NVIDIA GeForce RTX 4090 vs NVIDIA RTX A3000 Mobile Comparison

The data presents a stark generational and market-segment contrast. The NVIDIA RTX A3000 Mobile is an Ampere-era professional mobile GPU, while the NVIDIA GeForce RTX 4090 is an Ada Lovelace flagship desktop part. Their benchmark results and technical specifications show minimal overlap in capability, with the desktop card dominating in every measured metric. This analysis will break down the specific wins, architectural differences, and what the numbers mean for prospective users.

Where Each One Wins

The benchmark results are unambiguous: the NVIDIA GeForce RTX 4090 wins both head-to-head tests, giving it a clean 2-0 record. The RTX A3000 Mobile has zero wins in this comparison. However, the context of these wins matters for understanding the performance split.

The RTX 4090’s victories are not marginal. In Geekbench OpenCL, it scores 255,416 against the A3000 Mobile’s 79,091, a delta of -69% from the perspective of the mobile card. In Geekbench Vulkan, the gap widens further: 271,631 versus 61,189, a delta of -77.5%. These are not close contests; the desktop GPU outperforms the mobile one by factors of roughly 3.2x and 4.4x respectively.

The RTX A3000 Mobile’s role is defined by its portability and power envelope, not by raw performance. Its 70 W TDP and "Portable Device Dependent" display outputs indicate a design for mobile workstations. The RTX 4090, with a 450 W TDP and triple-slot cooler, is a desktop-only part. The data suggests the A3000 Mobile wins on the unquantified metric of physical integration into a laptop chassis, but in every benchmark score, the RTX 4090 is the clear victor. The percentile rankings reinforce this: the RTX 4090 sits at the 88th percentile of all GPUs, while the A3000 Mobile is at the 91st, a counterintuitive result driven by the different benchmark suites used for each.

Architecture Differences

The architectural gap between these two GPUs is generational and fundamental. The RTX A3000 Mobile uses the GA104 chip on the Ampere architecture, built on Samsung’s 8 nm process. It packs 17,400 million transistors into a 392 mm² die, yielding a transistor density of 44.4M per mm². The RTX 4090 uses the AD102 chip on the Ada Lovelace architecture, fabricated by TSMC on a 5 nm node. This newer process allows for 76,300 million transistors on a 609 mm² die, a density of 125.3M per mm².

The core configurations differ massively. The A3000 Mobile has 4,096 shading units, 128 TMUs, 64 ROPs, 32 RT cores, and 128 tensor cores. The RTX 4090 more than quadruples the shading units to 16,384, and scales TMUs to 512, ROPs to 176, RT cores to 128, and tensor cores to 512. This is not an incremental step; it is a full architectural leap across every processing block.

Memory subsystems are equally divergent. The A3000 Mobile uses 6 GB of GDDR6 on a 192-bit bus, delivering 264.0 GB/s of bandwidth. The RTX 4090 uses 24 GB of GDDR6X on a 384-bit bus, achieving 1.01 TB/s. The effective memory clock speeds also differ: 11 Gbps for the mobile card versus 21 Gbps for the desktop card. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API feature parity exists even though hardware capabilities do not.

Clock speeds tell the rest of the story. The A3000 Mobile has a base clock of 600 MHz and a boost of 1230 MHz. The RTX 4090 starts at 2235 MHz base and boosts to 2520 MHz. The desktop card’s higher clocks, combined with its massive core count, produce pixel rates of 443.5 GPixel/s and texture rates of 1,290.2 GTexel/s, versus 78.72 GPixel/s and 157.4 GTexel/s for the mobile part. FP32 performance is 82.58 TFLOPS versus 10.08 TFLOPS, an 8.2x advantage. FP16 is identical at 1:1 ratios for both, but the absolute numbers are the same as FP32.

Head-to-Head Benchmarks

The two head-to-head tests available provide a clear picture of relative performance. In Geekbench OpenCL, the RTX 4090 scores 255,416 against the A3000 Mobile’s 79,091. The delta of -69% means the A3000 Mobile trails by over two-thirds. This is a compute-oriented workload, and the RTX 4090’s 16,384 shading units and 82.58 TFLOPS FP32 throughput dominate the A3000 Mobile’s 4,096 units and 10.08 TFLOPS.

The Geekbench Vulkan test shows an even larger gap. The RTX 4090 scores 271,631, while the A3000 Mobile manages 61,189. The -77.5% delta indicates the mobile card delivers less than a quarter of the desktop card’s performance in this graphics API. Vulkan’s lower-level access to hardware tends to scale well with core count and bandwidth, which explains why the RTX 4090’s advantages in shading units, ROPs, and memory bandwidth translate into an outsized win.

These deltas are consistent with the theoretical specifications. The RTX 4090’s texture rate is 8.2x higher, its pixel rate is 5.6x higher, and its memory bandwidth is 3.8x higher. The Vulkan score delta of -77.5% is slightly worse than the OpenCL delta of -69%, suggesting that the RTX 4090’s architectural efficiency gains are more pronounced in graphics-heavy workloads than in general compute. The A3000 Mobile’s nearest rivals include the NVIDIA Quadro P6000 (0.2% ahead) and AMD Radeon Pro WX 8200 (0.4% ahead), showing it sits in a tight cluster of professional workstation GPUs. The RTX 4090, by contrast, sits near the Intel Arc Pro A60 (0% delta) and AMD Radeon Pro Vega 48 (0.3% ahead), a different competitive set entirely.

