NVIDIA GeForce RTX 4090 Mobile vs NVIDIA RTX A1000 Comparison

The database entry for the NVIDIA GeForce RTX 4090 Mobile and the NVIDIA RTX A1000 covers two very different products: a flagship laptop gaming GPU and a compact professional workstation card. Both remain active in the database, both come from NVIDIA, and both support DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, but the recorded measurements show the RTX 4090 Mobile delivering roughly three to four times the compute throughput of the RTX A1000 in the shared cross-platform tests. The gap in graphics benchmarks, however, is far narrower than the raw silicon gap suggests, which makes this pairing an interesting study in how workload type shapes real outcomes.

The Verdict

The recorded data points in one clear direction for performance seekers: the RTX 4090 Mobile wins both head-to-head benchmarks, taking the Geekbench OpenCL test by 247.2% and the Geekbench Vulkan test by 244.5%. Its percentile standing against all GPUs in the database is 84, versus 79 for the RTX A1000, and its average benchmark score of 43667 edges out the A1000's 34207.

But the averages hide a nuance. The A1000's percentile of 79 is remarkably close to the 4090 Mobile's 84 given the enormous difference in shader count and memory bandwidth. Users who need maximum throughput for gaming, rendering, or GPU compute should pick the RTX 4090 Mobile based on these numbers. Users whose priority is a single-slot professional card with quad mini-DisplayPort 1.4a outputs for multi-monitor workstation duty will find the A1000's profile more relevant; its competitive average score, sitting within a fraction of a percent of cards like the RTX A2000 12 GB and the TITAN V, indicates it holds its own in mixed workloads despite the smaller die.

Architecture Differences

These two GPUs belong to different architecture generations and different product classes. The RTX 4090 Mobile is built on the AD103 chip using NVIDIA's Ada Lovelace architecture, fabricated at TSMC on a 5 nm process. The RTX A1000 uses the GA107 chip on the Ampere architecture, fabricated at Samsung on an 8 nm process.

The process gap translates directly into density and scale. The AD103 packs 45,900 million transistors onto a 379 mm² die, for a density of 121.1M transistors per mm². The GA107 carries 8,700 million transistors on a 200 mm² die at 43.5M per mm². The 4090 Mobile is simply a much larger, denser piece of silicon.

The execution resource counts follow the same pattern. The 4090 Mobile fields 9728 shading units, 304 texture mapping units, 112 render output units, 76 RT cores, and 304 tensor cores. The A1000 has 2304 shading units, 72 TMUs, 32 ROPs, 18 RT cores, and 72 tensor cores. In every category the mobile flagship holds a multiple of the workstation card's resources.

Clock behavior differs notably. The 4090 Mobile runs a 1335 MHz base and 1695 MHz boost, a narrow range that keeps clocks high across the board. The A1000 runs 727 MHz base with a 1462 MHz boost, a much wider spread, meaning its base frequency sits at roughly half its peak.

Memory subsystems diverge sharply. The 4090 Mobile pairs 16 GB of GDDR6 on a 256-bit bus at 18 Gbps effective, delivering 576.0 GB/s of bandwidth. The A1000 carries 8 GB of GDDR6 on a 128-bit bus at 12 Gbps effective, for 192.0 GB/s. That is a threefold bandwidth advantage for the Ada part, plus double the capacity.

Power and form factor separate them further. The 4090 Mobile is specified at 120 W as an integrated mobile part with no power connectors and a PCIe 4.0 x16 interface. The A1000 is a 50 W single-slot card measuring 163 mm long and 69 mm tall, drawing slot power only, with a suggested 250 W system power supply and a PCIe 4.0 x8 interface. The A1000 also brings four mini-DisplayPort 1.4a outputs, whereas the 4090 Mobile's display support is device dependent since it lives inside laptops.

Theoretical rates underscore the divide. The 4090 Mobile reaches 32.98 TFLOPS FP32, 189.8 GPixel/s pixel rate, and 515.3 GTexel/s texture rate, against 6.737 TFLOPS, 46.78 GPixel/s, and 105.3 GTexel/s for the A1000. Both perform FP16 at a 1:1 ratio with FP32. Lineage also differs: the 4090 Mobile succeeds the GeForce 30 Mobile line and precedes the GeForce 50 Mobile generation, while the A1000 descends from Quadro Turing and precedes the Workstation Ada line.

