AMD Radeon RX 6650M XT vs NVIDIA GeForce RTX 4080 SUPER Comparison

Head-to-Head Benchmarks

The database contains a single direct comparison between the AMD Radeon RX 6650M XT and the NVIDIA GeForce RTX 4080 SUPER, using Geekbench OpenCL. The results are unambiguous: the RTX 4080 SUPER scores 219,065 points, while the RX 665M XT manages 76,904 points. That puts the NVIDIA card 64.9% ahead in this test, a commanding margin that reflects the fundamental performance separation between these two products.

Looking at the broader benchmark context, the RTX 4080 SUPER also has a substantial body of additional results recorded in the database. Its PassMark G3D score of 34,245 and PassMark GPU Compute score of 19,822 reinforce the picture of a high-performance part. The RX 6650M XT, by contrast, has only the Geekbench OpenCL result on file, which limits direct cross-referencing but does not change the outcome of the head-to-head.

The delta of -64.9% for the AMD part in the only shared test is not a close contest by any measure. It is importantly the RTX 4080 SUPER's nearest rivals in the database include the RTX 4080 at -0.1%, the AMD Radeon Pro W5700X at -1.1%, and the AMD Radeon RX 6750 GRE 12 GB at -2.7%. Those are narrow deltas, meaning the 4080 SUPER sits in a tightly packed performance tier. The RX 6650M XT's nearest rivals, meanwhile, include the RTX 5090 D at -1%, the RX 6850M XT at -2.6%, and Tesla P100 variants at around -3%. That tells a different story: the 6650M XT is near the top of its own performance tier, but that tier is far below the one occupied by the 4080 SUPER.

In absolute terms, the RTX 4080 SUPER delivers nearly three times the OpenCL score of the RX 6650M XT. The distance between them is so large that no other benchmark result would plausibly close the gap. The data shows a clear hierarchy, with the NVIDIA part occupying a different performance class entirely.

Where Each One Wins

The RTX 4080 SUPER wins the only direct comparison, but its advantage extends across multiple workload types when considering its full benchmark suite. In Geekbench OpenCL, it posts 219,065, which is the reference point for the head-to-head. Its Vulkan score of 260,075 from Geekbench is even higher, suggesting strong performance in graphics APIs that are common in modern games and compute workloads. PassMark results also show breadth: DirectX 9 at 381, DirectX 11 at 301, DirectX 10 at 193, and DirectX 12 at 134. The G2D score of 1,270 and G3D score of 34,245 round out a comprehensive profile.

The RX 6650M XT, with only its OpenCL score of 76,904, cannot claim wins in any recorded category outside that single test. However, its percentile ranking tells a useful story: it sits at the 91st percentile of all GPUs in the database, while the RTX 4080 SUPER sits at the 86th percentile. That inversion is notable. The 6650M XT is an end-of-life mobile part from the Radeon RX 6000 series, and its percentile reflects that it outperforms a large majority of the database's tracked GPUs. The RTX 4080 SUPER, despite being far faster in raw scores, is ranked in a lower percentile because it competes against a much stronger field of high-end parts.

For use-case splitting, the data suggests the RTX 4080 SUPER is the choice for any workload that stresses raw compute throughput, particularly OpenCL and Vulkan. Its memory configuration also matters: 16 GB of GDDR6X on a 256-bit bus delivers 736.3 GB/s of bandwidth, versus 8 GB of GDDR6 on a 128-bit bus at 256.0 GB/s for the AMD part. That 2.9x bandwidth advantage aligns with the 2.8x score advantage in OpenCL. The RX 6650M XT, on the other hand, is a mobile IGP with no power connectors and a 120 W TDP, so its wins are implicitly in efficiency and form factor rather than raw performance. The database does not record a single benchmark where the AMD part wins outright, so any use-case advantage for it must be inferred from its physical and electrical characteristics, not from measured scores.

The Verdict

The verdict is straightforward from the recorded data: the NVIDIA GeForce RTX 4080 SUPER is the superior performer in every measurable way. In the only shared benchmark, it leads by 64.9%, and its additional scores in Vulkan, PassMark DirectX variants, and compute all point to a part that is designed for high-end desktop workloads. The RX 6650M XT is not competitive in this comparison, and no data suggests otherwise.

Who should pick the RTX 4080 SUPER? Anyone whose priority is maximum compute and graphics performance in a desktop context. The card's triple-slot design, 1x 16-pin power connector, and 700 W suggested PSU indicate it is meant for a full-sized tower with serious power delivery. Its 16 GB memory and 736.3 GB/s bandwidth make it suitable for large datasets, high-resolution textures, and compute tasks that exceed the 8 GB capacity of the AMD part. The launch MSRP is 999 USD, which places it in the upper tier of consumer GPUs.

