AMD Radeon 840M vs NVIDIA GeForce RTX 5090 Comparison

Head-to-Head Benchmarks

The recorded data shows an extraordinary performance gap between the AMD Radeon 840M and the NVIDIA GeForce RTX 5090. The RTX 5090 delivers a PassMark G3D score of 39,650, while the Radeon 840M has no recorded benchmark scores, placing it at the 50th percentile among all GPUs versus the RTX 5090's 92nd percentile. This difference in percentile ranking confirms that the RTX 5090 sits firmly in the top tier of graphics hardware, while the 840M occupies a mid-range position for integrated graphics.

In compute workloads, the RTX 5090 achieves a PassMark GPU Compute score of 26,756. The 840M's lack of recorded scores means the database shows zero wins for the AMD part in any head-to-head comparison. The RTX 5090 also demonstrates dominant performance in synthetic DirectX tests, scoring 395 in PassMark DirectX 9, 341 in DirectX 11, and 185 in DirectX 12. Its PassMark DirectX 10 score is 226. The 840M's benchmarks remain entirely unrecorded, indicating either insufficient testing data or performance below the threshold for meaningful comparison.

The Geekbench results further reinforce the RTX 5090's lead. It posts an OpenCL score of 334,370 and a Vulkan score of 376,728. The 3DMark Steel Nomad DX12 test shows a score of 18,355. These figures represent the RTX 5090's substantial compute and graphics throughput capabilities. The average benchmark score for the RTX 5090 across all tests is 79,842, placing it 0.3% ahead of the NVIDIA Tesla P100 PCIe 16 GB (79,605) and 0.6% ahead of the Tesla P100 PCIe 12 GB (79,396). It also leads the AMD Radeon RX 6850M XT by 1.1% (78,940) but trails the AMD Radeon Pro Vega 64X by 1.4% (80,959).

Where Each One Wins

The RTX 5090 wins in every measurable category according to the database. Its 32 GB of GDDR7 memory with a 512-bit bus and 1.79 TB/s bandwidth provides a massive advantage in memory-intensive workloads. The 840M uses system-shared memory with bandwidth described as system dependent, meaning its performance scales with the host system's memory configuration.

For ray tracing, the RTX 5090 includes 170 RT cores, while the 840M has 4. Tensor processing also favors NVIDIA heavily, with 680 tensor cores on the RTX 5090 versus none listed for the AMD part. The RTX 5090's 21,760 shading units, 680 texture mapping units, and 176 render output units dwarf the 840M's 256 shading units, 16 TMUs, and 8 ROPs.

The RTX 5090 achieves a pixel rate of 423.6 GPixel/s and a texture rate of 1,636.8 GTexel/s. The 840M manages 23.20 GPixel/s and 46.40 GTexel/s respectively. Compute throughput shows the starkest contrast: the RTX 5090 delivers 104.8 TFLOPS FP32, while the 840M produces 1,484.8 GFLOPS, which converts to approximately 1.48 TFLOPS. Both support FP16 at a 1:1 ratio with their FP32 rates.

Architecture Differences

The two GPUs represent fundamentally different design philosophies and market segments. The AMD Radeon 840M uses the Krackan Point chip built on RDNA 3.5 architecture, manufactured on a 4 nm process at TSMC. It belongs to the Navi III IGP generation for Strix Point Mobile, indicating its role as an integrated graphics processor for laptops and portable devices. Its predecessor is listed as Navi II IGP.

The NVIDIA GeForce RTX 5090 uses the GB202 chip based on Blackwell 2.0 architecture, manufactured on a 5 nm process, also at TSMC. It contains 92,200 million transistors on a 750 mm² die, with a transistor density of 122.9M per mm². The 840M's transistor count and die size are listed as unknown in the database. The RTX 5090's predecessor is the GeForce 40 series, and its successor is listed as GeForce 60.

The process node difference is notable: AMD uses a smaller 4 nm process versus NVIDIA's 5 nm, though the RTX 5090's massive die and transistor count reflect its discrete, high-end design. The 840M operates as an IGP with no power connectors and a 15 W TDP, while the RTX 5090 is a dual-slot card requiring a single 16-pin power connector and a 575 W TDP. The suggested power supply for the RTX 5090 is 950 W.

