AMD Radeon 840M vs NVIDIA RTX PRO 4000 Blackwell Comparison

AMD Radeon 840M and NVIDIA RTX PRO 4000 Blackwell sit at opposite ends of the GPU spectrum. The 840M is a 15 W integrated part built into AMD’s Krackan Point mobile chips, while the RTX PRO 4000 Blackwell is a 140 W single-slot workstation card with 24 GB of GDDR7 memory. The database shows no head-to-head benchmark entries between the two, and the 840M has no recorded standalone benchmark scores. The RTX PRO 4000 Blackwell, by contrast, has a full set of measurements, an average benchmark score of 27135, and a percentile rank of 72 among all GPUs. The 840M holds a percentile rank of 50, but its average benchmark score is 0, meaning it has no validated performance data in the database. All comparisons below rely on the recorded data for the RTX PRO 4000 Blackwell and the architectural specifications for both parts.

Where Each One Wins

The AMD Radeon 840M wins in power efficiency and integration. It operates at a 15 W TDP, uses system shared memory, and requires no power connectors. It is an IGP, meaning it occupies no expansion slot and relies entirely on the host laptop’s memory subsystem. This makes it the only realistic choice for portable, low-power devices where a discrete GPU cannot fit. Its boost clock of 2900 MHz is higher than the RTX PRO 4000 Blackwell’s 2055 MHz, and its base clock of 400 MHz is far lower, indicating a wide dynamic range suited to idle and burst workloads.

The NVIDIA RTX PRO 4000 Blackwell wins in every measurable performance category. Its average benchmark score of 27135 places it in the 72nd percentile of all GPUs, while the 840M’s 0 score leaves it unranked by actual results. The RTX PRO 4000 Blackwell is 1.7% ahead of the NVIDIA RTX A4000 (average score 26683) and 1.1% behind the AMD Radeon RX 6700 XT (average score 27425) and NVIDIA GeForce RTX 4070 Mobile (average score 27435). It also trails the NVIDIA GeForce RTX 3090 (average score 27565) by 1.6%. These deltas show the RTX PRO 4000 Blackwell performing in the same band as high-end consumer and mobile GPUs, not integrated graphics. The 840M has no rival data to compare, so its wins are limited to power draw, physical footprint, and system integration.

Architecture Differences

The two GPUs use different foundries and process nodes. The AMD Radeon 840M is built on TSMC’s 4 nm process and uses the RDNA 3.5 architecture. It belongs to the Navi III IGP generation for Strix Point Mobile and is based on the Krackan Point chip. The NVIDIA RTX PRO 4000 Blackwell uses TSMC’s 5 nm process, the Blackwell 2.0 architecture, and the GB203 chip. It is part of the Blackwell PRO W (x000) generation. The 840M’s predecessor is Navi II IGP, while the RTX PRO 4000 Blackwell’s predecessor is Workstation Ada.

Transistor counts differ dramatically. The GB203 chip in the RTX PRO 4000 Blackwell packs 45,600 million transistors on a 378 mm² die, giving a transistor density of 120.6M per mm². The 840M’s transistor count and die size are listed as unknown. The memory architecture is fundamentally different. The 840M uses system shared memory with a system dependent bandwidth and no dedicated VRAM. The RTX PRO 4000 Blackwell has 24 GB of GDDR7 on a 192-bit bus, delivering 672.0 GB/s of bandwidth and a memory clock of 1750 MHz (28 Gbps effective).

Compute resources also diverge sharply. The 840M has 256 shading units, 16 texture mapping units, 8 ROPs, and 4 ray tracing cores. It has no tensor cores. The RTX PRO 4000 Blackwell has 8960 shading units, 280 TMUs, 96 ROPs, 70 ray tracing cores, and 280 tensor cores. The interface differs as well: the 840M uses PCIe 4.0 x8, while the RTX PRO 4000 Blackwell uses PCIe 5.0 x16. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API-level feature parity exists despite the hardware gulf.

Head-to-Head Benchmarks

No head-to-head benchmark entries exist in the database for the AMD Radeon 840M versus the NVIDIA RTX PRO 4000 Blackwell. The 840M has zero wins and zero recorded benchmark scores, so a direct score comparison is impossible. The RTX PRO 4000 Blackwell, however, has nine standalone benchmark results that define its performance profile.

In 3DMark Steel Nomad (DX12), the RTX PRO 4000 Blackwell scores 4648. In Geekbench Vulkan, it scores 194168. The PassMark suite shows a wide spread across API generations: DirectX 9 at 354, DirectX 10 at 173, DirectX 11 at 276, and DirectX 12 at 97. The PassMark G2D score is 1265, the G3D score is 28427, and the GPU compute score is 14805. The average benchmark score of 27135 sits between the PassMark G3D result and the overall average, reflecting the weighting of the database’s benchmark set.

The nearest rivals provide context for these numbers. The RTX PRO 4000 Blackwell’s average score of 27135 is 1.1% below the AMD Radeon RX 6700 XT (27425) and 1.1% below the NVIDIA GeForce RTX 4070 Mobile (27435). It is 1.6% below the NVIDIA GeForce RTX 3090 (27565) and 1.7% above the NVIDIA RTX A4000 (26683). These are small deltas, placing the RTX PRO 4000 Blackwell in a tight competitive cluster with those four GPUs. The 840M cannot be placed in this cluster because it has no average benchmark score data.

