AMD Radeon 840M vs NVIDIA GeForce RTX 4070 Mobile Comparison

Head-to-Head Benchmarks

The AMD Radeon 840M and NVIDIA GeForce RTX 4070 Mobile occupy entirely different tiers of the mobile graphics stack. The recorded data shows no direct head-to-head benchmark comparisons between the two, but the RTX 4070 Mobile has a substantial portfolio of measured results while the 840M has none recorded. This absence of direct benchmark data for the 840M means the comparison must rely on architectural specifications and the RTX 4070 Mobile's established performance profile.

The RTX 4070 Mobile delivers a Passmark G3D score of 19,587 and a Passmark GPU Compute score of 8,399. In Geekbench OpenCL it reaches 109,197 points, and in Geekbench Vulkan it scores 108,367. The 840M has no recorded benchmark scores in the database, so the numerical comparison is one-sided. The RTX 4070 Mobile's average benchmark score stands at 27,435, placing it in the 73rd percentile of all GPUs tracked. The 840M sits at the 50th percentile with an average score of zero due to missing data.

The RTX 4070 Mobile's nearest rivals in the database include the AMD Radeon RX 6700 XT with an average score of 27,425, which is essentially identical at a 0% delta, and the NVIDIA GeForce RTX 3090 at 27,565, which is 0.5% higher. The NVIDIA RTX PRO 4000 Blackwell trails by 1.1% at 27,135, while the AMD Radeon Pro Vega 20 leads by 1.5% at 27,839. These figures indicate the RTX 4070 Mobile sits in a tightly contested performance band where single-digit percentage differences separate it from desktop-class rivals.

Architecture Differences

The architectural gap between these two GPUs is fundamental. 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 platforms. The NVIDIA GeForce RTX 4070 Mobile uses the AD106 chip with Ada Lovelace architecture, manufactured on a 5 nm process at TSMC, part of the GeForce 40 Mobile generation. Both use TSMC as the foundry, but the 840M's 4 nm node is smaller.

The transistor counts reveal the scale difference. The RTX 4070 Mobile packs 22,900 million transistors on a 188 mm² die, yielding a transistor density of 121.8 million per square millimeter. The 840M's transistor count and die size are listed as unknown in the database. This makes direct physical comparison impossible, but the RTX 4070 Mobile's transistor budget is clearly far larger given its dedicated discrete GPU design versus the 840M's integrated graphics processor role.

Execution resources differ massively. The RTX 4070 Mobile has 4,608 shading units, 144 texture mapping units, and 48 raster operation units. The 840M has 256 shading units, 16 TMUs, and 8 ROPs. The RTX 4070 Mobile also carries 36 ray tracing cores and 144 tensor cores, while the 840M has 4 ray tracing cores and no tensor cores at all. These are not incremental differences; the RTX 4070 Mobile has 18 times the shading units and 9 times the ROPs.

Clock behavior also diverges. The 840M has a 400 MHz base clock and a 2,900 MHz boost clock. The RTX 4070 Mobile has a 1,395 MHz base clock and a 1,695 MHz boost clock. The 840M boosts to nearly double the RTX 4070 Mobile's boost frequency, but this does little to close the resource gap. The 840M's pixel rate is 23.20 GPixel/s and its texture rate is 46.40 GTexel/s. The RTX 4070 Mobile achieves 81.36 GPixel/s and 244.1 GTexel/s, representing roughly 3.5 times and 5.3 times the rates respectively.

Memory configurations are in different classes entirely. The 840M uses system shared memory with system-dependent bandwidth, while the RTX 4070 Mobile has 8 GB of dedicated GDDR6 memory on a 128-bit bus with 256.0 GB/s of bandwidth. The memory clock for the RTX 4070 Mobile is 2000 MHz with 16 Gbps effective data rate. The 840M's memory type and bus width are both listed as system shared, meaning it relies on the host system's RAM and memory controller.

The Verdict

The data indicates these GPUs serve completely separate market segments. The RTX 4070 Mobile is a high-performance discrete solution for gaming and compute workloads, while the 840M is an integrated graphics processor for power-efficient portable systems. The RTX 4070 Mobile's 15.62 TFLOPS of FP32 performance dwarfs the 840M's 1,484.8 GFLOPS, a factor of roughly 10.5 times. In FP16, both deliver 1:1 ratios with their FP32 figures, so the same ratio applies.

The RTX 4070 Mobile's 73rd percentile ranking versus the 840M's 50th percentile confirms the performance hierarchy. The RTX 4070 Mobile's TDP of 115 W versus the 840M's 15 W shows the power envelope difference. Both are listed as IGP slot width with no power connectors, but the 840M's 15 W figure aligns with integrated graphics, while the 115 W RTX 4070 Mobile is clearly a discrete part despite the same slot width classification.

The 840M belongs in ultraportable laptops where battery life and low heat output matter more than raw performance. The RTX 4070 Mobile belongs in gaming laptops and mobile workstations where the user accepts higher power draw for substantially higher frame rates and compute throughput. The database does not record a single benchmark win for the 840M because it has no benchmark entries, while the RTX 4070 Mobile has nine recorded test results across OpenCL, Vulkan, and multiple Passmark categories.

