AMD Instinct MI308X vs AMD Radeon 8065S Comparison

Head-to-Head Benchmarks

The recorded database contains no direct head-to-head benchmark results for the AMD Instinct MI308X against the AMD Radeon 8065S. Both entries show zero benchmark scores, zero wins for either side, and an empty head-to-head comparison set. The absence of measured data means no direct performance delta can be calculated from the database at this time.

However, the raw specification data provides a clear basis for projecting how these two parts would interact in a head-to-head scenario. The Instinct MI308X is built around a vastly larger compute configuration. It carries 19,456 shading units, 1,216 texture mapping units, and zero render output units. The Radeon 8065S carries 2,560 shading units, 160 texture mapping units, and 64 render output units. That is a 7.6x difference in shading units and a 7.6x difference in texture mapping units, both favoring the Instinct part.

The floating-point throughput figures follow the same pattern. The MI308X delivers 81.72 TFLOPS for both FP32 and FP16 operations, with a 1:1 ratio between the two. The Radeon 8065S delivers 15.36 TFLOPS for both FP32 and FP16, also at a 1:1 ratio. The Instinct part therefore provides 5.32x the FP32 throughput and 5.32x the FP16 throughput of the mobile Radeon. Texture rate tells a similar story: the MI308X reaches 2,553.6 GTexel/s, while the 8065S reaches 480.0 GTexel/s, a 5.32x advantage for the Instinct.

The one area where the Radeon 8065S shows a clear numerical win is pixel throughput. The MI308X records 0 MPixel/s because it has no ROPs, while the 8065S delivers 192.0 GPixel/s from its 64 ROPs. This is a fundamental architectural split: the Instinct accelerators are designed without a rasterization pipeline, whereas the Radeon mobile part retains full graphics output capability.

Clock speeds also differ substantially. The MI308X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The Radeon 8065S has a base clock of 1295 MHz and a boost clock of 3000 MHz. The mobile part runs 29.5% higher at base and 42.9% higher at boost, but the massive shader count disparity on the Instinct overwhelms the clock advantage in aggregate throughput.

Memory bandwidth is another decisive split. The MI308X uses 192 GB of HBM3 memory on an 8192-bit bus, reaching 5.32 TB/s. The Radeon 8065S uses system shared memory with system dependent bandwidth, so no fixed bandwidth figure exists in the database. The Instinct's dedicated high-bandwidth memory stack is in a different class from the shared memory architecture of the mobile part.

Where Each One Wins

The AMD Instinct MI308X wins decisively in compute-heavy workloads that scale with raw shader count, texture throughput, and memory bandwidth. Its 81.72 TFLOPS FP32 and FP16 figures position it as a high-throughput accelerator for dense parallel math. The 5.32 TB/s memory bandwidth supports large data sets that would stall a system-shared memory design. The 192 GB HBM3 capacity is not a fixed number for the Radeon 8065S, which instead relies on whatever system memory is present. The Instinct's 5 nm process node with 153,000 million transistors on a 1017 mm² die gives it a transistor density of 150.4M per mm², indicating a massive compute-oriented silicon.

The AMD Radeon 8065S wins in any scenario requiring graphics output, rasterization, or display connectivity. It has 64 ROPs and a 192.0 GPixel/s pixel rate, while the MI308X has zero ROPs and a 0 MPixel/s pixel rate. The 8065S also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the MI308X reports N/A for all three APIs. The mobile part is an IGP (integrated graphics processor) with portable device dependent display outputs, making it suitable for systems that need on-screen rendering. The Instinct has no display outputs at all.

The 8065S also wins on power efficiency in absolute terms. Its TDP is 55 W versus the MI308X's 750 W. The mobile part runs on a 4 nm process node compared to the Instinct's 5 nm node, and its die size is 308 mm² versus 1017 mm². The Radeon 8065S is also marked as Active in production status, while the Instinct's production status is null in the database. The 8065S has a higher boost clock, 3000 MHz versus 2100 MHz, which helps latency-sensitive tasks that do not fully utilize the shader array.

For workloads like machine learning inference on small batches, the 8065S's higher clock speeds and integrated nature may reduce overhead, but the database shows no benchmark scores to confirm this. The Instinct's advantages in raw throughput and memory capacity make it the clear choice for large-scale training or dense compute, while the Radeon 8065S is the only one of the two that can produce a video signal. The 8065S has 40 ray tracing cores, while the MI308X has null entries for both ray tracing and tensor cores, so the mobile part is the only one with hardware ray tracing support.

Architecture Differences

The two AMD parts come from different architecture families. The Instinct MI308X uses CDNA 3.0, while the Radeon 8065S uses RDNA 3.5. CDNA is AMD's compute-oriented architecture, designed for accelerators without graphics output. RDNA is the graphics-oriented architecture, used for consumer and mobile GPUs. The chip codenames reflect this split: the MI308X uses "Aqua Vanjaram," while the 8065S uses "Gorgon Halo."

