Radeon HD 6450 vs GeForce GT 640 Rev. 2
Aggregate performance score
We've compared GeForce GT 640 Rev. 2 and Radeon HD 6450, covering specs and all relevant benchmarks.
GT 640 Rev. 2 outperforms HD 6450 by a whopping 596% based on our aggregate benchmark results.
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 717 | 1223 |
| Place by popularity | not in top-100 | not in top-100 |
| Cost-effectiveness evaluation | 0.19 | no data |
| Power efficiency | 5.02 | 1.96 |
| Architecture | Kepler 2.0 (2013−2015) | TeraScale 2 (2009−2015) |
| GPU code name | GK208 | Caicos |
| Market segment | Desktop | Desktop |
| Design | no data | reference |
| Release date | 29 May 2013 (11 years ago) | 7 April 2011 (13 years ago) |
| Launch price (MSRP) | $89 | $55 |
Cost-effectiveness evaluation
Performance to price ratio. The higher, the better.
GT 640 Rev. 2 and HD 6450 have a nearly equal value for money.
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 | 384 | 160 |
| Core clock speed | 1046 MHz | no data |
| Boost clock speed | no data | 750 MHz |
| Number of transistors | 915 million | 370 million |
| Manufacturing process technology | 28 nm | 40 nm |
| Power consumption (TDP) | 49 Watt | 30 Watt |
| Texture fill rate | 33.47 | 5.000 |
| Floating-point processing power | 0.8033 TFLOPS | 0.2 TFLOPS |
| ROPs | 8 | 4 |
| TMUs | 32 | 8 |
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 | no data | PCIe 2.0 x8 |
| Interface | PCIe 2.0 x8 | PCIe 2.0 x16 |
| Length | 145 mm | 168 mm |
| Width | 1-slot | 1-slot |
| Supplementary power connectors | None | 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 | 1 GB | 1 GB |
| Memory bus width | 64 Bit | 64 Bit |
| Memory clock speed | 1252 MHz | 800 MHz |
| Memory bandwidth | 40.06 GB/s | 25.6 GB/s |
| Memory bandwidth | no data | 8.5-12.8 GB/x (DDR3) or 25.6-28.8 GB/s (GDDR5) |
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, 1x HDMI, 1x VGA | 1x DVI, 1x HDMI, 1x VGA |
| Eyefinity | - | + |
| Number of Eyefinity displays | no data | 4 |
| HDMI | + | + |
| DisplayPort support | - | + |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| CrossFire | - | + |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 12 (11_0) | DirectX® 11 |
| Shader Model | 5.1 | 5.0 |
| OpenGL | 4.6 | 4.4 |
| OpenCL | 1.2 | 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 | 3.55 | 0.51 |
| Recency | 29 May 2013 | 7 April 2011 |
| Chip lithography | 28 nm | 40 nm |
| Power consumption (TDP) | 49 Watt | 30 Watt |
GT 640 Rev. 2 has a 596.1% higher aggregate performance score, an age advantage of 2 years, and a 42.9% more advanced lithography process.
HD 6450, on the other hand, has 63.3% lower power consumption.
The GeForce GT 640 Rev. 2 is our recommended choice as it beats the Radeon HD 6450 in performance tests.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.
