Don't Starve Together

The Intel Core i5-9400 paired with the NVIDIA GeForce RTX 5090 produces a fascinating bottleneck scenario in Don't Starve Together, where the GPU's immense power is consistently held back by the older six-core processor. The data shows that while the RTX 5090 is capable of delivering high frame rates, the combination's overall performance is defined by the CPU's limitations rather than the graphics card's capabilities. This pairing ranks 451st out of 1667 tested combos, placing it in the 73rd percentile of all configurations, which is respectable but far from the top tier that the GPU alone would suggest.

GPU Role — VRAM, clocks, and how they relate to this game's results

The NVIDIA GeForce RTX 5090 brings overwhelming specifications to this pairing, with 32 GB of GDDR7 memory on a 512-bit bus delivering 1.79 TB/s of bandwidth. Its Blackwell 2.0 architecture operates at a base clock of 2017 MHz and boosts to 2407 MHz, with 21,760 shading units and 176 ROPs driving pixel rates of 423.6 GPixel/s. These specifications place the GPU in the 94th percentile of all graphics cards, with an average benchmark score of 84,306—roughly 1.3% ahead of the AMD Radeon PRO W6600 and 1.6% behind the NVIDIA CMP 40HX according to nearestRivals data.

Despite this overwhelming hardware, the measured frame rates in Don't Starve Together tell a different story. At 4K Ultra settings, the combo averages 90.5 FPS, while dropping to 4K Low only raises this to 148.9 FPS. The RTX 5090's 104.8 TFLOPS of FP32 compute and 1,636.8 GTexel/s texture rate are grossly underutilized in this game, as the frame rates suggest a CPU-bound scenario. The GPU's 575 W TDP and dual-slot design indicate a high-end part, but the game's relatively simple 2D art style and modest rendering demands mean that the visual settings have a smaller impact on performance than the processor's ability to feed the GPU with draw calls and game logic updates.

Resolution Scaling — how FPS drops from 1080p to 4K and what it says about the limiting component

The resolution scaling pattern reveals a classic CPU bottleneck signature. Moving from 1080p to 4K at High settings, frame rates drop from 162.4 FPS to 113.5 FPS—a 30% reduction. However, the more telling comparison is at Low settings, where 1080p yields 197.5 FPS and 4K yields 148.9 FPS, a 25% drop. This relatively modest scaling across resolutions indicates that the CPU is the limiting factor, as a GPU-bound scenario would show much larger frame rate differences between 1080p and 4K.

The data shows that at 1080p Low, the combo achieves 197.5 FPS, but this is far from the RTX 5090's potential. The gap between 1080p and 1440p at Low settings is 23.4 FPS (197.5 to 174.1), while the gap between 1440p and 4K is 25.2 FPS (174.1 to 148.9). These relatively uniform drops across resolutions suggest that the CPU's six cores and six threads, running at a base clock of 2.90 GHz and boost of 4.10 GHz, are saturated regardless of the rendering load. The i5-9400's 9 MB of shared L3 cache and dual-channel DDR4 memory with 42.7 GB/s bandwidth become the constraining factors, not the GPU's 1.79 TB/s of bandwidth.

FAQ — 4-6 Q&A pairs answerable from FACT PACK data

Q: What is the highest average frame rate this combination achieves in Don't Starve Together?

A: The highest measured average is 197.5 FPS at 1080p with Low settings. This drops to 148.9 FPS at 4K Low, showing a 48.6 FPS penalty for the resolution increase.

Q: How does the i5-9400 compare to its nearest rivals in synthetic benchmarks?

A: The i5-9400's average benchmark score of 2305 is 0.2% higher than the Intel Core i3-10305 (2300) and the Intel Core i3-1125G4 (2299), while being 0.6% lower than the Intel Core i7-8809G (2319). This places it in the 50th percentile of all CPUs.

Q: Does the RTX 5090 perform better in synthetic benchmarks than in this game?

A: Yes. The RTX 5090's average benchmark score of 84,306 places it in the 94th percentile of all GPUs, but in Don't Starve Together, the combo only ranks 451st out of 1667 configurations. This discrepancy highlights the CPU bottleneck.

Q: What is the frame rate difference between Ultra and Low settings at 1440p?

A: At 1440p, Ultra settings produce 130.9 FPS while Low settings produce 174.1 FPS, a difference of 43.2 FPS. This 25% improvement from lowering settings is smaller than expected for a GPU of this caliber, again pointing to CPU limitations.

Q: How does the combo's ranking in this game compare to its component percentiles?

A: The RTX 5090 sits in the 94th GPU percentile and the i5-9400 in the 50th CPU percentile, yet the combo ranks in the 73rd percentile of tested configurations (451st of 1667). The CPU's weaker percentile drags the overall ranking below what the GPU alone would achieve.

Q: What are the RTX 5090's memory specifications and how do they relate to performance?

A: The GPU has 32 GB of GDDR7 memory on a 512-bit bus with 1.79 TB/s bandwidth, operating at 1750 MHz (28 Gbps effective). These specifications are massively overprovisioned for Don't Starve Together, as the game's performance is limited by the CPU's 42.7 GB/s memory bandwidth.

