AMD Ryzen Z2 GPU vs NVIDIA B300 SXM6 AC Comparison

The Verdict

The recorded data positions the AMD Ryzen Z2 GPU and the NVIDIA B300 SXM6 AC at opposite extremes of the performance spectrum. The Ryzen Z2 GPU, a console-class RDNA 3.0 part, sits at the 50th percentile among all GPUs in the database, with no benchmark scores recorded and no nearest rivals identified. The B300 SXM6 AC, a Blackwell Ultra server accelerator, holds the 100th percentile, meaning it outperforms every other GPU in the database based on available measurements.

The B300 delivers a Geekbench OpenCL score of 369,831, placing it 7% ahead of the NVIDIA B200, 10.4% ahead of the NVIDIA H200 NVL, 16.3% ahead of the AMD Instinct MI300X, and 25% ahead of the NVIDIA L40S. These deltas confirm a clear leadership position within the server accelerator segment. The Ryzen Z2 GPU, by contrast, has no comparable score in the database, so its relative standing cannot be quantified beyond the 50th percentile ranking.

For users selecting based on the available data, the choice depends entirely on workload class. The B300 SXM6 AC is the only option among the two with demonstrated benchmark results, and its 76.99 TFLOPS FP32 throughput, 288 GB of HBM3e memory, and 8.19 TB/s bandwidth target server-scale compute. The Ryzen Z2 GPU, with 8.294 TFLOPS FP32, 16 GB of LPDDR5X, and a 28 W TDP, fits a compact, low-power console context. No benchmark data exists for the Ryzen part, so any performance comparison between the two would be speculative; the database only supports a descriptive comparison of specifications and the B300's measured lead in its own test.

FAQ

Q: Which GPU has the higher FP32 compute throughput in the database?

A: The NVIDIA B300 SXM6 AC records 76.99 TFLOPS FP32, compared to 8.294 TFLOPS for the AMD Ryzen Z2 GPU. The B300's figure is roughly 9.3 times higher, though the database provides no direct benchmark comparison between the two.

Q: What is the B300's measured performance relative to its nearest rivals?

A: The B300 scores 369,831 in Geekbench OpenCL. That is 7% higher than the NVIDIA B200's 345,482, 10.4% higher than the NVIDIA H200 NVL's 334,891, 16.3% higher than the AMD Instinct MI300X's 317,994, and 25% higher than the NVIDIA L40S's 295,763.

Q: How much memory does each GPU have, and what type?

A: The Ryzen Z2 GPU has 16 GB of LPDDR5X on a 128-bit bus, delivering 119.9 GB/s. The B300 has 288 GB of HBM3e on an 8192-bit bus, delivering 8.19 TB/s.

Q: What are the power requirements recorded for each GPU?

A: The Ryzen Z2 GPU has a 28 W TDP and lists no power connectors. The B300 has a 1100 W TDP and a suggested PSU rating of 1500 W.

Q: Do both GPUs support the same graphics APIs?

A: No. The Ryzen Z2 GPU supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B300 lists N/A for DirectX, OpenGL, and Vulkan, reflecting its server-focused role without display or graphics API support.

Q: What process nodes and die sizes are recorded?

A: The Ryzen Z2 GPU uses a 4 nm TSMC process with a 178 mm² die and 25,390 million transistors. The B300 uses a 5 nm TSMC process with a 1628 mm² die and 208,000 million transistors.

Architecture Differences

The two GPUs share a common foundry, TSMC, but diverge sharply in every architectural choice. The Ryzen Z2 GPU is built on the Hawk Point chip using RDNA 3.0, a graphics-oriented architecture from AMD. It integrates 768 shading units, 48 texture mapping units, 32 ROPs, and 12 ray tracing cores. The B300 is built on the GB110 chip using Blackwell Ultra, an NVIDIA server architecture. It contains 18,944 shading units, 592 texture mapping units, 24 ROPs, and 592 tensor cores, with no dedicated ray tracing core count recorded.

The transistor counts reveal the scale gap. The Ryzen Z2 packs 25,390 million transistors into 178 mm², yielding a transistor density of 142.6 million per mm². The B300 packs 208,000 million transistors into 1628 mm², yielding 127.8 million per mm². Despite the B300's lower density, its absolute transistor count is over eight times higher, and its die is roughly 9.1 times larger.

Clock behavior also differs. The Ryzen Z2 has a base clock of 800 MHz and a boost clock of 2700 MHz. The B300 has a base clock of 1665 MHz and a boost clock of 2032 MHz. The Ryzen part boosts far higher relative to its base, while the B300 runs closer to a sustained server clock. Memory architecture is similarly divergent: the Ryzen uses LPDDR5X at 937 MHz (7.5 Gbps effective), while the B300 uses HBM3e at 2000 MHz (8 Gbps effective).

