AMD Radeon 840M vs NVIDIA B300 Comparison

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark results between the AMD Radeon 840M and the NVIDIA B300. Both entries have empty benchmark arrays, zero average benchmark scores, and no nearest rival listings. The database shows no measured performance comparisons, no synthetic test results, and no frame rate data for either product in this pairing.

What the data does provide are raw specification-derived throughput figures. The AMD Radeon 840M delivers 1,484.8 GFLOPS of FP32 compute, while the NVIDIA B300 reaches 76.99 TFLOPS. Converting the B300 figure to GFLOPS for direct comparison yields 76,990 GFLOPS, which places it approximately 51.9 times higher than the Radeon 840M in single-precision floating point throughput. This is a computed ratio from the exact figures in the database, not a measured benchmark result.

Texture processing shows a similar gap. The Radeon 840M produces 46.40 GTexel/s, while the B300 reaches 1,202.9 GTexel/s, a factor of roughly 25.9. Pixel throughput favors the B300 less dramatically: 48.77 GPixel/s versus 23.20 GPixel/s, meaning the NVIDIA part is about 2.1 times faster in fill rate.

Both products sit at the 50th percentile versus all GPUs in the database. This percentile value is identical for both entries, indicating that the database currently places them at the median of its recorded GPU population, though the lack of benchmark scores makes this percentile difficult to interpret as a performance ranking.

The absence of head-to-head benchmark data means the database cannot confirm how these two products behave in real workloads. The specification comparison indicates the B300 holds a decisive theoretical advantage in raw compute, texture, and pixel throughput, but no measured results exist to validate how the Radeon 840M's integrated design interacts with system memory, how the B300 scales across multi-GPU server configurations, or how thermal and power constraints affect sustained performance in either product.

Where Each One Wins

Based strictly on the recorded data, the NVIDIA B300 wins in every quantitative specification category where a direct comparison is possible.

Compute throughput: the B300 delivers 76.99 TFLOPS FP32 against the Radeon 840M's 1,484.8 GFLOPS. The B300 also provides 1,231.8 TFLOPS FP16 (with a 16:1 ratio), while the Radeon 840M provides 1,484.8 GFLOPS FP16 (with a 1:1 ratio). The 16:1 ratio on the B300 indicates its FP16 throughput is heavily accelerated relative to FP32, a characteristic of tensor-optimized server silicon.

Memory capacity and bandwidth: the B300 carries 144 GB of HBM3e across a 4096-bit bus, delivering 4.10 TB/s of bandwidth. The Radeon 840M uses system shared memory with a system dependent bandwidth figure. The database records the B300's memory clock at 2000 MHz with 8 Gbps effective speed. The Radeon 840M has no dedicated memory clock, instead using system shared memory at system dependent speeds.

Transistor count: the B300 integrates 104,000 million transistors on TSMC's 5 nm process. The Radeon 840M's transistor count is recorded as unknown, so no comparison is possible.

The AMD Radeon 840M wins in the categories that matter for its form factor. It is an IGP (integrated graphics processor) with a 15 W TDP, requires no power connectors, uses a PCIe 4.0 x8 interface, and its display outputs are portable device dependent. The B300 is an SXM module with a 1400 W TDP, a suggested PSU of 1800 W, no display outputs, and a PCIe 5.0 x16 interface.

The Radeon 840M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B300 has no recorded API support in the database, with null values for DirectX, OpenGL, and Vulkan. This makes the Radeon 840M the only one of the two with confirmed graphics API compatibility in the recorded data.

The Radeon 840M also wins on release timing for client devices: it was released on 2025-02-28, while the B300 followed on 2025-09-10. The Radeon 840M's predecessor is recorded as Navi II IGP, while the B300's predecessor is Server Hopper and its successor is Server Rubin.

Architecture Differences

The two products come from different architecture families, different process nodes, and different design philosophies.

The AMD Radeon 840M uses the RDNA 3.5 architecture on TSMC's 4 nm process, with the chip named Krackan Point. Its generation is recorded as Navi III IGP (Strix Point Mobile). The NVIDIA B300 uses the Blackwell Ultra architecture on TSMC's 5 nm process, with the chip named GB110 and the generation listed as Server Blackwell (Bxx).

The Radeon 840M has 256 shading units, 16 texture mapping units, 8 raster output pipelines, and 4 ray tracing cores. It has no recorded tensor cores. The B300 has 18,944 shading units, 592 TMUs, 24 ROPs, and 592 tensor cores. Its ray tracing core count is not recorded in the database.

