GeForce GT 645 vs Iris Pro Graphics P580
GeForce GT 645
Popular choices:
Iris Pro Graphics P580
Popular choices:
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 GeForce GT 645 is positioned at rank 242 and the Iris Pro Graphics P580 is on rank 326, 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 GeForce GT 645
Performance Per Dollar Iris Pro Graphics P580
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 | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-1%) | ✅Leading raw performance (+1%) |
| Longevity | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) | 🛑Obsolete Architecture (2015 / Generation 9.0 (2015−2016)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+100+%) | ❌ Less VRAM capacity |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| 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 | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| Cost Efficiency | ✅Better overall value (+296.1%) | ❌Lower cost efficiency |
| Upfront Cost | ✅More affordable ($15) | ⚠️Higher upfront cost ($60) |
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 GeForce GT 645 and Iris Pro Graphics P580
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.
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.
Graphics Performance
The GeForce GT 645 scores 2,006 and the Iris Pro Graphics P580 reaches 2,026 in the G3D Mark benchmark — just a 1% difference, making them near-identical in rasterization performance. The GeForce GT 645 is built on Kepler while the Iris Pro Graphics P580 uses Generation 9.0, both on 28 nm vs 14 nm+. Shader units: 384 (GeForce GT 645) vs 576 (Iris Pro Graphics P580). Raw compute: 0.5445 TFLOPS (GeForce GT 645) vs 1.21 TFLOPS (Iris Pro Graphics P580).
| Feature | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| G3D Mark Score | 2,006 | 2,026 |
| Architecture | Kepler | Generation 9.0 |
| Process Node | 28 nm | 14 nm+ |
| Shading Units | 384 | 576+50% |
| Compute (TFLOPS) | 0.5445 TFLOPS | 1.21 TFLOPS+122% |
| ROPs | 16+78% | 9 |
| TMUs | 32 | 72+125% |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| 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 GeForce GT 645 comes with 2 GB of VRAM, while the Iris Pro Graphics P580 has 0 MB. The GeForce GT 645 offers 100+% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs System.
| Feature | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| VRAM Capacity | 2 GB | Shared System RAM |
| Memory Type | GDDR5 | Shared |
| Memory Bandwidth | Unknown | System |
| Bus Width | 128-bit | System |
Power & Dimensions
The GeForce GT 645 draws 32W versus the Iris Pro Graphics P580's 15W — a 72.3% difference. The Iris Pro Graphics P580 is more power-efficient. Recommended PSU: 350W (GeForce GT 645) vs 1W (Iris Pro Graphics P580). Power connectors: PCIe-powered vs Integrated.
| Feature | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| TDP | 32W | 15W-53% |
| Recommended PSU | 350W | 1W-100% |
| Power Connector | PCIe-powered | Integrated |
| Length | 145mm | — |
| Height | 111mm | — |
| Slots | 1 | — |
| Temp (Load) | 80 | — |
| Perf/Watt | 62.7 | 135.1+115% |
Value Analysis
The GeForce GT 645 launched at $99 MSRP and currently averages $15, while the Iris Pro Graphics P580 launched at $150 and now averages $60. The GeForce GT 645 costs 75% less ($45 savings) at current market prices. Performance per dollar (G3D Mark / price): 133.7 (GeForce GT 645) vs 33.8 (Iris Pro Graphics P580) — the GeForce GT 645 offers 295.6% better value. The Iris Pro Graphics P580 is the newer GPU (2015 vs 2012).
| Feature | GeForce GT 645 | Iris Pro Graphics P580 |
|---|---|---|
| MSRP | $99-34% | $150 |
| Avg Price (30d) | $15-75% | $60 |
| Performance per Dollar | 133.7+296% | 33.8 |
| Codename | GK107 | Skylake GT4e |
| Release | October 1 2012 | September 1 2015 |
| Ranking | #903 | #678 |
Top Performing GPUs
The most powerful gpus ranked by G3D Mark benchmark scores.
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