Bus interfaces also differ substantially. The 840M uses PCIe 4.0 x8, while the RTX 5090 uses PCIe 5.0 x16. Display outputs on the 840M are described as portable device dependent, whereas the RTX 5090 provides 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The NVIDIA GeForce RTX 5090 has an average benchmark score of 79,842, while the AMD Radeon 840M has no recorded benchmarks and an average score of 0.

Q: How do their memory configurations compare?

A: The RTX 5090 uses 32 GB of GDDR7 memory on a 512-bit bus with 1.79 TB/s bandwidth. The 840M uses system-shared memory with system-dependent bandwidth.

Q: What are the TDP requirements?

A: The RTX 5090 has a 575 W TDP with a suggested 950 W power supply. The 840M has a 15 W TDP and uses no power connectors as an integrated GPU.

Q: Which GPU supports ray tracing hardware?

A: Both support ray tracing, but the RTX 5090 includes 170 RT cores while the 840M has 4 RT cores.

Q: What is the release timeline for each product?

A: The RTX 5090 was released on January 29, 2025, while the 840M was released on February 28, 2025.

Q: How does the RTX 5090 compare to its nearest rivals?

A: The RTX 5090 is 0.3% ahead of the Tesla P100 PCIe 16 GB, 0.6% ahead of the Tesla P100 PCIe 12 GB, 1.1% ahead of the Radeon RX 6850M XT, and 1.4% behind the Radeon Pro Vega 64X.

Specification Differences

The two GPUs differ across nearly every specification field. The RTX 5090 has a base clock of 2017 MHz and boost clock of 2407 MHz, while the 840M runs at 400 MHz base and 2900 MHz boost. The RTX 5090's memory clock is 1750 MHz with 28 Gbps effective, while the 840M's memory clock is system shared.

Shading units number 21,760 on the RTX 5090 versus 256 on the 840M. TMUs are 680 versus 16, and ROPs are 176 versus 8. RT cores are 170 versus 4, and tensor cores are 680 versus none. The RTX 5090 measures 304 mm in length, 137 mm in height, and 40 mm in width, while the 840M has no recorded dimensions as an IGP.

The RTX 5090 is a dual-slot card, while the 840M is an IGP. Power connectors are 1x 16-pin for NVIDIA and none for AMD. The RTX 5090's launch MSRP is 1,999 USD. The 840M has no launch MSRP recorded.

The Verdict

The data clearly indicates that the NVIDIA GeForce RTX 5090 is the superior performer in every recorded benchmark category. Its 92nd percentile ranking versus the 840M's 50th percentile demonstrates a massive performance separation. The RTX 5090's 104.8 TFLOPS FP32 compute, 1.79 TB/s memory bandwidth, and 170 RT cores position it as a top-tier discrete graphics solution for demanding workloads.

The AMD Radeon 840M, with its 15 W TDP, integrated design, and system-shared memory, serves a completely different purpose. Its 4 nm process and RDNA 3.5 architecture provide efficient performance for portable devices, but its 1,484.8 GFLOPS FP32 and 4 RT cores place it far below the RTX 5090's capabilities. The 840M's lack of recorded benchmark scores further confirms its positioning as a modest integrated solution rather than a high-performance discrete card.

Users requiring maximum graphics throughput, ray tracing performance, or compute acceleration should select the RTX 5090 based on the recorded data. The RTX 5090's 32 GB GDDR7 memory and 680 tensor cores make it suitable for AI workloads and high-resolution gaming. The 840M, conversely, suits power-constrained portable systems where its 15 W TDP and integrated nature provide adequate graphics without dedicated hardware.

The RTX 5090's nearest rival comparisons show it competing closely with professional Tesla P100 cards and high-end mobile Radeon GPUs, reinforcing its position among the fastest consumer graphics processors. The 840M has no rival data recorded, indicating its benchmark presence is minimal. Both GPUs support modern API standards including DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, ensuring broad software compatibility despite their performance differences.