GeForce GT 640 Rev. 2 vs Radeon R7 +8G
GeForce GT 640 Rev. 2
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Radeon R7 +8G
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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 GeForce GT 640 Rev. 2 is positioned at rank 109 and the Radeon R7 +8G is on rank 217, so the GeForce GT 640 Rev. 2 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 640 Rev. 2
Performance Per Dollar Radeon R7 +8G
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Radeon R7 +8G is the superior choice for raw performance. It leads with a 2% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce GT 640 Rev. 2.
| Insight | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| Performance | ❌Lower raw frame rates (-2%) | ✅Leading raw performance (+2%) |
| Longevity | 🛑Obsolete Architecture (2013 / Kepler 2.0 (2013−2015)) | 🛑Obsolete Architecture (2015 / GCN 1.0 (2012−2020)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+0%) |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | 📏 Compact / SFF Friendly | 📏 Compact / SFF Friendly |
💎 Value Proposition
The Radeon R7 +8G offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the Radeon R7 +8G holds the technical lead. Priced at $20 (vs $99), it costs 80% less, resulting in a 404.7% higher cost efficiency score.
| Insight | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+404.7%) |
| Upfront Cost | ⚠️Higher upfront cost ($99) | ✅More affordable ($20) |
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 640 Rev. 2 and Radeon R7 +8G
GeForce GT 640 Rev. 2
The GeForce GT 640 Rev. 2 is manufactured by NVIDIA. It was released in May 29 2013. It features the Kepler 2.0 architecture. The core clock speed is 1046 MHz. It has 384 shading units. The thermal design power (TDP) is 49W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,168 points. Launch price was $89.
Radeon R7 +8G
The Radeon R7 +8G is manufactured by AMD. It was released in May 5 2015. It features the GCN 1.0 architecture. The core clock ranges from 900 MHz to 915 MHz. It has 640 shading units. The thermal design power (TDP) is 30W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,191 points.
Graphics Performance
The GeForce GT 640 Rev. 2 scores 1,168 and the Radeon R7 +8G reaches 1,191 in the G3D Mark benchmark — just a 2% difference, making them near-identical in rasterization performance. The GeForce GT 640 Rev. 2 is built on Kepler 2.0 while the Radeon R7 +8G uses GCN 1.0, both on a 28 nm process. Shader units: 384 (GeForce GT 640 Rev. 2) vs 640 (Radeon R7 +8G). Raw compute: 0.8033 TFLOPS (GeForce GT 640 Rev. 2) vs 1.171 TFLOPS (Radeon R7 +8G).
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| G3D Mark Score | 1,168 | 1,191+2% |
| Architecture | Kepler 2.0 | GCN 1.0 |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384 | 640+67% |
| Compute (TFLOPS) | 0.8033 TFLOPS | 1.171 TFLOPS+46% |
| ROPs | 8 | 16+100% |
| TMUs | 32 | 40+25% |
| L1 Cache | 32 KB | 160 KB+400% |
| L2 Cache | 128 KB | 256 KB+100% |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| Upscaling Tech | FSR 1.0 (Software) | FSR 1.0 (Software) |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | Standard | AMD Anti-Lag |
Video Memory (VRAM)
Both cards feature 512 MB of GDDR5. Bus width: 64-bit vs 128-bit. L2 Cache: 128 KB (GeForce GT 640 Rev. 2) vs 256 KB (Radeon R7 +8G) — the Radeon R7 +8G has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| VRAM Capacity | 0.5 GB | 0.5 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 64-bit | 128-bit+100% |
| L2 Cache | 128 KB | 256 KB+100% |
Display & API Support
DirectX support: 12 (11_0) (GeForce GT 640 Rev. 2) vs 12 (11_1) (Radeon R7 +8G). Vulkan: 1.2 vs 1.2. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 2.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| DirectX | 12 (11_0) | 12 (11_1) |
| Vulkan | 1.2 | 1.2 |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 3+50% | 2 |
Media & Encoding
Hardware encoder: NVENC (Kepler) (GeForce GT 640 Rev. 2) vs VCE 2.0 (Radeon R7 +8G). Decoder: PureVideo HD 5 vs UVD 4.0. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 640 Rev. 2) vs H.264,MPEG-4,VC-1,MPEG-2 (Radeon R7 +8G).
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| Encoder | NVENC (Kepler) | VCE 2.0 |
| Decoder | PureVideo HD 5 | UVD 4.0 |
| Codecs | H.264,MPEG-2,VC-1 | H.264,MPEG-4,VC-1,MPEG-2 |
Power & Dimensions
The GeForce GT 640 Rev. 2 draws 49W versus the Radeon R7 +8G's 30W — a 48.1% difference. The Radeon R7 +8G is more power-efficient. Recommended PSU: 300W (GeForce GT 640 Rev. 2) vs 350W (Radeon R7 +8G). Power connectors: None vs PCIe-powered. Card length: 145mm vs 168mm, occupying 1 vs 1 slots. Typical load temperature: 65 vs 75.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| TDP | 49W | 30W-39% |
| Recommended PSU | 300W-14% | 350W |
| Power Connector | None | PCIe-powered |
| Length | 145mm | 168mm |
| Height | 111mm | 111mm |
| Slots | 1 | 1 |
| Temp (Load) | 65-13% | 75 |
| Perf/Watt | 23.8 | 39.7+67% |
Value Analysis
The GeForce GT 640 Rev. 2 launched at $99 MSRP and currently averages $99, while the Radeon R7 +8G launched at $49 and now averages $20. The Radeon R7 +8G costs 79.8% less ($79 savings) at current market prices. Performance per dollar (G3D Mark / price): 11.8 (GeForce GT 640 Rev. 2) vs 59.5 (Radeon R7 +8G) — the Radeon R7 +8G offers 404.2% better value. The Radeon R7 +8G is the newer GPU (2015 vs 2013).
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 +8G |
|---|---|---|
| MSRP | $99 | $49-51% |
| Avg Price (30d) | $99 | $20-80% |
| Performance per Dollar | 11.8 | 59.5+404% |
| Codename | GK208 | Tropo |
| Release | May 29 2013 | May 5 2015 |
| Ranking | #786 | #737 |
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The most powerful gpus ranked by G3D Mark benchmark scores.
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