AMD Radeon RX 6650 XT vs NVIDIA GeForce RTX 3080 Mobile Comparison

Where Each One Wins

The benchmark split between these two cards is surprisingly even, with each winning exactly five of the ten recorded tests. However, the nature of those wins tells a clear story about what each GPU is optimized for.

The NVIDIA GeForce RTX 3080 Mobile dominates the modern, heavy-duty workloads. Its wins come in 3DMark Steel Nomad DX12, Geekbench OpenCL, Geekbench Vulkan, Passmark DirectX 10, and Passmark DirectX 12. These are the tests that stress raw shader throughput, ray tracing capabilities, and current-generation API efficiency. The most striking victory is in Geekbench OpenCL, where the RTX 3080 Mobile scores 104831 against just 10111 for the AMD Radeon RX 6650 XT, a delta of 936.8%. That is not a close contest; it is a generational gap in compute performance.

The AMD Radeon RX 6650 XT, meanwhile, takes the older API and rasterization-focused tests. It wins Passmark DirectX 11, DirectX 9, G2D, G3D, and GPU Compute. The G3D result is particularly relevant for general gaming: the AMD card scores 17166 versus 16321 for the NVIDIA part, a 4.9% lead. The DirectX 9 win is even larger at 20.9% (215 versus 170), and the G2D advantage is 30.6% (918 versus 637). These results suggest the RX 6650 XT retains an edge in legacy titles and in 2D-accelerated workloads.

In practical terms, the RTX 3080 Mobile is the card for modern, API-heavy applications and compute tasks. The RX 6650 XT is the card for established game engines and older DirectX titles. The data shows a clear dichotomy: if your workload leans toward DX12, Vulkan, or OpenCL compute, the NVIDIA part wins decisively. If you are running DX9, DX11, or need faster 2D operations, the AMD part is the better choice.

The Verdict

The overall average benchmark score favors the NVIDIA GeForce RTX 3080 Mobile. It averages 23628 across all tests, placing it in the 69th percentile of all GPUs in the database. The AMD Radeon RX 6650 XT averages 19765, placing it in the 65th percentile. That is a meaningful gap of roughly 19.6% in the aggregate, even though the head-to-head win count is tied at five apiece.

The nearest rivals for the RTX 3080 Mobile confirm its standing. It sits within 1% of the GeForce GTX TITAN Z (delta -0.5%), the GeForce RTX 3070 Ti Mobile (delta 0.5%), and the AMD Radeon RX 9070 (delta -1%). The RX 6650 XT, by contrast, sits alongside workstation and older prosumer cards like the Tesla K40m (delta -0.6%) and the FirePro W7000 (delta -0.7%). The company each card keeps in the rankings is telling.

For the user deciding between these two, the choice hinges on workload. Pick the RTX 3080 Mobile if you prioritize modern DirectX 12 and Vulkan titles, OpenCL compute, or anything that leverages ray tracing cores. The 42.2% lead in 3DMark Steel Nomad DX12 is substantial, and the Vulkan advantage of 28% is equally significant. Pick the RX 6650 XT if your library is heavy with DirectX 9 and DirectX 11 games, or if you need faster 2D acceleration. The 30.6% G2D lead and the 20.9% DirectX 9 lead are not trivial.

The RTX 3080 Mobile is the stronger all-round card in modern workloads, but the RX 6650 XT is no slouch in legacy scenarios. The data does not support calling one an outright winner; it supports matching the card to the task.

Head-to-Head Benchmarks

The largest single delta in the entire comparison is the Geekbench OpenCL result. The RTX 3080 Mobile posts 104831, while the RX 6650 XT manages only 10111. That is a 936.8% difference, meaning the NVIDIA card delivers over ten times the compute throughput in this particular test. No other benchmark comes close to that margin.

In 3DMark Steel Nomad DX12, the RTX 3080 Mobile again wins decisively, scoring 2644 against 1859 for the AMD card. The 42.2% delta shows a clear advantage in modern DirectX 12 rendering, which is consistent with the NVIDIA card's higher FP32 throughput of 18.98 TFLOPS versus 10.79 TFLOPS for the AMD part.

Geekbench Vulkan also goes to NVIDIA, with 104066 versus 81306, a 28% lead. This is a broad compute and graphics test that benefits from the RTX 3080 Mobile's larger shading unit count of 6144 versus 2048. The NVIDIA card also wins Passmark DirectX 10 (120 versus 109, a 10.1% delta) and Passmark DirectX 12 (72 versus 62, a 16.1% delta).

The AMD card fights back in the older API suite. Passmark DirectX 11 goes to the RX 6650 XT at 169 versus 146, a 13.6% delta. Passmark DirectX 9 is an even bigger win: 215 versus 170, a 20.9% delta. The G2D test shows a 30.6% advantage for AMD (918 versus 637), which is notable for any 2D-heavy workflow or desktop compositing.

The two remaining tests are close. Passmark G3D favors the RX 6650 XT at 17166 versus 16321, a 4.9% delta. Passmark GPU Compute also favors AMD, at 7532 versus 7276, a 3.4% delta. These are the tightest margins in the comparison, suggesting that in raw rasterization and general compute, the two cards are nearly peers.

FAQ

Q: Which card wins more benchmarks in the head-to-head comparison?

