AMD Radeon RX 6800M vs NVIDIA GeForce RTX 3080 Ti Mobile Comparison

Where Each One Wins

The recorded benchmark data draws a remarkably clear dividing line between these two mobile GPUs. Across every single test in the database, the NVIDIA GeForce RTX 3080 Ti Mobile posts the higher score. The AMD Radeon RX 6800M does not record a single win in the ten head-to-head comparisons. This is not a close contest with split victories; it is a consistent sweep for the NVIDIA part.

The AMD RX 6800M finds its closest relative performance in the Vulkan API test, where it trails by 11.8%. That gap widens considerably in compute-oriented workloads. The PassMark GPU Compute test shows the largest deficit at 40.6%. The pattern suggests the NVIDIA part pulls further ahead as workloads become more parallel or memory-bandwidth intensive. The DirectX 9, 10, 11, and 12 tests all show deficits between 22.6% and 26.9%, indicating a fairly uniform advantage across legacy and modern rasterization APIs.

For users prioritizing raw graphics performance, the RTX 3080 Ti Mobile is the clear choice in every measured scenario. The RX 6800M remains competitive in the sense that it posts respectable absolute scores, but the data does not identify any workload category where it takes the lead.

FAQ

Q: Which GPU wins more benchmark tests?

A: The NVIDIA GeForce RTX 3080 Ti Mobile wins all 10 recorded head-to-head benchmarks against the AMD Radeon RX 6800M.

Q: What is the smallest performance gap between the two?

A: The smallest gap is in the Geekbench Vulkan test, where the RTX 3080 Ti Mobile scores 107502 against the RX 6800M's 94766, a difference of 11.8%.

Q: What is the largest performance gap?

A: The largest gap appears in the PassMark GPU Compute test. The RTX 3080 Ti Mobile scores 8471, while the RX 6800M scores 5032, a 40.6% difference.

Q: How do their average benchmark scores compare?

A: The RX 6800M has an average benchmark score of 28874, while the RTX 3080 Ti Mobile averages 25740. Despite losing every head-to-head test, the AMD part has a higher average because its benchmark set includes the Geekbench Metal score of 113721, which the NVIDIA part does not have recorded.

Q: Which GPU has the higher percentile ranking among all GPUs?

A: The RX 6800M sits at the 74th percentile, while the RTX 3080 Ti Mobile sits at the 71st percentile.

Q: In which API test does the RTX 3080 Ti Mobile show its smallest advantage?

A: Besides Vulkan at 11.8%, the DirectX 10 test shows a 22.9% gap, which is the next smallest margin.

Head-to-Head Benchmarks

The 3DMark Steel Nomad DX12 test opens the comparison. The RTX 3080 Ti Mobile scores 2869 against the RX 6800M's 2238, a 22% difference. This is a modern DirectX 12 workload, and the NVIDIA part leads by nearly a quarter.

The Geekbench suite provides mixed results. In OpenCL, the RTX 3080 Ti Mobile scores 117866 versus 87621, a 25.7% gap. In Vulkan, the margin narrows to 107502 versus 94766, an 11.8% difference. The Vulkan result is the closest the AMD part comes to matching its rival anywhere in the database.

PassMark's legacy DirectX tests show consistent NVIDIA advantages. DirectX 9 scores 201 versus 147, a 26.9% lead. DirectX 10 scores 131 versus 101, a 22.9% lead. DirectX 11 scores 164 versus 127, a 22.6% lead. DirectX 12 scores 88 versus 65, a 26.1% lead. The consistency across four API generations suggests an architectural advantage rather than a workload-specific quirk.

The PassMark 2D test shows the widest relative gap after compute. The RTX 3080 Ti Mobile scores 818 in G2D, while the RX 6800M scores 538, a 34.2% difference. This is notable because 2D performance is not typically a differentiator for gaming GPUs, but the data shows a substantial lead.

The PassMark G3D test, a general 3D graphics benchmark, gives the RTX 3080 Ti Mobile a 19288 score versus 13261, a 31.2% lead. The GPU Compute test is the most lopsided: 8471 versus 5032, a 40.6% difference. This compute result aligns with the NVIDIA part's higher FP32 throughput of 18.71 TFLOPS compared to 12.24 TFLOPS.

Specification Differences

The two GPUs diverge significantly in their core configurations. The RTX 3080 Ti Mobile packs 7424 shading units, 232 texture mapping units, and 96 raster operation units. The RX 6800M has 2560 shading units, 160 TMUs, and 64 ROPs. The NVIDIA part also has 232 tensor cores and 58 ray tracing cores, while the AMD part lists 40 ray tracing cores and no tensor cores.

