AMD Ryzen Z1 GPU vs NVIDIA B300 SXM6 AC Comparison

AMD Ryzen Z1 GPU and NVIDIA B300 SXM6 AC occupy completely different segments of the hardware market, and the recorded data reflects that divide. The Ryzen Z1 GPU is a compact, low-power mobile-class part built for embedded or handheld systems, while the B300 SXM6 AC is a massive server accelerator designed for high-throughput compute environments. Their benchmark results, specifications, and intended roles could not be more distinct.

Where Each One Wins

The AMD Ryzen Z1 GPU wins in the categories of power efficiency and physical footprint. The database shows a 30 W thermal design power for the Ryzen Z1 GPU, compared to the B300 SXM6 AC's 1100 W. This is a 36-fold difference in power draw, making the Ryzen Z1 GPU suitable for battery-powered or thermally constrained designs. The Ryzen Z1 GPU also uses no external power connectors, while the B300 SXM6 AC requires a suggested PSU rating of 1500 W. The physical size difference is equally stark: the Ryzen Z1 GPU measures 280 mm in length, 111 mm in height, and 21 mm in width, whereas the B300 SXM6 AC is an SXM module with no listed dimensions.

The NVIDIA B300 SXM6 AC wins decisively in raw compute performance. The Geekbench OpenCL score for the B300 SXM6 AC is 369,831, placing it in the 100th percentile of all GPUs in the database. The Ryzen Z1 GPU has no recorded benchmark scores and sits at the 50th percentile. The B300 SXM6 AC delivers 76.99 TFLOPS of FP32 performance and 76.99 TFLOPS of FP16 performance (1:1 ratio), while the Ryzen Z1 GPU provides 2.560 TFLOPS FP32 and 5.120 TFLOPS FP16 (2:1 ratio). That is a 30x advantage in FP32 throughput for the NVIDIA part.

Memory capacity and bandwidth also belong to the B300 SXM6 AC. It carries 288 GB of HBM3e memory on a 8192-bit bus, delivering 8.19 TB/s of bandwidth. The Ryzen Z1 GPU has 16 GB of LPDDR5 on a 64-bit bus, yielding 51.20 GB/s. The bandwidth ratio is approximately 160x in favor of the NVIDIA accelerator. For workloads that depend on large datasets or high memory throughput, the B300 SXM6 AC is the only viable option between these two.

The Verdict

The data indicates that these two products serve entirely different purposes and should never be cross-shopped. The AMD Ryzen Z1 GPU is for scenarios where power consumption, physical space, and cost containment are primary constraints. Its 30 W TDP, 178 mm² die size, and lack of display outputs suggest it is meant as a compute co-processor or an integrated-class GPU in a compact system. The 4 nm process node from TSMC and 25,390 million transistors contribute to its efficiency profile.

The NVIDIA B300 SXM6 AC is for server deployments where absolute performance is the priority. Its 1100 W TDP, 1628 mm² die size, and 208,000 million transistors on a 5 nm process node indicate a design that trades efficiency for maximum throughput. The 288 GB memory pool and 8.19 TB/s bandwidth make it suitable for large-scale AI training, scientific simulation, or data center inference workloads. Its nearest rival, the NVIDIA B200, scores 345,482 in the same benchmark, putting the B300 SXM6 AC 7% ahead. The NVIDIA H200 NVL trails by 10.4%, the AMD Instinct MI300X by 16.3%, and the NVIDIA L40S by 25%.

If the choice is between these two, the decision is determined entirely by the workload and power envelope. There is no scenario where the Ryzen Z1 GPU competes with the B300 SXM6 AC on performance, and no scenario where the B300 SXM6 AC competes with the Ryzen Z1 GPU on efficiency.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two products, which is expected given their disparate market positions. However, the available benchmark data for the B300 SXM6 AC provides context. The Geekbench OpenCL score of 369,831 places it above all four listed nearest rivals. The closest competitor, the NVIDIA B200, scores 345,482, a 7% gap. The NVIDIA H200 NVL scores 334,891, 10.4% behind. The AMD Instinct MI300X scores 317,994, 16.3% behind. The NVIDIA L40S scores 295,763, 25% behind.

For the Ryzen Z1 GPU, no benchmark scores are recorded in the database, and its percentile rank of 50 indicates it falls in the middle of the performance distribution for all GPUs tracked. Its FP32 throughput of 2.560 TFLOPS and texture rate of 40.00 GTexel/s are orders of magnitude below the B300 SXM6 AC's 76.99 TFLOPS and 1,202.9 GTexel/s. The pixel rate difference is smaller: 20.00 GPixel/s for the Ryzen Z1 GPU versus 48.77 GPixel/s for the B300 SXM6 AC, a 2.4x gap.

