AMD Radeon 8065S vs NVIDIA B300 SXM6 AC Comparison

The Verdict

The AMD Radeon 8065S and NVIDIA B300 SXM6 AC occupy entirely different segments of the GPU market, and the recorded data reflects that separation clearly. The B300 SXM6 AC is a server-class accelerator with a percentile rank of 100 against all GPUs in the database, meaning it outperforms every other recorded GPU. The Radeon 8065S sits at the 50th percentile, placing it squarely in the midrange of the database. The B300 SXM6 AC carries 76.99 TFLOPS of FP32 compute, while the Radeon 8065S delivers 15.36 TFLOPS. That is a 5x difference in raw floating-point throughput. The B300 SXM6 AC also has an average benchmark score of 369,831 in Geekbench OpenCL, while the Radeon 8065S has no recorded benchmark score. For anyone selecting purely on compute capability, the B300 SXM6 AC is the only choice. For anyone constrained by power, physical footprint, or the need for a display output, the Radeon 8065S is the only viable option, since the B300 SXM6 AC has no display outputs and draws 1100 W.

Where Each One Wins

The B300 SXM6 AC wins decisively in every head-to-head compute scenario. Its FP32 throughput of 76.99 TFLOPS dwarfs the Radeon 8065S's 15.36 TFLOPS. Its FP16 throughput is also 76.99 TFLOPS, again versus 15.36 TFLOPS on the AMD part. The NVIDIA accelerator has 18944 shading units, 592 tensor cores, and 592 TMUs. The Radeon 8065S has 2560 shading units, 40 ray tracing cores, 160 TMUs, and 64 ROPs. The B300 SXM6 AC has no recorded RT cores, but it has 592 tensor cores, which the Radeon 8065S lacks entirely. Memory is another categorical win for NVIDIA: 288 GB of HBM3e on an 8192-bit bus with 8.19 TB/s of bandwidth, versus system-shared memory on the AMD part with system-dependent bandwidth. The B300 SXM6 AC also uses a PCIe 6.0 x16 interface, while the Radeon 8065S uses PCIe 5.0 x16. In texture rate, the NVIDIA part reaches 1,202.9 GTexel/s versus 480.0 GTexel/s for AMD. Pixel rate is the one metric where AMD wins: 192.0 GPixel/s versus 48.77 GPixel/s on the B300 SXM6 AC. That advantage stems from the Radeon 8065S's 64 ROPs compared to only 24 ROPs on the NVIDIA part. The B300 SXM6 AC also wins on process node density, packing 208,000 million transistors onto a 1628 mm² die with a density of 127.8M transistors per mm², while the Radeon 8065S uses a 308 mm² die with an unknown transistor count. The Radeon 8065S wins on power efficiency in absolute terms: 55 W versus 1100 W. It also wins on physical integration, being an IGP with no power connectors, whereas the B300 SXM6 AC is an SXM module requiring a 1500 W suggested PSU.

Architecture Differences

The Radeon 8065S uses the Gorgon Halo chip built on RDNA 3.5, fabricated on a 4 nm TSMC process. It belongs to the Navi Mobile (RX 8000M) generation. The B300 SXM6 AC uses the GB110 chip built on Blackwell Ultra, fabricated on a 5 nm TSMC process. It belongs to the Server Blackwell (Bxx) generation. The Radeon 8065S has a base clock of 1295 MHz and a boost clock of 3000 MHz. The B300 SXM6 AC has a base clock of 1665 MHz and a boost clock of 2032 MHz. Die size differs substantially: 308 mm² for the AMD chip versus 1628 mm² for the NVIDIA chip. Transistor count is unknown for the Radeon 8065S, while the B300 SXM6 AC carries 208,000 million transistors with a density of 127.8M per mm². Memory architecture is fundamentally different. The Radeon 8065S uses system-shared memory, meaning capacity, type, bus width, and bandwidth are all system-dependent. The B300 SXM6 AC has 288 GB of HBM3e on a 8192-bit bus, delivering 8.19 TB/s. The AMD part's memory clock is listed as system shared, while the NVIDIA part runs at 2000 MHz with 8 Gbps effective. API support also differs. The Radeon 8065S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B300 SXM6 AC lists N/A for DirectX, OpenGL, and Vulkan, reflecting its compute-focused server role. Display outputs are another split: the Radeon 8065S has portable-device-dependent outputs, while the B300 SXM6 AC has no outputs. The AMD part is an IGP with no power connectors and a 55 W TDP. The NVIDIA part is an SXM module with a 1100 W TDP and a 1500 W suggested PSU. The Radeon 8065S has a release date of 2025-12-31, while the B300 SXM6 AC has a release date of 2025-09-10. The AMD part's predecessor is Polaris Mobile, with no successor listed. The NVIDIA part's predecessor is Server Hopper, and its successor is Server Rubin. Production status for both is Active.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA B300 SXM6 AC delivers 76.99 TFLOPS of FP32 performance, which is 5x higher than the AMD Radeon 8065S's 15.36 TFLOPS.

