G3D Mark is a standard benchmark that measures graphics performance in real-world gaming scenarios. It simplifies comparing cards from different brands, where higher scores directly correlate with better fps and smoother gaming experiences.

Head-to-Head Verdict, Benchmarks, Value & Long-Term Outlook

This comparison brings together gaming FPS, raw graphics performance, VRAM, feature set, power efficiency, pricing context, and long-term value so you can see which GPU actually makes more sense.

Radeon RX 580 2048SP

2018

Why buy it

✅58.9% more average FPS across 50 tracked games in our benchmark data.
✅300% more VRAM for high-resolution textures and newer games (16 GB vs 4 GB).

Trade-offs

❌Limited future-proofing: older hardware, 16 GB of VRAM, and weaker feature support mean it will age faster in upcoming AAA games.
❌
44% HIGHER MSRP
$229 MSRPvs$159 MSRP
❌Lower G3D Mark per dollar, at 33.3 vs 48.6 G3D/$ ($229 MSRP vs $159 MSRP).
❌183% higher power demand at 150W vs 53W.
❌40.1% longer card at 241mm vs 172mm.

Radeon RX 6400

2022

Why buy it

✅Costs $70 less on MSRP ($159 MSRP vs $229 MSRP).
✅Delivers 45.8% more G3D Mark for each dollar spent, at 48.6 vs 33.3 G3D/$ ($159 MSRP vs $229 MSRP).
✅More future proof: RDNA 2.0 (2020−2025) on 6nm with a newer platform for upcoming games.
✅Draws 53W instead of 150W, a 97W reduction.
✅Measures 172mm instead of 241mm, a 69mm shorter card that is more SFF-friendly.

Trade-offs

❌Lower average FPS than Radeon RX 580 2048SP across 50 tracked games in our benchmark data.
❌Less VRAM, with 4 GB vs 16 GB for high-resolution textures and newer games.

Radeon RX 580 2048SP

2018

Radeon RX 6400

2022

Why buy it

✅58.9% more average FPS across 50 tracked games in our benchmark data.
✅300% more VRAM for high-resolution textures and newer games (16 GB vs 4 GB).

Why buy it

✅Costs $70 less on MSRP ($159 MSRP vs $229 MSRP).
✅Delivers 45.8% more G3D Mark for each dollar spent, at 48.6 vs 33.3 G3D/$ ($159 MSRP vs $229 MSRP).
✅More future proof: RDNA 2.0 (2020−2025) on 6nm with a newer platform for upcoming games.
✅Draws 53W instead of 150W, a 97W reduction.
✅Measures 172mm instead of 241mm, a 69mm shorter card that is more SFF-friendly.

Trade-offs

❌Limited future-proofing: older hardware, 16 GB of VRAM, and weaker feature support mean it will age faster in upcoming AAA games.
❌
44% HIGHER MSRP
$229 MSRPvs$159 MSRP
❌Lower G3D Mark per dollar, at 33.3 vs 48.6 G3D/$ ($229 MSRP vs $159 MSRP).
❌183% higher power demand at 150W vs 53W.
❌40.1% longer card at 241mm vs 172mm.

Trade-offs

❌Lower average FPS than Radeon RX 580 2048SP across 50 tracked games in our benchmark data.
❌Less VRAM, with 4 GB vs 16 GB for high-resolution textures and newer games.

Quick Answers

So, is Radeon RX 6400 better than Radeon RX 580 2048SP?

Yes. Radeon RX 6400 is clearly the better overall GPU here. Radeon RX 580 2048SP averages 58.9% more FPS across 50 tracked games in our benchmark data. You are also looking at 7,728 vs 7,633 in G3D Mark. On top of that, Radeon RX 6400 is a 2022 card with FSR 3 + AFMF, while Radeon RX 580 2048SP is a 2018 model from an older generation with FSR upscaling + limited Frame Generation. So this is not really a tight same-tier comparison. It is more a modern card against an older, weaker alternative.

Which one is more future-proof for 2026 and beyond?

Radeon RX 6400 is the more future-proof choice for 2026 and beyond. You are getting a newer 2022 generation instead of 2018, better frame-generation support with FSR Frame Generation + AFMF (2023) instead of FSR Frame Generation (2023), and a 6nm process instead of 14nm. That broader feature stack should age better as more games lean on modern upscaling and frame-generation support.

Which one is the smarter buy today, not just the cheaper card?

Radeon RX 6400 is the smarter buy today, but it is not as lopsided as a simple winner label makes it sound. Radeon RX 6400 is about $70 cheaper on MSRP at $159 MSRP versus $229 MSRP, and you are getting lower estimated average FPS across 50 tracked games in our benchmark data and 1.2% higher G3D Mark. It also leads G3D-per-dollar by 45.8%. That is why the better overall card still comes out as the smarter buy today, not just the faster one.

Is Radeon RX 580 2048SP still worth buying for gaming in 2026?