FAQ

Q: Does the AMD Radeon 840M have any recorded benchmark scores?

A: No. The database shows an average benchmark score of 0 for the 840M and an empty benchmark list. Its percentile rank of 50 is based on its specification profile, not measured results.

Q: What is the average benchmark score of the NVIDIA RTX PRO 4000 Blackwell?

A: The average benchmark score is 27135, with a percentile rank of 72 among all GPUs. Its nearest rivals are within a 2.8 percentage point band, from the NVIDIA RTX A4000 at 26683 (1.7% slower) to the NVIDIA GeForce RTX 3090 at 27565 (1.6% faster).

Q: Which GPU has more ray tracing cores?

A: The NVIDIA RTX PRO 4000 Blackwell has 70 ray tracing cores. The AMD Radeon 840M has 4 ray tracing cores.

Q: How do the memory systems differ?

A: The 840M uses system shared memory with system dependent bandwidth. The RTX PRO 4000 Blackwell has 24 GB of GDDR7 memory on a 192-bit bus with 672.0 GB/s bandwidth and a 1750 MHz (28 Gbps effective) memory clock.

Q: What are the power requirements for each GPU?

A: The 840M has a 15 W TDP and no power connectors. The RTX PRO 4000 Blackwell has a 140 W TDP, uses a single 16-pin power connector, and has a suggested power supply of 300 W.

Q: Do both GPUs support the same graphics APIs?

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

Specification Differences

The AMD Radeon 840M and NVIDIA RTX PRO 4000 Blackwell differ in nearly every measurable specification.

Process and chip: the 840M uses TSMC 4 nm with the Krackan Point chip and RDNA 3.5 architecture. The RTX PRO 4000 Blackwell uses TSMC 5 nm with the GB203 chip and Blackwell 2.0 architecture. The 840M’s transistor count and die size are unknown; the RTX PRO 4000 Blackwell has 45,600 million transistors on a 378 mm² die with a density of 120.6M per mm².

Clocks: the 840M runs at 400 MHz base and 2900 MHz boost. The RTX PRO 4000 Blackwell runs at 1230 MHz base and 2055 MHz boost with a 1750 MHz (28 Gbps effective) memory clock.

Memory: the 840M uses system shared memory with no dedicated size, type, bus width, or bandwidth. The RTX PRO 4000 Blackwell has 24 GB GDDR7, a 192-bit bus, and 672.0 GB/s bandwidth.

Compute units: the 840M has 256 shading units, 16 TMUs, 8 ROPs, and 4 ray tracing cores. The RTX PRO 4000 Blackwell has 8960 shading units, 280 TMUs, 96 ROPs, and 70 ray tracing cores.

Tensor cores: the 840M has none. The RTX PRO 4000 Blackwell has 280 tensor cores.

Rates: the 840M delivers 23.20 GPixel/s pixel rate, 46.40 GTexel/s texture rate, 1,484.8 GFLOPS FP32, and 1,484.8 GFLOPS FP16 (1:1). The RTX PRO 4000 Blackwell delivers 197.3 GPixel/s pixel rate, 575.4 GTexel/s texture rate, 36.83 TFLOPS FP32, and 36.83 TFLOPS FP16 (1:1).

Power and physical: the 840M has a 15 W TDP, is an IGP, and uses no power connectors. The RTX PRO 4000 Blackwell has a 140 W TDP, is single-slot, uses one 16-pin connector, and has a suggested PSU of 300 W. The RTX PRO 4000 Blackwell measures 241 mm by 111 mm by 20 mm.

Interface and outputs: the 840M uses PCIe 4.0 x8 and has portable device dependent display outputs. The RTX PRO 4000 Blackwell uses PCIe 5.0 x16 and has 4x DisplayPort 2.1b outputs.

The Verdict

The data separates these two GPUs cleanly. The AMD Radeon 840M is a 15 W integrated part for Krackan Point laptops, with a high 2900 MHz boost clock, system shared memory, and no standalone benchmark results. It is appropriate for systems where power draw near 15 W and the absence of a discrete card matter more than raw throughput. The NVIDIA RTX PRO 4000 Blackwell is a 140 W single-slot workstation card with 24 GB of GDDR7, 672.0 GB/s bandwidth, 70 ray tracing cores, 280 tensor cores, and an average benchmark score of 27135. That score places it at the 72nd percentile and within 1.7% of the AMD Radeon RX 6700 XT, 1.1% of the NVIDIA GeForce RTX 4070 Mobile, 1.6% of the NVIDIA GeForce RTX 3090, and 1.7% above the NVIDIA RTX A4000.

Any workload requiring sustained 3D rendering, compute, or professional graphics should use the RTX PRO 4000 Blackwell. Its FP32 throughput of 36.83 TFLOPS is roughly 25 times the 840M’s 1,484.8 GFLOPS, and its pixel rate of 197.3 GPixel/s is about 8.5 times higher than the 840M’s 23.20 GPixel/s. The 840M has no benchmark evidence to suggest it competes in that class. The choice is not between two equal performers; it is between an integrated mobile GPU with no measured results and a discrete workstation GPU with validated, competitive scores.