Specification Differences

The two GPUs differ in nearly every measurable specification. The RTX 4070 Mobile is a GeForce 40-series part with the AD106 chip, while the 840M is a Krackan Point IGP. The RTX 4070 Mobile uses 5 nm process technology; the 840M uses 4 nm. The RTX 4070 Mobile has 22,900 million transistors on a 188 mm² die; the 840M lists both as unknown. The RTX 4070 Mobile's transistor density is 121.8 million per square millimeter; the 840M has no recorded density.

Clock speeds differ: the 840M runs at 400 MHz base and 2,900 MHz boost, while the RTX 4070 Mobile runs at 1,395 MHz base and 1,695 MHz boost. Memory is system shared on the 840M versus 8 GB GDDR6 on the RTX 4070 Mobile with a 128-bit bus and 256.0 GB/s bandwidth. The 840M has 256 shading units, 16 TMUs, 8 ROPs, and 4 ray tracing cores. The RTX 4070 Mobile has 4,608 shading units, 144 TMUs, 48 ROPs, 36 ray tracing cores, and 144 tensor cores.

Pixel rate is 23.20 GPixel/s on the 840M versus 81.36 GPixel/s on the RTX 4070 Mobile. Texture rate is 46.40 GTexel/s versus 244.1 GTexel/s. FP32 compute is 1,484.8 GFLOPS versus 15.62 TFLOPS. FP16 matches each card's FP32 figure at 1:1 ratios. The 840M has a 15 W TDP; the RTX 4070 Mobile has a 115 W TDP. Both use PCIe 4.0 x8 interfaces and have portable device dependent display outputs. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The 840M released on 2025-02-28, while the RTX 4070 Mobile released on 2023-01-02. The 840M's predecessor is Navi II IGP with no successor listed. The RTX 4070 Mobile's predecessor is GeForce 30 Mobile and its successor is GeForce 50 Mobile. Neither has a launch MSRP recorded.

FAQ

Q: Which GPU has more shading units?

A: The RTX 4070 Mobile has 4,608 shading units, while the 840M has 256 shading units.

Q: How much memory does each GPU use?

A: The 840M uses system shared memory with system-dependent bandwidth. The RTX 4070 Mobile has 8 GB of GDDR6 memory on a 128-bit bus with 256.0 GB/s bandwidth.

Q: What are the TDP ratings?

A: The 840M has a 15 W TDP, while the RTX 4070 Mobile has a 115 W TDP.

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 RTX 4070 Mobile's average benchmark score?

A: The RTX 4070 Mobile has an average benchmark score of 27,435 and sits in the 73rd percentile of all GPUs.

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

A: No, the database contains no benchmark entries for the 840M. Its average benchmark score is zero, and it has no nearest rivals listed.

Where Each One Wins

The RTX 4070 Mobile wins decisively in every performance category where data exists. Its 15.62 TFLOPS FP32 compute is roughly 10.5 times the 840M's 1,484.8 GFLOPS. Its 81.36 GPixel/s pixel rate is 3.5 times the 840M's 23.20 GPixel/s. Its 244.1 GTexel/s texture rate is 5.3 times the 840M's 46.40 GTexel/s. The RTX 4070 Mobile's 36 ray tracing cores versus 4 on the 840M gives it a substantial advantage in ray-traced workloads, and its 144 tensor cores provide AI acceleration capability that the 840M lacks entirely.

The 840M wins in power efficiency and physical integration. Its 15 W TDP is dramatically lower than the RTX 4070 Mobile's 115 W, making it suitable for thin-and-light systems where the RTX 4070 Mobile would require substantial cooling and battery capacity. The 840M's 4 nm process node is newer than the RTX 4070 Mobile's 5 nm node, and its 2,900 MHz boost clock is significantly higher than the RTX 4070 Mobile's 1,695 MHz. The 840M also benefits from a later release date of 2025-02-28 compared to 2023-01-02 for the RTX 4070 Mobile.

For gaming at high settings and resolutions, the RTX 4070 Mobile's 8 GB dedicated GDDR6 memory with 256.0 GB/s bandwidth provides the capacity and speed needed for modern textures and assets. The 840M's system shared memory has no dedicated bandwidth figure, meaning performance depends entirely on the host laptop's memory configuration. For productivity workloads like 3D rendering and GPU compute, the RTX 4070 Mobile's Passmark GPU Compute score of 8,399 demonstrates capability, while the 840M has no recorded compute performance.

The RTX 4070 Mobile's nearest rival data shows it competes with desktop-class cards like the RX 6700 XT and RTX 3090, with deltas of 0% and -0.5% respectively. This places it in a performance tier that the 840M cannot approach based on the architectural specifications. The 840M's role is to provide basic graphics acceleration for everyday computing, light gaming, and media playback in power-constrained devices, while the RTX 4070 Mobile targets users who require high frame rates, ray tracing, and compute throughput.