Yes. Radeon RX 580 2048SP is still a strong modern gaming GPU: it is still comfortable for 1080p and decent for 1440p, though 4K is more situational. It remains a good buy when you can get it meaningfully cheaper than the alternative around $229 MSRP, even if Radeon RX 6400 is still the cleaner recommendation on overall value today.

Games Benchmarks

Real-world benchmarks and performance projections based on comprehensive hardware analysis and comparative metrics. Values represent expected performance on High/Ultra settings at 1080p, 1440p, and 4K. Modeled using a Ryzen 7 9800X3D reference profile to minimize specific CPU bottlenecks.

Note: Performance behavior can vary per game. Specific architectures may perform better or worse depending on game engine optimizations and API implementation.

Radeon RX 580 2048SP Benchmark Check

Radeon RX 6400 Benchmark Check

Path of Exile 2

Preset	Radeon RX 580 2048SP	Radeon RX 6400
1080p
low	153 FPS	104 FPS
medium	136 FPS	92 FPS
high	115 FPS	79 FPS
ultra	81 FPS	66 FPS
1440p
low	135 FPS	94 FPS
medium	117 FPS	80 FPS
high	84 FPS	67 FPS
ultra	59 FPS	56 FPS
4K
low	58 FPS	45 FPS
medium	53 FPS	42 FPS
high	35 FPS	31 FPS
ultra	31 FPS	28 FPS

Open Radeon RX 580 2048SP Open Radeon RX 6400

Path of Exile 2

Path of Exile 2

Counter-Strike 2

Preset	Radeon RX 580 2048SP	Radeon RX 6400
1080p
low	146 FPS	158 FPS
medium	125 FPS	124 FPS
high	105 FPS	92 FPS
ultra	77 FPS	60 FPS
1440p
low	87 FPS	104 FPS
medium	69 FPS	81 FPS
high	53 FPS	60 FPS
ultra	41 FPS	42 FPS
4K
low	35 FPS	53 FPS
medium	28 FPS	41 FPS
high	23 FPS	33 FPS
ultra	17 FPS	20 FPS

Open Radeon RX 580 2048SP Open Radeon RX 6400

Counter-Strike 2

Counter-Strike 2

League of Legends

Preset	Radeon RX 580 2048SP	Radeon RX 6400
1080p
low	343 FPS	329 FPS
medium	275 FPS	278 FPS
high	229 FPS	210 FPS
ultra	172 FPS	172 FPS
1440p
low	258 FPS	232 FPS
medium	206 FPS	208 FPS
high	172 FPS	156 FPS
ultra	129 FPS	121 FPS
4K
low	172 FPS	134 FPS
medium	137 FPS	121 FPS
high	114 FPS	82 FPS
ultra	86 FPS	54 FPS

Open Radeon RX 580 2048SP Open Radeon RX 6400

League of Legends

League of Legends

Valorant

Preset	Radeon RX 580 2048SP	Radeon RX 6400
1080p
low	236 FPS	251 FPS
medium	207 FPS	186 FPS
high	168 FPS	165 FPS
ultra	142 FPS	138 FPS
1440p
low	182 FPS	192 FPS
medium	161 FPS	139 FPS
high	127 FPS	126 FPS
ultra	104 FPS	101 FPS
4K
low	99 FPS	101 FPS
medium	81 FPS	74 FPS
high	63 FPS	65 FPS
ultra	50 FPS	50 FPS

Open Radeon RX 580 2048SP Open Radeon RX 6400

Valorant

Valorant

Check FPS for your specific build

Technical Specifications

Side-by-side comparison of Radeon RX 580 2048SP and Radeon RX 6400

Radeon RX 580 2048SP

The Radeon RX 580 2048SP is manufactured by AMD. It was released in October 15 2018. It features the GCN 4.0 architecture. The core clock ranges from 1168 MHz to 1284 MHz. It has 2048 shading units. The thermal design power (TDP) is 150W. Manufactured using 14 nm process technology. G3D Mark benchmark score: 7,633 points.

Radeon RX 6400

The Radeon RX 6400 is manufactured by AMD. It was released in January 19 2022. It features the RDNA 2.0 architecture. The core clock ranges from 1923 MHz to 2321 MHz. It has 768 shading units. The thermal design power (TDP) is 53W. Manufactured using 6 nm process technology. It features 12 dedicated ray tracing cores for enhanced lighting effects. G3D Mark benchmark score: 7,728 points. Launch price was $159.

⚡

Graphics Performance

The Radeon RX 580 2048SP scores 7,633 and the Radeon RX 6400 reaches 7,728 in the G3D Mark benchmark — just a 1.2% difference, making them near-identical in rasterization performance. The Radeon RX 580 2048SP is built on GCN 4.0 while the Radeon RX 6400 uses RDNA 2.0, both on 14 nm vs 6 nm. Shader units: 2,048 (Radeon RX 580 2048SP) vs 768 (Radeon RX 6400). Raw compute: 5.259 TFLOPS (Radeon RX 580 2048SP) vs 3.565 TFLOPS (Radeon RX 6400). Boost clocks: 1284 MHz vs 2321 MHz.