The Radeon 840M's clock behavior is characterized by a 400 MHz base and a 2900 MHz boost. The B300 runs a 1665 MHz base and a 2032 MHz boost. The Radeon 840M's boost clock is higher in raw MHz, but the B300's much larger shader array produces dramatically higher aggregate throughput.

Memory architecture differs fundamentally. The Radeon 840M uses system shared memory with a system dependent bandwidth figure, which means its memory performance depends entirely on the host platform's memory subsystem. The B300 uses 144 GB of HBM3e on a 4096-bit bus with 4.10 TB/s bandwidth. The Radeon 840M's memory type, size, and bus width are all recorded as system shared, while the B300 has fixed, dedicated memory resources.

The Radeon 840M is built for integration: it is an IGP with a 15 W TDP, no power connectors, and a PCIe 4.0 x8 interface. The B300 is a server accelerator module: SXM form factor, 1400 W TDP, 1800 W suggested PSU, and a PCIe 5.0 x16 interface.

The Radeon 840M supports a full graphics API stack: DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B300 records null values for all three APIs, indicating the database does not attribute client graphics API support to this server part.

The Radeon 840M lists display outputs as portable device dependent, meaning it relies on the host device's display connections. The B300 has no display outputs at all, consistent with its server accelerator role.

Transistor information is incomplete for the Radeon 840M (unknown), while the B300 records 104,000 million transistors. Die size is unknown for both products.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The NVIDIA B300 delivers 76.99 TFLOPS of FP32 compute, while the AMD Radeon 840M delivers 1,484.8 GFLOPS. The B300's FP32 throughput is approximately 51.9 times higher based on the recorded figures.

Q: What memory configurations do these two GPUs use?

A: The AMD Radeon 840M uses system shared memory with system dependent bandwidth, meaning it draws from the host system's memory. The NVIDIA B300 uses 144 GB of HBM3e with a 4096-bit bus and 4.10 TB/s of bandwidth.

Q: Do both GPUs support ray tracing?

A: The AMD Radeon 840M has 4 ray tracing cores. The NVIDIA B300's ray tracing core count is not recorded in the database, so a direct comparison cannot be made.

Q: What are the power requirements of each GPU?

A: The AMD Radeon 840M has a 15 W TDP and requires no power connectors. The NVIDIA B300 has a 1400 W TDP and a suggested PSU of 1800 W.

Q: Which GPU supports DirectX?

A: The AMD Radeon 840M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA B300 has null values recorded for DirectX, OpenGL, and Vulkan in the database.

Q: When was each GPU released?

A: The AMD Radeon 840M was released on 2025-02-28. The NVIDIA B300 was released on 2025-09-10.

The Verdict

The database presents two products with fundamentally different roles. The AMD Radeon 840M is an integrated graphics processor for mobile devices: 15 W TDP, system shared memory, PCIe 4.0 x8, full client graphics API support, and display output capability dependent on the portable host device. The NVIDIA B300 is a server accelerator module: 1400 W TDP, 144 GB HBM3e, PCIe 5.0 x16, no display outputs, and no recorded client graphics API support.

The specification data shows the B300 holds a commanding lead in raw compute throughput, memory bandwidth, and texture processing. Its 76.99 TFLOPS FP32, 4.10 TB/s memory bandwidth, and 1,202.9 GTexel/s texture rate dwarf the Radeon 840M's corresponding figures of 1,484.8 GFLOPS, system dependent bandwidth, and 46.40 GTexel/s. The B300 also integrates 104,000 million transistors and 592 tensor cores, features the Radeon 840M does not match in the recorded data.

The Radeon 840M counters with attributes the B300 does not possess. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. It has a 1:1 FP16 to FP32 ratio, suggesting balanced compute for graphics workloads. It operates within a 15 W envelope, uses no external power connectors, and fits the IGP form factor. Its release date of 2025-02-28 precedes the B300's 2025-09-10 launch.

No benchmark scores exist for either product in the database, so the verdict rests entirely on specifications. For a portable device requiring graphics API support, integrated operation, and minimal power draw, the Radeon 840M is the only applicable choice in this pairing. For server-side compute requiring massive FP32 and FP16 throughput, vast memory capacity, and tensor core acceleration, the B300 is the only applicable choice. The data does not support using either product in the other's intended environment.