Counter-Strike 2

The Intel Core i5-9400 paired with the AMD Radeon RX 580 delivers a playable Counter-Strike 2 experience at 1080p, but the data reveals a sharp performance cliff as resolution climbs. At 1920x1080 with Low settings, the combo produces an average of 175.1 FPS, which drops to 107.8 FPS at High settings. This is a 38% reduction in frame rate purely from increasing graphical fidelity at the same resolution. Moving to 2560x1440, the High preset yields 72 FPS, and at 4K (3840x2160), the average falls to 39.7 FPS. The scaling pattern indicates that the RX 580's 8 GB frame buffer and 256-bit memory interface become the primary constraint at higher resolutions.

Resolution Scaling

The frame rate degradation from 1080p to 4K is steep and consistent across all settings. At Low settings, the jump from 175.1 FPS at 1080p to 116.5 FPS at 1440p represents a 33% drop, and then to 63.8 FPS at 4K another 45% reduction. The Ultra preset shows an even more dramatic curve: 83.6 FPS at 1080p, 53.3 FPS at 1440p, and 33 FPS at 4K. This pattern suggests that at 1080p, the i5-9400's six cores and 4.10 GHz boost clock are sufficient to feed the GPU, but the RX 580's raw throughput—6.175 TFLOPS FP32 and 193.0 GTexel/s texture rate—cannot sustain high frame rates when pixel count quadruples.

The bottleneck shifts clearly as resolution increases. At 1080p Low, the system achieves 175.1 FPS, which is well above the 144 Hz refresh rate common in competitive gaming. At 1440p Low, the 116.5 FPS average still provides smooth gameplay, but the 4K Low result of 63.8 FPS indicates the GPU is now the limiting factor. The i5-9400's 42.7 GB/s memory bandwidth and dual-channel DDR4 support are not the constraint here; rather, the RX 580's 256.0 GB/s bandwidth is insufficient for 4K rendering in this title. The data shows that 1080p is the sweet spot for this pairing, with 1440p being acceptable at lower settings.

FAQ

Q: What is the best resolution for this CPU-GPU combo in Counter-Strike 2?

A: The data shows 1920x1080 is optimal, with 175.1 FPS at Low settings and 107.8 FPS at High. At 2560x1440, the High preset drops to 72 FPS, while 4K High averages only 39.7 FPS.

Q: How does the RX 580's memory configuration affect 4K performance?

A: The GPU has 8 GB of GDDR5 memory on a 256-bit bus with 256.0 GB/s bandwidth. At 4K Ultra, the average FPS falls to 33, indicating the memory subsystem cannot keep up with the pixel throughput demand.

Q: Is the i5-9400 a bottleneck at 1080p?

A: At 1080p Low, the combo reaches 175.1 FPS, which suggests the CPU is not severely limiting. The i5-9400 scores 7969 in Cinebench R23 multicore, placing it at the 50th percentile among all CPUs, so it provides adequate single-core performance for CS2.

Q: What settings should be used for competitive play?

A: For maximum frame rates, Low settings at 1080p yield 175.1 FPS. Medium settings at the same resolution still produce 144.7 FPS, which is within range of high-refresh monitors.

Q: How does this combo compare to the RX 580's nearest rivals?

A: The RX 580's average benchmark score is 13559, nearly identical to the NVIDIA GeForce GTX 570 at 13564 (0% delta). The GTX 950 scores 13549, a 0.1% difference, showing the RX 580 sits in a tightly packed performance tier.

Q: Does the i5-9400's lack of hyper-threading hurt in CS2?

A: With 6 cores and 6 threads, the CPU delivers 3346 in Cinebench R20 multicore. The data shows 107.8 FPS at 1080p High, which is acceptable, but the 175.1 FPS at Low suggests the game's engine does not heavily utilize the extra threads.

GPU Role

The AMD Radeon RX 580's specifications directly explain its behavior in Counter-Strike 2. The GPU operates at a base clock of 1257 MHz and a boost clock of 1340 MHz, with memory running at 2000 MHz (8 Gbps effective). These clocks, combined with 2304 shading units and 144 texture mapping units, produce a pixel rate of 42.88 GPixel/s and a texture rate of 193.0 GTexel/s. The FP32 performance of 6.175 TFLOPS is the theoretical ceiling for raw compute, but CS2's rendering workload is more dependent on texture fill and pixel throughput.