Where Each One Wins

The RTX 4090 Mobile owns every recorded head-to-head measurement, so its territory is raw capability. With 304 tensor cores and 76 RT cores backed by 576.0 GB/s of bandwidth, it is the clear pick for heavy graphics and compute workloads: gaming at high resolutions, ray-traced content, and OpenCL or Vulkan compute jobs where its Geekbench scores of 180831 and 170774 tower over the A1000's 52078 and 49574.

Its Passmark profile reinforces this. The database records a Passmark G3D score of 27212, a GPU compute score of 12347, a G2D score of 984, and DirectX 9, 10, 11, and 12 results of 310, 173, 262, and 107 respectively.

The A1000's wins are structural rather than numeric. It cannot claim a single head-to-head benchmark victory, yet it posts an average benchmark score of 34207 that lands it within 0.2% of the RTX A2000 12 GB, 0.2% ahead of the Radeon RX 560 XT, 0.6% ahead of the Radeon RX 480, and only 0.4% behind the TITAN V. For a 50 W single-slot card, that proximity to full-size parts is its core argument. Its sole recorded modern graphics test, 3DMark Steel Nomad DirectX 12 at 969 points, plus its quad DisplayPort output configuration, define its niche: space-constrained professional systems driving multiple displays.

FAQ

Q: Which GPU is faster in the shared benchmarks?

A: The RTX 4090 Mobile wins both head-to-head tests, scoring 180831 versus 52078 in Geekbench OpenCL (a 247.2% advantage) and 170774 versus 49574 in Geekbench Vulkan (244.5%).

Q: How much more memory bandwidth does the RTX 4090 Mobile have?

A: 576.0 GB/s versus 192.0 GB/s for the A1000, exactly three times the bandwidth, along with 16 GB of capacity versus 8 GB.

Q: How do their database percentiles compare?

A: The RTX 4090 Mobile sits in the 84th percentile against all GPUs; the RTX A1000 sits in the 79th percentile, a surprisingly small gap given the hardware differences.

Q: What process node does each use?

A: The 4090 Mobile's AD103 is built on TSMC's 5 nm process; the A1000's GA107 uses Samsung's 8 nm process.

Q: Which card suits a compact workstation with multiple monitors?

A: The RTX A1000: it is a single-slot, 50 W card with four mini-DisplayPort 1.4a outputs and a 163 mm length, requiring only a 250 W suggested power supply.

Q: Do both support the same graphics APIs?

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

Head-to-Head Benchmarks

Only two tests appear in both products' records, and the RTX 4090 Mobile sweeps them.

In Geekbench OpenCL, the 4090 Mobile scores 180831 against the A1000's 52078, a 247.2% margin. This aligns almost perfectly with the hardware ratios: the Ada part has roughly four times the shading units, tensor cores, and RT cores, plus three times the memory bandwidth. OpenCL compute scales with those resources, and the score reflects it.

Geekbench Vulkan tells the same story at 170774 versus 49574, a 244.5% delta. Vulkan compute workloads benefit from the 4090 Mobile's 32.98 TFLOPS FP32 throughput versus the A1000's 6.737 TFLOPS, and its much higher texture rate of 515.3 GTexel/s versus 105.3 GTexel/s.

The counterpoint sits in the aggregate database numbers. Despite losing every direct test by a wide margin, the A1000's average score of 34207 sits just 21.6% behind the 4090 Mobile's 43667, and its 79th percentile trails the flagship's 84th by only five points. That discrepancy exists because the averages incorporate different test suites, including the A1000's 3DMark Steel Nomad result and the 4090 Mobile's Passmark suite. The interpretation: in compute-bound cross-platform tests the 4090 Mobile is overwhelming, while in mixed graphics workloads the gap between a modern low-power workstation card and a flagship mobile gaming GPU is narrower than the spec sheets imply. Context from their rival clusters supports this, as the A1000 competes with cards like the TITAN V while the 4090 Mobile trades blows with the RTX A6000, which holds a slim 0.9% edge over it.

For the database verdict: the RTX 4090 Mobile is the performance choice on every shared measurement; the RTX A1000 is the form-factor and efficiency choice whose benchmark standing against its own peer group remains competitive.