Iris Pro Graphics P580 vs GeForce GT 645
Iris Pro Graphics P580
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GeForce GT 645
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Performance Spectrum - GPU
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.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (G3D Mark) per dollar. Components placed above yours deliver better value for money. The Iris Pro Graphics P580 is positioned at rank 326 and the GeForce GT 645 is on rank 242, so the GeForce GT 645 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Iris Pro Graphics P580
Performance Per Dollar GeForce GT 645
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Iris Pro Graphics P580 is the superior choice for raw performance. It leads with a 1% higher G3D Mark score. However, the GeForce GT 645 offers more VRAM, which may be beneficial for texture-heavy scenarios at higher resolutions.
| Insight | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| Performance | ✅Leading raw performance (+1%) | ❌Lower raw frame rates (-1%) |
| Longevity | 🛑Obsolete Architecture (2015 / Generation 9.0 (2015−2016)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+100+%) |
| Efficiency | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | — | 📏 Compact / SFF Friendly |
💎 Value Proposition
The GeForce GT 645 offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the GeForce GT 645 holds the technical lead. Priced at $15 (vs $60), it costs 75% less, resulting in a 296.1% higher cost efficiency score.
| Insight | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+296.1%) |
| Upfront Cost | ⚠️Higher upfront cost ($60) | ✅More affordable ($15) |
Performance Check
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 7800X3D 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.
Technical Specifications
Side-by-side comparison of Iris Pro Graphics P580 and GeForce GT 645
Iris Pro Graphics P580
The Iris Pro Graphics P580 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 1050 MHz. It has 576 shading units. The thermal design power (TDP) is 15W. Manufactured using 14 nm+ process technology. G3D Mark benchmark score: 2,026 points.
GeForce GT 645
The GeForce GT 645 is manufactured by NVIDIA. It was released in October 1 2012. It features the Kepler architecture. The core clock speed is Up to 710 MHz. It has 384 shading units. The thermal design power (TDP) is 32W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 2,006 points.
Graphics Performance
The Iris Pro Graphics P580 scores 2,026 and the GeForce GT 645 reaches 2,006 in the G3D Mark benchmark — just a 1% difference, making them near-identical in rasterization performance. The Iris Pro Graphics P580 is built on Generation 9.0 while the GeForce GT 645 uses Kepler, both on 14 nm+ vs 28 nm. Shader units: 576 (Iris Pro Graphics P580) vs 384 (GeForce GT 645). Raw compute: 1.21 TFLOPS (Iris Pro Graphics P580) vs 0.5445 TFLOPS (GeForce GT 645).
| Feature | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| G3D Mark Score | 2,026 | 2,006 |
| Architecture | Generation 9.0 | Kepler |
| Process Node | 14 nm+ | 28 nm |
| Shading Units | 576+50% | 384 |
| Compute (TFLOPS) | 1.21 TFLOPS+122% | 0.5445 TFLOPS |
| ROPs | 9 | 16+78% |
| TMUs | 72+125% | 32 |
Advanced Features (DLSS/FSR)
| Feature | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | Standard |
Video Memory (VRAM)
The Iris Pro Graphics P580 comes with 0 MB of VRAM, while the GeForce GT 645 has 2 GB. The GeForce GT 645 offers 100+% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: System vs 128-bit.
| Feature | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| VRAM Capacity | Shared System RAM | 2 GB |
| Memory Type | Shared | GDDR5 |
| Memory Bandwidth | System | Unknown |
| Bus Width | System | 128-bit |
Power & Dimensions
The Iris Pro Graphics P580 draws 15W versus the GeForce GT 645's 32W — a 72.3% difference. The Iris Pro Graphics P580 is more power-efficient. Recommended PSU: 1W (Iris Pro Graphics P580) vs 350W (GeForce GT 645). Power connectors: Integrated vs PCIe-powered.
| Feature | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| TDP | 15W-53% | 32W |
| Recommended PSU | 1W-100% | 350W |
| Power Connector | Integrated | PCIe-powered |
| Length | — | 145mm |
| Height | — | 111mm |
| Slots | — | 1 |
| Temp (Load) | — | 80 |
| Perf/Watt | 135.1+115% | 62.7 |
Value Analysis
The Iris Pro Graphics P580 launched at $150 MSRP and currently averages $60, while the GeForce GT 645 launched at $99 and now averages $15. The GeForce GT 645 costs 75% less ($45 savings) at current market prices. Performance per dollar (G3D Mark / price): 33.8 (Iris Pro Graphics P580) vs 133.7 (GeForce GT 645) — the GeForce GT 645 offers 295.6% better value. The Iris Pro Graphics P580 is the newer GPU (2015 vs 2012).
| Feature | Iris Pro Graphics P580 | GeForce GT 645 |
|---|---|---|
| MSRP | $150 | $99-34% |
| Avg Price (30d) | $60 | $15-75% |
| Performance per Dollar | 33.8 | 133.7+296% |
| Codename | Skylake GT4e | GK107 |
| Release | September 1 2015 | October 1 2012 |
| Ranking | #678 | #903 |
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The most powerful gpus ranked by G3D Mark benchmark scores.
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