Iris Pro Graphics 580
Radeon R9 M385X
Iris Pro Graphics 580 vs Radeon R9 M385X Performance Spectrum
About G3D Mark
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.
Iris Pro Graphics 580 vs Radeon R9 M385X FPS Benchmarks
Predicted gaming performance across popular games. Tested paired with Ryzen 7 9800X3D to isolate GPU performance.
Search any supported game below to compare 1080p FPS for both components.
Path of Exile 2
Counter-Strike 2
League of Legends
Iris Pro Graphics 580 vs Radeon R9 M385X: Pros, Cons & Final Verdict
See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.
Iris Pro Graphics 580
2015Why buy it
- ✅Draws 45W instead of 75W, a 30W reduction.
Trade-offs
- ❌Less VRAM, with Unknown vs 512 MB for high-resolution textures and newer games.
- ❌2015 hardware with Unknown of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌Lower G3D Mark per dollar, at 0 vs 6.6 G3D/$ (Unknown MSRP vs $300 MSRP).
Radeon R9 M385X
2015Why buy it
- ✅Delivers 100+% more G3D Mark for each dollar spent, at 6.6 vs 0 G3D/$ ($300 MSRP vs Unknown MSRP).
- ✅100+% more VRAM for high-resolution textures and newer games (512 MB vs Unknown).
- ✅Iris Pro Graphics 580 is already obsolete for modern gaming, so Radeon R9 M385X is the less risky modern option long term.
Trade-offs
- ❌2015 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌66.7% higher power demand at 75W vs 45W.
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Iris Pro Graphics 580 vs Radeon R9 M385X Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
Iris Pro Graphics 580
The Iris Pro Graphics 580 is manufactured by Intel. It was released in September 1 2015. It features the Generation 9.0 architecture. The core clock ranges from 350 MHz to 950 MHz. It has 576 shading units. The thermal design power (TDP) is 45W. Manufactured using 14 nm+ process technology. G3D Mark benchmark score: 1,985 points.
Radeon R9 M385X
The Radeon R9 M385X is manufactured by AMD. It was released in May 5 2015. It features the GCN 2.0 architecture. The core clock ranges from 1000 MHz to 1100 MHz. It has 896 shading units. The thermal design power (TDP) is 75W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,994 points.
Graphics Performance
The Iris Pro Graphics 580 scores 1,985 and the Radeon R9 M385X reaches 1,994 in the G3D Mark benchmark — just a 0.5% difference, making them near-identical in rasterization performance. The Iris Pro Graphics 580 is built on Generation 9.0 while the Radeon R9 M385X uses GCN 2.0, both on 14 nm+ vs 28 nm. Shader units: 576 (Iris Pro Graphics 580) vs 896 (Radeon R9 M385X). Raw compute: 1.094 TFLOPS (Iris Pro Graphics 580) vs 1.971 TFLOPS (Radeon R9 M385X). Boost clocks: 950 MHz vs 1100 MHz.
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| G3D Mark Score | 1,985 | 1,994 |
| Architecture | Generation 9.0 | GCN 2.0 |
| Process Node | 14 nm+ | 28 nm |
| Shading Units | 576 | 896+56% |
| Compute (TFLOPS) | 1.094 TFLOPS | 1.971 TFLOPS+80% |
| Boost Clock | 950 MHz | 1100 MHz+16% |
| ROPs | 9 | 16+78% |
| TMUs | 72+29% | 56 |
Advanced Features (DLSS/FSR)
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| Upscaling Tech | Upscaling support | FSR Upscaling / FSR 4 |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | AMD Anti-Lag |
Video Memory (VRAM)
The Iris Pro Graphics 580 has 0 MB of VRAM, while the Radeon R9 M385X carries 512 MB. Radeon R9 M385X gives you 100+% more memory capacity, which matters more once you move into heavier textures, mods, or higher resolutions. Memory bus width is System on the Iris Pro Graphics 580 and 128-bit on the Radeon R9 M385X.
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| VRAM Capacity | Shared System RAM | 0.5 GB |
| Memory Type | Shared | GDDR5 |
| Memory Bandwidth | System | Unknown |
| Bus Width | System | 128-bit |
Display & API Support
DirectX support: 12 (12_1) (Iris Pro Graphics 580) vs 12 (12_0) (Radeon R9 M385X). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 4.
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| DirectX | 12 (12_1) | 12 (12_0) |
| Vulkan | 1.2 | 1.2 |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 3 | 4+33% |
Media & Encoding
Hardware encoder: Quick Sync Video (Iris Pro Graphics 580) vs VCE 2.0 (Radeon R9 M385X). Decoder: Quick Sync Video vs UVD 4.2. Supported codecs: H.264,H.265,VP8,VP9 (Iris Pro Graphics 580) vs H.264,MPEG-4,VC-1,MPEG-2 (Radeon R9 M385X).
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| Encoder | Quick Sync Video | VCE 2.0 |
| Decoder | Quick Sync Video | UVD 4.2 |
| Codecs | H.264,H.265,VP8,VP9 | H.264,MPEG-4,VC-1,MPEG-2 |
Power & Dimensions
The Iris Pro Graphics 580 draws 45W versus the Radeon R9 M385X's 75W — a 50% difference. The Iris Pro Graphics 580 is more power-efficient. Recommended PSU: 0W (Iris Pro Graphics 580) vs 350W (Radeon R9 M385X). Power connectors: None vs Mobile. Card length: 0mm vs 0mm, occupying 0 vs 0 slots. Typical load temperature: 80 vs 85.
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| TDP | 45W-40% | 75W |
| Recommended PSU | 0W-100% | 350W |
| Power Connector | None | Mobile |
| Length | 0mm | 0mm |
| Height | 0mm | 0mm |
| Slots | 0 | 0 |
| Temp (Load) | 80-6% | 85 |
| Perf/Watt | 44.1+66% | 26.6 |
Value Analysis
At launch, the Iris Pro Graphics 580 came in at $0, while the Radeon R9 M385X launched at $300. On MSRP, Iris Pro Graphics 580 was 100+% cheaper ($300 less). Performance per dollar on MSRP (G3D Mark / MSRP): Infinity (Iris Pro Graphics 580) vs 6.6 (Radeon R9 M385X) — the Iris Pro Graphics 580 offers Infinity% better value.
| Feature | Iris Pro Graphics 580 | Radeon R9 M385X |
|---|---|---|
| MSRP | $0-100% | $300 |
| Performance per Dollar | Infinity | 6.6 |
| Codename | Skylake GT4e | Strato |
| Release | September 1 2015 | May 5 2015 |
| Ranking | #707 | #681 |
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