Memory configurations differ as well. The RTX 3080 Ti Mobile offers 16 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The RX 6800M has 12 GB of GDDR6 on a 192-bit bus, yielding 384.0 GB/s. Both run memory at 2000 MHz with 16 Gbps effective speed, but the wider bus gives the NVIDIA part a 33% bandwidth advantage.

Clock speeds tell a different story. The RX 6800M has a base clock of 2116 MHz and a boost clock of 2390 MHz, with a game clock of 2300 MHz. The RTX 3080 Ti Mobile has a base clock of 810 MHz and a boost clock of 1260 MHz. The AMD part runs at much higher frequencies, but the NVIDIA part compensates with more than double the shading units.

Rates reflect the tradeoff. The RX 6800M achieves a pixel rate of 153.0 GPixel/s and a texture rate of 382.4 GTexel/s. The RTX 3080 Ti Mobile achieves 121.0 GPixel/s and 292.3 GTexel/s despite its higher core count. The AMD part leads in fill rates, while the NVIDIA part leads in raw FP32 throughput.

Power draw is listed at 145 W for the RX 6800M and 115 W for the RTX 3080 Ti Mobile. The NVIDIA part delivers higher benchmark scores while drawing less power according to the recorded TDP figures. Both use PCIe 4.0 x16 interfaces and have no power connectors listed, indicating integrated laptop designs.

Architecture Differences

The RX 6800M is built on TSMC's 7 nm process with AMD's RDNA 2.0 architecture, using the Navi 22 chip. It contains 17,200 million transistors on a 335 mm² die, giving a transistor density of 51.3 million per mm². The RTX 3080 Ti Mobile uses Samsung's 8 nm process with NVIDIA's Ampere architecture, using the GA103 chip. It contains 22,000 million transistors on a 496 mm² die, giving a density of 44.4 million per mm².

The AMD part belongs to the Navi Mobile generation within the RX 6000M series. The NVIDIA part belongs to the GeForce 30 Mobile generation. The RX 6800M's predecessor is Polaris Mobile, while the RTX 3080 Ti Mobile's predecessor is GeForce 20 Mobile. Both are marked as end-of-life products.

The RDNA 2.0 architecture supports FP16 at a 2:1 ratio, delivering 24.47 TFLOPS, while FP32 runs at 12.24 TFLOPS. The Ampere architecture runs FP16 and FP32 at the same rate, both at 18.71 TFLOPS. This means the AMD part has a theoretical FP16 advantage when shader rate doubling is used, but the NVIDIA part has a higher baseline FP32 throughput.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 3080 Ti Mobile adds 232 tensor cores, which the RX 6800M lacks entirely. Ray tracing hardware differs as well: 58 RT cores versus 40. The NVIDIA part has a larger memory pool at 16 GB versus 12 GB, and a wider 256-bit bus versus 192-bit.

The RX 6800M was released in May 2021, while the RTX 3080 Ti Mobile came in January 2022. Neither part lists a launch MSRP in the database. Both use PCIe 4.0 x16 and have no discrete power connectors, consistent with mobile integration.

The Verdict

The data directs a straightforward conclusion. The NVIDIA GeForce RTX 3080 Ti Mobile wins every recorded benchmark, with margins ranging from 11.8% in Vulkan to 40.6% in compute. Users seeking maximum performance across DirectX, Vulkan, OpenCL, and compute workloads should choose the RTX 3080 Ti Mobile.

The AMD Radeon RX 6800M does offer a higher average benchmark score of 28874 versus 25740, but that figure is inflated by a Geekbench Metal score that has no NVIDIA counterpart. In every direct comparison, the AMD part trails. Its higher clock speeds and fill rates do not translate into benchmark victories.

Consider the RTX 3080 Ti Mobile for the following: users who run compute-heavy tasks, those who play games across multiple DirectX versions, and anyone who wants the highest recorded frame rates in the database. The 16 GB memory pool and 512.0 GB/s bandwidth provide headroom for large textures and data sets.

Consider the RX 6800M for the following: users who prefer AMD's RDNA 2.0 feature set, those who run workloads that leverage FP16 at 2:1 ratio, or anyone constrained by the lower 115 W TDP of the NVIDIA part. The RX 6800M draws 145 W, so the RTX 3080 Ti Mobile is actually the more power-efficient option per benchmark point.

The percentile rankings are close at 74 versus 71, but the head-to-head results are not. The RTX 3080 Ti Mobile is the superior mobile GPU according to the recorded measurements, with no caveats from the data. The RX 6800M is a capable part that sits near rivals like the Radeon RX 570 and RX 470, but it does not match the NVIDIA flagship mobile chip.