AMD Radeon RX 6650M XT vs NVIDIA RTX A3000 Mobile Comparison

AMD Radeon RX 6650M XT and NVIDIA RTX A3000 Mobile are both end-of-life mobile GPUs aimed at different priorities, and the benchmark data shows a closer contest than their architectural differences might suggest. The only direct head-to-head result available is the Geekbench OpenCL test, where the NVIDIA RTX A3000 Mobile scores 79,091 against the AMD Radeon RX 6650M XT's 76,904, a margin of 2.8%. Both cards sit at the 91st percentile among all GPUs, meaning they are effectively peers in overall standing, but the way they achieve that standing diverges sharply in raw compute, memory configuration, and power draw.

Head-to-Head Benchmarks

The single available comparison point is Geekbench OpenCL, and it favors the NVIDIA part. The RTX A3000 Mobile posts 79,091 points, while the RX 6650M XT trails at 76,904, a 2.8% deficit. This is a narrow win, but it is consistent with the FP32 compute ratings: NVIDIA's card is rated for 10.08 TFLOPS, versus 9.896 TFLOPS for AMD, a difference of about 1.9% that the benchmark roughly mirrors. In practical terms, a 2.8% gap in a synthetic OpenCL workload is within run-to-run variance for many mobile systems, but the data shows NVIDIA ahead.

Look at the nearest rivals for context. The RTX A3000 Mobile's average benchmark score across all tests is 70,140, which is dragged down by its Vulkan result of 61,189; the OpenCL score of 79,091 is its best showing. Its nearest rival, the NVIDIA Quadro P6000, scores 69,986, meaning the RTX A3000 Mobile is 0.2% ahead of that card. Meanwhile, the RX 6650M XT's single OpenCL score of 76,904 is also its average, and it sits 1% behind the NVIDIA GeForce RTX 5090 D (77,712) and 2.6% behind the AMD Radeon RX 6850M XT (78,940). The data suggests both cards perform at a similar tier, but the NVIDIA card edges ahead in the one test where they are directly compared.

The texture and pixel rates tell a different story. The RX 6650M XT achieves 309.2 GTexel/s and 154.6 GPixel/s, while the RTX A3000 Mobile manages only 157.4 GTexel/s and 78.72 GPixel/s. That means AMD's card has exactly double the texture fill rate and double the pixel fill rate of the NVIDIA part. For workloads that are fill-rate bound, such as certain rasterization-heavy scenes or compute kernels that hammer texture units, the RX 6650M XT has a clear theoretical advantage that the OpenCL score does not capture. However, no direct benchmark for those workloads exists in the data, so this remains an inference from specifications.

FAQ

Q: Which GPU has the higher raw compute throughput in FP32?

A: The NVIDIA RTX A3000 Mobile is rated at 10.08 TFLOPS FP32, slightly ahead of the AMD Radeon RX 6650M XT's 9.896 TFLOPS. This aligns with the RTX A3000 Mobile's 2.8% win in the Geekbench OpenCL test.

Q: How do the memory configurations compare?

A: The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus, yielding 256.0 GB/s of bandwidth. The RTX A3000 Mobile has 6 GB of GDDR6 on a 192-bit bus, yielding 264.0 GB/s of bandwidth. Despite having less capacity, the NVIDIA card offers slightly higher bandwidth.

Q: What is the power draw difference?

A: The AMD Radeon RX 6650M XT has a TDP of 120 W, while the NVIDIA RTX A3000 Mobile is rated at 70 W. The NVIDIA part draws 50 W less, which is significant for thin-and-light laptops or battery-constrained systems.

Q: Do both GPUs support the same modern APIs?

A: Yes. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This means feature-level compatibility for modern games and compute workloads is identical, with no API advantage for either side.

Q: Which card has more shading units?

A: The RTX A3000 Mobile has 4,096 shading units, which is double the RX 6650M XT's 2,048 units. However, the NVIDIA card's lower boost clock of 1230 MHz versus 2416 MHz on the AMD card means the extra units do not translate into a proportional FP32 advantage.

Q: What is the RTX A3000 Mobile's Vulkan performance?

A: It scores 61,189 in Geekbench Vulkan, which is notably lower than its OpenCL score of 79,091. This suggests the card is better optimized for OpenCL workloads, though no Vulkan result is available for the RX 6650M XT to make a direct comparison.

