GeForce GT 645 vs Iris Pro Graphics 580
GeForce GT 645
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Iris Pro Graphics 580
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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. The GeForce GT 645 is positioned at rank #242 in our cost-efficiency ranking, representing a Lower cost-benefit for your build. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar GeForce GT 645
Performance Per Dollar
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce GT 645 is the superior choice for raw performance. It leads with a 1.1% higher G3D Mark score and 100+% more VRAM (2 GB vs 0 MB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Iris Pro Graphics 580.
| Insight | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| Performance | ✅Leading raw performance (+1.1%) | ❌Lower raw frame rates (-1.1%) |
| 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 | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| Case Fit | 📏 Compact / SFF Friendly | — |
💎 Value Proposition
While current pricing data is unavailable, the GeForce GT 645 remains the clear technical winner. Check real-time availability to determine if the performance gap justifies the market price.
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 580
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 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.
Graphics Performance
The GeForce GT 645 scores 2,006 and the Iris Pro Graphics 580 reaches 1,985 in the G3D Mark benchmark — just a 1.1% difference, making them near-identical in rasterization performance. The GeForce GT 645 is built on Kepler while the Iris Pro Graphics 580 uses Generation 9.0, both on 28 nm vs 14 nm+. Shader units: 384 (GeForce GT 645) vs 576 (Iris Pro Graphics 580). Raw compute: 0.5445 TFLOPS (GeForce GT 645) vs 1.094 TFLOPS (Iris Pro Graphics 580).
| Feature | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| G3D Mark Score | 2,006+1% | 1,985 |
| Architecture | Kepler | Generation 9.0 |
| Process Node | 28 nm | 14 nm+ |
| Shading Units | 384 | 576+50% |
| Compute (TFLOPS) | 0.5445 TFLOPS | 1.094 TFLOPS+101% |
| ROPs | 16+78% | 9 |
| TMUs | 32 | 72+125% |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| 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 580 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 580 |
|---|---|---|
| VRAM Capacity | 2 GB | Shared System RAM |
| Memory Type | GDDR5 | Shared |
| Memory Bandwidth | Unknown | System |
| Bus Width | 128-bit | System |
Display & API Support
DirectX support: 12 (11_0) (GeForce GT 645) vs 12 (12_1) (Iris Pro Graphics 580). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 3.
| Feature | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| DirectX | 12 (11_0) | 12 (12_1) |
| Vulkan | 1.2 | 1.2 |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 3 | 3 |
Media & Encoding
Hardware encoder: NVENC (1st Gen) (GeForce GT 645) vs Quick Sync Video (Iris Pro Graphics 580). Decoder: NVDEC (1st Gen) vs Quick Sync Video. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 645) vs H.264,H.265,VP8,VP9 (Iris Pro Graphics 580).
| Feature | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| Encoder | NVENC (1st Gen) | Quick Sync Video |
| Decoder | NVDEC (1st Gen) | Quick Sync Video |
| Codecs | H.264,MPEG-2,VC-1 | H.264,H.265,VP8,VP9 |
Power & Dimensions
The GeForce GT 645 draws 32W versus the Iris Pro Graphics 580's 45W — a 33.8% difference. The GeForce GT 645 is more power-efficient. Recommended PSU: 350W (GeForce GT 645) vs 0W (Iris Pro Graphics 580). Power connectors: PCIe-powered vs None. Card length: 145mm vs 0mm, occupying 1 vs 0 slots. Typical load temperature: 80 vs 80.
| Feature | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| TDP | 32W-29% | 45W |
| Recommended PSU | 350W | 0W-100% |
| Power Connector | PCIe-powered | None |
| Length | 145mm | 0mm |
| Height | 111mm | 0mm |
| Slots | 1 | 0-100% |
| Temp (Load) | 80 | 80 |
| Perf/Watt | 62.7+42% | 44.1 |
Value Analysis
The GeForce GT 645 launched at $99 MSRP and currently averages $15, while the Iris Pro Graphics 580 launched at $0 and now averages $0. The Iris Pro Graphics 580 costs 100+% less ($15 savings) at current market prices. Performance per dollar (G3D Mark / price): 133.7 (GeForce GT 645) vs Infinity (Iris Pro Graphics 580) — the Iris Pro Graphics 580 offers Infinity% better value. The Iris Pro Graphics 580 is the newer GPU (2015 vs 2012).
| Feature | GeForce GT 645 | Iris Pro Graphics 580 |
|---|---|---|
| MSRP | $99 | $0-100% |
| Avg Price (30d) | $15 | $0-100% |
| Performance per Dollar | 133.7 | Infinity |
| Codename | GK107 | Skylake GT4e |
| Release | October 1 2012 | September 1 2015 |
| Ranking | #903 | #707 |
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