Radeon HD 4870 vs Iris Plus Graphics 645
Radeon HD 4870
Popular choices:
Iris Plus Graphics 645
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. The Radeon HD 4870 is positioned at rank #241 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 Radeon HD 4870
Performance Per Dollar
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
⚠️ Generational Difference
The Iris Plus Graphics 645 is significantly newer (2019 vs 2008). The Iris Plus Graphics 645 likely supports modern features like Ray Tracing, Tensor Cores, and DLSS/FSR upscaling, which act as force multipliers for performance. The Radeon HD 4870 lacks this hardware feature set, limiting its longevity in modern titles despite any raw power similarities.
🚀 Performance Leadership
The Iris Plus Graphics 645 is the superior choice for raw performance. It leads with a 4.6% higher G3D Mark score. However, the Radeon HD 4870 offers more VRAM, which may be beneficial for texture-heavy scenarios at higher resolutions.
| Insight | Radeon HD 4870 | Iris Plus Graphics 645 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-4.6%) | ✅Leading raw performance (+4.6%) |
| Longevity | 🛑Obsolete Architecture (2008 / TeraScale (2005−2013)) | Generation 9.5 (2016−2020) (14nm) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ✅ More VRAM (+100+%) | ❌ Less VRAM capacity |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | — | — |
💎 Value Proposition
While current pricing data is unavailable, the Iris Plus Graphics 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 Radeon HD 4870 and Iris Plus Graphics 645
Radeon HD 4870
The Radeon HD 4870 is manufactured by AMD. It was released in June 25 2008. It features the TeraScale architecture. The core clock speed is 750 MHz. It has 800 shading units. The thermal design power (TDP) is 150W. Manufactured using 55 nm process technology. G3D Mark benchmark score: 1,386 points. Launch price was $299.
Iris Plus Graphics 645
The Iris Plus Graphics 645 is manufactured by Intel. It was released in October 7 2019. It features the Generation 9.5 architecture. The core clock ranges from 300 MHz to 1050 MHz. It has 384 shading units. The thermal design power (TDP) is 15W. Manufactured using 14 nm+++ process technology. G3D Mark benchmark score: 1,450 points.
Graphics Performance
The Radeon HD 4870 scores 1,386 and the Iris Plus Graphics 645 reaches 1,450 in the G3D Mark benchmark — just a 4.6% difference, making them near-identical in rasterization performance. The Radeon HD 4870 is built on TeraScale while the Iris Plus Graphics 645 uses Generation 9.5, both on 55 nm vs 14 nm+++. Shader units: 800 (Radeon HD 4870) vs 384 (Iris Plus Graphics 645). Raw compute: 1.2 TFLOPS (Radeon HD 4870) vs 0.8064 TFLOPS (Iris Plus Graphics 645).
| Feature | Radeon HD 4870 | Iris Plus Graphics 645 |
|---|---|---|
| G3D Mark Score | 1,386 | 1,450+5% |
| Architecture | TeraScale | Generation 9.5 |
| Process Node | 55 nm | 14 nm+++ |
| Shading Units | 800+108% | 384 |
| Compute (TFLOPS) | 1.2 TFLOPS+49% | 0.8064 TFLOPS |
| ROPs | 16+167% | 6 |
| TMUs | 40 | 48+20% |
Advanced Features (DLSS/FSR)
| Feature | Radeon HD 4870 | Iris Plus Graphics 645 |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | AMD Anti-Lag | Standard |
Video Memory (VRAM)
The Radeon HD 4870 comes with 2 GB of VRAM, while the Iris Plus Graphics 645 has 0 MB. The Radeon HD 4870 offers 100+% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 64-bit vs System.
| Feature | Radeon HD 4870 | Iris Plus Graphics 645 |
|---|---|---|
| VRAM Capacity | 2 GB | Shared System RAM |
| Memory Type | GDDR5 | Shared |
| Memory Bandwidth | Unknown | System |
| Bus Width | 64-bit | System |
Power & Dimensions
The Radeon HD 4870 draws 150W versus the Iris Plus Graphics 645's 15W — a 163.6% difference. The Iris Plus Graphics 645 is more power-efficient. Recommended PSU: 500W (Radeon HD 4870) vs 1W (Iris Plus Graphics 645). Power connectors: 2x 6-pin vs Integrated.
| Feature | Radeon HD 4870 | Iris Plus Graphics 645 |
|---|---|---|
| TDP | 150W | 15W-90% |
| Recommended PSU | 500W | 1W-100% |
| Power Connector | 2x 6-pin | Integrated |
| Perf/Watt | 9.2 | 96.7+951% |
Value Analysis
The Radeon HD 4870 launched at $299 MSRP and currently averages $25, while the Iris Plus Graphics 645 launched at $0 and now averages $0. The Iris Plus Graphics 645 costs 100+% less ($25 savings) at current market prices. Performance per dollar (G3D Mark / price): 55.4 (Radeon HD 4870) vs Infinity (Iris Plus Graphics 645) — the Iris Plus Graphics 645 offers Infinity% better value. The Iris Plus Graphics 645 is the newer GPU (2019 vs 2008).
| Feature | Radeon HD 4870 | Iris Plus Graphics 645 |
|---|---|---|
| MSRP | $299 | $0-100% |
| Avg Price (30d) | $25 | $0-100% |
| Performance per Dollar | 55.4 | Infinity |
| Codename | RV770 | Coffee Lake GT3e |
| Release | June 25 2008 | October 7 2019 |
| Ranking | #784 | #720 |
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