Radeon R7 A8-7690K vs GeForce 840A
Radeon R7 A8-7690K
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GeForce 840A
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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 840A is on rank 349, 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 840A
Performance Comparison
About G3D Mark🏆 Chipversus Verdict
🚀 Performance Leadership
The Radeon R7 A8-7690K is the superior choice for raw performance. It leads with a 2.3% higher G3D Mark score. This advantage makes it significantly better for higher resolutions (1440p/4K) and graphic-intensive titles compared to the GeForce 840A.
| Insight | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| Performance | ✅Leading raw performance (+2.3%) | ❌Lower raw frame rates (-2.3%) |
| Longevity | 🛑Obsolete Architecture (2015 / GCN 1.0 (2012−2020)) | 🛑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 840A offers a compelling cost-to-performance ratio. While both GPUs are considered legacy components by modern standards, the GeForce 840A holds the technical lead. Priced at $25 (vs $40), it costs 38% less, resulting in a 56.4% higher cost efficiency score.
| Insight | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| Cost Efficiency | ❌Lower cost efficiency | ✅Better overall value (+56.4%) |
| Upfront Cost | ⚠️Higher upfront cost ($40) | ✅More affordable ($25) |
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 840A
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 840A
The GeForce 840A is manufactured by NVIDIA. It was released in March 17 2014. It features the Maxwell architecture. The core clock ranges from 1029 MHz to 1124 MHz. It has 384 shading units. The thermal design power (TDP) is 33W. Manufactured using 28 nm process technology. G3D Mark benchmark score: 1,115 points.
Graphics Performance
The Radeon R7 A8-7690K scores 1,141 and the GeForce 840A reaches 1,115 in the G3D Mark benchmark — just a 2.3% difference, making them near-identical in rasterization performance. The Radeon R7 A8-7690K is built on GCN 1.0 while the GeForce 840A uses Maxwell, both on a 28 nm process. Shader units: 1,024 (Radeon R7 A8-7690K) vs 384 (GeForce 840A). Raw compute: 1.997 TFLOPS (Radeon R7 A8-7690K) vs 0.8632 TFLOPS (GeForce 840A). Boost clocks: 975 MHz vs 1124 MHz.
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| G3D Mark Score | 1,141+2% | 1,115 |
| Architecture | GCN 1.0 | Maxwell |
| Process Node | 28 nm | 28 nm |
| Shading Units | 1024+167% | 384 |
| Compute (TFLOPS) | 1.997 TFLOPS+131% | 0.8632 TFLOPS |
| Boost Clock | 975 MHz | 1124 MHz+15% |
| ROPs | 32+300% | 8 |
| TMUs | 64+300% | 16 |
| L1 Cache | 256 KB+33% | 192 KB |
| L2 Cache | 0.5 MB | 1 MB+100% |
Advanced Features (DLSS/FSR)
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| 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)
Both cards feature 512 MB of GDDR5. Bus width: 128-bit vs 128-bit. L2 Cache: 0.5 MB (Radeon R7 A8-7690K) vs 1 MB (GeForce 840A) — the GeForce 840A has significantly larger on-die cache to reduce VRAM reliance.
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| VRAM Capacity | 0.5 GB | 0.5 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 0.5 MB | 1 MB+100% |
Display & API Support
DirectX support: 12 (Radeon R7 A8-7690K) vs 12 (11_0) (GeForce 840A). Maximum simultaneous displays: 0 vs 3.
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| DirectX | 12 | 12 (11_0) |
| Max Displays | 0 | 3 |
Media & Encoding
Hardware encoder: VCE 2.0 (Radeon R7 A8-7690K) vs NVENC (Maxwell) (GeForce 840A). Decoder: UVD 4.2 vs NVDEC (Maxwell).
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| Encoder | VCE 2.0 | NVENC (Maxwell) |
| Decoder | UVD 4.2 | NVDEC (Maxwell) |
| Codecs | — | H.264,VC-1,MPEG-2 |
Power & Dimensions
The Radeon R7 A8-7690K draws 100W versus the GeForce 840A's 33W — a 100.8% difference. The GeForce 840A is more power-efficient. Recommended PSU: 350W (Radeon R7 A8-7690K) vs 350W (GeForce 840A). Power connectors: None vs Legacy.
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| TDP | 100W | 33W-67% |
| Recommended PSU | 350W | 350W |
| Power Connector | None | Legacy |
| Length | 1mm | — |
| Slots | 0 | — |
| Temp (Load) | — | 75°C |
| Perf/Watt | 11.4 | 33.8+196% |
Value Analysis
The Radeon R7 A8-7690K launched at $80 MSRP and currently averages $40, while the GeForce 840A launched at $100 and now averages $25. The GeForce 840A costs 37.5% less ($15 savings) at current market prices. Performance per dollar (G3D Mark / price): 28.5 (Radeon R7 A8-7690K) vs 44.6 (GeForce 840A) — the GeForce 840A offers 56.5% better value. The Radeon R7 A8-7690K is the newer GPU (2015 vs 2014).
| Feature | Radeon R7 A8-7690K | GeForce 840A |
|---|---|---|
| MSRP | $80-20% | $100 |
| Avg Price (30d) | $40 | $25-38% |
| Performance per Dollar | 28.5 | 44.6+56% |
| Codename | Trinidad | GM108 |
| Release | June 18 2015 | March 17 2014 |
| Ranking | #467 | #850 |
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