NVIDIA B300 SXM6 AC vs NVIDIA GeForce RTX 5080 SUPER Comparison

FAQ

Q: What is the NVIDIA B300 SXM6 AC?

A: It is a server accelerator built on the Blackwell Ultra architecture with the GB110 chip. It uses a 5 nm process at TSMC, packs 208,000 million transistors on a 1628 mm² die, and comes in an SXM module form factor with no display outputs.

Q: What is the NVIDIA GeForce RTX 5080 SUPER?

A: It is a GeForce 50-series consumer graphics card based on the Blackwell 2.0 architecture with the GB203 chip. It uses the same 5 nm TSMC process but a much smaller 378 mm² die with 45,600 million transistors, and it is a dual-slot card with display outputs.

Q: How do their memory configurations compare?

A: The B300 SXM6 AC has 288 GB of HBM3e memory on an 8192-bit bus with 8.19 TB/s of bandwidth. The RTX 5080 SUPER has 24 GB of GDDR7 memory on a 256-bit bus with 1.02 TB/s of bandwidth.

Q: Which card has higher clock speeds?

A: The RTX 5080 SUPER runs at a 2295 MHz base and 2617 MHz boost clock. The B300 SXM6 AC runs lower at 1665 MHz base and 2032 MHz boost.

Q: What is the performance percentile for each card?

A: The B300 SXM6 AC sits at the 100th percentile among all GPUs in the database. The RTX 5080 SUPER is at the 19th percentile, though its benchmark test differs from the server card's test.

Q: What are the power requirements?

A: The B300 SXM6 AC has a TDP of 1100 W and a suggested PSU of 1500 W. The RTX 5080 SUPER has a TDP of 415 W and uses a single 16-pin power connector.

Architecture Differences

The two cards come from different branches of NVIDIA's Blackwell family. The B300 SXM6 AC uses the Blackwell Ultra architecture with the GB110 chip, positioned in the Server Blackwell (Bxx) generation. The RTX 5080 SUPER uses Blackwell 2.0 with the GB203 chip, in the GeForce 50 generation. Both are fabricated on a 5 nm process at TSMC, but that is where the similarity ends.

Transistor counts differ enormously. The B300 SXM6 AC holds 208,000 million transistors on a 1628 mm² die, yielding a transistor density of 127.8 million per mm². The RTX 5080 SUPER has just 45,600 million transistors on a 378 mm² die, with a density of 120.6 million per mm². The B300's die is over four times larger and carries nearly five times more transistors.

Compute resources also diverge sharply. The B300 SXM6 AC has 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. The RTX 5080 SUPER has 10,752 shading units, 336 TMUs, 112 ROPs, 84 RT cores, and 336 tensor cores. The B300 has more shading units and TMUs, but the RTX 5080 SUPER has far more ROPs and adds dedicated ray tracing cores.

Clock behavior reflects their different missions. The B300 runs at 1665 MHz base and 2032 MHz boost, prioritizing sustained throughput over raw frequency. The RTX 5080 SUPER runs at 2295 MHz base and 2617 MHz boost, a substantial clock advantage that helps consumer workloads.

Memory architecture is fundamentally different. The B300 uses 288 GB of HBM3e across an 8192-bit bus, achieving 8.19 TB/s bandwidth. The RTX 5080 SUPER uses 24 GB of GDDR7 across a 256-bit bus, achieving 1.02 TB/s. The B300 offers 12 times the capacity and eight times the bandwidth.

API support separates them. The B300 reports N/A for DirectX, OpenGL, and Vulkan, as it is a compute-focused server part with no display output. The RTX 5080 SUPER supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The bus interface also differs: PCIe 6.0 x16 on the B300 versus PCIe 5.0 x16 on the RTX 5080 SUPER.

