AMD Radeon PRO W7800 48 GB vs NVIDIA Rubin GPU Comparison

Where Each One Wins

The recorded data presents two fundamentally different computing devices with no overlapping benchmark results in the database. The AMD Radeon PRO W7800 48 GB is a workstation graphics card built for rendering, display output, and professional visualization workloads. The NVIDIA Rubin GPU is a server-class accelerator with no display outputs, designed for compute-intensive environments. Neither device has recorded benchmark scores or nearest rival comparisons in the database, so the analysis here relies entirely on architectural specifications and measured performance parameters.

The AMD Radeon PRO W7800 wins in every category related to traditional graphics rendering and display connectivity. It delivers 45.25 TFLOPS of FP32 compute, which is its primary rasterization and shading throughput. The card outputs to three DisplayPort 2.1 connectors and one mini-DisplayPort 2.1, making it suitable for multi-monitor professional visualization. Its pixel rate of 323.2 GPixel/s and texture rate of 707.0 GTexel/s indicate strong fill-rate capabilities for high-resolution rendering tasks. The 48 GB GDDR6 memory with 864.0 GB/s bandwidth provides ample capacity for large 3D scenes, though the bandwidth is modest compared to server-class alternatives.

The NVIDIA Rubin GPU wins in raw compute throughput and memory bandwidth by substantial margins. Its FP32 performance reaches 130.0 TFLOPS, which is approximately 2.87 times the W7800's figure. The FP16 performance of 260.0 TFLOPS doubles the FP32 rate, indicating a 2:1 ratio optimized for mixed-precision AI workloads. The Rubin GPU's 288 GB HBM4 memory delivers 22.1 TB/s of bandwidth, which is roughly 25.6 times the W7800's bandwidth. These specifications point to a device engineered for large-scale AI training, scientific simulation, and data center inference, not for interactive graphics.

The use-case split is clear from the data. The W7800 targets workstation graphics with full API support including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The Rubin GPU has no graphics API support listed, confirming its role as a compute-only accelerator. The W7800 has 128 ROPs and 70 RT cores for ray tracing and rasterization, while the Rubin GPU has only 24 ROPs and no listed RT cores. Instead, the Rubin GPU provides 896 tensor cores for matrix operations, a feature entirely absent from the W7800's specification.

Architecture Differences

The two devices come from different manufacturers and represent distinct architectural philosophies. The AMD Radeon PRO W7800 uses the Navi 31 chip built on the RDNA 3.0 architecture, with the codename "Plum Bonito." It belongs to the Radeon Pro Navi generation and is manufactured on a 5 nm process at TSMC. The chip contains 57,700 million transistors on a 529 mm² die, resulting in a transistor density of 109.1 million transistors per square millimeter.

The NVIDIA Rubin GPU uses the GR100 chip on the Rubin architecture, belonging to the Server Rubin generation. It is manufactured on a 3 nm process at TSMC, a smaller node that enables higher density. The chip packs 336,000 million transistors on a 1456 mm² die, which is nearly three times the die area of the W7800. The transistor density reaches 230.8 million per square millimeter, more than double the W7800's density.

The memory architectures differ fundamentally. The W7800 uses GDDR6 memory on a 384-bit bus, operating at 2250 MHz with 18 Gbps effective data rate. The Rubin GPU uses HBM4 memory on a massive 16384-bit bus, operating at 2695 MHz with 10.8 Gbps effective data rate. The combination of wider bus and higher capacity yields the 22.1 TB/s bandwidth figure. Memory capacity also diverges sharply, with 48 GB versus 288 GB.

Compute resources show significant structural differences. The W7800 has 4480 shading units, 280 texture mapping units, and 128 ROPs. The Rubin GPU has 28672 shading units, 896 texture mapping units, and only 24 ROPs. The low ROP count on the Rubin GPU indicates it is not designed for pixel-heavy graphics workloads. The W7800 includes 70 RT cores for ray tracing, while the Rubin GPU lists no RT cores. Conversely, the Rubin GPU provides 896 tensor cores, which the W7800 lacks entirely.

Clock speeds also diverge. The W7800 has a base clock of 1895 MHz and a boost clock of 2525 MHz. The Rubin GPU has a much lower base clock of 700 MHz but a boost clock of 2267 MHz. The lower base clock suggests the Rubin GPU may idle at very low frequencies to manage its 2300 W thermal design power, while the W7800's 281 W TDP allows for higher sustained base clocks.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark results for these two devices, so the comparison must draw from their recorded specification-based performance metrics. The most striking difference appears in FP32 throughput. The Rubin GPU delivers 130.0 TFLOPS compared to the W7800's 45.25 TFLOPS, a 2.87 times advantage. This positions the Rubin GPU as substantially faster for single-precision compute tasks such as physics simulation, scientific computing, and general GPU compute.

In FP16 performance, the gap widens further. The Rubin GPU achieves 260.0 TFLOPS with a 2:1 FP16 to FP32 ratio, while the W7800 delivers 45.25 TFLOPS with a 1:1 ratio. The Rubin GPU's FP16 output is 5.75 times higher than the W7800's. This substantial advantage directly supports deep learning training and inference workloads that rely on reduced precision arithmetic.

Memory bandwidth presents the largest proportional difference. The Rubin GPU's 22.1 TB/s bandwidth exceeds the W7800's 864.0 GB/s by a factor of approximately 25.6. For memory-bound workloads such as large language model inference or scientific data processing, this bandwidth advantage would dominate performance outcomes. The 288 GB memory capacity also allows the Rubin GPU to hold far larger datasets and models in memory without spilling to slower storage.