The B300's memory subsystem spans an 8192-bit bus, which is 64 times wider than the Ryzen's 128-bit bus. That width, combined with HBM3e, produces 8.19 TB/s of bandwidth, versus 119.9 GB/s for the Ryzen. The B300 also carries a PCIe 6.0 x16 bus interface, while the Ryzen lists no bus interface. Display output is present only on the Ryzen, which offers a single USB Type-C output; the B300 lists no outputs.

Specification Differences

The database records several fields where the two GPUs differ directly. The B300 has 18,944 shading units versus 768 for the Ryzen, a 24.7-fold difference. Texture mapping units stand at 592 versus 48, a 12.3-fold difference. ROP counts are closer: 24 for the B300 versus 32 for the Ryzen, meaning the Ryzen actually holds a 33% advantage in ROPs. Ray tracing cores are present on the Ryzen at 12, while the B300 lists none; tensor cores exist only on the B300 at 592.

Pixel and texture rates reflect these counts. The Ryzen achieves 86.40 GPixel/s, while the B300 achieves 48.77 GPixel/s, a 77% advantage for the Ryzen in pixel throughput. Texture rate reverses the order: the B300 reaches 1,202.9 GTexel/s, versus 129.6 GTexel/s for the Ryzen, a 9.3-fold difference.

Memory capacity, type, bus width, and bandwidth all favor the B300. The B300 has 288 GB of HBM3e versus 16 GB of LPDDR5X. The B300's bus width is 8192 bit versus 128 bit. Bandwidth is 8.19 TB/s versus 119.9 GB/s. FP32 and FP16 throughput are identical within each part (1:1 ratios), but the absolute values differ: 76.99 TFLOPS for the B300 versus 8.294 TFLOPS for the Ryzen in both precisions.

Power and physical configuration differ as well. The Ryzen draws 28 W and uses no power connectors; the B300 draws 1100 W and lists a suggested PSU of 1500 W. The B300 is an SXM Module in slot width, while the Ryzen has no slot width recorded. Release dates place the Ryzen at the end of 2024 and the B300 in September 2025. The B300 lists its predecessor as Server Hopper and successor as Server Rubin; the Ryzen lists neither.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between the Ryzen Z2 GPU and the B300. The wins counter shows 0 for both parts, and the head-to-head benchmark array is empty. What exists instead is a single Geekbench OpenCL result for the B300, plus a set of nearest rival comparisons that exclude the Ryzen entirely.

That absence is itself informative. The B300's Geekbench OpenCL score of 369,831 places it at the 100th percentile of all GPUs in the database. Its nearest rival, the NVIDIA B200, scores 345,482, which is 7% lower. The H200 NVL trails by 10.4% at 334,891. The AMD Instinct MI300X trails by 16.3% at 317,994. The NVIDIA L40S trails by 25% at 295,763. These deltas describe a consistent margin: the B300 leads its closest competitor by a single-digit percentage and extends that lead to a quarter over the L40S.

The Ryzen Z2 GPU has no benchmark scores recorded, no average score, and no nearest rivals. Its percentile rank of 50 places it at the median of all GPUs in the database, but without a measured score, that rank cannot be tied to any specific performance level. The database therefore supports a clear quantitative assessment only for the B300.

On raw specification comparison, the B300 dominates in shading units, TMUs, memory capacity, bandwidth, FP32, FP16, and texture rate. The Ryzen wins in ROP count, pixel rate, and boost clock ratio. The B300's FP32 figure of 76.99 TFLOPS is 9.3 times the Ryzen's 8.294 TFLOPS. Its memory bandwidth of 8.19 TB/s is roughly 68 times the Ryzen's 119.9 GB/s. Its texture rate of 1,202.9 GTexel/s is 9.3 times the Ryzen's 129.6 GTexel/s. The Ryzen's pixel rate of 86.40 GPixel/s is 1.77 times the B300's 48.77 GPixel/s.

Power efficiency, computed from recorded data, also separates the parts. The Ryzen delivers 8.294 TFLOPS at 28 W, which is 0.296 TFLOPS per watt. The B300 delivers 76.99 TFLOPS at 1100 W, which is 0.070 TFLOPS per watt. The Ryzen's efficiency advantage is roughly 4.2 times on this metric, though the B300's absolute throughput remains far higher.

The B300's production status is Active, as is the Ryzen's. Both are current products in the database. The B300's nearest rivals all belong to the server accelerator class, confirming its competitive set. The Ryzen has no recorded rivals, which likely reflects its console-oriented positioning rather than any absence of comparable parts in the market.

In summary, the data supports two distinct conclusions. For measured compute performance, the B300 is the clear leader, and its score against the B200, H200 NVL, MI300X, and L40S quantifies that lead. For the Ryzen, the database offers no measured evidence of performance, only a specification sheet that shows a low-power, compact GPU with a strong pixel rate and high boost clock relative to its base. Any head-to-head conclusion between the two would require benchmark data that the database does not currently contain.