The memory bandwidth disparity is the most pronounced specification difference. The B300 SXM6 AC moves data at 8.19 TB/s, while the Ryzen Z1 GPU manages 51.20 GB/s. For memory-bound tasks, this 160x difference dominates all other considerations. The B300 SXM6 AC also has far more shading units (18,944 versus 256), texture mapping units (592 versus 16), and render output units (24 versus 8). Its tensor core count of 592 has no equivalent on the Ryzen Z1 GPU, which lists no tensor cores at all.

FAQ

Q: Which GPU has higher raw compute performance?

A: The NVIDIA B300 SXM6 AC. It scores 369,831 in Geekbench OpenCL and delivers 76.99 TFLOPS FP32. The AMD Ryzen Z1 GPU has no recorded benchmark score and provides 2.560 TFLOPS FP32.

Q: What is the power consumption difference?

A: The AMD Ryzen Z1 GPU uses 30 W, while the NVIDIA B300 SXM6 AC uses 1100 W. The B300 SXM6 AC also requires a suggested PSU of 1500 W, while the Ryzen Z1 GPU has no external power connectors.

Q: How do memory capacities compare?

A: The NVIDIA B300 SXM6 AC has 288 GB of HBM3e with 8.19 TB/s bandwidth. The AMD Ryzen Z1 GPU has 16 GB of LPDDR5 with 51.20 GB/s bandwidth.

Q: Does the Ryzen Z1 GPU have tensor cores?

A: No. The database lists no tensor cores for the Ryzen Z1 GPU. The NVIDIA B300 SXM6 AC has 592 tensor cores.

Q: Which chip has a smaller manufacturing process?

A: The AMD Ryzen Z1 GPU uses a 4 nm process node from TSMC. The NVIDIA B300 SXM6 AC uses a 5 nm process node, also from TSMC.

Q: What is the performance gap to the B300 SXM6 AC's nearest rival?

A: The B300 SXM6 AC scores 7% higher than the NVIDIA B200, 10.4% higher than the NVIDIA H200 NVL, 16.3% higher than the AMD Instinct MI300X, and 25% higher than the NVIDIA L40S.

Architecture Differences

The AMD Ryzen Z1 GPU uses the Phoenix chip with RDNA 3.0 architecture, placing it in the Console GPU generation for AMD. It is built on a 4 nm process at TSMC and contains 25,390 million transistors on a 178 mm² die. The transistor density is 142.6 million per square millimeter. It has 256 shading units, 16 TMUs, 8 ROPs, and 4 ray tracing cores. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The NVIDIA B300 SXM6 AC uses the GB110 chip with Blackwell Ultra architecture, part of the Server Blackwell (Bxx) generation. It is built on a 5 nm process at TSMC and contains 208,000 million transistors on a 1628 mm² die. The transistor density is 127.8 million per square millimeter. It has 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. It does not list ray tracing core counts, and its API support is marked as N/A for DirectX, OpenGL, and Vulkan, reflecting its server-oriented design.

The architectural philosophies diverge sharply. The RDNA 3.0 design in the Ryzen Z1 GPU emphasizes efficiency and compactness, evidenced by its low transistor count, small die, and low TDP. The Blackwell Ultra design in the B300 SXM6 AC emphasizes sheer scale, with a die size nearly ten times larger and a transistor count over eight times higher. The B300 SXM6 AC also lists a predecessor (Server Hopper) and successor (Server Rubin), while the Ryzen Z1 GPU has neither, suggesting it is a standalone part.

Specification Differences

The two products differ in nearly every measurable specification. The AMD Ryzen Z1 GPU runs at a base clock of 1500 MHz and a boost clock of 2500 MHz, while the NVIDIA B300 SXM6 AC runs at 1665 MHz base and 2032 MHz boost. Memory type differs: LPDDR5 for the Ryzen Z1 GPU versus HBM3e for the B300 SXM6 AC. Memory bus width is 64 bit versus 8192 bit. Memory effective speed is 6.4 Gbps for the Ryzen Z1 GPU and 8 Gbps for the B300 SXM6 AC.

The FP32 compute figures are 2.560 TFLOPS for the Ryzen Z1 GPU and 76.99 TFLOPS for the B300 SXM6 AC. FP16 performance is 5.120 TFLOPS (2:1) versus 76.99 TFLOPS (1:1). Texture rate is 40.00 GTexel/s versus 1,202.9 GTexel/s. Pixel rate is 20.00 GPixel/s versus 48.77 GPixel/s.

The B300 SXM6 AC uses a PCIe 6.0 x16 bus interface, while the Ryzen Z1 GPU lists no bus interface. The B300 SXM6 AC is an SXM module, while the Ryzen Z1 GPU has physical dimensions of 280 mm length, 111 mm height, and 21 mm width. The Ryzen Z1 GPU has a launch MSRP of 599 USD, while the B300 SXM6 AC has no recorded launch MSRP.

The release dates are separated by two years: the Ryzen Z1 GPU released on September 17, 2023, and the B300 SXM6 AC released on September 10, 2025. Both are listed as Active in production status. Both have no display outputs. The Ryzen Z1 GPU supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, while the B300 SXM6 AC lists N/A for all three APIs.