AMD Radeon RX 7400 OEM vs NVIDIA B300 Comparison

AMD Radeon RX 7400 OEM and NVIDIA B300 occupy opposite ends of the GPU spectrum. The RX 7400 OEM is a low-power, compact RDNA 3.0 part designed for basic display output and light rendering workloads. The B300 is a massive server accelerator built on Blackwell Ultra architecture, engineered for high-throughput compute and AI tasks. The recorded data shows no direct head-to-head benchmark overlap, so the analysis relies on architectural and specification differences to determine where each part wins.

Where Each One Wins

The AMD Radeon RX 7400 OEM wins in scenarios requiring a dedicated display output. It provides 1x HDMI 2.1a and 3x DisplayPort 2.1 connectors, while the NVIDIA B300 has no display outputs at all. Any workload involving direct video signal output, multi-monitor setups, or consumer graphics rendering must use the RX 7400 OEM. The B300 cannot present an image to a screen without an additional GPU.

The RX 7400 OEM also wins on power efficiency in absolute terms. Its thermal design power is 55 W, compared to 1400 W for the B300. The suggested power supply is 250 W for the AMD part versus 1800 W for the NVIDIA part. The AMD card uses a single 6-pin power connector, while the B300 is an SXM Module with no user-facing power connector listed. Systems with limited power delivery or small form factor constraints favor the RX 7400 OEM.

The NVIDIA B300 wins in raw compute density. The B300 delivers 76.99 TFLOPS FP32 performance and 1,231.8 TFLOPS FP16 performance, dwarfing the RX 7400 OEM's 7.885 TFLOPS for both FP32 and FP16. The B300 has 144 GB of HBM3e memory with 4.10 TB/s bandwidth. The RX 7400 OEM has 8 GB of GDDR6 with 172.8 GB/s bandwidth. For large dataset processing, AI inference, or high-precision floating-point work, the B300 is the only viable choice.

The B300 also wins on memory capacity and bandwidth by orders of magnitude. It has 18 times the memory capacity of the RX 7400 OEM and roughly 24 times the memory bandwidth. The B300's 4096-bit memory bus versus the RX 7400 OEM's 128-bit bus reflects the server-oriented design. The B300 is built for data center workloads where memory is the primary constraint.

The Verdict

The data indicates these are not competing products. The AMD Radeon RX 7400 OEM occupies the entry-level desktop and OEM market, with a 50th percentile ranking among all GPUs. The NVIDIA B300 also ranks at the 50th percentile in the database, but that ranking reflects a different benchmark pool dominated by compute workloads. The RX 7400 OEM uses the Navi 33 chip on a 6 nm TSMC process. The B300 uses the GB110 chip on a 5 nm TSMC process.

For users needing a functional graphics card with display outputs, low power draw, and a single-slot form factor, the RX 7400 OEM is the appropriate selection. It has 1792 shading units, 112 texture mapping units, 64 render output units, and 28 ray tracing cores. Its PCIe 4.0 x8 interface is sufficient for its bandwidth needs. The 167 mm length allows installation in compact chassis.

For users operating a server or AI compute cluster, the B300 is the only option that fits the described requirements. It has 18,944 shading units, 592 texture mapping units, 24 render output units, and 592 tensor cores. The B300 supports PCIe 5.0 x16 and requires the massive power delivery of a data center environment. No display output means it is strictly a compute accelerator.

The verdict from the database is clear: the RX 7400 OEM wins where display output, low power, and physical size matter. The B300 wins where compute throughput, memory capacity, and AI acceleration matter. Neither part can substitute for the other in its intended role.

Head-to-Head Benchmarks

No direct head-to-head benchmark results exist in the database for these two GPUs. The winsA and winsB fields are both zero, and the headToHeadBenchmarks array is empty. The comparison must therefore be drawn from the specification data.

The largest single specification gap is FP16 compute. The B300 delivers 1,231.8 TFLOPS FP16, which is 156 times the RX 7400 OEM's 7.885 TFLOPS FP16. The B300 achieves this through a 16:1 FP16 to FP32 ratio, while the AMD part runs FP16 at a 1:1 ratio with its FP32 throughput. For AI training and inference workloads that rely on half-precision arithmetic, the B300's advantage is overwhelming.

Memory bandwidth shows the second-largest gap. The B300's 4.10 TB/s is approximately 23.7 times the RX 7400 OEM's 172.8 GB/s. This bandwidth disparity directly impacts large matrix operations, transformer model inference, and scientific simulations that stream data through the GPU. The RX 7400 OEM's GDDR6 memory on a 128-bit bus cannot approach the HBM3e stack on a 4096-bit bus.

Pixel rate favors the AMD part. The RX 7400 OEM achieves 70.40 GPixel/s, while the B300 achieves 48.77 GPixel/s. Despite having far fewer shading units, the RX 7400 OEM's 64 render output units outpace the B300's 24 render output units in pixel fill. This confirms the AMD part's rasterization focus versus the B300's compute focus.

