NVIDIA GeForce RTX 5090 vs NVIDIA RTX A4500 Mobile Comparison

The NVIDIA RTX A4500 Mobile and the NVIDIA GeForce RTX 5090 are not competitors in any practical sense; the data positions them at opposite ends of the performance and power spectrum. The RTX 5090 is decisively superior in every benchmark recorded, delivering over three times the compute performance in OpenCL and nearly five times in Vulkan. The RTX A4500 Mobile’s only advantage lies in its dramatically lower power draw and mobile form factor. The verdict is clear: the RTX 5090 is for users who demand absolute maximum performance irrespective of power constraints, while the RTX A4500 Mobile serves professional workflows requiring a portable, efficient solution with adequate performance for its class.

The Verdict

The data is unambiguous: the NVIDIA GeForce RTX 5090 outperforms the NVIDIA RTX A4500 Mobile by a massive margin in every shared benchmark. In Geekbench OpenCL, the RTX 5090 scores 334,370 against 105,307 for the A4500 Mobile, a delta of -68.5% from the A4500’s perspective. In Geekbench Vulkan, the gap widens further: 376,728 versus 76,960, a -79.6% delta. If raw compute headroom is the sole criterion, the RTX 5090 is the only rational choice.

However, the RTX A4500 Mobile is not without a purpose. Its 140 W TDP is a fraction of the RTX 5090’s 575 W, and it requires no external power connectors, making it viable for portable workstations. The RTX 5090, by contrast, demands a dual-slot footprint, a 16-pin power connector, and a 950 W suggested power supply. The A4500 Mobile also holds a higher percentile rank (93rd) than the RTX 5090 (92nd) relative to all GPUs, suggesting that within its power envelope it is a remarkably efficient performer. Users needing a mobile workstation GPU for CAD, rendering, or scientific compute where power and space are limited should choose the A4500 Mobile. Users needing the fastest possible GPU for desktop compute, AI, or high-end gaming should choose the RTX 5090 without hesitation.

FAQ

Q: Which GPU has higher raw compute performance?

A: The NVIDIA GeForce RTX 5090 is overwhelmingly faster. It scores 334,370 in Geekbench OpenCL versus 105,307 for the RTX A4500 Mobile, and 376,728 in Geekbench Vulkan versus 76,960. The RTX 5090 also delivers 104.8 TFLOPS FP32 compared to 17.66 TFLOPS for the A4500 Mobile.

Q: How do their power requirements compare?

A: The RTX A4500 Mobile has a 140 W TDP and uses no power connectors, while the RTX 5090 has a 575 W TDP, requires a 16-pin connector, and has a suggested power supply of 950 W. This makes the A4500 Mobile far more suitable for battery-powered or thermally constrained systems.

Q: Which GPU has more memory and bandwidth?

A: The RTX 5090 has 32 GB of GDDR7 memory on a 512-bit bus, yielding 1.79 TB/s bandwidth. The RTX A4500 Mobile has 16 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s. The RTX 5090 offers double the capacity and roughly 3.5 times the bandwidth.

Q: Are there architectural differences that explain the performance gap?

A: Yes. The RTX 5090 uses the GB202 chip on a 5 nm TSMC process with 92,200 million transistors, while the A4500 Mobile uses GA104 on an 8 nm Samsung process with 17,400 million transistors. The RTX 5090 also has 21,760 shading units, 170 RT cores, and 680 tensor cores, versus 5,888 shading units, 46 RT cores, and 184 tensor cores on the A4500 Mobile.

Q: Which GPU is more efficient relative to its performance?

A: The RTX A4500 Mobile has a higher percentile rank (93rd) than the RTX 5090 (92nd) despite far lower absolute scores. Its average benchmark score of 91,134 is actually higher than the RTX 5090’s 79,842, which includes many lower-scoring DirectX tests. This suggests the A4500 Mobile delivers more consistent performance across a wider range of workloads relative to its power draw.

Q: What is the launch status of each GPU?

A: The RTX A4500 Mobile is end-of-life, released on 2022-03-21, while the RTX 5090 is active, released on 2025-01-29. The RTX 5090 has a launch MSRP of 1,999 USD; no MSRP is listed for the A4500 Mobile.

Architecture Differences

The two GPUs belong to entirely different architectural generations, explaining their divergent capabilities. The RTX A4500 Mobile is built on the Ampere architecture with the GA104 chip, fabricated on an 8 nm process at Samsung. It packs 17,400 million transistors on a 392 mm² die, yielding a transistor density of 44.4 million per mm². The RTX 5090, in contrast, uses the Blackwell 2.0 architecture with the GB202 chip, fabricated on a 5 nm process at TSMC. It contains 92,200 million transistors on a 750 mm² die, achieving a density of 122.9 million per mm² — nearly three times the density of the Ampere chip.

The compute resources scale accordingly. The A4500 Mobile features 5,888 shading units, 184 TMUs, and 96 ROPs, with 46 RT cores and 184 tensor cores. The RTX 5090 more than triples the shading units to 21,760, increases TMUs to 680 and ROPs to 176, and raises RT cores to 170 and tensor cores to 680. The pixel rate jumps from 144.0 GPixel/s on the A4500 Mobile to 423.6 GPixel/s on the RTX 5090, while texture rate rises from 276.0 GTexel/s to 1,636.8 GTexel/s. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, but the RTX 5090’s newer architecture delivers these APIs with far more hardware muscle.