Q: Does the AMD Radeon 8065S have tensor cores?

A: No. The Radeon 8065S has 40 ray tracing cores but no tensor cores. The NVIDIA B300 SXM6 AC has 592 tensor cores but no recorded RT cores.

Q: What is the memory configuration of the NVIDIA B300 SXM6 AC?

A: The B300 SXM6 AC has 288 GB of HBM3e memory on an 8192-bit bus with 8.19 TB/s of bandwidth. The AMD Radeon 8065S uses system-shared memory with system-dependent bandwidth.

Q: Can the NVIDIA B300 SXM6 AC output video to a display?

A: No. The B300 SXM6 AC has no display outputs. The Radeon 8065S has portable-device-dependent display outputs.

Q: How do the power requirements compare?

A: The Radeon 8065S has a 55 W TDP and requires no power connectors. The B300 SXM6 AC has a 1100 W TDP and a 1500 W suggested PSU.

Q: Which GPU has a higher pixel rate?

A: The AMD Radeon 8065S has a pixel rate of 192.0 GPixel/s, which is higher than the NVIDIA B300 SXM6 AC's 48.77 GPixel/s.

Head-to-Head Benchmarks

The B300 SXM6 AC has a recorded Geekbench OpenCL score of 369,831. The Radeon 8065S has no recorded benchmark scores, so direct benchmark comparison is limited to the NVIDIA part's results against its nearest rivals. The B300 SXM6 AC is 7% ahead of the NVIDIA B200, which scores 345,482. It is 10.4% ahead of the NVIDIA H200 NVL, which scores 334,891. It is 16.3% ahead of the AMD Instinct MI300X, which scores 317,994. It is 25% ahead of the NVIDIA L40S, which scores 295,763. These deltas show the B300 SXM6 AC leading its own server-class peer group by a clear margin. The largest gap in its recorded rival set is against the L40S, where the B300 SXM6 AC holds a 25% advantage. The smallest gap is against the B200, where the lead narrows to 7%. The Radeon 8065S's 50th percentile rank places it in the middle of the database, but without a benchmark score, its position relative to these server parts cannot be quantified. The architectural comparison provides the only measurable head-to-head data. In FP32, the B300 SXM6 AC's 76.99 TFLOPS is 5x the Radeon 8065S's 15.36 TFLOPS. In FP16, the same ratio holds. Texture rate favors NVIDIA at 1,202.9 GTexel/s versus 480.0 GTexel/s. Pixel rate favors AMD at 192.0 GPixel/s versus 48.77 GPixel/s. Shading unit count favors NVIDIA at 18944 versus 2560. TMU count favors NVIDIA at 592 versus 160. ROP count favors AMD at 64 versus 24. The B300 SXM6 AC's 208,000 million transistors on a 1628 mm² die contrast with the Radeon 8065S's unknown transistor count on a 308 mm² die. The B300 SXM6 AC's 8.19 TB/s memory bandwidth, 288 GB capacity, and 8192-bit bus have no equivalent on the AMD side, which relies entirely on system-shared memory. Clock speeds tell a mixed story: the Radeon 8065S boosts to 3000 MHz, while the B300 SXM6 AC boosts to 2032 MHz. The AMD part's higher boost clock does not compensate for the NVIDIA part's massive advantages in shading units, memory bandwidth, and compute throughput. The B300 SXM6 AC's 1100 W TDP and 1500 W suggested PSU reflect its server accelerator role, while the Radeon 8065S's 55 W TDP and IGP form factor reflect its mobile integration role. The B300 SXM6 AC's PCIe 6.0 x16 interface is a generation ahead of the Radeon 8065S's PCIe 5.0 x16. The B300 SXM6 AC also lists N/A for all graphics APIs, while the Radeon 8065S supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. These differences confirm that the two parts target different workloads entirely. The B300 SXM6 AC is built for compute density, with 592 tensor cores, 76.99 TFLOPS in both FP32 and FP16, and 288 GB of HBM3e. The Radeon 8065S is built for integrated graphics, with 40 RT cores, 64 ROPs, and a 192.0 GPixel/s pixel rate that exceeds the NVIDIA part's 48.77 GPixel/s.