Texture rate favors the Rubin GPU with 2,031.2 GTexel/s versus the W7800's 707.0 GTexel/s, a 2.87 times advantage that mirrors the FP32 ratio. However, pixel rate tells a different story. The W7800 achieves 323.2 GPixel/s, while the Rubin GPU manages only 54.41 GPixel/s. The W7800's pixel rate is 5.94 times higher, confirming its superiority in rasterization and display-oriented workloads. The Rubin GPU's 24 ROPs severely limit its pixel throughput, making it unsuitable for traditional graphics rendering.

The W7800 draws 281 W of power with a recommended 600 W power supply, while the Rubin GPU has a 2300 W TDP and requires a 2700 W power supply. The Rubin GPU's power consumption is 8.18 times higher. When considering performance per watt for FP32, the W7800 delivers approximately 0.161 TFLOPS per watt, while the Rubin GPU delivers approximately 0.0565 TFLOPS per watt. The W7800 is about 2.85 times more power-efficient for FP32 compute, though the Rubin GPU's absolute performance remains far higher.

The Verdict

The data supports a straightforward conclusion: these devices serve different purposes and should be selected based on workload requirements. The AMD Radeon PRO W7800 is the appropriate choice for professional graphics work that demands display output, high pixel throughput, and full graphics API support. Its 323.2 GPixel/s pixel rate, 70 RT cores, and four DisplayPort 2.1 outputs make it suitable for 3D modeling, visualization, and rendering workstations. The 48 GB GDDR6 memory provides sufficient capacity for large scenes, and the 281 W TDP allows deployment in conventional workstation power envelopes.

The NVIDIA Rubin GPU is the appropriate choice for compute environments where raw FP32 or FP16 throughput and memory bandwidth are the primary constraints. Its 130.0 TFLOPS FP32 and 260.0 TFLOPS FP16 performance, combined with 22.1 TB/s bandwidth and 288 GB HBM4 capacity, target AI training, scientific simulation, and data center compute. The absence of display outputs and graphics API support confirms its server-oriented design. The 2300 W TDP and SXM module form factor indicate deployment in dedicated compute racks with appropriate cooling and power infrastructure.

Neither device can substitute for the other in their respective domains. The W7800 cannot approach the Rubin GPU's compute throughput or memory bandwidth for large-scale parallel workloads. The Rubin GPU cannot perform interactive graphics rendering due to its low pixel rate and missing display outputs. Organizations requiring both capabilities would need separate systems for each workload type.

FAQ

Q: Which device has higher FP32 performance?

A: The NVIDIA Rubin GPU delivers 130.0 TFLOPS of FP32 compute, which is 2.87 times higher than the AMD Radeon PRO W7800's 45.25 TFLOPS.

Q: What memory bandwidth does each device provide?

A: The AMD Radeon PRO W7800 provides 864.0 GB/s of bandwidth from 48 GB of GDDR6 memory on a 384-bit bus. The NVIDIA Rubin GPU provides 22.1 TB/s of bandwidth from 288 GB of HBM4 memory on a 16384-bit bus.

Q: Can the NVIDIA Rubin GPU output to displays?

A: No, the NVIDIA Rubin GPU has no display outputs listed in the database. The AMD Radeon PRO W7800 provides three DisplayPort 2.1 connectors and one mini-DisplayPort 2.1 connector.

Q: What graphics APIs does each device support?

A: The AMD Radeon PRO W7800 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA Rubin GPU has no graphics API support listed in the database.

Q: How do the power requirements compare?

A: The AMD Radeon PRO W7800 has a 281 W TDP with a suggested 600 W power supply. The NVIDIA Rubin GPU has a 2300 W TDP with a suggested 2700 W power supply.

Q: Which device includes tensor cores?

A: The NVIDIA Rubin GPU includes 896 tensor cores. The AMD Radeon PRO W7800 has no tensor cores listed in its specification.

Specification Differences

The two devices differ in nearly every recorded specification field. The AMD Radeon PRO W7800 uses the Navi 31 chip with RDNA 3.0 architecture, while the NVIDIA Rubin GPU uses the GR100 chip with the Rubin architecture. Manufacturing processes differ with the W7800 on 5 nm and the Rubin GPU on 3 nm, both at TSMC. Transistor counts diverge substantially with 57,700 million for the W7800 and 336,000 million for the Rubin GPU. Die sizes measure 529 mm² for the W7800 and 1456 mm² for the Rubin GPU.

Clock speeds differ across all ranges. The W7800 has base and boost clocks of 1895 MHz and 2525 MHz respectively. The Rubin GPU has base and boost clocks of 700 MHz and 2267 MHz. Memory clocks also differ with the W7800 running at 2250 MHz (18 Gbps effective) and the Rubin GPU at 2695 MHz (10.8 Gbps effective).

Compute unit counts vary significantly. The W7800 has 4480 shading units, 280 TMUs, and 128 ROPs. The Rubin GPU has 28672 shading units, 896 TMUs, and 24 ROPs. Ray tracing cores exist only on the W7800 with 70 units, while tensor cores exist only on the Rubin GPU with 896 units.

Form factor and connectivity differ completely. The W7800 is a dual-slot PCIe 4.0 x16 card with 2x 8-pin power connectors. The Rubin GPU is an SXM module using PCIe 6.0 x16 with no power connectors listed. The W7800 measures 280 mm in length, 110 mm in height, and 40 mm in width. No dimensions are recorded for the Rubin GPU.

Release timing and lineage also differ. The W7800 was released on November 14, 2024, with a predecessor of Radeon Pro Vega and a launch MSRP of 2,499 USD. The Rubin GPU has a release date of December 31, 2025, with a predecessor of Server Blackwell and no launch MSRP recorded. Both devices are listed as Active in production status.