The 8 GB VRAM capacity is not the limiting factor at 1080p, but the 256.0 GB/s bandwidth becomes critical at higher resolutions. At 4K Ultra, the average FPS drops to 33, which is below playable thresholds. The GPU's 32 ROPs are also a constraint, as they handle final pixel output. The RX 580's benchmark scores place it at the 53rd percentile among all GPUs, with an average score of 13559. Its nearest rival, the GTX 570, scores 13564 (0% delta), while the GTX 950 scores 13549 (0.1% delta). This indicates the RX 580 is a mid-range card from its generation, and the data confirms it struggles beyond 1440p in this title.

The 185 W TDP and dual-slot cooler design are typical for this performance class, but the 1x 8-pin power connector and 450 W suggested PSU indicate the card is not power-hungry by modern standards. The PCIe 3.0 x16 interface matches the i5-9400's Gen 3, 16-lane CPU connection, so there is no bandwidth mismatch. In CS2, the GPU's role shifts from being the primary driver at 1080p to a clear bottleneck at 4K, where the 33 FPS Ultra result shows the Polaris 20 chip's limitations.

Measured FPS Breakdown

At 1920x1080, the combo delivers its best results. Low settings produce an average of 175.1 FPS, Medium reaches 144.7 FPS, High drops to 107.8 FPS, and Ultra falls to 83.6 FPS. The spread between Low and Ultra is 91.5 FPS, which is a 52% reduction from the lowest to highest preset. This wide margin indicates the RX 580 has headroom at 1080p, and the i5-9400's 4.10 GHz boost clock can drive the GPU effectively at lower settings.

At 2560x1440, the numbers compress. Low settings average 116.5 FPS, Medium 96 FPS, High 72 FPS, and Ultra 53.3 FPS. The delta between Low and Ultra narrows to 63.2 FPS, showing that the GPU's fill rate is becoming a factor. The 1440p High result of 72 FPS is still smooth for most players, but the Ultra preset at 53.3 FPS starts to feel less responsive.

At 3840x2160, the performance collapses. Low settings average 63.8 FPS, Medium 53.9 FPS, High 39.7 FPS, and Ultra 33 FPS. The 4K Low result is barely playable, and the Ultra result of 33 FPS is not suitable for competitive play. The data shows a clear progression: 1080p is fully playable, 1440p is acceptable at mid settings, and 4K is only viable at Low settings. The measured FPS values are all averages, with no min or max frames recorded, so consistency at these levels is not documented.

How This Combo Ranks

The Intel Core i5-9400 + AMD Radeon RX 580 combination ranks 1497 out of 1632 tested combos in Counter-Strike 2. This places it in the bottom 8% of all system configurations, which reflects the age of both components. The i5-9400's percentileVsAllCpus is 50, meaning it sits exactly at the midpoint of all CPUs, while the RX 580's percentileVsAllGpus is 53, just above the median. The CPU's average benchmark score is 2305, with its nearest rivals being the Intel Core i3-10305 at 2300 (0.2% delta) and the Intel Core i3-1125G4 at 2299 (0.2% delta). The GPU's average score of 13559 matches the GTX 570 at 13564 (0% delta), showing both components are in the middle of their respective performance distributions.

The low combo rank relative to the individual component percentiles suggests that this pairing is suboptimal for CS2 specifically. The game's engine appears to favor higher single-thread performance, which the i5-9400 provides with its 1125 Cinebench R23 single-core score, but the overall system is held back by the GPU's 4K limitations. The rank of 1497 out of 1632 indicates that most other tested combos achieve higher frame rates, likely due to newer architectures with better memory bandwidth and higher clock speeds. The 1080p Low result of 175.1 FPS is respectable, but the data shows that this combo is not competitive with more modern hardware in this title, particularly at higher resolutions where the RX 580's 256-bit memory bus becomes a clear disadvantage.