Radeon R7 A8-7690K vs GeForce GT 640
Radeon R7 A8-7690K
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GeForce GT 640
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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 Radeon R7 A8-7690K is positioned at rank 97 and the GeForce GT 640 is on rank 107, so the Radeon R7 A8-7690K offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Radeon R7 A8-7690K
Performance Per Dollar GeForce GT 640
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce GT 640 is the superior choice for raw performance. It leads with a 2.5% higher G3D Mark score and 700% more VRAM (4 GB vs 512 MB). This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon R7 A8-7690K.
| Insight | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| Performance | ❌Lower raw frame rates (-2.5%) | ✅Leading raw performance (+2.5%) |
| Longevity | 🛑Obsolete Architecture (2015 / GCN 1.0 (2012−2020)) | 🛑Obsolete Architecture (2012 / Kepler (2012−2018)) |
| Ecosystem | Supports FSR Upscaling | Supports FSR Upscaling |
| VRAM | ❌ Less VRAM capacity | ✅ More VRAM (+700%) |
| Efficiency | ⚡ Higher Power Consumption | 💡 Excellent Perf/Watt |
| Case Fit | 📏 Compact / SFF Friendly | 📏 Compact / SFF Friendly |
💎 Value Proposition
The Radeon R7 A8-7690K offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the Radeon R7 A8-7690K holds the technical lead. Priced at $40 (vs $50), it costs 20% less, resulting in a 22% higher cost efficiency score.
| Insight | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| Cost Efficiency | ✅Better overall value (+22%) | ❌Lower cost efficiency |
| Upfront Cost | ✅More affordable ($40) | ⚠️Higher upfront cost ($50) |
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 R7 A8-7690K and GeForce GT 640
Radeon R7 A8-7690K
The Radeon R7 A8-7690K is manufactured by AMD. It was released in June 18 2015. It features the GCN 1.0 architecture. The boost clock speed is 975 MHz. It has 1024 shading units. The thermal design power (TDP) is 100W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,141 points. Launch price was $149.
GeForce GT 640
The GeForce GT 640 is manufactured by NVIDIA. It was released in June 5 2012. It features the Kepler architecture. The core clock speed is 902 MHz. It has 384 shading units. The thermal design power (TDP) is 65W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,169 points. Launch price was $99.
Graphics Performance
The Radeon R7 A8-7690K scores 1,141 and the GeForce GT 640 reaches 1,169 in the G3D Mark benchmark — just a 2.5% difference, making them near-identical in rasterization performance. The Radeon R7 A8-7690K is built on GCN 1.0 while the GeForce GT 640 uses Kepler, both on a 28 nm process. Shader units: 1,024 (Radeon R7 A8-7690K) vs 384 (GeForce GT 640). Raw compute: 1.997 TFLOPS (Radeon R7 A8-7690K) vs 0.6927 TFLOPS (GeForce GT 640).
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| G3D Mark Score | 1,141 | 1,169+2% |
| Architecture | GCN 1.0 | Kepler |
| Process Node | 28 nm | 28 nm |
| Shading Units | 1024+167% | 384 |
| Compute (TFLOPS) | 1.997 TFLOPS+188% | 0.6927 TFLOPS |
| ROPs | 32+100% | 16 |
| TMUs | 64+100% | 32 |
| L1 Cache | 256 KB+700% | 32 KB |
| L2 Cache | 512 KB+100% | 256 KB |
Advanced Features (DLSS/FSR)
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| 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 R7 A8-7690K comes with 512 MB of VRAM, while the GeForce GT 640 has 4 GB. The GeForce GT 640 offers 700% more capacity, crucial for higher resolutions and texture-heavy games. Bus width: 128-bit vs 128-bit. L2 Cache: 512 KB (Radeon R7 A8-7690K) vs 256 KB (GeForce GT 640) — the Radeon R7 A8-7690K has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| VRAM Capacity | 0.5 GB | 4 GB+700% |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 512 KB+100% | 256 KB |
Display & API Support
DirectX support: 12 (Radeon R7 A8-7690K) vs 11.0 (GeForce GT 640). Maximum simultaneous displays: 0 vs 3.
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| DirectX | 12+9% | 11.0 |
| Max Displays | 0 | 3 |
Media & Encoding
Hardware encoder: VCE 2.0 (Radeon R7 A8-7690K) vs NVENC 1.0 (GeForce GT 640). Decoder: UVD 4.2 vs PureVideo HD VP5.
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| Encoder | VCE 2.0 | NVENC 1.0 |
| Decoder | UVD 4.2 | PureVideo HD VP5 |
| Codecs | — | MPEG-2,H.264,VC-1,MPEG-4 ASP |
Power & Dimensions
The Radeon R7 A8-7690K draws 100W versus the GeForce GT 640's 65W — a 42.4% difference. The GeForce GT 640 is more power-efficient. Recommended PSU: 350W (Radeon R7 A8-7690K) vs 300W (GeForce GT 640). Power connectors: None vs None. Card length: 1mm vs 145mm, occupying 0 vs 1 slots.
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| TDP | 100W | 65W-35% |
| Recommended PSU | 350W | 300W-14% |
| Power Connector | None | None |
| Length | 1mm | 145mm |
| Height | — | 111mm |
| Slots | 0-100% | 1 |
| Temp (Load) | — | 60°C |
| Perf/Watt | 11.4 | 18.0+58% |
Value Analysis
The Radeon R7 A8-7690K launched at $80 MSRP and currently averages $40, while the GeForce GT 640 launched at $99 and now averages $50. The Radeon R7 A8-7690K costs 20% less ($10 savings) at current market prices. Performance per dollar (G3D Mark / price): 28.5 (Radeon R7 A8-7690K) vs 23.4 (GeForce GT 640) — the Radeon R7 A8-7690K offers 21.8% better value. The Radeon R7 A8-7690K is the newer GPU (2015 vs 2012).
| Feature | Radeon R7 A8-7690K | GeForce GT 640 |
|---|---|---|
| MSRP | $80-19% | $99 |
| Avg Price (30d) | $40-20% | $50 |
| Performance per Dollar | 28.5+22% | 23.4 |
| Codename | Trinidad | GK107 |
| Release | June 18 2015 | June 5 2012 |
| Ranking | #467 | #837 |
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The most powerful gpus ranked by G3D Mark benchmark scores.
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