AMD Radeon 740M vs NVIDIA B300 SXM6 AC Comparison

FAQ

Q: How does the AMD Radeon 740M compare to the NVIDIA B300 SXM6 AC in Geekbench OpenCL?

A: The AMD Radeon 740M scores 10,172 points, while the NVIDIA B300 SXM6 AC scores 369,831 points. This gives the NVIDIA part a 97.2% advantage, making it roughly 36 times faster in this workload.

Q: What is the transistor count difference between these two GPUs?

A: The AMD Radeon 740M uses 20,900 million transistors on a 137 mm² die, while the NVIDIA B300 SXM6 AC uses 208,000 million transistors on a 1,628 mm² die. The NVIDIA chip packs approximately 10 times more transistors.

Q: Which GPU has the higher memory bandwidth?

A: The NVIDIA B300 SXM6 AC offers 8.19 TB/s of bandwidth across an 8192-bit bus using 288 GB of HBM3e memory. The AMD Radeon 740M uses system shared memory with bandwidth that is dependent on the host system.

Q: How do their FP32 compute capabilities compare?

A: The AMD Radeon 740M delivers 2.867 TFLOPS of FP32 performance, whereas the NVIDIA B300 SXM6 AC delivers 76.99 TFLOPS. The NVIDIA accelerator is about 27 times more powerful in raw single-precision throughput.

Q: What are the thermal design power ratings?

A: The AMD Radeon 740M is rated at 45 W and functions as an integrated GPU, while the NVIDIA B300 SXM6 AC is rated at 1100 W and requires a 1500 W suggested PSU. The NVIDIA module has no display outputs.

Q: What process nodes do these chips use, and who manufactures them?

A: Both are built by TSMC. The AMD Radeon 740M uses a 4 nm process, and the NVIDIA B300 SXM6 AC uses a 5 nm process. Interestingly, the larger 5 nm chip achieves a lower transistor density at 127.8M / mm² versus 152.6M / mm² for the AMD part.

The Verdict

The database places the AMD Radeon 740M at the 53rd percentile among all GPUs, with an average benchmark score of 12,870. Its nearest rivals cluster tightly around this figure: the AMD FirePro W5100 sits 0.2% behind, the AMD Radeon Pro 455 is 0.3% behind, the NVIDIA GeForce GTX 590 is 0.3% behind, and the AMD Radeon RX 580 leads by 0.4%. This positioning describes a mid-range integrated part that trades blows with older discrete desktop cards.

The NVIDIA B300 SXM6 AC occupies the 100th percentile, meaning no recorded GPU scores higher in the database. Its average benchmark score of 369,831 is 7% above the NVIDIA B200, 10.4% above the NVIDIA H200 NVL, 16.3% above the AMD Instinct MI300X, and 25% above the NVIDIA L40S. These deltas show a clear hierarchy among server accelerators, with the B300 at the top.

The data supports a straightforward split. Systems requiring an integrated GPU with modest compute, a 45 W power envelope, and no external power connectors should use the AMD Radeon 740M. Server deployments demanding maximum compute throughput, 288 GB of HBM3e memory, and 8.19 TB/s of bandwidth should select the NVIDIA B300 SXM6 AC. The 97.2% OpenCL gap makes the choice obvious for compute-bound workloads, while the 740M remains the only option for applications that need an IGP without a separate power supply.

Head-to-Head Benchmarks

The single recorded head-to-head test is Geekbench OpenCL. The AMD Radeon 740M produces 10,172 points, and the NVIDIA B300 SXM6 AC produces 369,831 points. The delta is -97.2% from the perspective of the AMD part, meaning the NVIDIA accelerator holds a massive advantage in this synthetic compute workload.

The magnitude of this gap deserves context. The AMD Radeon 740M's nearest rivals in the overall database, such as the AMD FirePro W5100 and NVIDIA GeForce GTX 590, sit within 0.3% of its average score. The NVIDIA B300 SXM6 AC's nearest rivals, including the NVIDIA B200 at 7% behind and the AMD Instinct MI300X at 16.3% behind, are separated by single-digit or low-double-digit percentage points. The 97.2% delta between the two compared parts dwarfs these internal rival gaps.

The OpenCL result aligns with the raw specification differences. The NVIDIA B300 SXM6 AC delivers 76.99 TFLOPS of FP32 compute versus 2.867 TFLOPS for the AMD part, a factor of approximately 27. The NVIDIA texture rate reaches 1,202.9 GTexel/s against 44.80 GTexel/s for the AMD chip, and the pixel rates are 48.77 GPixel/s versus 22.40 GPixel/s. Memory bandwidth presents the widest divergence: 8.19 TB/s against a system-dependent figure for the AMD IGP.

The AMD Radeon 740M wins no head-to-head tests in the recorded data. The NVIDIA B300 SXM6 AC wins the only comparison. That said, the AMD part does hold advantages in areas outside raw performance: it operates at 45 W versus 1100 W, requires no power connectors, uses a 4 nm process, and supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The NVIDIA module lists N/A for all three graphics APIs and has no display outputs.

