AMD Radeon 840M vs NVIDIA RTX PRO 4500 Blackwell Server Comparison

Where Each One Wins

The AMD Radeon 840M and NVIDIA RTX PRO 4500 Blackwell Server occupy entirely different segments of the GPU market, and the recorded data reflects that separation clearly. The Radeon 840M is an integrated graphics processor built into the Krackan Point mobile chip, designed for portable devices where power consumption and space are the primary constraints. The RTX PRO 4500 is a dedicated server-class accelerator built for professional compute workloads, with a single-slot form factor and no display outputs whatsoever.

The Radeon 840M wins in the mobile integration category by default, as it carries an IGP slot width, uses no power connectors, and draws only 15 W. The RTX PRO 4500 cannot compete in this space because it requires a PCIe 5.0 x16 slot, a 16-pin power connector, and a suggested power supply of 450 W. The 840M also relies on system shared memory, which means it has no dedicated VRAM allocation and its bandwidth is system dependent. For thin-and-light laptops, the 840M is the only viable option between these two.

The RTX PRO 4500 wins in every raw performance category where the two overlap. It delivers 50.70 TFLOPS of FP32 compute versus 1,484.8 GFLOPS for the 840M, a gap of roughly 34 times. The NVIDIA part also has 32 GB of dedicated GDDR7 memory on a 256-bit bus with 800.3 GB/s of bandwidth, while the AMD part has no dedicated memory at all. The server GPU produces 270.5 GPixel/s of pixel throughput and 792.1 GTexel/s of texture throughput, compared to 23.20 GPixel/s and 46.40 GTexel/s for the integrated part. The RTX PRO 4500 is the clear winner in any scenario requiring sustained compute, rendering, or large dataset handling.

Architecture Differences

The two GPUs come from different architectural lineages. The Radeon 840M uses RDNA 3.5, built on a 4 nm process at TSMC, and belongs to the Navi III IGP generation for Strix Point mobile processors. The RTX PRO 4500 uses Blackwell 2.0, built on a 5 nm process also at TSMC, and belongs to the Server Blackwell generation. Both use the same foundry, but the process nodes differ by one nanometer step.

The transistor counts tell a dramatic story. The RTX PRO 4500 packs 45,600 million transistors on a 378 mm² die, giving a transistor density of 120.6 million per square millimeter. The Radeon 840M's transistor count and die size are listed as unknown in the database, so no direct comparison is possible. The NVIDIA die is physically large and densely packed, which explains its much higher resource counts.

The shading resources differ substantially. The RTX PRO 4500 has 10,496 shading units, 328 texture mapping units, and 112 raster operation units. The Radeon 840M has 256 shading units, 16 TMUs, and 8 ROPs. These numbers confirm that the server GPU has roughly 41 times more shading units and 20.5 times more TMUs. The RTX PRO 4500 also carries 82 ray tracing cores and 328 tensor cores, while the 840M has just 4 ray tracing cores and no tensor cores listed. The tensor core presence gives the NVIDIA part a significant advantage for AI and machine learning workloads, a capability the AMD integrated GPU simply does not offer.

Clock behavior also differs. The Radeon 840M has a base clock of 400 MHz and a boost clock of 2900 MHz, which is a wide dynamic range typical of integrated parts that scale down aggressively to save power. The RTX PRO 4500 has a base clock of 1215 MHz and a boost clock of 2415 MHz, a narrower range that reflects a sustained server workload profile.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two products, and neither part has a recorded average benchmark score. Both GPUs sit at the 50th percentile against all GPUs in the database, which is a neutral position but does not carry comparative meaning across such different product categories. The wins counters show zero for each side, which is consistent with the absence of direct benchmark data.

Despite the lack of measured scores, the specification data allows for direct arithmetic comparisons. The FP32 throughput difference is the most striking: the RTX PRO 4500 delivers 50.70 TFLOPS versus 1,484.8 GFLOPS for the 840M. Converting the AMD figure to TFLOPS gives approximately 1.48 TFLOPS, meaning the NVIDIA part is roughly 34 times faster in single-precision compute. The FP16 figures are identical to the FP32 figures for both parts, with both listed as 1:1 ratios. This means neither GPU has a half-precision boost, so the performance ratio holds across both precision formats.

Memory bandwidth is another area of complete separation. The RTX PRO 4500 has 800.3 GB/s of dedicated bandwidth, while the Radeon 840M has system dependent bandwidth with no fixed figure. In practical terms, the NVIDIA part can feed its 10,496 shading units from 32 GB of GDDR7, while the AMD part must share system memory with the CPU and other components. The pixel rate difference of 270.5 GPixel/s versus 23.20 GPixel/s indicates an 11.7 times advantage for the server GPU in fill-rate bound scenarios. The texture rate difference of 792.1 GTexel/s versus 46.40 GTexel/s represents a 17.1 times advantage.

