AMD Radeon RX 6650M vs NVIDIA RTX A4500 Comparison

The NVIDIA RTX A4500 and AMD Radeon RX 6650M occupy very different corners of the GPU market, and the benchmark data reflects that gap clearly. The RTX A4500 is a desktop workstation card built on the GA102 chip, while the RX 6650M is a mobile part using the Navi 23 die. Across the two shared benchmark tests in the data, the RTX A4500 wins decisively, but the RX 6650M’s much lower power draw and mobile form factor make it a legitimate option for specific portable workloads. This analysis breaks down the numbers, architecture, and use cases strictly from the provided facts.

Head-to-Head Benchmarks

The head-to-head results are lopsided. In Geekbench OpenCL, the RTX A4500 scores 141,837 against the RX 6650M’s 65,800. That is a delta of 115.6%, meaning the NVIDIA card delivers more than double the raw compute performance in this test. The RTX A4500 also wins Geekbench Vulkan with a score of 129,980 versus 77,735, a 67.2% advantage. Across both tests, the RTX A4500 takes 2 wins, while the RX 6650M has 0. There is no single benchmark in the data where the AMD mobile GPU comes out ahead.

Interpreting these scores relative to their peers reinforces the gap. The RTX A4500’s average benchmark score is 91,671, placing it in the 93rd percentile of all GPUs. Its nearest rival, the NVIDIA RTX A4500 Mobile, averages 91,134 (0.6% lower), while the AMD Radeon Instinct MI60 averages 92,466 (0.9% higher). The RX 6650M, by contrast, averages 71,768, sitting in the 91st percentile. Its closest competitor is the NVIDIA TITAN X Pascal at 72,098, which is 0.5% higher, and the AMD Radeon Pro Vega 64 at 72,379, which is 0.8% higher. So while both cards are above the 90th percentile, the RTX A4500 is roughly 27.8% ahead of the RX 6650M in average score (91,671 vs 71,768).

The Vulkan gap is worth noting because it is smaller than the OpenCL gap. A 67.2% lead in Vulkan versus 115.6% in OpenCL suggests the AMD architecture handles Vulkan overhead relatively better, but the absolute performance difference remains massive. The RTX A4500’s FP32 throughput of 23.65 TFLOPS dwarfs the RX 6650M’s 8.659 TFLOPS, which explains the OpenCL result. In Vulkan, the RX 6650M’s higher boost clock of 2416 MHz (versus 1650 MHz on the RTX A4500) helps it close the gap slightly, but not enough to challenge the desktop card’s lead.

Architecture Differences

The two GPUs come from different foundries and design philosophies. The RTX A4500 uses the GA102 chip on an 8 nm Samsung process, packing 28,300 million transistors into a 628 mm² die. The RX 6650M uses the Navi 23 chip on a 7 nm TSMC process, with 11,060 million transistors on a 237 mm² die. The transistor density is nearly identical — 45.1M per mm² for NVIDIA versus 46.7M per mm² for AMD — but the RTX A4500’s much larger die gives it a 2.56x transistor count advantage.

Core configuration differs sharply. The RTX A4500 has 7,168 shading units, 224 TMUs, 96 ROPs, 56 RT cores, and 224 tensor cores. The RX 6650M has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor cores listed. That is exactly 4x more shading units and 2x more TMUs and RT cores on the NVIDIA side. The ROP count is 96 versus 64, a 50% advantage. These core counts directly drive the fill rate numbers: the RTX A4500 achieves 158.4 GPixel/s and 369.6 GTexel/s, while the RX 6650M manages 154.6 GPixel/s and 270.6 GTexel/s. Pixel rate is nearly identical, but texture rate is 36.6% higher on the NVIDIA card.

Memory is another major divider. The RTX A4500 has 20 GB of GDDR6 on a 320-bit bus, yielding 640.0 GB/s of bandwidth. The RX 6650M has 8 GB of GDDR6 on a 128-bit bus, yielding 224.0 GB/s. That is a 2.5x memory capacity lead and a 2.86x bandwidth lead for the NVIDIA card. The RX 6650M’s memory clock is 1750 MHz (14 Gbps effective) versus 2000 MHz (16 Gbps effective) on the RTX A4500, but the bus width difference is the dominant factor.

Clock speeds tell the opposite story. The RX 6650M’s base clock is 2068 MHz and boost is 2416 MHz, with a game clock of 2222 MHz. The RTX A4500 runs at 1050 MHz base and 1650 MHz boost. AMD’s mobile chip is clocked 96.9% higher at base and 46.4% higher at boost, but the NVIDIA card’s massive core count and memory subsystem overwhelm that clock advantage. The FP16 ratio also differs: the RTX A4500 does 23.65 TFLOPS FP16 at a 1:1 ratio with FP32, while the RX 6650M does 17.32 TFLOPS FP16 at a 2:1 ratio. This means the AMD card is faster at FP16 relative to its own FP32, but still slower in absolute terms.

Power and physical design diverge completely. The RTX A4500 is a dual-slot desktop card rated at 200 W TDP, requiring a single 8-pin power connector and a 550 W suggested PSU. It measures 267 mm long and 112 mm high. The RX 6650M is an IGP (integrated graphics processor) for laptops, rated at 120 W TDP, with no power connectors and no listed dimensions. The RX 6650M is also a mobile part with display outputs described as “portable device dependent,” while the RTX A4500 offers 4x DisplayPort 1.4a outputs. Both support PCIe 4.0, but the RTX A4500 uses x16 while the RX 6650M uses x8.