The memory subsystem is also architecturally distinct. The A4500 Mobile uses GDDR6 with a 256-bit bus and 512.0 GB/s bandwidth. The RTX 5090 uses GDDR7 with a 512-bit bus and 1.79 TB/s bandwidth. The RTX 5090’s memory clock is 1750 MHz (28 Gbps effective) versus 2000 MHz (16 Gbps effective) on the A4500 Mobile, but the wider bus and newer memory type give the RTX 5090 a commanding bandwidth advantage.

Specification Differences

The relevant specification differences are stark. The RTX A4500 Mobile has a base clock of 930 MHz and boost clock of 1500 MHz, while the RTX 5090 runs at 2017 MHz base and 2407 MHz boost. The A4500 Mobile offers 16 GB GDDR6, whereas the RTX 5090 offers 32 GB GDDR7. Memory bus width is 256-bit versus 512-bit, and bandwidth is 512.0 GB/s versus 1.79 TB/s. The A4500 Mobile has 5,888 shading units, 184 TMUs, 96 ROPs, 46 RT cores, and 184 tensor cores; the RTX 5090 has 21,760 shading units, 680 TMUs, 176 ROPs, 170 RT cores, and 680 tensor cores. FP32 performance is 17.66 TFLOPS versus 104.8 TFLOPS.

Power and physical specifications diverge dramatically. The A4500 Mobile has a 140 W TDP and no power connectors, while the RTX 5090 has a 575 W TDP, a 16-pin connector, and a 950 W suggested PSU. The RTX 5090 is dual-slot, measuring 304 mm long, 137 mm high, and 40 mm wide; the A4500 Mobile’s dimensions are listed as portable-device dependent. The bus interface is PCIe 4.0 x16 for the A4500 Mobile and PCIe 5.0 x16 for the RTX 5090. Display outputs are portable-device dependent on the A4500 Mobile, while the RTX 5090 has 1x HDMI 2.1b and 3x DisplayPort 2.1b. The production status is end-of-life for the A4500 Mobile and active for the RTX 5090.

Head-to-Head Benchmarks

Two direct benchmark comparisons exist, and the RTX 5090 wins both by enormous margins. In Geekbench OpenCL, the RTX 5090 scores 334,370 against the A4500 Mobile’s 105,307, a delta of -68.5% relative to the A4500. This means the RTX 5090 is roughly 3.17 times faster in OpenCL compute workloads. In Geekbench Vulkan, the RTX 5090 scores 376,728 versus 76,960, a delta of -79.6%. The RTX 5090 is approximately 4.9 times faster in Vulkan. These results are consistent with the raw specification differences: the RTX 5090 has 3.7 times the shading units, 3.7 times the RT cores, and 3.7 times the tensor cores, with a 5.9 times higher FP32 throughput.

The A4500 Mobile’s average benchmark score across all tests is 91,134, which is actually higher than the RTX 5090’s 79,842. This is because the RTX 5090’s average is dragged down by low scores in Passmark DirectX 9 (395), DirectX 10 (226), DirectX 11 (341), and DirectX 12 (185), which are legacy tests that do not stress its modern architecture. In contrast, the A4500 Mobile only has two benchmarks recorded, both Geekbench, which are more representative of its compute strengths. The RTX 5090’s Passmark G3D score of 39,650 and GPU compute score of 26,756 show it excels in modern workloads, while its G2D score of 1,413 indicates strong 2D performance.

Where Each One Wins

The RTX 5090 wins in every scenario where absolute performance is paramount. Its 104.8 TFLOPS FP32 and 104.8 TFLOPS FP16 make it a compute powerhouse for AI training, scientific simulation, and high-fidelity rendering. The 32 GB GDDR7 memory with 1.79 TB/s bandwidth allows it to handle massive datasets and textures without paging. Its 170 RT cores and 680 tensor cores provide substantial acceleration for ray-traced graphics and deep learning workloads. The RTX 5090 is also the only choice for desktop use, given its dual-slot design and fixed dimensions, and its PCIe 5.0 interface ensures maximum data transfer rates to the host system.

The RTX A4500 Mobile wins in portability and efficiency. Its 140 W TDP and lack of power connectors mean it can be integrated into laptops and compact workstations without exotic cooling or power delivery. Its 93rd percentile ranking among all GPUs suggests it delivers near-top-tier performance relative to its power draw, making it ideal for mobile professionals who need CUDA acceleration, 16 GB of memory, and 512.0 GB/s bandwidth in a battery-powered system. The A4500 Mobile’s PCIe 4.0 x16 interface is still capable, and its end-of-life status means it may be available at reduced costs in legacy systems, though no MSRP is listed. For tasks like CAD, light rendering, and GPU-accelerated analytics on the go, the A4500 Mobile is the pragmatic choice. For everything else, the RTX 5090 is the definitive winner.