Texture rate favors the B300. The NVIDIA part reaches 1,202.9 GTexel/s against the RX 7400 OEM's 123.2 GTexel/s. The B300 has 592 texture mapping units versus 112 on the AMD part. This gives the B300 a 9.8 times advantage in texture throughput, relevant for certain graphics and compute kernels.

Clock speeds show the B300 running at 1665 MHz base and 2032 MHz boost. The RX 7400 OEM runs at 330 MHz base and 1100 MHz boost. The B300's higher clocks combine with its larger shader count to produce the FP32 advantage of 76.99 TFLOPS versus 7.885 TFLOPS.

FAQ

Q: Which GPU has more memory?

A: The NVIDIA B300 has 144 GB of HBM3e memory, while the AMD Radeon RX 7400 OEM has 8 GB of GDDR6 memory.

Q: Can the NVIDIA B300 connect to a display?

A: No. The B300 has no display outputs, while the RX 7400 OEM provides 1x HDMI 2.1a and 3x DisplayPort 2.1.

Q: What is the power requirement difference?

A: The RX 7400 OEM has a 55 W TDP and suggests a 250 W power supply. The B300 has a 1400 W TDP and suggests an 1800 W power supply.

Q: Which GPU has tensor cores?

A: Only the NVIDIA B300 has tensor cores, with 592 of them. The RX 7400 OEM has no tensor cores listed, but it does include 28 ray tracing cores.

Q: What process nodes do the two GPUs use?

A: The RX 7400 OEM uses a 6 nm TSMC process. The B300 uses a 5 nm TSMC process.

Q: Which GPU has a higher FP32 performance?

A: The B300 achieves 76.99 TFLOPS FP32, compared to 7.885 TFLOPS for the RX 7400 OEM. The B300 also reaches 1,231.8 TFLOPS FP16, while the RX 7400 OEM delivers 7.885 TFLOPS FP16.

Architecture Differences

The AMD Radeon RX 7400 OEM uses the RDNA 3.0 architecture on the Navi 33 chip, with the codename Hotpink Bonefish. It belongs to the Navi III generation within the RX 7000 series. The chip contains 13,300 million transistors on a 204 mm² die, yielding a transistor density of 65.2 million per square millimeter. The architecture supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The NVIDIA B300 uses the Blackwell Ultra architecture on the GB110 chip. It belongs to the Server Blackwell generation. The chip contains 104,000 million transistors, though die size and transistor density are not recorded. The B300 has no API support listed in the database, reflecting its server compute focus rather than graphics API compatibility.

The RX 7400 OEM has 1792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores. The B300 has 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores, with no ray tracing core count recorded. The shading unit ratio is approximately 10.6 to 1 in favor of the B300. The TMU ratio is approximately 5.3 to 1. The ROP count favors the AMD part, 64 to 24.

Memory architecture differs fundamentally. The RX 7400 OEM uses 8 GB GDDR6 on a 128-bit bus with 172.8 GB/s bandwidth. The B300 uses 144 GB HBM3e on a 4096-bit bus with 4.10 TB/s bandwidth. The B300's memory clock is listed at 2000 MHz with 8 Gbps effective, while the RX 7400 OEM's memory runs at 1350 MHz with 10.8 Gbps effective.

Specification Differences

Process node: the RX 7400 OEM uses 6 nm, the B300 uses 5 nm. Both use TSMC as the foundry.

Transistor count: the RX 7400 OEM has 13,300 million transistors, the B300 has 104,000 million. The B300 contains roughly 7.8 times as many transistors.

Die size: the RX 7400 OEM measures 204 mm², the B300 has no die size recorded.

Clock speeds: the RX 7400 OEM runs at 330 MHz base and 1100 MHz boost. The B300 runs at 1665 MHz base and 2032 MHz boost.

FP32 performance: the RX 7400 OEM delivers 7.885 TFLOPS, the B300 delivers 76.99 TFLOPS.

FP16 performance: the RX 7400 OEM delivers 7.885 TFLOPS at a 1:1 ratio. The B300 delivers 1,231.8 TFLOPS at a 16:1 ratio.

Pixel rate: the RX 7400 OEM achieves 70.40 GPixel/s, the B300 achieves 48.77 GPixel/s.

Texture rate: the RX 7400 OEM achieves 123.2 GTexel/s, the B300 achieves 1,202.9 GTexel/s.

Power: the RX 7400 OEM has a 55 W TDP and a 250 W suggested PSU. The B300 has a 1400 W TDP and an 1800 W suggested PSU.

Form factor: the RX 7400 OEM is single-slot with a 167 mm length and uses a 1x 6-pin power connector. The B300 is an SXM Module with no power connector or dimensions listed.

Bus interface: the RX 7400 OEM uses PCIe 4.0 x8, the B300 uses PCIe 5.0 x16.

Display outputs: the RX 7400 OEM has 1x HDMI 2.1a and 3x DisplayPort 2.1. The B300 has no outputs.

Release dates: the RX 7400 OEM was released on 2025-08-07, the B300 on 2025-09-10.

Predecessors and successors: the RX 7400 OEM follows Navi II and precedes Navi IV. The B300 follows Server Hopper and precedes Server Rubin. The B300's production status is Active, while the RX 7400 OEM's production status is not recorded.