s Arc hardware, particularly the Arc “B-series” architecture, where demos showed up to a 90% uplift. On Nvidia’s RTX 4090, the same approach was cited at roughly a 40% improvement in similar demo conditions.

Those are not guarantees for your favorite game. They’re based on technical demonstrations designed to highlight the feature, not the messy reality of full commercial titles with sprawling engines, CPU bottlenecks, and years of legacy code. Still, even a fraction of that improvement could change how aggressively developers lean into ray-traced lighting and reflections.

Why you won’t get a free FPS boost overnight

This isn’t a magic Windows switch that instantly makes every ray-traced game faster. To use SER, developers need to modify their ray-tracing rendering pipeline—more like a targeted rework than a simple patch.

That means adoption will likely start with new releases and major updates to big-budget games, where studios have the engineering muscle to revisit core rendering code. Smaller teams may take longer, and some older games may never be updated.

What it could mean for the GPU race

Intel has been trying to claw its way into a GPU market dominated by Nvidia, with AMD as the other major player. If SER consistently delivers outsized gains on Intel Arc, it gives Intel a sharper story to tell: better ray tracing performance per dollar—at least in workloads optimized for the new DirectX path.

For Nvidia, even a smaller percentage bump is still welcome, especially as ray tracing becomes a default expectation in high-end PC releases. The bigger competitive question is how quickly game studios adopt SER—and how AMD responds with its own optimizations and driver-level improvements.

The promise: better-looking games without the usual performance tax

Ray tracing has long been the visual flex that comes with a painful tradeoff: turn it on, watch your frame rate drop. SER is aimed directly at that problem, potentially letting developers push more realistic shadows, reflections, and lighting while keeping gameplay smooth.

If the industry embraces it, SER could help shift ray tracing from a “nice-to-have if you can afford the frames” feature into something more mainstream—especially as Windows 11 and DirectX remain the default platform for most PC gaming.

The fine print: real-world results will vary

SER’s biggest obstacle may be expectations. A “90% faster” headline can sound like every ray-traced game is about to double its frame rate. In practice, performance depends on the game engine, the scene complexity, the GPU, and whether ray tracing is the main bottleneck in the first place.

But the direction is clear: Microsoft is still investing heavily in DirectX to keep Windows at the center of PC gaming, even as alternatives like Vulkan compete for developer attention. If SER proves itself in shipping games, it could become one of the most important under-the-hood upgrades PC gamers never see—but feel every time the action heats up.