AMD Radeon RX 6650M vs AMD Radeon RX 6850M XT Comparison

AMD Radeon RX 6850M XT vs AMD Radeon RX 6650M

The data places these two RDNA 2.0 mobile GPUs in adjacent performance tiers, with the RX 6850M XT clearly ahead in every paired benchmark. The RX 6850M XT posts an average benchmark score of 78,940, which ranks it in the 92nd percentile of all GPUs; the RX 6650M averages 71,768, sitting just one percentile lower at 91. That slim percentile gap belies a significant raw performance delta: in the two head-to-head tests available, the larger Navi 22 part wins both by roughly 28-29%. This is a classic "bigger chip vs. smaller chip" matchup within the same generation, where the 6850M XT uses its additional silicon and memory bandwidth to pull away, while the 6650M remains a more power-efficient and compact alternative.

Head-to-Head Benchmarks

The head-to-head results are unambiguous, with the RX 6850M XT taking both recorded tests. In Geekbench OpenCL, the 6850M XT scores 85,040 against the 6650M's 65,800, a delta of 29.2% in favor of the larger GPU. That is a substantial margin—enough to feel in any compute-heavy workload, from rendering to GPGPU tasks. The Vulkan result tells a similar story: 99,483 for the 6850M XT versus 77,735 for the 6650M, a 28% advantage. Vulkan is often used as a proxy for gaming performance in modern titles, so this gap suggests the 6850M XT will deliver a meaningfully higher frame rate in DX12/Vulkan-based games, assuming the rest of the system can feed it.

Looking at the broader benchmark context, the 6850M XT's average score of 78,940 places it within 0.6% of a NVIDIA Tesla P100 PCIe 12 GB (79,396) and 0.8% of the 16 GB variant (79,605). It actually edges out the GeForce RTX 5090 D (77,712) by 1.6%, though it trails the standard RTX 5090 (79,842) by 1.1%. For the 6650M, its 71,768 average is nearly identical to a NVIDIA TITAN X Pascal (72,098, -0.5%) and an AMD Radeon Pro Vega 64 (72,379, -0.8%), while it beats an AMD Radeon RX 6600 LE (70,829) by 1.3%. The takeaway: the 6850M XT competes with last-generation desktop workstation flagships, while the 6650M lands in the upper-midrange desktop tier. The 6850M XT's single extra benchmark (3DMark Steel Nomad DX12 at 2,257 and Geekbench Metal at 128,981) further underscores its broader capability, though those tests have no direct 6650M counterpart.

FAQ

Q: Which GPU is faster in raw compute performance?

A: The RX 6850M XT is faster in both head-to-head tests. It leads by 29.2% in Geekbench OpenCL (85,040 vs. 65,800) and by 28% in Geekbench Vulkan (99,483 vs. 77,735). Its FP32 throughput is 13.21 TFLOPS versus 8.659 TFLOPS for the 6650M.

Q: How do these GPUs compare to desktop rivals?

A: The 6850M XT's average score (78,940) is within 1.1% of the NVIDIA GeForce RTX 5090 and 1.6% ahead of the RTX 5090 D. The 6650M (71,768) trades blows with the NVIDIA TITAN X Pascal (72,098) and AMD Radeon Pro Vega 64 (72,379), while beating the Radeon RX 6600 LE by 1.3%.

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. They also share the same RDNA 2.0 architecture and 7 nm TSMC process node, so feature-level support is identical.

Q: What is the memory configuration difference?

A: The 6850M XT has 12 GB of GDDR6 on a 192-bit bus, yielding 432.0 GB/s bandwidth. The 6650M has 8 GB on a 128-bit bus, yielding 224.0 GB/s. That is a 208 GB/s difference—the 6850M XT offers 92.9% more memory bandwidth.

Q: Which card is more power-efficient?

A: The 6650M has a 120 W TDP versus 165 W for the 6850M XT. However, the 6850M XT delivers 29.2% higher OpenCL performance and 28% higher Vulkan performance while consuming only 37.5% more power, so the larger chip is more efficient per watt in these tests.

Q: Are these GPUs current products?

A: No. Both are end-of-life products from the Radeon RX 6000 series, released on the same date (2022-01-03). Their predecessor is Polaris Mobile, and neither has a listed successor in the data.

