GeForce GT 640 Rev. 2
Radeon R7 A8-7690K
GeForce GT 640 Rev. 2 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 GT 640 Rev. 2 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 GT 640 Rev. 2 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 GT 640 Rev. 2
2013Why buy it
- ✅Draws 49W instead of 100W, a 51W reduction.
Trade-offs
- ❌Lower average FPS than Radeon R7 A8-7690K across 50 tracked games in our benchmark data.
- ❌2013 hardware with 512 MB of VRAM is already well past its comfortable zone for modern gaming, so it is hard to recommend now.
- ❌23.8% HIGHER MSRP$99 MSRPvs$80 MSRP
- ❌Lower G3D Mark per dollar, at 11.8 vs 14.3 G3D/$ ($99 MSRP vs $80 MSRP).
- ❌14400% longer card at 145mm vs 1mm.
Radeon R7 A8-7690K
2015Why buy it
- ✅122.7% more average FPS across 50 tracked games in our benchmark data.
- ✅Costs $19 less on MSRP ($80 MSRP vs $99 MSRP).
- ✅Delivers 20.9% more G3D Mark for each dollar spent, at 14.3 vs 11.8 G3D/$ ($80 MSRP vs $99 MSRP).
- ✅Measures 1mm instead of 145mm, a 144mm shorter card that is more SFF-friendly.
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.
- ❌104.1% higher power demand at 100W vs 49W.
Quick Answers
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GeForce GT 640 Rev. 2 vs Radeon R7 A8-7690K Technical Specifications
Side-by-side specs, architecture details, clocks, memory, power, and platform differences.
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)
The GeForce GT 640 Rev. 2 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 GT 640 Rev. 2 | 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 64-bit on the GeForce GT 640 Rev. 2 and 128-bit on the Radeon R7 A8-7690K. 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
At launch, the GeForce GT 640 Rev. 2 came in at $99, while the Radeon R7 A8-7690K launched at $80. On MSRP, Radeon R7 A8-7690K was 19.2% cheaper ($19 less). Performance per dollar on MSRP (G3D Mark / MSRP): 11.8 (GeForce GT 640 Rev. 2) vs 14.3 (Radeon R7 A8-7690K) — the Radeon R7 A8-7690K offers 21.2% better value. The newer card here is Radeon R7 A8-7690K (2015 vs 2013).
| Feature | GeForce GT 640 Rev. 2 | Radeon R7 A8-7690K |
|---|---|---|
| MSRP | $99 | $80-19% |
| Performance per Dollar | 11.8 | 14.3+21% |
| Codename | GK208 | Trinidad |
| Release | May 29 2013 | June 18 2015 |
| Ranking | #786 | #467 |
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