Feature	Radeon RX 580 2048SP	Radeon RX 6400
G3D Mark Score	7,633	7,728+1%
Architecture	GCN 4.0	RDNA 2.0
Process Node	14 nm	6 nm
Shading Units	2048+167%	768
Compute (TFLOPS)	5.259 TFLOPS+48%	3.565 TFLOPS
Boost Clock	1284 MHz	2321 MHz+81%
ROPs	32	32
TMUs	128+167%	48
L1 Cache	512 KB+100%	256 KB
L2 Cache	2 MB+100%	1 MB
Frame Generation	FSR upscaling + limited Frame Generation	FSR 3 + AFMF

✨

Advanced Features (DLSS/FSR)

Both cards support Frame Generation, but the Radeon RX 6400 is on a newer tier with FSR Frame Generation + AFMF, while the Radeon RX 580 2048SP tops out at FSR Frame Generation.

Feature	Radeon RX 580 2048SP	Radeon RX 6400
Upscaling Tech	FSR Upscaling / FSR 4	FSR 3
Frame Generation	FSR Frame Generation	FSR Frame Generation + AFMF
Ray Reconstruction	No	No
Low Latency	AMD Anti-Lag	AMD Anti-Lag

💾

Video Memory (VRAM)

The Radeon RX 580 2048SP comes with 16 GB of VRAM, while the Radeon RX 6400 has 4 GB. The Radeon RX 580 2048SP offers 300% more capacity, crucial for higher resolutions and texture-heavy games. Memory bandwidth: 224 GB/s (Radeon RX 580 2048SP) vs 128 GB/s (Radeon RX 6400) — a 75% advantage for the Radeon RX 580 2048SP. Bus width: 256-bit vs 64-bit. L2 Cache: 2 MB (Radeon RX 580 2048SP) vs 1 MB (Radeon RX 6400) — the Radeon RX 580 2048SP has significantly larger on-die cache to reduce VRAM reliance.

Feature	Radeon RX 580 2048SP	Radeon RX 6400
VRAM Capacity	16 GB+300%	4 GB
Memory Type	GDDR5	GDDR6
Memory Bandwidth	224 GB/s+75%	128 GB/s
Bus Width	256-bit+300%	64-bit
L2 Cache	2 MB+100%	1 MB

🖥️

Display & API Support

DirectX support: 12 (Radeon RX 580 2048SP) vs 12.2 (Radeon RX 6400). Vulkan: 1.3 vs 1.3. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 4 vs 2.

Feature	Radeon RX 580 2048SP	Radeon RX 6400
DirectX	12	12.2+2%
Vulkan	1.3	1.3
OpenGL	4.6	4.6
Max Displays	4+100%	2

🎬

Media & Encoding

Hardware encoder: VCE 3.4 (Radeon RX 580 2048SP) vs None (Radeon RX 6400). Decoder: UVD 6.3 vs VCN 3.0 (Limited). Supported codecs: H.264,HEVC,VP9 (Radeon RX 580 2048SP) vs MPEG-2,H.264 (Decode),HEVC (Decode) (Radeon RX 6400).

Feature	Radeon RX 580 2048SP	Radeon RX 6400
Encoder	VCE 3.4	None
Decoder	UVD 6.3	VCN 3.0 (Limited)
Codecs	H.264,HEVC,VP9	MPEG-2,H.264 (Decode),HEVC (Decode)

🔌

Power & Dimensions

The Radeon RX 580 2048SP draws 150W versus the Radeon RX 6400's 53W — a 95.6% difference. The Radeon RX 6400 is more power-efficient. Recommended PSU: 450W (Radeon RX 580 2048SP) vs 350W (Radeon RX 6400). Power connectors: 8-pin vs None. Card length: 241mm vs 172mm, occupying 2 vs 1 slots. Typical load temperature: 75°C vs 75°C.

Feature	Radeon RX 580 2048SP	Radeon RX 6400
TDP	150W	53W-65%
Recommended PSU	450W	350W-22%
Power Connector	8-pin	None
Length	241mm	172mm
Height	—	112mm
Slots	2	1-50%
Temp (Load)	75°C	75°C
Perf/Watt	50.9	145.8+186%

💰

Value Analysis

The Radeon RX 580 2048SP launched at $229 MSRP, while the Radeon RX 6400 launched at $159. The Radeon RX 6400 costs 30.6% less ($70 savings) on MSRP. Performance per dollar on MSRP (G3D Mark / MSRP): 33.3 (Radeon RX 580 2048SP) vs 48.6 (Radeon RX 6400) — the Radeon RX 6400 offers 45.9% better value. The Radeon RX 6400 is the newer GPU (2022 vs 2018).