The Verdict

The RX 6850M XT is the clear choice for anyone prioritizing raw performance. It wins both head-to-head benchmarks by 28-29%, offers 50% more memory (12 GB vs. 8 GB), and delivers nearly double the memory bandwidth (432.0 GB/s vs. 224.0 GB/s). Its 92nd percentile ranking and average score of 78,940 put it in striking distance of desktop-class NVIDIA workstation and flagship gaming cards. The 6650M's only advantages are a lower TDP (120 W vs. 165 W) and a smaller die (237 mm² vs. 335 mm²), which could matter in thin-and-light chassis or battery-constrained designs. But for pure gaming and compute performance, the data strongly favors the 6850M XT—there is no benchmark where the 6650M wins. If you are choosing between these two for a laptop, the 6850M XT is the one to pick unless power draw is an absolute hard limit.

For the 6650M, the case is about efficiency and adequate performance. It still ranks in the 91st percentile of all GPUs and beats the desktop AMD Radeon RX 6600 LE by 1.3% and the NVIDIA TITAN X Pascal by 0.5%. Its 8 GB VRAM and 224 GB/s bandwidth are sufficient for 1080p gaming at high settings in most titles, though the 6850M XT's extra 4 GB and 208 GB/s of bandwidth provide more headroom for 1440p, texture-heavy mods, or future titles. The 6650M's 120 W TDP makes it a better fit for laptops where thermal and power budgets are tight, but you are giving up roughly 29% of performance in every measurable test.

Specification Differences

The two GPUs differ in nearly every core specification. The 6850M XT uses the Navi 22 chip with 17,200 million transistors on a 335 mm² die, while the 6650M uses Navi 23 with 11,060 million transistors on a 237 mm² die—a 35.5% smaller die and 35.7% fewer transistors. Transistor density is also higher on the 6850M XT at 51.3M / mm² versus 46.7M / mm². Clock speeds favor the larger chip: base 2321 MHz vs. 2068 MHz, boost 2581 MHz vs. 2416 MHz, and game clock 2463 MHz vs. 2222 MHz. Memory runs at 2250 MHz (18 Gbps effective) on the 6850M XT versus 1750 MHz (14 Gbps effective) on the 6650M.

Compute resources are substantially different. The 6850M XT has 2560 shading units, 160 TMUs, 64 ROPs, and 40 ray accelerators; the 6650M has 1792 shading units, 112 TMUs, 64 ROPs, and 28 ray accelerators. Pixel rate is close (165.2 GPixel/s vs. 154.6 GPixel/s), but texture rate diverges sharply (413.0 GTexel/s vs. 270.6 GTexel/s). FP32 compute is 13.21 TFLOPS vs. 8.659 TFLOPS, and FP16 is 26.43 TFLOPS vs. 17.32 TFLOPS (both at 2:1 ratio). Power draw is 165 W vs. 120 W. The bus interface also differs: PCIe 4.0 x16 on the 6850M XT versus PCIe 4.0 x8 on the 6650M.

Architecture Differences

Both GPUs share the same RDNA 2.0 architecture, 7 nm TSMC process, and Navi Mobile (RX 6000M) generation, so there are no fundamental architectural gaps—they are scaled versions of the same design. The 6850M XT's Navi 22 is a physically larger chip with 6,140 million more transistors, which allows for 768 additional shading units, 48 more TMUs, and 12 more ray accelerators. The ROP count is identical at 64, which explains why pixel rate is similar, but the texture rate gap (413.0 vs. 270.6 GTexel/s) reflects the 48-TMU difference. Memory architecture differs significantly: 192-bit bus on the 6850M XT vs. 128-bit on the 6650M, leading to the 432.0 GB/s vs. 224.0 GB/s bandwidth split. Both support the same API set (DirectX 12 Ultimate, OpenGL 4.6, Vulkan 1.4) and are IGP form factor with no power connectors, portable-device-dependent display outputs, and no suggested PSU.

Where Each One Wins

The RX 6850M XT wins in every performance category measured. It is the pick for high-refresh-rate 1080p and 1440p gaming, for 3D rendering, for compute workloads like OpenCL-based applications, and for any task that benefits from its 12 GB frame buffer and 432 GB/s bandwidth. Its 3DMark Steel Nomad DX12 score of 2,257 and Geekbench Metal score of 128,981 demonstrate strong DX12 and Metal performance, though no direct 6650M comparison exists for those tests. The 6850M XT's 92nd percentile ranking and its proximity to the RTX 5090 (within 1.1%) make it a credible high-end mobile GPU. The 6650M's wins are narrower: it consumes 45 W less power (120 W vs. 165 W), runs on a smaller die (237 mm² vs. 335 mm²), and still delivers 91st-percentile performance. It suits laptops where battery life and thermals take priority over frame rates, or where the chassis cannot dissipate 165 W. In pure benchmark terms, the 6850M XT wins 2-0; the 6650M's only advantages are physical—power draw and die size—not performance.