How This Combo Ranks — use comboRankInGame vs other tested combos

The combination of the Intel Core i5-9400 and NVIDIA GeForce RTX 5090 achieves a rank of 451 out of 1,667 tested combos in Don't Starve Together, placing it in the top 27% of all configurations. This ranking is notably lower than what the GPU's individual percentile would suggest, as the RTX 5090's 94th percentile standing indicates it is among the top 6% of all graphics cards. The i5-9400's 50th percentile CPU ranking creates a significant mismatch, and the data shows this pairing produces frame rates that are more typical of a mid-range GPU rather than a flagship one.

The gap between component potential and actual game performance is stark. While the RTX 5090's nearest rivals—the RTX 5090 D (0.1% higher score), RTX 5050 Mobile (0.2% higher), and AMD Radeon PRO W6600 (1.3% lower)—show the GPU's dominance in synthetic tests, the measured FPS in Don't Starve Together do not reflect this hierarchy. The combo's 451st rank among 1,667 configurations means that most combinations involving newer or higher-core-count CPUs outperform this pairing, even with the same or weaker GPUs, because the game's performance ceiling is set by the processor.

Measured FPS Breakdown — resolution by resolution, settings by settings, exact numbers

At 1920x1080, the measured average frame rates are 197.5 FPS on Low, 171.8 FPS on Medium, 162.4 FPS on High, and 148.5 FPS on Ultra. The spread from Low to Ultra is 49 FPS, representing a 25% performance penalty for maximum visual quality. At 2560x1440, the results are 174.1 FPS on Low, 155.4 FPS on Medium, 141.8 FPS on High, and 130.9 FPS on Ultra, with a 43.2 FPS spread between Low and Ultra. At 3840x2160, the results are 148.9 FPS on Low, 129.6 FPS on Medium, 113.5 FPS on High, and 90.5 FPS on Ultra, with a 58.4 FPS spread.

The data reveals that the performance gap between Low and Ultra settings widens as resolution increases, from 49 FPS at 1080p to 58.4 FPS at 4K. This suggests that at higher resolutions, the GPU begins to play a more significant role, though it still does not reach the frame rates that the RTX 5090's specifications would imply. The 4K Ultra result of 90.5 FPS is the lowest measured, while the 1080p Low result of 197.5 FPS is the highest, and the overall pattern shows diminishing returns from lowering settings at every resolution.

Settings Recommendations — which preset gives the best experience per the measured rows

For this combination, the Medium preset at 1440p offers the most balanced experience, delivering 155.4 FPS with a modest visual quality reduction from High. The data shows that upgrading from Medium to High at 1440p costs 13.6 FPS (155.4 to 141.8), while the visual difference is typically minimal in a game like Don't Starve Together. At 4K, the Medium preset at 129.6 FPS is the optimal choice, as it maintains a comfortable frame rate above 120 FPS while avoiding the 16.1 FPS penalty that High settings impose (129.6 to 113.5).

For players prioritizing maximum smoothness, the Low preset at 1080p delivers 197.5 FPS, but this comes at the cost of visual fidelity. The Ultra preset should be avoided at 4K, as the 90.5 FPS result falls below the 100 FPS threshold that many players consider essential for responsive gameplay. The best overall compromise appears to be 1440p Medium at 155.4 FPS, which provides a 24.5% improvement over 4K Medium while maintaining a high level of visual detail. At 1080p, the High preset at 162.4 FPS is recommended over Ultra, as the 13.9 FPS gain from dropping to High (162.4 to 148.5) is worth the minor visual sacrifice.

CPU Role — cores, clocks, and how they relate to this game's results

The Intel Core i5-9400 is a six-core, six-thread processor based on the Coffee Lake architecture, manufactured on Intel's 14 nm process node. It operates at a base clock of 2.90 GHz and boosts to 4.10 GHz, with a 65 W TDP and 9 MB of shared L3 cache. This processor's synthetic benchmark results show a Cinebench R23 multi-core score of 7,969 and a single-core score of 1,125, placing it in the 50th percentile of all CPUs with an average benchmark score of 2,305. Its nearest rivals in synthetic testing are the Intel Core i3-10305 and i3-1125G4, both with scores within 0.2% of the i5-9400.

In Don't Starve Together, the CPU's six threads become the primary constraint. The game's performance at 1080p Low (197.5 FPS) versus 1080p Ultra (148.5 FPS) shows only a 49 FPS difference, which is small compared to what a GPU-bound scenario would produce. The i5-9400's 42.7 GB/s dual-channel memory bandwidth and 9 MB of L3 cache are sufficient for the game's logic, but the processor's aging architecture limits the frame rate ceiling. The data indicates that the CPU is fully saturated at all resolutions and settings, as the frame rate differences between 1080p and 4K are proportionally much smaller than the resolution increase would suggest. This bottleneck means that upgrading the GPU alone would yield minimal improvements, and the i5-9400's six threads without hyper-threading are the definitive limiting factor in this configuration.