AMD Radeon PRO W7900D vs NVIDIA N1X 48SM Comparison

The Verdict

The database places both the AMD Radeon PRO W7900D and the NVIDIA N1X 48SM at the 50th percentile among all GPUs, with an average benchmark score of 0 for each. The two parts are essentially matched in overall standing, but the recorded specifications reveal two sharply different design philosophies. The AMD Radeon PRO W7900D is a conventional triple-slot workstation card built to push raw compute throughput, while the NVIDIA N1X 48SM is an integrated graphics processor (IGP) with an enormous memory pool.

For users seeking maximum floating-point performance and high-bandwidth dedicated memory in a standard add-in card format, the AMD Radeon PRO W7900D is the clear choice from the data. It delivers nearly double the FP32 throughput and more than three times the memory bandwidth of the NVIDIA part. For systems that prioritize memory capacity, integrated power delivery with no external connectors, and a PCIe 5.0 interface, the NVIDIA N1X 48SM holds the advantage. The N1X 48SM also offers tensor cores, which the AMD part lacks entirely.

The choice depends entirely on whether the workload favors compute density or memory footprint and integration. The AMD part is a discrete workstation GPU with a 295 W TDP and dual 8-pin power connectors. The NVIDIA part is an IGP with no power connectors and unknown power consumption. There is no single winner across all metrics; the data shows two specialized tools.

Where Each One Wins

The AMD Radeon PRO W7900D wins decisively in raw compute throughput. Its FP32 performance is 52.99 TFLOPS, compared to 28.83 TFLOPS for the NVIDIA N1X 48SM. That is an 83.7% advantage for AMD. FP16 performance follows the same pattern, with the AMD part again delivering 52.99 TFLOPS versus 28.83 TFLOPS, since both cards offer 1:1 FP16 to FP32 ratios. The AMD card also achieves a pixel rate of 414.0 GPixel/s against 112.6 GPixel/s for NVIDIA, a 267.7% difference. Memory bandwidth is another major win: 864.0 GB/s over a 384-bit bus versus 273.2 GB/s over a 256-bit bus for the NVIDIA part. The AMD card uses faster GDDR6 memory at 18 Gbps effective, while the NVIDIA part uses LPDDR5X at 8.5 Gbps effective. The AMD card also has four times the ROP count, 192 versus 48, and double the RT cores, 96 versus 48.

The NVIDIA N1X 48SM wins in memory capacity, offering 128 GB of LPDDR5X compared to 48 GB of GDDR6 on the AMD card. That is more than 2.6 times the memory capacity. The NVIDIA part also has 192 tensor cores, a feature entirely absent from the AMD specification sheet. The NVIDIA IGP uses a PCIe 5.0 x16 bus interface, while the AMD card uses PCIe 4.0 x16. The NVIDIA part has a higher boost clock at 2346 MHz versus 2156 MHz for AMD, though its base clock is much lower at 741 MHz versus 1327 MHz. The texture rate slightly favors NVIDIA at 900.9 GTexel/s versus 827.9 GTexel/s, a difference of 8.8%. The NVIDIA part is an IGP with no power connectors and no slot width, which makes it suitable for systems where a discrete card cannot be installed. The AMD card is triple-slot, 280 mm long, 110 mm tall, and 51 mm wide, requiring a 600 W suggested power supply.

Architecture Differences

The AMD Radeon PRO W7900D uses the Navi 31 chip built on TSMC's 5 nm process with the RDNA 3.0 architecture. The chip is codenamed Plum Bonito and belongs to the Radeon Pro Navi (Navi III Series) generation. It contains 57,700 million transistors on a 529 mm² die, giving a transistor density of 109.1 million transistors per square millimeter. The NVIDIA N1X 48SM uses the GB20B chip, also on TSMC's 5 nm process, with the Blackwell 2.0 architecture. It belongs to the Blackwell IGP (N1x) generation and has a die size of 382 mm². The transistor count for the NVIDIA chip is not recorded in the database.

Both parts have 6144 shading units and 384 texture mapping units. The similarity ends there. The AMD card has 192 ROPs and 96 ray tracing cores, while the NVIDIA card has 48 ROPs and 48 ray tracing cores. The NVIDIA card is the only one with tensor cores, totaling 192. Memory subsystems differ fundamentally: AMD uses 48 GB of GDDR6 on a 384-bit bus, while NVIDIA uses 128 GB of LPDDR5X on a 256-bit bus. The memory clock for AMD is 2250 MHz with 18 Gbps effective data rate; NVIDIA runs at 1067 MHz with 8.5 Gbps effective.