A: The split is exactly even. The NVIDIA GeForce RTX 3080 Mobile wins 5 tests, and the AMD Radeon RX 6650 XT wins 5 tests.

Q: How big is the NVIDIA card's lead in modern DirectX 12 performance?

A: In 3DMark Steel Nomad DX12, the RTX 3080 Mobile scores 2644 versus 1859 for the RX 6650 XT, a 42.2% advantage.

Q: Where does the AMD card have its largest win?

A: The RX 6650 XT's biggest victory is in Passmark G2D, where it scores 918 against 637 for the NVIDIA card, a 30.6% delta.

Q: What is the aggregate performance difference?

A: The RTX 3080 Mobile has an average benchmark score of 23628, while the RX 6650 XT averages 19765. The NVIDIA card sits in the 69th percentile of all GPUs, the AMD card in the 65th.

Q: Which card has better OpenCL compute performance?

A: The RTX 3080 Mobile is overwhelmingly ahead, scoring 104831 in Geekbench OpenCL versus 10111 for the RX 6650 XT, a 936.8% delta.

Q: Are the cards close in any test?

A: Yes, in Passmark G3D the RX 6650 XT leads by only 4.9% (17166 versus 16321), and in Passmark GPU Compute it leads by just 3.4% (7532 versus 7276).

Architecture Differences

The two GPUs come from different foundries and process nodes. The NVIDIA GeForce RTX 3080 Mobile uses an 8 nm node from Samsung, packing 17,400 million transistors onto a 392 mm² die. The AMD Radeon RX 6650 XT uses a 7 nm node from TSMC, with 11,060 million transistors on a 237 mm² die. The transistor density is close, 44.4M per mm² for NVIDIA and 46.7M per mm² for AMD, but the NVIDIA chip is physically much larger and has more raw silicon.

The architecture names reflect different design philosophies. NVIDIA uses Ampere, with a GA104 chip, while AMD uses RDNA 2.0, with a Navi 23 chip. The NVIDIA card integrates 48 ray tracing cores and 192 tensor cores, while the AMD card has 32 ray tracing cores and no tensor cores at all. Tensor cores are NVIDIA-specific hardware for AI and deep learning workloads, which explains the massive OpenCL compute advantage.

Shader configuration differs dramatically. The RTX 3080 Mobile has 6144 shading units, 192 TMUs, and 96 ROPs. The RX 6650 XT has 2048 shading units, 128 TMUs, and 64 ROPs. Despite having one-third the shading units, the AMD card achieves a higher pixel rate (168.6 GPixel/s versus 148.3 GPixel/s) and a higher texture rate (337.3 GTexel/s versus 296.6 GTexel/s) thanks to its much higher clock speeds.

FP32 throughput tells the compute story: the NVIDIA card delivers 18.98 TFLOPS, while the AMD card delivers 10.79 TFLOPS. However, the AMD card's FP16 rate is 21.59 TFLOPS (2:1 ratio), while the NVIDIA card's FP16 rate is 18.98 TFLOPS (1:1 ratio). This means the AMD card is faster at half-precision math, which can matter in certain AI or rendering workloads.

The memory subsystem also differs. Both have 8 GB of GDDR6, but the NVIDIA card uses a 256-bit bus for 448.0 GB/s bandwidth, while the AMD card uses a 128-bit bus for 280.3 GB/s. The AMD card compensates with faster effective memory speed (17.5 Gbps versus 14 Gbps), but the wider NVIDIA bus wins on total bandwidth.

Specification Differences

The most obvious difference is power and form factor. The RTX 3080 Mobile is a mobile GPU with a TDP of 115 W, no power connectors (it relies on the laptop's internal power delivery), and portable-device-dependent display outputs. The RX 6650 XT is a desktop card with a 176 W TDP, a dual-slot cooler, a single 8-pin power connector, a recommended 450 W PSU, and fixed display outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a.

Clock speeds are starkly different. The RTX 3080 Mobile has a base clock of 1110 MHz and a boost of 1545 MHz. The RX 6650 XT has a base clock of 2055 MHz, a game clock of 2410 MHz, and a boost of 2635 MHz. The AMD card runs nearly 70% faster at base clock, which explains how it keeps pace in rasterization despite having far fewer shaders.

Memory configuration is another key split. Both use 8 GB of GDDR6, but the NVIDIA card uses a 256-bit bus with 448.0 GB/s bandwidth, while the AMD card uses a 128-bit bus with 280.3 GB/s bandwidth. The NVIDIA card's memory runs at 1750 MHz (14 Gbps effective), while the AMD card runs at 2190 MHz (17.5 Gbps effective).

The PCIe interface differs as well. The RTX 3080 Mobile uses PCIe 4.0 x16, while the RX 6650 XT uses PCIe 4.0 x8. The NVIDIA card has full x16 bandwidth, which can matter for data-heavy workloads, but the AMD card's x8 link is generally sufficient for gaming.

Production status and release timing also differ. The RTX 3080 Mobile was released on 2021-01-11 and is now end-of-life. The RX 6650 XT was released on 2022-05-09 and is also end-of-life. The NVIDIA card's predecessor is the GeForce 20 Mobile series, while the AMD card's predecessor is Navi and its successor is Navi III. The AMD card has a launch MSRP of 399 USD, which is the only pricing data available for either card.