GeForce GT 640 Rev. 2 vs GeForce 830A
GeForce GT 640 Rev. 2
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GeForce 830A
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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 GeForce 830A is on rank 344, 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 GeForce 830A
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The GeForce 830A is the superior choice for raw performance. It leads with a 0.4% 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 | GeForce 830A |
|---|---|---|
| Performance | ❌Lower raw frame rates (-0.4%) | ✅Leading raw performance (+0.4%) |
| Longevity | 🛑Obsolete Architecture (2013 / Kepler 2.0 (2013−2015)) | 🛑Obsolete Architecture (2014 / Maxwell (2014−2017)) |
| 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 | — |
💎 Value Proposition
The GeForce 830A offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the GeForce 830A holds the technical lead. Priced at $30 (vs $99), it costs 70% less, resulting in a 231.4% higher cost efficiency score.
| Insight | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+231.4%) |
| Upfront Cost | ⚠️Higher upfront cost ($99) | ✅More affordable ($30) |
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 GeForce 830A
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.
GeForce 830A
The GeForce 830A is manufactured by NVIDIA. It was released in July 22 2014. It features the Maxwell architecture. The core clock ranges from 1082 MHz to 1150 MHz. It has 256 shading units. The thermal design power (TDP) is 33W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,173 points.
Graphics Performance
The GeForce GT 640 Rev. 2 scores 1,168 and the GeForce 830A reaches 1,173 in the G3D Mark benchmark — just a 0.4% difference, making them near-identical in rasterization performance. The GeForce GT 640 Rev. 2 is built on Kepler 2.0 while the GeForce 830A uses Maxwell, both on a 28 nm process. Shader units: 384 (GeForce GT 640 Rev. 2) vs 256 (GeForce 830A). Raw compute: 0.8033 TFLOPS (GeForce GT 640 Rev. 2) vs 0.5888 TFLOPS (GeForce 830A).
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| G3D Mark Score | 1,168 | 1,173 |
| Architecture | Kepler 2.0 | Maxwell |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384+50% | 256 |
| Compute (TFLOPS) | 0.8033 TFLOPS+36% | 0.5888 TFLOPS |
| ROPs | 8 | 8 |
| TMUs | 32+100% | 16 |
| L1 Cache | 32 KB | 128 KB+300% |
| L2 Cache | 0.13 MB | 1 MB+669% |
Advanced Features (DLSS/FSR)
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| 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)
Both cards feature 512 MB of GDDR5. Bus width: 64-bit vs 128-bit. L2 Cache: 0.13 MB (GeForce GT 640 Rev. 2) vs 1 MB (GeForce 830A) — the GeForce 830A has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| 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 | 0.13 MB | 1 MB+669% |
Display & API Support
DirectX support: 12 (11_0) (GeForce GT 640 Rev. 2) vs 12 (11_0) (GeForce 830A). Vulkan: 1.2 vs 1.1. OpenGL: 4.6 vs 4.6. Maximum simultaneous displays: 3 vs 2.
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| DirectX | 12 (11_0) | 12 (11_0) |
| Vulkan | 1.2+9% | 1.1 |
| OpenGL | 4.6 | 4.6 |
| Max Displays | 3+50% | 2 |
Media & Encoding
Hardware encoder: NVENC (Kepler) (GeForce GT 640 Rev. 2) vs NVENC 3.0 (GeForce 830A). Decoder: PureVideo HD 5 vs VP6. Supported codecs: H.264,MPEG-2,VC-1 (GeForce GT 640 Rev. 2) vs H.264,MPEG-2,VC-1 (GeForce 830A).
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| Encoder | NVENC (Kepler) | NVENC 3.0 |
| Decoder | PureVideo HD 5 | VP6 |
| Codecs | H.264,MPEG-2,VC-1 | H.264,MPEG-2,VC-1 |
Power & Dimensions
The GeForce GT 640 Rev. 2 draws 49W versus the GeForce 830A's 33W — a 39% difference. The GeForce 830A is more power-efficient. Recommended PSU: 300W (GeForce GT 640 Rev. 2) vs 350W (GeForce 830A). Power connectors: None vs Legacy. Card length: 145mm vs 0mm, occupying 1 vs 0 slots. Typical load temperature: 65 vs 80.
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| TDP | 49W | 33W-33% |
| Recommended PSU | 300W-14% | 350W |
| Power Connector | None | Legacy |
| Length | 145mm | 0mm |
| Height | 111mm | 0mm |
| Slots | 1 | 0-100% |
| Temp (Load) | 65-19% | 80 |
| Perf/Watt | 23.8 | 35.5+49% |
Value Analysis
The GeForce GT 640 Rev. 2 launched at $99 MSRP and currently averages $99, while the GeForce 830A launched at $100 and now averages $30. The GeForce 830A costs 69.7% less ($69 savings) at current market prices. Performance per dollar (G3D Mark / price): 11.8 (GeForce GT 640 Rev. 2) vs 39.1 (GeForce 830A) — the GeForce 830A offers 231.4% better value. The GeForce 830A is the newer GPU (2014 vs 2013).
| Feature | GeForce GT 640 Rev. 2 | GeForce 830A |
|---|---|---|
| MSRP | $99-1% | $100 |
| Avg Price (30d) | $99 | $30-70% |
| Performance per Dollar | 11.8 | 39.1+231% |
| Codename | GK208 | GM108 |
| Release | May 29 2013 | July 22 2014 |
| Ranking | #786 | #832 |
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