Who should pick the RX 6650M XT? The data does not support choosing it for performance, but its profile fits a different niche. It is an IGP with no power connectors, a 120 W TDP, and a 7 nm process from TSMC. It is end-of-life and was released in January 2022, so it is not a current product. Its 91st percentile ranking shows it is a capable part relative to the database's full GPU population, but the RTX 4080 SUPER's 86th percentile is misleading in that context because it is surrounded by even faster rivals. For a user who needs a mobile or compact solution with modest power draw, the 6650M XT has a role; for anyone comparing raw performance, the RTX 4080 SUPER wins without qualification.

FAQ

Q: Which GPU has the higher Geekbench OpenCL score?

A: The NVIDIA GeForce RTX 4080 SUPER scores 219,065, while the AMD Radeon RX 665M XT scores 76,904. The RTX 4080 SUPER leads by 64.9%.

Q: Does the RX 6650M XT win any recorded benchmark against the RTX 4080 SUPER?

A: No. The database records one head-to-head test, Geekbench OpenCL, and the RTX 4080 SUPER wins it. The RX 6650M XT has zero wins in direct comparison.

Q: How do the memory specs compare?

A: The RTX 4080 SUPER has 16 GB of GDDR6X on a 256-bit bus with 736.3 GB/s bandwidth. The RX 6650M XT has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Q: What are the percentile rankings for each GPU?

A: The RX 6650M XT is at the 91st percentile of all GPUs in the database. The RTX 4080 SUPER is at the 86th percentile.

Q: What power connectors does each GPU require?

A: The RTX 4080 SUPER uses a 1x 16-pin connector and has a 320 W TDP. The RX 6650M XT has no power connectors and a 120 W TDP.

Q: How close are the RTX 4080 SUPER's nearest rivals?

A: Its nearest rivals are the RTX 4080 at -0.1%, the AMD Radeon Pro W5700X at -1.1%, and the AMD Radeon RX 6750 GRE 12 GB at -2.7%.

Architecture Differences

The two GPUs come from fundamentally different design generations. The AMD Radeon RX 6650M XT uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated on TSMC's 7 nm process. The NVIDIA GeForce RTX 4080 SUPER uses the AD103 chip with Ada Lovelace architecture, fabricated on TSMC's 5 nm process. That process difference contributes to a large transistor density gap: the AMD chip packs 11,060 million transistors into a 237 mm² die, for a density of 46.7M per mm², while the NVIDIA chip fits 45,900 million transistors into 379 mm², for 121.1M per mm².

The core configurations diverge sharply. The RX 6650M XT has 2,048 shading units, 128 texture mapping units, and 64 render output units. The RTX 4080 SUPER has 10,240 shading units, 320 TMUs, and 112 ROPs. Ray tracing hardware also differs: 32 RT cores on the AMD side versus 80 on the NVIDIA side. The RTX 4080 SUPER additionally includes 320 tensor cores, a feature that the RX 6650M XT lacks entirely. These structural differences translate directly into throughput: the AMD card delivers 9.896 TFLOPS of FP32 performance and 19.79 TFLOPS of FP16 (2:1 ratio), while the NVIDIA card delivers 52.22 TFLOPS for both FP32 and FP16 (1:1 ratio).

Clock behavior also differs. The RX 6650M XT has a base clock of 2068 MHz, a boost of 2416 MHz, and a game clock of 2162 MHz. The RTX 4080 SUPER has a base of 2295 MHz and a boost of 2550 MHz, with no game clock listed. Pixel and texture rates follow the core counts: the AMD part achieves 154.6 GPixel/s and 309.2 GTexel/s, while the NVIDIA part reaches 285.6 GPixel/s and 816.0 GTexel/s.

Memory architecture is another major split. The RX 6650M XT uses 8 GB of GDDR6 at 16 Gbps effective, on a 128-bit bus, yielding 256.0 GB/s. The RTX 4080 SUPER uses 16 GB of GDDR6X at 23 Gbps effective, on a 256-bit bus, yielding 736.3 GB/s. The bus interface also differs: PCIe 4.0 x8 for the AMD part versus PCIe 4.0 x16 for the NVIDIA part. Physical design is starkly different as well: the RX 6650M XT is an IGP with no slot width or power connectors, while the RTX 4080 SUPER is a triple-slot card measuring 310 mm long, 140 mm tall, and 61 mm wide, with a 1x 16-pin power connector and a 700 W suggested PSU.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 4080 SUPER's display outputs are specified as 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the RX 6650M XT's outputs are listed as portable device dependent. The production status for both is end-of-life, with the RX 6650M XT released in January 2022 and the RTX 4080 SUPER in January 2024. The AMD part's predecessor is Polaris Mobile, and the NVIDIA part's predecessor is GeForce 30, with its successor listed as GeForce 50.