Specification Differences

The two parts differ across nearly every measurable specification. The AMD Radeon 740M uses the Phoenix2 chip with the RDNA 3.0 architecture, while the NVIDIA B300 SXM6 AC uses the GB110 chip with the Blackwell Ultra architecture. Both come from TSMC, but the AMD part uses a 4 nm process and the NVIDIA part uses 5 nm.

Transistor counts diverge sharply: 20,900 million for AMD versus 208,000 million for NVIDIA. Die sizes follow the same pattern, with the AMD chip at 137 mm² and the NVIDIA chip at 1,628 mm². Transistor density actually favors the smaller AMD chip at 152.6M / mm² versus 127.8M / mm² for the NVIDIA part.

Clock behavior differs. The AMD Radeon 740M has an 800 MHz base clock and a 2800 MHz boost clock. The NVIDIA B300 SXM6 AC has a 1665 MHz base clock and a 2032 MHz boost clock. The NVIDIA part runs at a lower boost clock but compensates with far more execution resources.

The memory subsystem is the most dramatic divergence. The AMD Radeon 740M uses system shared memory with a system-dependent bandwidth. The NVIDIA B300 SXM6 AC carries 288 GB of HBM3e across an 8192-bit bus, delivering 8.19 TB/s. The bus width alone is 128 times larger than the AMD part's shared-memory configuration.

Compute unit counts differ by orders of magnitude. The AMD part has 256 shading units, 16 TMUs, and 8 ROPs. The NVIDIA part has 18,944 shading units, 592 TMUs, and 24 ROPs. The NVIDIA accelerator also includes 592 tensor cores, while the AMD part lists none. The AMD chip includes 4 ray tracing cores, while the NVIDIA part lists no dedicated RT core count.

Power requirements are equally lopsided. The AMD Radeon 740M draws 45 W, uses an IGP slot width, and needs no power connectors. The NVIDIA B300 SXM6 AC draws 1100 W, uses an SXM Module slot width, and requires a 1500 W suggested PSU. The AMD part connects via PCIe 4.0 x8, while the NVIDIA part uses PCIe 6.0 x16.

Display output capability also separates the two. The AMD Radeon 740M offers motherboard-dependent display outputs and supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The NVIDIA B300 SXM6 AC provides no display outputs and lists N/A for DirectX, OpenGL, and Vulkan support.

Architecture Differences

The AMD Radeon 740M belongs to the Navi III IGP (Phoenix) generation and succeeds the Navi II IGP. It uses the RDNA 3.0 architecture, which targets integrated graphics in mobile and low-power platforms. The chip incorporates 4 ray tracing cores, a feature that gives it hardware support for ray-traced workloads despite its modest compute resources. The 4 nm TSMC process yields a transistor density of 152.6M / mm², which is higher than the NVIDIA part's density despite the AMD chip having far fewer total transistors.

The NVIDIA B300 SXM6 AC belongs to the Server Blackwell (Bxx) generation and succeeds the Server Hopper architecture. It uses the Blackwell Ultra architecture, an evolution aimed at datacenter and AI workloads. The chip contains 592 tensor cores, which handle matrix operations for machine learning and neural network inference. The NVIDIA part lists no ray tracing core count in the database. The 5 nm TSMC process produces a transistor density of 127.8M / mm², lower than the AMD part's density, but the absolute transistor count of 208,000 million is roughly ten times higher.

The FP16 to FP32 ratio is identical for both parts at 1:1. The AMD Radeon 740M delivers 2.867 TFLOPS in both FP16 and FP32, and the NVIDIA B300 SXM6 AC delivers 76.99 TFLOPS in both formats. This indicates neither chip uses dedicated half-rate FP16 paths; both execute half-precision at the same throughput as single-precision.

The memory architectures reflect their different purposes. The AMD Radeon 740M relies on system shared memory, meaning its bandwidth and capacity depend entirely on the host platform's memory configuration. The NVIDIA B300 SXM6 AC integrates 288 GB of HBM3e on a 8192-bit interface, providing deterministic 8.19 TB/s bandwidth that does not depend on host memory.

The release timeline shows these are products from different eras. The AMD Radeon 740M launched on January 30, 2024. The NVIDIA B300 SXM6 AC launched on September 10, 2025. Both are currently marked as Active in production status.

The AMD part's predecessor and successor are both listed as Navi II IGP and Navi III IGP respectively, indicating a continuous integrated GPU lineage. The NVIDIA part's predecessor is Server Hopper and its successor is Server Rubin, showing a separate product line aimed exclusively at server deployments. The API support difference reinforces this split: the AMD IGP supports consumer graphics APIs, while the NVIDIA server module lists no graphics API support because it is built for compute-oriented tasks rather than rendering to displays.