Head-to-Head Benchmarks

The database contains no shared benchmark tests between these two cards, so a direct head-to-head comparison relies on their respective recorded scores and nearest rivals. The B300 SXM6 AC has one benchmark result: Geekbench OpenCL at 369,831. The RTX 5080 SUPER has one result: 3DMark Steel Nomad DX12 at 3,075.

The B300 SXM6 AC sits at the 100th percentile among all GPUs in the database. Its nearest rival is the NVIDIA B200 with an average score of 345,482, which is 7% lower. The H200 NVL scores 334,891, 10.4% behind. The AMD Instinct MI300X scores 317,994, 16.3% behind. The L40S scores 295,763, 25% behind. These deltas show the B300 leading its closest server competitors by a clear margin.

The RTX 5080 SUPER sits at the 19th percentile. Its nearest rivals are clustered closely around its score. The Intel Arc Pro B60 scores 3,182, which is 3.4% higher. The NVIDIA Quadro P1000 scores 3,163, 2.8% higher. The NVIDIA GeForce 820A scores 2,983, 3.1% lower. The GeForce GTX 860M scores 2,967, 3.6% lower. These are small differences, indicating the RTX 5080 SUPER's benchmark result lands in a tight pack.

The B300's OpenCL score of 369,831 is more than 100 times larger than the RTX 5080 SUPER's 3DMark score, but the tests measure different workloads and are not directly comparable. The B300's position at the 100th percentile versus the RTX 5080 SUPER's 19th percentile reflects their different performance classes. The B300 is designed for maximum compute throughput, while the RTX 5080 SUPER targets consumer graphics.

In raw FP32 throughput, the B300 delivers 76.99 TFLOPS, while the RTX 5080 SUPER delivers 56.28 TFLOPS. The B300 leads by roughly 37% in this metric. FP16 follows the same pattern at 76.99 TFLOPS versus 56.28 TFLOPS, both at 1:1 ratios.

Pixel and texture rates favor different cards. The B300 has a pixel rate of 48.77 GPixel/s and a texture rate of 1,202.9 GTexel/s. The RTX 5080 SUPER has a pixel rate of 293.1 GPixel/s, which is roughly six times higher, and a texture rate of 879.3 GTexel/s, which is lower. The RTX 5080 SUPER's higher clocks and larger ROP count drive its pixel rate advantage.

The Verdict

The data separates these two cards into distinct roles with no overlap. The NVIDIA B300 SXM6 AC is a server accelerator with a 100th percentile standing, massive memory capacity, and leading compute throughput among its rivals. The NVIDIA GeForce RTX 5080 SUPER is a consumer graphics card with display outputs, ray tracing cores, and a 19th percentile standing in its own benchmark.

The B300 SXM6 AC should be chosen for compute-heavy server workloads. Its 288 GB of HBM3e memory, 8.19 TB/s bandwidth, and 76.99 TFLOPS FP32 performance place it ahead of the B200 by 7%, the H200 NVL by 10.4%, the MI300X by 16.3%, and the L40S by 25%. Its 1100 W TDP and 1500 W suggested PSU indicate a data center power envelope.

The RTX 5080 SUPER should be chosen for consumer graphics and gaming. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and it includes 84 RT cores. Its 24 GB of GDDR7 memory and 1.02 TB/s bandwidth serve typical graphics workloads. Its 415 W TDP and dual-slot form factor fit a desktop build.

Neither card is a substitute for the other. The B300 has no display outputs and no graphics API support, so it cannot drive a monitor. The RTX 5080 SUPER lacks the memory capacity and bandwidth needed for the B300's target workloads. The database shows two specialized products, each leading in its own domain.

Specification Differences

The two cards differ across nearly every recorded specification. The B300 SXM6 AC uses the GB110 chip with Blackwell Ultra architecture, while the RTX 5080 SUPER uses the GB203 chip with Blackwell 2.0 architecture. Their generations differ: Server Blackwell (Bxx) versus GeForce 50.

Transistor count: 208,000 million on the B300 versus 45,600 million on the RTX 5080 SUPER. Die size: 1628 mm² versus 378 mm². Transistor density: 127.8 million per mm² versus 120.6 million per mm².

