GeForce 840A
Radeon R7 A8-7690K
GeForce 840A vs Radeon R7 A8-7690K Performance Spectrum
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.
GeForce 840A vs Radeon R7 A8-7690K FPS Benchmarks
Predicted gaming performance across popular games. Tested paired with Ryzen 7 9800X3D to isolate GPU performance.
Search any supported game below to compare 1080p FPS for both components.
Path of Exile 2
Counter-Strike 2
League of Legends
Valorant
Among Us
Apex Legends
ARC Raiders
Baldur's Gate 3
Call of Duty: Black Ops 6
GeForce 840A vs Radeon R7 A8-7690K: Pros, Cons & Final Verdict
See where each GPU makes more sense in practice: raw FPS, VRAM, features, power draw, pricing, and long-term headroom.
GeForce 840A
2014Why buy it
- ✅Draws 33W instead of 100W, a 67W reduction.
Trade-offs
- ❌Lower average FPS than Radeon R7 A8-7690K across 50 tracked games in our benchmark data.
- ❌2014 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌25% HIGHER MSRP$100 MSRPvs$80 MSRP
- ❌Lower G3D Mark per dollar, at 11.2 vs 14.3 G3D/$ ($100 MSRP vs $80 MSRP).
Radeon R7 A8-7690K
2015Why buy it
- ✅42.0% more average FPS across 50 tracked games in our benchmark data.
- ✅Costs $20 less on MSRP ($80 MSRP vs $100 MSRP).
- ✅Delivers 27.9% more G3D Mark for each dollar spent, at 14.3 vs 11.2 G3D/$ ($80 MSRP vs $100 MSRP).
Trade-offs
- ❌2015 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌203% higher power demand at 100W vs 33W.
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GeForce 840A vs Radeon R7 A8-7690K Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
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.
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 840A scores 1,115 and the Radeon R7 A8-7690K reaches 1,141 in the G3D Mark benchmark — just a 2.3% difference, making them near-identical in rasterization performance. The GeForce 840A is built on Maxwell while the Radeon R7 A8-7690K uses GCN 1.0, both on a 28 nm process. Shader units: 384 (GeForce 840A) vs 1,024 (Radeon R7 A8-7690K). Raw compute: 0.8632 TFLOPS (GeForce 840A) vs 1.997 TFLOPS (Radeon R7 A8-7690K). Boost clocks: 1124 MHz vs 975 MHz.
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| G3D Mark Score | 1,115 | 1,141+2% |
| Architecture | Maxwell | GCN 1.0 |
| Process Node | 28 nm | 28 nm |
| Shading Units | 384 | 1024+167% |
| Compute (TFLOPS) | 0.8632 TFLOPS | 1.997 TFLOPS+131% |
| Boost Clock | 1124 MHz+15% | 975 MHz |
| ROPs | 8 | 32+300% |
| TMUs | 16 | 64+300% |
| L1 Cache | 192 KB | 256 KB+33% |
| L2 Cache | 1 MB+100% | 0.5 MB |
Advanced Features (DLSS/FSR)
The GeForce 840A gets NVIDIA DLSS, which still tends to look cleaner in motion. The Radeon R7 A8-7690K leans on FSR, which is flexible and widely supported, but usually a bit rougher at the same settings.
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| Upscaling Tech | Upscaling support | FSR Upscaling / FSR 4 |
| Frame Generation | Not Supported | Not Supported |
| Ray Reconstruction | No | No |
| Low Latency | NVIDIA Reflex | AMD Anti-Lag |
Video Memory (VRAM)
Both cards ship with 512 MB of GDDR5. Memory bus width is 128-bit on the GeForce 840A and 128-bit on the Radeon R7 A8-7690K. L2 Cache: 1 MB (GeForce 840A) vs 0.5 MB (Radeon R7 A8-7690K) — the GeForce 840A has significantly larger on-die cache to reduce VRAM reliance.
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| VRAM Capacity | 0.5 GB | 0.5 GB |
| Memory Type | GDDR5 | GDDR5 |
| Memory Bandwidth | Unknown | Unknown |
| Bus Width | 128-bit | 128-bit |
| L2 Cache | 1 MB+100% | 0.5 MB |
Display & API Support
DirectX support: 12 (11_0) (GeForce 840A) vs 12 (Radeon R7 A8-7690K). Maximum simultaneous displays: 3 vs 0.
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| DirectX | 12 (11_0) | 12 |
| Max Displays | 3 | 0 |
Media & Encoding
Hardware encoder: NVENC (Maxwell) (GeForce 840A) vs VCE 2.0 (Radeon R7 A8-7690K). Decoder: NVDEC (Maxwell) vs UVD 4.2.
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| Encoder | NVENC (Maxwell) | VCE 2.0 |
| Decoder | NVDEC (Maxwell) | UVD 4.2 |
| Codecs | H.264,VC-1,MPEG-2 | — |
Power & Dimensions
The GeForce 840A draws 33W versus the Radeon R7 A8-7690K's 100W — a 100.8% difference. The GeForce 840A is more power-efficient. Recommended PSU: 350W (GeForce 840A) vs 350W (Radeon R7 A8-7690K). Power connectors: Legacy vs None.
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| TDP | 33W-67% | 100W |
| Recommended PSU | 350W | 350W |
| Power Connector | Legacy | None |
| Length | — | 1mm |
| Slots | — | 0 |
| Temp (Load) | 75°C | — |
| Perf/Watt | 33.8+196% | 11.4 |
Value Analysis
At launch, the GeForce 840A came in at $100, while the Radeon R7 A8-7690K launched at $80. On MSRP, Radeon R7 A8-7690K was 20% cheaper ($20 less). Performance per dollar on MSRP (G3D Mark / MSRP): 11.2 (GeForce 840A) vs 14.3 (Radeon R7 A8-7690K) — the Radeon R7 A8-7690K offers 27.7% better value. The newer card here is Radeon R7 A8-7690K (2015 vs 2014).
| Feature | GeForce 840A | Radeon R7 A8-7690K |
|---|---|---|
| MSRP | $100 | $80-20% |
| Performance per Dollar | 11.2 | 14.3+28% |
| Codename | GM108 | Trinidad |
| Release | March 17 2014 | June 18 2015 |
| Ranking | #850 | #467 |
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