The Verdict

The data points to a clear split: the NVIDIA RTX A3000 Mobile wins the only direct benchmark and does so on lower power, but the AMD Radeon RX 6650M XT offers superior fill rates and more memory capacity. For users who prioritize raw OpenCL compute performance and power efficiency, the RTX A3000 Mobile is the better choice based on the 2.8% benchmark lead and its 70 W TDP. For users who need more VRAM for large datasets or who run workloads that are sensitive to texture and pixel throughput, the RX 6650M XT's 8 GB capacity and double fill rates make it the more compelling option, despite losing the synthetic test. Both cards are at the 91st percentile, so neither is a weak performer; the decision hinges on workload type and system power constraints.

Specification Differences

The two GPUs differ in nearly every core specification. The RX 6650M XT uses a 7 nm process from TSMC, while the RTX A3000 Mobile uses an 8 nm process from Samsung. The AMD chip, Navi 23, has 11,060 million transistors on a 237 mm² die, whereas the NVIDIA chip, GA104, has 17,400 million transistors on a 392 mm² die. Transistor density is similar at 46.7M per mm² for AMD and 44.4M per mm² for NVIDIA.

Clock speeds diverge wildly: the RX 6650M XT has a base clock of 2068 MHz and a boost of 2416 MHz, while the RTX A3000 Mobile has a base of just 600 MHz and a boost of 1230 MHz. The AMD card has 128 TMUs and 64 ROPs, matching the NVIDIA card's counts exactly, but the NVIDIA card has 4,096 shading units versus 2,048, and 128 tensor cores versus none on the AMD side. Both have 32 ray tracing cores. Memory differs: 8 GB GDDR6 at 2000 MHz (16 Gbps effective) on a 128-bit bus for AMD, versus 6 GB GDDR6 at 1375 MHz (11 Gbps effective) on a 192-bit bus for NVIDIA. The RX 6650M XT draws 120 W, the RTX A3000 Mobile 70 W. The AMD card uses a PCIe 4.0 x8 interface, while the NVIDIA card uses PCIe 4.0 x16.

Architecture Differences

The architectural split is fundamental. AMD's RDNA 2.0 architecture on the RX 6650M XT is built on a 7 nm TSMC process, delivering high clock speeds of up to 2416 MHz. The NVIDIA RTX A3000 Mobile uses the Ampere architecture on an 8 nm Samsung process, with a much lower boost clock of 1230 MHz. AMD's card has no tensor cores, while the NVIDIA card includes 128, which are available for AI-accelerated workloads if the software supports them. Both cards have 32 ray tracing cores, so ray tracing hardware is present on both, but the underlying compute architecture differs: AMD uses a 2:1 FP16 ratio (19.79 TFLOPS), while NVIDIA uses 1:1 FP16 (10.08 TFLOPS). This means the RX 6650M XT can double its throughput on FP16 workloads, a feature that could benefit certain compute tasks. The NVIDIA card has a larger die and more transistors but runs at lower clocks, resulting in slightly higher FP32 throughput and significantly lower power consumption.

Where Each One Wins

The AMD Radeon RX 6650M XT wins in scenarios that favor its higher clock speeds and fill rates. With 309.2 GTexel/s and 154.6 GPixel/s, it is theoretically twice as fast as the RTX A3000 Mobile in texture-heavy and pixel-heavy workloads. Its 8 GB VRAM capacity is also an advantage for applications that need more memory than the 6 GB offered by the NVIDIA card. The RX 6650M XT is the better pick for users who run fill-rate-bound compute or who need the extra 2 GB of VRAM for larger textures or datasets. Its 2:1 FP16 ratio also means it can deliver 19.79 TFLOPS in half-precision workloads, which is nearly double the NVIDIA card's 10.08 TFLOPS.

The NVIDIA RTX A3000 Mobile wins in the only direct benchmark, the Geekbench OpenCL test, with a 2.8% lead. It also offers 128 tensor cores, which the AMD card lacks, making it the only option for Tensor Core-accelerated applications. Its 70 W TDP is a major advantage for mobile systems, allowing for thinner laptops with less cooling overhead and longer battery life. The higher bandwidth of 264.0 GB/s, despite the smaller bus, is a minor edge for memory-throughput-sensitive tasks. The RTX A3000 Mobile is the right choice for users who prioritize OpenCL performance, power efficiency, or Tensor Core support, and who are willing to accept less VRAM and lower fill rates. The data does not include a Vulkan score for the AMD card, so any Vulkan comparison is incomplete, but the NVIDIA card's Vulkan score of 61,189 is notably lower than its OpenCL result, suggesting performance varies by API.