Specification Differences

The two products differ in nearly every measurable specification. The process nodes are 4 nm for AMD and 5 nm for NVIDIA. The transistor count is unknown for the 840M and 45,600 million for the RTX PRO 4500. The die size is unknown for the 840M and 378 mm² for the NVIDIA part. The transistor density is not listed for the AMD GPU and is 120.6 million per square millimeter for the NVIDIA GPU.

Clock speeds diverge significantly. The 840M runs at 400 MHz base and 2900 MHz boost. The RTX PRO 4500 runs at 1215 MHz base and 2415 MHz boost. The memory clock for the 840M is listed as system shared, while the NVIDIA part operates at 1563 MHz with 25 Gbps effective speed. The memory configurations are fundamentally different: system shared capacity and type for AMD versus 32 GB of GDDR7 for NVIDIA, with a 256-bit bus width versus system shared, and 800.3 GB/s bandwidth versus system dependent.

Compute resources differ by orders of magnitude. The 840M has 256 shading units, 16 TMUs, 8 ROPs, and 4 ray tracing cores. The RTX PRO 4500 has 10,496 shading units, 328 TMUs, 112 ROPs, and 82 ray tracing cores. The NVIDIA part adds 328 tensor cores, which the AMD part lacks entirely. The pixel rate is 23.20 GPixel/s for AMD and 270.5 GPixel/s for NVIDIA. The texture rate is 46.40 GTexel/s for AMD and 792.1 GTexel/s for NVIDIA. The FP32 and FP16 throughput figures are 1,484.8 GFLOPS for AMD and 50.70 TFLOPS for NVIDIA.

Power and physical specifications also separate the two. The 840M draws 15 W, is an IGP slot width, uses no power connectors, and has no suggested power supply. The RTX PRO 4500 draws 165 W, is single-slot, uses one 16-pin connector, and has a suggested power supply of 450 W. The bus interface is PCIe 4.0 x8 for AMD and PCIe 5.0 x16 for NVIDIA. Display outputs are portable device dependent for the 840M and absent for the RTX PRO 4500, which has no outputs at all. The NVIDIA card measures 267 mm by 111 mm by 40 mm, while the AMD IGP has no listed dimensions.

Release dates differ by roughly one year. The Radeon 840M was released on February 28, 2025. The RTX PRO 4500 was released on March 16, 2026. The AMD part's predecessor is the Navi II IGP, while the NVIDIA part's predecessor is the Server Hopper and its successor is the Server Rubin. Both are listed as active production parts. Neither has a launch MSRP in the database.

FAQ

Q: Which GPU has more shading units?

A: The NVIDIA RTX PRO 4500 Blackwell Server has 10,496 shading units, while the AMD Radeon 840M has 256 shading units.

Q: What is the memory configuration of each GPU?

A: The Radeon 840M uses system shared memory with system dependent bandwidth. The RTX PRO 4500 has 32 GB of GDDR7 memory on a 256-bit bus with 800.3 GB/s of bandwidth.

Q: Do both GPUs support the same APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the power draw difference?

A: The Radeon 840M has a 15 W TDP and uses no power connectors. The RTX PRO 4500 has a 165 W TDP and requires one 16-pin power connector with a suggested power supply of 450 W.

Q: Which GPU has tensor cores?

A: Only the NVIDIA RTX PRO 4500 has tensor cores, with 328 of them. The AMD Radeon 840M has no tensor cores listed.

Q: What are the release dates for these products?

A: The AMD Radeon 840M was released on February 28, 2025. The NVIDIA RTX PRO 4500 Blackwell Server was released on March 16, 2026.

The Verdict

The data supports a clear separation of use cases. The AMD Radeon 840M is an integrated graphics solution for mobile devices, drawing only 15 W, using system shared memory, and fitting into an IGP slot width with no power connectors. It is the appropriate choice for portable systems where the GPU must coexist with the CPU in a low-power envelope and where dedicated graphics hardware is not feasible.

The NVIDIA RTX PRO 4500 Blackwell Server is a dedicated server accelerator with 32 GB of GDDR7 memory, 800.3 GB/s of bandwidth, 10,496 shading units, 82 ray tracing cores, and 328 tensor cores. It delivers 50.70 TFLOPS of FP32 compute, which is approximately 34 times the 1,484.8 GFLOPS of the Radeon 840M. It requires a PCIe 5.0 x16 slot, a 16-pin power connector, and a suggested power supply of 450 W. It has no display outputs, confirming its role as a compute device rather than a graphics output device.

The choice between these two GPUs is not a competitive decision but a platform decision. The Radeon 840M serves the integrated mobile market with a 4 nm process, a boost clock of 2900 MHz, and a 15 W envelope. The RTX PRO 4500 serves the server market with a 5 nm process, a 165 W envelope, and a single-slot physical design. The recorded specifications show no overlap in target platforms, power requirements, memory systems, or compute capabilities. Each product wins in its own domain, and the data does not indicate any scenario where a buyer would reasonably choose between them.