GeForce GT 640 Rev. 2 vs Radeon R7 A8-7690K
GeForce GT 640 Rev. 2
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Radeon R7 A8-7690K
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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 A8-7690K is on rank 97, 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 GeForce GT 640 Rev. 2
Performance Per Dollar Radeon R7 A8-7690K
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce GT 640 Rev. 2 is the superior choice for raw performance. It leads with a 2.4% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the Radeon R7 A8-7690K.
| Insight | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| Performance | ✅Leading raw performance (+2.4%) | ❌Lower raw frame rates (-2.4%) |
| 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 | 💡 Excellent Perf/Watt | ⚡ Higher Power Consumption |
| 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 $99), it costs 60% less, resulting in a 141.8% higher cost efficiency score.
| Insight | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+141.8%) |
| Upfront Cost | ⚠️Higher upfront cost ($99) | ✅More affordable ($40) |
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.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Technical Specifications
Side-by-side comparison of GeForce GT 640 Rev. 2 and Radeon R7 A8-7690K
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 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.
Graphics Performance
The GeForce GT 640 Rev. 2 scores 1,168 and the Radeon R7 A8-7690K reaches 1,141 in the G3D Mark benchmark — just a 2.4% difference, making them near-identical in rasterization performance. The GeForce GT 640 Rev. 2 is built on Kepler 2.0 while the Radeon R7 A8-7690K uses GCN 1.0, both on a 28 nm process. Shader units: 384 (GeForce GT 640 Rev. 2) vs 1,024 (Radeon R7 A8-7690K). Raw compute: 0.8033 TFLOPS (GeForce GT 640 Rev. 2) vs 1.997 TFLOPS (Radeon R7 A8-7690K).
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| G3D Mark Score | 1,168+2% | 1,141 |
| Architecture | Kepler 2.0 | GCN 1.0 |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384 | 1024+167% |
| Compute (TFLOPS) | 0.8033 TFLOPS | 1.997 TFLOPS+149% |
| ROPs | 8 | 32+300% |
| TMUs | 32 | 64+100% |
| L1 Cache | 32 KB | 256 KB+700% |
| L2 Cache | 128 KB | 512 KB+300% |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| 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 512 KB (Radeon R7 A8-7690K) — the Radeon R7 A8-7690K has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| 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 | 512 KB+300% |
Display & API Support
DirectX support: 12 (11_0) (GeForce GT 640 Rev. 2) vs 12 (Radeon R7 A8-7690K). Maximum simultaneous displays: 3 vs 0.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| DirectX | 12 (11_0) | 12 |
| Max Displays | 3 | 0 |
Media & Encoding
Hardware encoder: NVENC (Kepler) (GeForce GT 640 Rev. 2) vs VCE 2.0 (Radeon R7 A8-7690K). Decoder: PureVideo HD 5 vs UVD 4.2.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| Encoder | NVENC (Kepler) | VCE 2.0 |
| Decoder | PureVideo HD 5 | UVD 4.2 |
| Codecs | H.264,MPEG-2,VC-1 | — |
Power & Dimensions
The GeForce GT 640 Rev. 2 draws 49W versus the Radeon R7 A8-7690K's 100W — a 68.5% difference. The GeForce GT 640 Rev. 2 is more power-efficient. Recommended PSU: 300W (GeForce GT 640 Rev. 2) vs 350W (Radeon R7 A8-7690K). Power connectors: None vs None. Card length: 145mm vs 1mm, occupying 1 vs 0 slots.
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| TDP | 49W-51% | 100W |
| Recommended PSU | 300W-14% | 350W |
| Power Connector | None | None |
| Length | 145mm | 1mm |
| Height | 111mm | — |
| Slots | 1 | 0-100% |
| Temp (Load) | 65 | — |
| Perf/Watt | 23.8+109% | 11.4 |
Value Analysis
The GeForce GT 640 Rev. 2 launched at $99 MSRP and currently averages $99, while the Radeon R7 A8-7690K launched at $80 and now averages $40. The Radeon R7 A8-7690K costs 59.6% less ($59 savings) at current market prices. Performance per dollar (G3D Mark / price): 11.8 (GeForce GT 640 Rev. 2) vs 28.5 (Radeon R7 A8-7690K) — the Radeon R7 A8-7690K offers 141.5% better value. The Radeon R7 A8-7690K is the newer GPU (2015 vs 2013).
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| MSRP | $99 | $80-19% |
| Avg Price (30d) | $99 | $40-60% |
| Performance per Dollar | 11.8 | 28.5+142% |
| Codename | GK208 | Trinidad |
| Release | May 29 2013 | June 18 2015 |
| Ranking | #786 | #467 |
Top Performing GPUs
The most powerful gpus ranked by G3D Mark benchmark scores.
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