API support also diverges. The AMD card supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA card records DirectX, OpenGL, and Vulkan as N/A, indicating no conventional graphics API support in the database. Display outputs differ as well: the AMD card provides three DisplayPort 2.1 connectors and one mini-DisplayPort 2.1, while the NVIDIA card provides a single HDMI output. The AMD card is a discrete triple-slot unit with two 8-pin power connectors and a 295 W TDP, while the NVIDIA part is an IGP with no power connectors and an unknown TDP. The AMD card was released on 2025-09-24, and the NVIDIA part on 2026-05-31. The AMD card lists the Radeon Pro Vega as its predecessor; the NVIDIA card has no recorded predecessor or successor.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Radeon PRO W7900D delivers 52.99 TFLOPS FP32, while the NVIDIA N1X 48SM delivers 28.83 TFLOPS. The AMD part is 83.7% ahead.

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

A: The AMD Radeon PRO W7900D has 48 GB of GDDR6 on a 384-bit bus with 864.0 GB/s bandwidth. The NVIDIA N1X 48SM has 128 GB of LPDDR5X on a 256-bit bus with 273.2 GB/s bandwidth.

Q: Does the NVIDIA N1X 48SM support graphics APIs like DirectX or Vulkan?

A: No. The database records DirectX, OpenGL, and Vulkan as N/A for the NVIDIA N1X 48SM. The AMD Radeon PRO W7900D supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which GPU has tensor cores?

A: The NVIDIA N1X 48SM has 192 tensor cores. The AMD Radeon PRO W7900D specification lists no tensor cores.

Q: What are the power requirements for each card?

A: The AMD Radeon PRO W7900D has a 295 W TDP, uses two 8-pin power connectors, and has a suggested power supply of 600 W. The NVIDIA N1X 48SM has an unknown TDP and no power connectors.

Q: Which GPU has more ray tracing cores?

A: The AMD Radeon PRO W7900D has 96 ray tracing cores, double the 48 found on the NVIDIA N1X 48SM.

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark results between these two parts, and neither has an average benchmark score above zero. However, the specification data provides a basis for comparing their theoretical peak capabilities.

The largest single advantage belongs to AMD in pixel throughput. The Radeon PRO W7900D achieves 414.0 GPixel/s, which is 267.7% higher than the N1X 48SM's 112.6 GPixel/s. This difference stems from the AMD card's 192 ROPs versus 48 on the NVIDIA part. For fill-rate-bound rendering workloads, the AMD card has a decisive edge.

Memory bandwidth is the second-largest gap. The AMD card's 864.0 GB/s is 216.3% higher than the NVIDIA part's 273.2 GB/s. The AMD card uses a 384-bit bus with GDDR6 running at 18 Gbps effective, while the NVIDIA part uses a 256-bit bus with LPDDR5X at 8.5 Gbps effective. Despite the NVIDIA part's larger capacity, its bandwidth is substantially lower.

FP32 compute favors AMD by 83.7%, with 52.99 TFLOPS versus 28.83 TFLOPS. FP16 compute shows the identical margin, also 52.99 TFLOPS versus 28.83 TFLOPS, because both parts use a 1:1 ratio. The NVIDIA part's tensor cores are not quantified in TFLOPS in the database, so their compute contribution cannot be compared numerically.

The NVIDIA part wins in texture rate by a narrow margin. It delivers 900.9 GTexel/s versus 827.9 GTexel/s for AMD, an 8.8% advantage. Both have 384 TMUs, so the difference comes from the NVIDIA part's higher boost clock of 2346 MHz versus 2156 MHz. The AMD part has a higher base clock of 1327 MHz versus 741 MHz, but boost clocks determine peak texture throughput.

Memory capacity is the NVIDIA part's other clear win. Its 128 GB is 166.7% larger than the AMD card's 48 GB. This capacity difference, combined with the IGP form factor, positions the NVIDIA part for memory-heavy workloads that do not require peak bandwidth.

The remaining comparisons favor AMD. The AMD card has 96 RT cores versus 48, double the count. The AMD card supports three DisplayPort 2.1 outputs plus one mini-DisplayPort 2.1, while the NVIDIA part has a single HDMI output. The AMD card uses PCIe 4.0 x16, while the NVIDIA part uses PCIe 5.0 x16, which gives NVIDIA the newer bus standard. The AMD card has a transistor density of 109.1 million transistors per square millimeter; the NVIDIA part's density is not recorded.

Both parts share the 5 nm TSMC process and the same shading unit and TMU counts. The AMD card is larger at 529 mm² versus 382 mm², and it carries 57,700 million transistors, while the NVIDIA transistor count is unknown. The AMD card is a triple-slot discrete card with a 295 W TDP and a 600 W suggested PSU, while the NVIDIA part is an IGP with no power connectors and no suggested PSU recorded.

The data indicates that the AMD Radeon PRO W7900D is the superior choice for rasterization, ray tracing, and raw FP32 throughput. The NVIDIA N1X 48SM is the better fit for workloads that need 128 GB of memory, tensor core acceleration, and a PCIe 5.0 interface in an integrated form factor. Neither part dominates across every measured specification.