NVIDIA GeForce 840A vs NVIDIA GeForce GTX 280
Graphics Processor
| GPU model | GM108 | GT200 |
|---|---|---|
| Architecture | Maxwell | Tesla 2.0 |
| Foundry | TSMC | TSMC |
| Manufacturing process | 28 nm | 65 nm |
| Number of transistors | unknown | 1,400 million |
| Die size | unknown | 576 mm² |
| GPU variant | — | G200-300-A2 |
Mobile graphics
| Release date | Mar 17th, 2014 | — |
|---|---|---|
| Generation | GeForce 800A | — |
| Production | End-of-life | — |
| Interface | PCIe 3.0 x8 | — |
| Predecessor | GeForce 700A | — |
| Successor | GeForce 900A | — |
Clocks
| Base clock | 1029 MHz | — |
|---|---|---|
| Boost clock | 1124 MHz | — |
| Memory clock | 1001 MHz 2 Gbps effective | 1107 MHz 2.2 Gbps effective |
| GPU clock | — | 602 MHz |
| Shader clock | — | 1296 MHz |
Memory Configuration
| Memory size | 2 GB | 1024 MB |
|---|---|---|
| Memory type | DDR3 | GDDR3 |
| Memory bus width | 64 bit | 512 bit |
| Bandwidth | 16.02 GB/s | 141.7 GB/s |
Render Configuration
| Shading units | 384 | 240 |
|---|---|---|
| TMUs | 16 | 80 |
| ROPs | 8 | 32 |
| SMM count | 3 | — |
| Cache L1 | 64 KB (per SMM) | — |
| Cache L2 | 1024 KB | 256 KB |
| SM count | — | 30 |
Performance
| Pixel rate | 8.992 GPixel/s | 19.26 GPixel/s |
|---|---|---|
| Texture rate | 17.98 GTexel/s | 48.16 GTexel/s |
| FP32 (float) performance | 863.2 GFLOPS | 622.1 GFLOPS |
| FP64 (double) performance | 26.98 GFLOPS (1:32) | 77.76 GFLOPS (1:8) |
Dimensions & Outputs
| Slot width | IGP | Dual-slot |
|---|---|---|
| TDP | 33 W | 236 W |
| Outputs | No outputs | 2x DVI1x S-Video |
| Length | — | 267 mm 10.5 inches |
| Suggested PSU | — | 550 W |
| Power connectors | — | 1x 6-pin + 1x 8-pin |
| Board number | — | P651 |
API Support & Features
| DirectX | 12 (11_0) | 11.1 (10_0) |
|---|---|---|
| OpenGL | 4.6 | 3.3 |
| OpenCL | 3.0 | 1.1 |
| Vulkan | 1.1 | — |
| CUDA | 5.0 | 1.3 |
| Shader model | 5.1 | 4.0 |
Other Features
Graphics Card
| Release date | — | Jun 16th, 2008 |
|---|---|---|
| Generation | — | GeForce 200 |
| Production | — | End-of-life |
| Launch price | — | 649 USD |
| Interface | — | PCIe 2.0 x16 |
| Reviews | — | 59 in our database |
| Predecessor | — | GeForce 9 |
| Successor | — | GeForce 400 |