FAQ

Q: Which GPU has higher raw compute performance?

A: The NVIDIA GeForce RTX 4090 delivers 82.58 TFLOPS FP32, compared to 10.08 TFLOPS for the RTX A3000 Mobile. This is an 8.2x advantage in theoretical peak throughput.

Q: What is the memory capacity difference?

A: The RTX 4090 has 24 GB of GDDR6X memory on a 384-bit bus, while the RTX A3000 Mobile has 6 GB of GDDR6 on a 192-bit bus. The desktop card offers 1.01 TB/s bandwidth versus 264.0 GB/s.

Q: How do their benchmark scores compare in Vulkan?

A: In Geekbench Vulkan, the RTX 4090 scores 271,631 against the A3000 Mobile’s 61,189. The RTX 4090 leads by 77.5% of the mobile card’s score.

Q: Are both cards using the same manufacturing process?

A: No. The RTX A3000 Mobile uses Samsung’s 8 nm process, while the RTX 4090 uses TSMC’s 5 nm process. This contributes to the RTX 4090’s higher transistor density of 125.3M per mm² versus 44.4M per mm².

Q: What is the TDP difference?

A: The RTX A3000 Mobile has a 70 W TDP, while the RTX 4090 has a 450 W TDP. The RTX 4090 also requires a 16-pin power connector and an 850 W suggested PSU, whereas the mobile card uses no external power connectors.

Q: Which card has more RT cores?

A: The RTX 4090 has 128 RT cores, while the RTX A3000 Mobile has 32. The desktop card also has 512 tensor cores compared to 128 on the mobile part.

Specification Differences

The two cards differ in nearly every measurable specification. The RTX A3000 Mobile uses the GA104 chip on Ampere architecture, while the RTX 4090 uses AD102 on Ada Lovelace. Process nodes are 8 nm (Samsung) versus 5 nm (TSMC). Transistor counts are 17,400 million versus 76,300 million, with die sizes of 392 mm² versus 609 mm².

Core configurations: shading units are 4,096 versus 16,384; TMUs are 128 versus 512; ROPs are 64 versus 176; RT cores are 32 versus 128; tensor cores are 128 versus 512. Clock speeds: base is 600 MHz versus 2235 MHz; boost is 1230 MHz versus 2520 MHz. Memory: 6 GB GDDR6 versus 24 GB GDDR6X; bus width 192-bit versus 384-bit; bandwidth 264.0 GB/s versus 1.01 TB/s; effective memory clock 11 Gbps versus 21 Gbps.

Performance rates: pixel rate is 78.72 GPixel/s versus 443.5 GPixel/s; texture rate is 157.4 GTexel/s versus 1,290.2 GTexel/s; FP32 and FP16 are 10.08 TFLOPS versus 82.58 TFLOPS. Power: TDP is 70 W versus 450 W; the RTX 4090 is triple-slot with a 16-pin connector and 850 W suggested PSU, while the A3000 Mobile has no slot width, no power connectors, and no suggested PSU listed. Physical dimensions: the RTX 4090 is 304 mm long, 137 mm high, and 61 mm wide; the mobile card has no listed dimensions. Display outputs: the RTX 4090 has 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the A3000 Mobile is "Portable Device Dependent." Release dates are 2021-04-11 for the mobile card and 2022-09-19 for the desktop card. The RTX 4090 has a launch MSRP of 1,599 USD.

The Verdict

The data supports a clear conclusion: the NVIDIA GeForce RTX 4090 is the superior performer by every benchmark and specification in this comparison. Its 255,416 OpenCL score and 271,631 Vulkan score dwarf the A3000 Mobile’s 79,091 and 61,189. The RTX 4090’s 82.58 TFLOPS FP32 throughput, 1.01 TB/s memory bandwidth, and 16,384 shading units provide a categorical advantage that no workload type would overcome.

The RTX A3000 Mobile, however, is not without purpose. Its 70 W TDP and portable-device-dependent outputs indicate a design for mobile workstations where physical integration matters more than peak performance. Its 91st percentile ranking among all GPUs shows it is still a capable part in its own context, sitting near the Quadro P6000 and Radeon Pro WX 8200. For users requiring a GPU that fits in a laptop chassis and draws minimal power, the A3000 Mobile is the only viable choice here.

For desktop users seeking maximum compute and graphics performance, the RTX 4090 is the clear pick. Its 24 GB of GDDR6X memory, 128 RT cores, and 512 tensor cores make it suitable for heavy rendering, AI workloads, and high-resolution gaming. The RTX A3000 Mobile cannot compete on any of these fronts. The verdict is straightforward: choose the RTX 4090 for performance, the RTX A3000 Mobile for portability. There is no middle ground in the data.