GeForce GT 640 Rev. 2 vs Radeon R9 295X2
Aggregate performance score
We've compared Radeon R9 295X2 and GeForce GT 640 Rev. 2, covering specs and all relevant benchmarks.
R9 295X2 outperforms GT 640 Rev. 2 by a whopping 526% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 260 | 733 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 2.09 | 0.19 |
| Power efficiency | 3.06 | 4.99 |
| Architecture | GCN 2.0 (2013−2017) | Kepler 2.0 (2013−2015) |
| GPU code name | Vesuvius | GK208 |
| Market segment | Desktop | Desktop |
| Design | reference | no data |
| Release date | 29 April 2014 (10 years ago) | 29 May 2013 (11 years ago) |
| Launch price (MSRP) | $1,499 | $89 |
Cost-effectiveness evaluation
The higher the performance-to-price ratio, the better. We use the manufacturer's recommended prices for comparison.
R9 295X2 has 1000% better value for money than GT 640 Rev. 2.
Detailed specifications
General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.
| Pipelines / CUDA cores | 2816 ×2 | 384 |
| Core clock speed | no data | 1046 MHz |
| Boost clock speed | 1018 MHz | no data |
| Number of transistors | 6,200 million | 915 million |
| Manufacturing process technology | 28 nm | 28 nm |
| Power consumption (TDP) | 500 Watt | 49 Watt |
| Texture fill rate | 179.2 ×2 | 33.47 |
| Floating-point processing power | 5.733 TFLOPS ×2 | 0.8033 TFLOPS |
| ROPs | 64 ×2 | 8 |
| TMUs | 176 ×2 | 32 |
Form factor & compatibility
Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).
| Bus support | PCIe 2.1 x16 | no data |
| Interface | PCIe 3.0 x16 | PCIe 2.0 x8 |
| Length | 307 mm | 145 mm |
| Width | 2-slot | 1-slot |
| Supplementary power connectors | 2 x 8-pin | None |
VRAM capacity and type
Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.
| Memory type | GDDR5 | GDDR5 |
| Maximum RAM amount | 8 GB ×2 | 1 GB |
| Memory bus width | 512 Bit ×2 | 64 Bit |
| Memory clock speed | 1250 MHz | 1252 MHz |
| Memory bandwidth | 640 GB/s ×2 | 40.06 GB/s |
Connectivity and outputs
Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.
| Display Connectors | 1x DVI, 4x mini-DisplayPort | 1x DVI, 1x HDMI, 1x VGA |
| Eyefinity | + | - |
| HDMI | + | + |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| CrossFire | + | - |
| FreeSync | + | - |
| HD3D | + | - |
| LiquidVR | + | - |
| TressFX | + | - |
| UVD | + | - |
| DDMA audio | + | no data |
API and SDK compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | DirectX® 12 | 12 (11_0) |
| Shader Model | 6.3 | 5.1 |
| OpenGL | 4.6 | 4.6 |
| OpenCL | 2.0 | 1.2 |
| Vulkan | + | 1.1.126 |
| CUDA | - | 3.5 |
Gaming performance
Let's see how good the compared graphics cards are for gaming. Particular gaming benchmark results are measured in FPS.
Pros & cons summary
| Performance score | 19.23 | 3.07 |
| Recency | 29 April 2014 | 29 May 2013 |
| Maximum RAM amount | 8 GB | 1 GB |
| Power consumption (TDP) | 500 Watt | 49 Watt |
R9 295X2 has a 526.4% higher aggregate performance score, an age advantage of 11 months, and a 700% higher maximum VRAM amount.
GT 640 Rev. 2, on the other hand, has 920.4% lower power consumption.
The Radeon R9 295X2 is our recommended choice as it beats the GeForce GT 640 Rev. 2 in performance tests.
Other comparisons
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