Clocks: the B300 runs at 1665 MHz base and 2032 MHz boost. The RTX 5080 SUPER runs at 2295 MHz base and 2617 MHz boost. Memory clocks differ in effective rate: 8 Gbps on the B300 versus 32 Gbps on the RTX 5080 SUPER.

Memory: 288 GB HBM3e on an 8192-bit bus with 8.19 TB/s bandwidth versus 24 GB GDDR7 on a 256-bit bus with 1.02 TB/s bandwidth.

Compute units: the B300 has 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. The RTX 5080 SUPER has 10,752 shading units, 336 TMUs, 112 ROPs, 84 RT cores, and 336 tensor cores.

Rates: the B300 delivers 48.77 GPixel/s and 1,202.9 GTexel/s. The RTX 5080 SUPER delivers 293.1 GPixel/s and 879.3 GTexel/s. FP32 and FP16 are 76.99 TFLOPS on the B300 versus 56.28 TFLOPS on the RTX 5080 SUPER.

Power and physical: the B300 has a 1100 W TDP, SXM module slot width, and no power connector listed. The RTX 5080 SUPER has a 415 W TDP, dual-slot width, and a single 16-pin connector. The RTX 5080 SUPER is 304 mm long, 137 mm tall, and 40 mm wide.

Interface and outputs: the B300 uses PCIe 6.0 x16 with no display outputs. The RTX 5080 SUPER uses PCIe 5.0 x16 with 1x HDMI 2.1b and 3x DisplayPort 2.1b. API support: the B300 has N/A for all graphics APIs, while the RTX 5080 SUPER supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Release dates: the B300 released on September 10, 2025, while the RTX 5080 SUPER released on December 31, 2025. The B300 lists a predecessor (Server Hopper) and successor (Server Rubin). The RTX 5080 SUPER lists neither.

Where Each One Wins

The B300 SXM6 AC wins in raw compute throughput. Its FP32 of 76.99 TFLOPS exceeds the RTX 5080 SUPER's 56.28 TFLOPS. Its texture rate of 1,202.9 GTexel/s beats the RTX 5080 SUPER's 879.3 GTexel/s. Its memory bandwidth of 8.19 TB/s is eight times higher, and its 288 GB capacity dwarfs the RTX 5080 SUPER's 24 GB.

The B300 also wins in server-relative standing. It leads its nearest rival, the B200, by 7%, and extends that lead to 10.4% over the H200 NVL, 16.3% over the MI300X, and 25% over the L40S. Its 100th percentile position confirms top-tier placement among all GPUs in the database.

The RTX 5080 SUPER wins in graphics-oriented features. It has dedicated RT cores, display outputs, and full graphics API support. Its pixel rate of 293.1 GPixel/s is roughly six times higher than the B300's 48.77 GPixel/s, driven by its higher boost clock of 2617 MHz and 112 ROPs.

The RTX 5080 SUPER also wins in clock speed. Its 2295 MHz base and 2617 MHz boost are substantially higher than the B300's 1665 MHz base and 2032 MHz boost. For workloads that favor high clocks over massive parallelism, this matters.

The RTX 5080 SUPER's benchmark rivals are tightly grouped. Its score of 3,075 sits within 3.6% of the GeForce 820A and within 3.4% of the Arc Pro B60. This suggests competitive positioning within its consumer segment.

For memory-bound workloads, the B300 dominates. Its 8.19 TB/s bandwidth and 288 GB capacity support large models and datasets that the RTX 5080 SUPER cannot accommodate. For latency-sensitive graphics workloads, the RTX 5080 SUPER's higher clocks and ROP count provide an advantage.

The choice depends on the workload. Server compute and large-scale AI favor the B300 SXM6 AC. Consumer graphics, ray tracing, and display output favor the RTX 5080 SUPER. The database shows no overlap in their intended applications.