AMD Instinct MI300X vs AMD Radeon 8065S Comparison

Where Each One Wins

The benchmark data draws a sharp line between these two AMD accelerators. The Instinct MI300X is a compute-optimized datacenter part with a recorded Geekbench OpenCL score of 317,994, placing it in the 100th percentile of all GPUs in the database. The Radeon 8065S, by contrast, has no recorded benchmark scores, sits at the 50th percentile, and carries an average benchmark score of zero. The MI300X wins every measurable compute contest by default, but the two chips serve entirely different deployment contexts.

The MI300X wins in raw compute throughput, memory capacity, and bandwidth. It delivers 81.72 TFLOPS of FP32 and FP16 (1:1), 192 GB of HBM3 memory on a 8192-bit bus, and 5.32 TB/s of memory bandwidth. These figures position it as a high-end accelerator for workloads that demand massive parallel throughput and enormous in-memory datasets. Its texture rate reaches 2,553.6 GTexel/s, and its boost clock hits 2100 MHz.

The Radeon 8065S wins in power efficiency and physical integration. It draws 55 W compared to the MI300X's 750 W, uses a 4 nm process node versus 5 nm, and is an IGP (integrated graphics processor) with system-shared memory. It has no dedicated memory bus or bandwidth figures; those are system dependent. The 8065S also wins on graphics feature support, with DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI300X reports N/A for all graphics APIs. The 8065S also has display outputs (portable device dependent), whereas the MI300X has no outputs at all.

Architecture Differences

The architectural gap between these two parts is fundamental. The MI300X uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, built on a 5 nm TSMC process. It packs 153,000 million transistors across a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. The 8065S uses RDNA 3.5 on the Gorgon Halo chip, built on a 4 nm TSMC process with a 308 mm² die. Its transistor count is unknown, and its transistor density is not recorded.

The MI300X has 19,456 shading units, 1,216 texture mapping units, and zero ROPs. Its pixel rate is 0 MPixel/s, consistent with a compute accelerator that lacks a traditional rasterization pipeline. The 8065S has 2,560 shading units, 160 TMUs, 64 ROPs, and 40 ray tracing cores. Its pixel rate reaches 192.0 GPixel/s, and its texture rate is 480.0 GTexel/s. The MI300X has no listed ray tracing cores or tensor cores; the 8065S has ray tracing cores but no tensor cores.

Memory architecture differs completely. The MI300X uses 192 GB of HBM3 with an 8192-bit bus and 5.32 TB/s bandwidth. The 8065S uses system-shared memory with system-dependent bandwidth. Clock behavior also diverges: the MI300X runs at a 1000 MHz base and 2100 MHz boost with memory at 1300 MHz (5.2 Gbps effective), while the 8065S runs at 1295 MHz base and 3000 MHz boost.

Physical and interface characteristics reinforce the split. The MI300X is an OAM Module with no power connectors and a suggested PSU of 1150 W. The 8065S is an IGP with no power connectors and no suggested PSU. Both use PCIe 5.0 x16. The MI300X has no display outputs; the 8065S outputs are portable device dependent. The MI300X was released on 2023-12-05, while the 8065S followed on 2025-12-31. The MI300X succeeds the Radeon Instinct; the 8065S succeeds Polaris Mobile.

The Verdict

The data indicates these are not competing products. The MI300X is a datacenter compute accelerator with a benchmark score of 317,994 and a 100th percentile rank. Its nearest rivals in the database are NVIDIA parts: the H200 NVL at 334,891 (5% ahead), the B200 at 345,482 (8% ahead), the L40S at 295,763 (7.5% behind), and the RTX 6000 Ada Generation at 287,237 (10.7% behind). The MI300X sits between those two clusters, ahead of the L40S and RTX 6000 Ada, behind the H200 NVL and B200.

The Radeon 8065S has no benchmark entries, an average score of zero, and a 50th percentile rank. It has no nearest rivals recorded. Its role is as an integrated graphics solution for portable devices, with a 55 W power envelope, ray tracing support, and modern graphics API coverage.