The process nodes differ. The MI308X is built on TSMC's 5 nm process, while the 8065S is built on TSMC's 4 nm process. The smaller node gives the mobile part a density advantage per square millimeter, though the database does not list a transistor count or density for the 8065S. The MI308X has 153,000 million transistors on a 1017 mm² die, yielding 150.4M transistors per mm². The 8065S has a 308 mm² die with unknown transistor count.

Memory architecture splits the two completely. The MI308X uses 192 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth and a memory clock of 1300 MHz (5.2 Gbps effective). The Radeon 8065S uses system shared memory, meaning its memory size, type, bus width, and bandwidth are all system dependent. There is no dedicated VRAM on the 8065S. This is a fundamental difference: one part has a fixed, enormous, ultra-wide memory pool; the other borrows from the host system.

Compute unit composition differs as well. The MI308X has 19,456 shading units, 1,216 TMUs, and 0 ROPs. It has no ray tracing cores and no tensor cores listed. The 8065S has 2,560 shading units, 160 TMUs, and 64 ROPs. It has 40 ray tracing cores. The lack of ROPs on the Instinct means no pixel output, which aligns with its N/A API support for DirectX, OpenGL, and Vulkan. The 8065S supports all three.

Power delivery differs by form factor. The MI308X is an OAM module with a 750 W TDP and a suggested PSU of 1150 W. It has no power connectors listed, which is typical for an OAM module that receives power through the socket. The Radeon 8065S is an IGP with a 55 W TDP and no suggested PSU, since it draws power from the host system. Both use PCIe 5.0 x16 for the bus interface.

Release timing also differs. The MI308X was released on December 5, 2023, and its predecessor is Radeon Instinct. The 8065S has a release date of December 31, 2025, and its predecessor is Polaris Mobile. The 8065S is in the Navi Mobile (RX 8000M) generation, while the MI308X is in the Instinct (MIx) generation. The MI308X is a discrete accelerator module, while the 8065S is an integrated graphics processor within a portable device.

FAQ

Q: Which GPU has higher raw FP32 compute throughput?

A: The AMD Instinct MI308X delivers 81.72 TFLOPS FP32, which is 5.32x the 15.36 TFLOPS of the AMD Radeon 8065S.

Q: Does the AMD Instinct MI308X support graphics APIs?

A: No, the MI308X reports N/A for DirectX, OpenGL, and Vulkan. It has no display outputs and zero render output units, producing 0 MPixel/s.

Q: What is the memory configuration difference between the two?

A: The MI308X has 192 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The 8065S uses system shared memory with system dependent bandwidth, size, type, and bus width.

Q: Which GPU has a higher boost clock?

A: The Radeon 8065S boosts to 3000 MHz, while the Instinct MI308X boosts to 2100 MHz. The 8065S also has a higher base clock at 1295 MHz versus 1000 MHz.

Q: Does the Radeon 8065S have ray tracing hardware?

A: Yes, the 8065S has 40 ray tracing cores. The MI308X has no ray tracing cores listed.

Q: What are the power consumption figures?

A: The MI308X has a 750 W TDP with a suggested PSU of 1150 W. The 8065S has a 55 W TDP and no suggested PSU listed.

Specification Differences

| Specification | AMD Instinct MI308X | AMD Radeon 8065S |

|----------------|---------------------|------------------|

| Architecture | CDNA 3.0 | RDNA 3.5 |

| Chip | Aqua Vanjaram | Gorgon Halo |

| Generation | Instinct (MIx) | Navi Mobile (RX 8000M) |

| Process Node | 5 nm | 4 nm |

| Transistors | 153,000 million | unknown |

| Die Size | 1017 mm² | 308 mm² |

| Transistor Density | 150.4M / mm² | null |

| Base Clock | 1000 MHz | 1295 MHz |

| Boost Clock | 2100 MHz | 3000 MHz |

| Memory Clock | 1300 MHz 5.2 Gbps effective | System Shared |

| Memory Size | 192 GB | System Shared |

| Memory Type | HBM3 | System Shared |

| Memory Bus Width | 8192 bit | System Shared |

| Memory Bandwidth | 5.32 TB/s | System Dependent |

| Shading Units | 19456 | 2560 |

| TMUs | 1216 | 160 |

| ROPs | 0 | 64 |

| Ray Tracing Cores | null | 40 |

| Pixel Rate | 0 MPixel/s | 192.0 GPixel/s |

| Texture Rate | 2,553.6 GTexel/s | 480.0 GTexel/s |

| FP32 | 81.72 TFLOPS | 15.36 TFLOPS |

| FP16 | 81.72 TFLOPS (1:1) | 15.36 TFLOPS (1:1) |

| TDP | 750 W | 55 W |

| Slot Width | OAM Module | IGP |

| Power Connectors | None | None |

| Suggested PSU | 1150 W | null |

| Display Outputs | No outputs | Portable Device Dependent |

| DirectX | N/A | 12 Ultimate (12_2) |

| OpenGL | N/A | 4.6 |

| Vulkan | N/A | 1.4 |

| Production Status | null | Active |

| Release Date | 2023-12-05 | 2025-12-31 |

| Predecessor | Radeon Instinct | Polaris Mobile |