AMD Radeon 840M vs NVIDIA L20 Comparison

Head-to-Head Benchmarks

The AMD Radeon 840M and NVIDIA L20 share no direct head-to-head benchmark results in the database. The 840M has no recorded benchmark scores, while the L20 has two: 274,276 in Geekbench OpenCL and 228,018 in Geekbench Vulkan. The L20's average benchmark score is 251,147, placing it in the 99th percentile of all GPUs tracked. The 840M sits at the 50th percentile with an average benchmark score of zero, meaning no performance data exists for it.

The L20's nearest rivals provide context for its performance level. It leads the NVIDIA PG506-232 by 11.6% (225,124 average score) and the AMD Radeon PRO W7900D by 14.2% (219,827 average score). Conversely, it trails the NVIDIA L40 by 11.6% (284,111 average score) and the NVIDIA RTX 6000 Ada Generation by 12.6% (287,237 average score). These deltas show the L20 sits in a competitive band among high-end server accelerators.

Since the 840M lacks any benchmark scores, no direct wins or losses can be established between these two products. The database records zero wins for each side in head-to-head testing. Any comparison must rely on architectural and specification differences rather than measured performance.

FAQ

Q: Which GPU has a higher benchmark percentile ranking?

A: The NVIDIA L20 ranks in the 99th percentile of all GPUs, while the AMD Radeon 840M ranks in the 50th percentile.

Q: What benchmark scores does the L20 have?

A: The L20 scores 274,276 in Geekbench OpenCL and 228,018 in Geekbench Vulkan, with an average of 251,147.

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

A: No. The database lists no benchmarks for the 840M, and its average benchmark score is zero.

Q: How does the L20 compare to the NVIDIA L40?

A: The L20 trails the NVIDIA L40 by 11.6%, with the L40 averaging 284,111 versus the L20's 251,147.

Q: How does the L20 compare to the NVIDIA RTX 6000 Ada Generation?

A: The L20 trails the RTX 6000 Ada Generation by 12.6%, with the RTX 6000 averaging 287,237.

Q: Which GPU has more shading units?

A: The NVIDIA L20 has 11,776 shading units, while the AMD Radeon 840M has 256.

Architecture Differences

The two GPUs come from different architectural lineages. The AMD Radeon 840M uses RDNA 3.5 architecture on a 4 nm process, built by TSMC. It belongs to the Navi III IGP generation for Strix Point mobile platforms, specifically the Krackan Point chip. The NVIDIA L20 uses Ada Lovelace architecture on a 5 nm process, also from TSMC, and belongs to the Server Ada generation.

Process node differences are modest: 4 nm versus 5 nm. The L20's die is far larger at 609 mm² with 76,300 million transistors, giving a transistor density of 125.3 million per mm². The 840M's transistor count and die size are listed as unknown in the database.

Compute resources differ dramatically. The 840M has 256 shading units, 16 texture mapping units, 8 raster output units, and 4 ray tracing cores. The L20 has 11,776 shading units, 368 texture mapping units, 128 raster output units, 92 ray tracing cores, and 368 tensor cores. The 840M has no tensor cores listed. These differences point to entirely different usage classes: the 840M is an integrated graphics processor for mobile devices, while the L20 is a dedicated server accelerator.

Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The 840M's bus interface is PCIe 4.0 x8, while the L20 uses PCIe 4.0 x16. The 840M has no power connectors and is an IGP, whereas the L20 is a dual-slot card requiring a single 16-pin power connector.

Specification Differences

Clock speeds differ significantly. The 840M has a base clock of 400 MHz and a boost clock of 2900 MHz. The L20 has a base clock of 1440 MHz and a boost clock of 2520 MHz. Despite the lower boost, the L20 runs far more compute units.

Memory configurations are entirely different. The 840M uses system shared memory, with size, type, bus width, and bandwidth all dependent on the host system. The L20 has 48 GB of GDDR6 memory on a 384-bit bus, with 864.0 GB/s of bandwidth and a memory clock of 2250 MHz (18 Gbps effective).

Rates and throughput show the scale gap. The 840M delivers 23.20 GPixel/s pixel rate, 46.40 GTexel/s texture rate, and 1,484.8 GFLOPS FP32 (also 1,484.8 GFLOPS FP16 at a 1:1 ratio). The L20 delivers 322.6 GPixel/s pixel rate, 927.4 GTexel/s texture rate, and 59.35 TFLOPS FP32 (also 59.35 TFLOPS FP16 at 1:1). The L20 is roughly 40 times faster in FP32 throughput.

Power and physical specs reflect their classes. The 840M has a 15 W TDP, while the L20 has a 275 W TDP with a suggested 600 W power supply. The L20 is 267 mm long (10.5 inches) and 111 mm tall (4.4 inches). The 840M's dimensions are not listed. Display outputs also differ: the 840M's outputs are portable device dependent, while the L20 has 4x DisplayPort 1.4a.

Release dates diverge by over a year. The 840M was released on February 28, 2025, while the L20 was released on November 15, 2023. Both remain active in production. The 840M's predecessor is Navi II IGP, and the L20's predecessor is Server Ampere with a successor of Server Hopper.

Where Each One Wins

The NVIDIA L20 wins in every measurable performance category recorded in the database. Its 99th percentile ranking versus the 840M's 50th percentile establishes a clear performance hierarchy. The L20's 59.35 TFLOPS FP32 throughput, 864.0 GB/s memory bandwidth, and 48 GB of dedicated GDDR6 memory position it for compute-heavy server workloads such as AI inference, rendering, and scientific simulation. Its tensor cores (368) and ray tracing cores (92) support these tasks, and its benchmark scores confirm it competes with other high-end server accelerators, sitting between the PG506-232 and L40 in average score.

The AMD Radeon 840M wins in power efficiency and integration. Its 15 W TDP is a fraction of the L20's 275 W, and its IGP form factor with no power connectors suits thin-and-light mobile devices. The 840M uses system shared memory, which simplifies system design and reduces cost. Its 4 nm process node is smaller than the L20's 5 nm node, and its boost clock of 2900 MHz exceeds the L20's 2520 MHz boost. The 840M also carries RDNA 3.5 architecture with 4 ray tracing cores and DirectX 12 Ultimate support, making it suitable for mainstream mobile graphics, including light gaming and general-purpose GPU compute.

The L20's dual-slot design, 267 mm length, and 16-pin power connector require a full server chassis with proper cooling and power delivery. The 840M needs none of that infrastructure. For workloads that fit within the 840M's 1,484.8 GFLOPS FP32 envelope and shared memory capacity, the integrated GPU offers a complete graphics solution in a low-power package. For workloads that demand the L20's 40x FP32 advantage, 48 GB of VRAM, and dedicated tensor cores, the server card is the only option.

The L20's nearest rival comparisons reinforce its position. It beats the PG506-232 by 11.6% and the Radeon PRO W7900D by 14.2%, while trailing the L40 and RTX 6000 Ada Generation by 11.6% and 12.6% respectively. This places the L20 firmly in the upper tier of server GPUs, but not at the absolute top. The 840M has no rival data in the database, so its competitive position cannot be assessed beyond its 50th percentile ranking.

The absence of benchmark scores for the 840M means the database cannot quantify its real-world performance. Its architectural specifications indicate a capable integrated solution for mobile platforms, but measured data is lacking. The L20, by contrast, has verified scores in two major APIs and an average score that places it among the top 1% of all GPUs tracked. The two products serve different markets, and the data reflects that split: one is a low-power integrated GPU for portable devices, the other is a high-throughput server accelerator with dedicated memory and tensor processing capabilities.