For compute-heavy datacenter workloads where raw FP32/FP16 throughput and large memory capacity matter, the MI300X is the only option with recorded data. For portable or low-power systems requiring graphics output and modern API support, the 8065S is the appropriate part, though its performance cannot be quantified from the database. The MI300X's lack of display outputs and graphics APIs makes it unsuitable for client graphics; the 8065S's lack of benchmark scores makes it unquantifiable for compute.

FAQ

Q: Which GPU has a higher recorded benchmark score?

A: The AMD Instinct MI300X has a Geekbench OpenCL score of 317,994. The AMD Radeon 8065S has no recorded benchmark scores, with an average benchmark score of zero.

Q: How does the MI300X compare to NVIDIA H200 NVL and B200?

A: The H200 NVL scores 334,891, which is 5% higher than the MI300X. The B200 scores 345,482, which is 8% higher. The MI300X trails both in the database's recorded measurements.

Q: How does the MI300X compare to NVIDIA L40S and RTX 6000 Ada?

A: The MI300X scores 317,994, which is 7.5% higher than the L40S at 295,763 and 10.7% higher than the RTX 6000 Ada Generation at 287,237.

Q: What are the memory specifications of each GPU?

A: The MI300X has 192 GB of HBM3 memory with an 8192-bit bus and 5.32 TB/s bandwidth. The 8065S uses system-shared memory with system-dependent bandwidth.

Q: Do both GPUs support ray tracing?

A: The Radeon 8065S has 40 ray tracing cores. The MI300X has no listed ray tracing cores.

Q: What is the power draw difference?

A: The MI300X has a TDP of 750 W with a suggested PSU of 1150 W. The 8065S has a TDP of 55 W with no suggested PSU listed.

Head-to-Head Benchmarks

The head-to-head benchmark table is empty, and neither GPU records a win in direct comparisons. The only quantitative benchmark data comes from the MI300X's Geekbench OpenCL score of 317,994. Against its nearest rivals, the MI300X shows a clear competitive position.

The MI300X beats the NVIDIA L40S by 7.5%, a margin that translates to roughly 22,231 points in the recorded scale. It also beats the NVIDIA RTX 6000 Ada Generation by 10.7%, a difference of about 30,757 points. These wins place the MI300X above two prominent NVIDIA accelerators in raw OpenCL compute performance.

The MI300X loses to the NVIDIA H200 NVL by 5%, a gap of approximately 16,897 points. It loses to the NVIDIA B200 by 8%, a gap of approximately 27,488 points. The MI300X therefore occupies a middle tier: ahead of the L40S and RTX 6000 Ada, behind the H200 NVL and B200.

The Radeon 8065S has no recorded measurements in the database, so no head-to-head comparisons can be constructed. Its percentile rank of 50 indicates it sits at the median of all GPUs in the database, but without a score, the database cannot place it relative to any specific rival.

The FP32 throughput difference is stark. The MI300X delivers 81.72 TFLOPS, while the 8065S delivers 15.36 TFLOPS, a 5.3x advantage for the datacenter part. Texture rate favors the MI300X at 2,553.6 GTexel/s versus 480.0 GTexel/s, a 5.3x difference. Pixel rate favors the 8065S at 192.0 GPixel/s versus 0 MPixel/s, because the MI300X has no ROPs.

The MI300X's boost clock of 2100 MHz is lower than the 8065S's 3000 MHz, but the MI300X compensates with 19,456 shading units versus 2,560, a 7.6x advantage in shader count. The 8065S has 64 ROPs and 40 ray tracing cores, features the MI300X lacks entirely.

Power consumption scales with capability: the MI300X draws 750 W, the 8065S draws 55 W. The MI300X is an OAM Module with no display outputs; the 8065S is an IGP with portable-device-dependent outputs. The MI300X uses 5 nm and has 153,000 million transistors on a 1017 mm² die; the 8065S uses 4 nm on a 308 mm² die with unknown transistor count.

The release dates show a two-year gap: the MI300X launched on 2023-12-05, the 8065S on 2025-12-31. The MI300X has no production status recorded; the 8065S is marked as active. Both use PCIe 5.0 x16, and both have no power connectors, though the MI300X requires a 1150 W suggested PSU.