Radeon Instinct MI300X vs R5 M255
Primary details
GPU architecture, market segment, value for money and other general parameters compared.
| Place in the ranking | 1004 | not rated |
| Place by popularity | not in top-100 | not in top-100 |
| Architecture | GCN 3.0 (2014−2019) | CDNA 3.0 (2023−2024) |
| GPU code name | Topaz | Aqua Vanjaram |
| Market segment | Laptop | Workstation |
| Release date | 12 October 2014 (10 years ago) | 6 December 2023 (less than a year ago) |
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 | 19456 |
| Compute units | 5 | no data |
| Core clock speed | 925 MHz | 1000 MHz |
| Boost clock speed | 940 MHz | 2100 MHz |
| Number of transistors | 1,550 million | 153,000 million |
| Manufacturing process technology | 28 nm | 5 nm |
| Power consumption (TDP) | no data | 750 Watt |
| Texture fill rate | 22.56 | 2,554 |
| Floating-point processing power | 0.7219 TFLOPS | 81.72 TFLOPS |
| ROPs | 8 | no data |
| TMUs | 24 | 1216 |
| Tensor Cores | no data | 1216 |
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 3.0 x8 | no data |
| Interface | PCIe 3.0 x8 | PCIe 5.0 x16 |
| Width | no data | OAM Module |
| Supplementary power connectors | no data | 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 | DDR3 | HBM3 |
| Maximum RAM amount | 4 GB | 192 GB |
| Memory bus width | 64 Bit | 8192 Bit |
| Memory clock speed | 1000 MHz | 2525 MHz |
| Memory bandwidth | 16 GB/s | 5,171 GB/s |
| Shared memory | - | - |
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 | No outputs | No outputs |
| Eyefinity | + | - |
Supported technologies
Supported technological solutions. This information will prove useful if you need some particular technology for your purposes.
| AppAcceleration | + | - |
| HD3D | + | - |
| PowerTune | + | - |
| DualGraphics | + | - |
| ZeroCore | + | - |
| Switchable graphics | + | - |
API compatibility
List of supported 3D and general-purpose computing APIs, including their specific versions.
| DirectX | DirectX® 11 | N/A |
| Shader Model | 6.3 | N/A |
| OpenGL | 4.4 | N/A |
| OpenCL | Not Listed | 3.0 |
| Vulkan | - | N/A |
| Mantle | + | - |
Pros & cons summary
| Recency | 12 October 2014 | 6 December 2023 |
| Maximum RAM amount | 4 GB | 192 GB |
| Chip lithography | 28 nm | 5 nm |
Instinct MI300X has an age advantage of 9 years, a 4700% higher maximum VRAM amount, and a 460% more advanced lithography process.
We couldn't decide between Radeon R5 M255 and Radeon Instinct MI300X. We've got no test results to judge.
Be aware that Radeon R5 M255 is a notebook card while Radeon Instinct MI300X is a workstation one.
Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.
Comparisons with similar GPUs
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