Radeon RX 5900 XT vs HD 6450 GDDR5
Contents
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1191 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Power efficiency | 2.54 | no data |
| Architecture | Terascale 2 (2009−2015) | RDNA 2.0 (2020−2025) |
| GPU code name | Caicos | Navi 21 |
| Market segment | Desktop | Desktop |
| Release date | 18 April 2011 (14 years ago) | no data |
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 | 160 | 4352 |
| Core clock speed | 750 MHz | no data |
| Boost clock speed | no data | 1735 MHz |
| Number of transistors | no data | 21,000 million |
| Manufacturing process technology | 40 nm | 7 nm |
| Power consumption (TDP) | 27 Watt | 300 Watt |
| Texture fill rate | no data | 471.9 |
| Floating-point processing power | no data | 15.1 TFLOPS |
| ROPs | no data | 96 |
| TMUs | no data | 272 |
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).
| Interface | no data | PCIe 4.0 x16 |
| Width | no data | 2-slot |
| Supplementary power connectors | no data | 2x 8-pin |
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 | GDDR6 |
| Maximum RAM amount | 1 GB | 12 GB |
| Memory bus width | 64 Bit | 384 Bit |
| Memory clock speed | 900 MHz | 14000 MHz |
| Memory bandwidth | no data | 672.0 GB/s |
| Shared memory | - | - |
| Resizable BAR | - | + |
Connectivity and outputs
This section shows the types and number of video connectors on each GPU. The data applies specifically to desktop reference models (for example, NVIDIA’s Founders Edition). OEM partners often modify both the number and types of ports. On notebook GPUs, video‐output options are determined by the laptop’s design rather than the graphics chip itself.
| Display Connectors | no data | 1x HDMI, 3x DisplayPort |
| HDMI | - | + |
API and SDK support
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | 11 | 12 Ultimate (12_1) |
| OpenGL | no data | 4.6 |
Pros & cons summary
| Maximum RAM amount | 1 GB | 12 GB |
| Chip lithography | 40 nm | 7 nm |
| Power consumption (TDP) | 27 Watt | 300 Watt |
HD 6450 GDDR5 has 1011% lower power consumption.
RX 5900 XT, on the other hand, has a 1100% higher maximum VRAM amount, and a 471% more advanced lithography process.
We couldn't decide between Radeon HD 6450 GDDR5 and Radeon RX 5900 XT. We've got no test results to judge.
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