The Verdict

The data is unambiguous: the NVIDIA RTX A4500 is the superior performer in every measured benchmark. It wins both head-to-head tests, has a higher average score (91,671 vs 71,768), and sits at a higher percentile (93rd vs 91st). For any workload that stresses raw compute, memory bandwidth, or texture throughput, the RTX A4500 is the clear choice. Its 20 GB VRAM and 640.0 GB/s bandwidth are in a different class from the RX 6650M’s 8 GB and 224.0 GB/s. The 115.6% lead in OpenCL and 67.2% lead in Vulkan are not close margins; they represent fundamental performance tiers.

However, the RX 6650M is not without merit. It is a mobile chip with a 120 W TDP, meaning it fits in laptops and requires no external power connectors. The RTX A4500 is a 200 W desktop card that needs a 550 W PSU and occupies a dual-slot form factor. If portability is a hard requirement, the RX 6650M is the only option of the two — the RTX A4500 physically cannot be installed in a laptop. The RX 6650M’s higher clocks (2416 MHz boost vs 1650 MHz) also suggest it can be efficient in short bursts, even if sustained compute is far below the NVIDIA part.

Who should pick which? A professional doing 3D rendering, AI inference, or large dataset visualization on a desktop workstation should choose the RTX A4500 without hesitation. The 20 GB VRAM alone is a decisive factor for models or scenes that exceed 8 GB. A mobile user who needs a capable GPU for gaming or light compute on the go should consider the RX 6650M, accepting that it will be roughly 27.8% slower on average and significantly slower in OpenCL workloads. The RTX A4500 is end-of-life, as is the RX 6650M, so neither is a future-proof purchase, but the NVIDIA card’s performance headroom is far larger.

FAQ

Q: Which GPU wins in Geekbench OpenCL?

A: The NVIDIA RTX A4500 wins with a score of 141,837 versus the AMD RX 6650M’s 65,800, a 115.6% advantage.

Q: How much faster is the RTX A4500 in Geekbench Vulkan?

A: The RTX A4500 scores 129,980, while the RX 6650M scores 77,735, making the NVIDIA card 67.2% faster.

Q: What is the memory capacity difference?

A: The RTX A4500 has 20 GB of GDDR6 on a 320-bit bus, while the RX 6650M has 8 GB of GDDR6 on a 128-bit bus.

Q: Which GPU has higher boost clock?

A: The AMD RX 6650M has a boost clock of 2416 MHz, compared to the RTX A4500’s 1650 MHz.

Q: Are both GPUs end-of-life?

A: Yes, the production status for both the RTX A4500 and the RX 6650M is listed as end-of-life.

Q: What is the TDP difference?

A: The RTX A4500 is rated at 200 W, while the RX 6650M is rated at 120 W.

Where Each One Wins

The NVIDIA RTX A4500 wins in every performance category measured. It is ahead in OpenCL, Vulkan, average benchmark score, and percentile ranking. Its 23.65 TFLOPS FP32 performance is 2.73x the RX 6650M’s 8.659 TFLOPS. The texture rate of 369.6 GTexel/s versus 270.6 GTexel/s is a 36.6% lead, which matters for workloads that sample many textures, such as photogrammetry or complex shaders. The 640.0 GB/s memory bandwidth is 2.86x the RX 6650M’s 224.0 GB/s, making the RTX A4500 far better for memory-bound tasks like large matrix operations or high-resolution rendering. It also has 4x the shading units (7,168 vs 1,792) and 2x the RT cores (56 vs 28), giving it a massive edge in ray-traced workloads.

The AMD RX 6650M wins in efficiency per watt and physical footprint. At 120 W TDP, it draws 40% less power than the RTX A4500’s 200 W. It is an IGP, meaning it can be integrated into laptops, whereas the RTX A4500 is a dual-slot desktop card. The RX 6650M also has a higher base clock (2068 MHz vs 1050 MHz) and boost clock (2416 MHz vs 1650 MHz), which can translate to snappier response in short, lightly threaded tasks. Its FP16 performance of 17.32 TFLOPS is 2x its FP32 rate, whereas the RTX A4500’s FP16 is 1:1 with FP32; for workloads that can use FP16, the RX 6650M’s relative advantage is larger, though still lower in absolute terms.

Specification Differences

The two GPUs differ in nearly every specification. The RTX A4500 uses the GA102 chip on an 8 nm Samsung process with 28,300 million transistors on a 628 mm² die. The RX 6650M uses the Navi 23 chip on a 7 nm TSMC process with 11,060 million transistors on a 237 mm² die. Transistor density is similar (45.1M vs 46.7M per mm²), but the die size difference is 2.65x. The RTX A4500 has 7,168 shading units, 224 TMUs, 96 ROPs, 56 RT cores, and 224 tensor cores. The RX 6650M has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor cores. Memory differs by capacity (20 GB vs 8 GB), bus width (320-bit vs 128-bit), and bandwidth (640.0 GB/s vs 224.0 GB/s). Clocks are reversed, with the RX 6650M running at 2068 MHz base and 2416 MHz boost versus the RTX A4500’s 1050 MHz base and 1650 MHz boost. FP32 throughput is 23.65 TFLOPS versus 8.659 TFLOPS, and FP16 is 23.65 TFLOPS (1:1) versus 17.32 TFLOPS (2:1). TDP is 200 W versus 120 W, and the form factor is dual-slot versus IGP. The RTX A4500 uses a PCIe 4.0 x16 interface and 4x DisplayPort 1.4a outputs, while the RX 6650M uses PCIe 4.0 x8 and portable-device-dependent outputs. The RTX A4500 also requires a 550 W PSU and one 8-pin connector, while the RX 6650M has no power connectors. Release dates differ by about six weeks, with the RTX A4500 launching on 2021-11-22 and the RX 6650M on 2022-01-03. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.