AMD Radeon RX 6650M vs NVIDIA TITAN X Pascal Comparison

Head-to-Head Benchmarks

The benchmark data presents a remarkably close contest between the NVIDIA TITAN X Pascal and the AMD Radeon RX 6650M. Across the two workloads measured, each card claims one victory, and the margins are razor-thin. In Geekbench OpenCL, the TITAN X Pascal scores 66,696 against the RX 6650M’s 65,800, a 1.4% advantage for the NVIDIA part. The Vulkan test flips the result: the RX 6650M posts 77,735 versus 77,499 for the TITAN X Pascal, a 0.3% edge for AMD. Neither card dominates the other in a way that would suggest a clear hierarchy; instead, the data points to workload-specific strengths.

Contextualizing these scores against the nearest rivals clarifies the picture. The TITAN X Pascal’s average benchmark score is 72,098, placing it 0.4% behind the AMD Radeon Pro Vega 64 (72,379) and 1.8% ahead of the AMD Radeon RX 6600 LE (70,829). The RX 6650M averages 71,768, which is 0.8% below the Pro Vega 64 and 1.3% above the RX 6600 LE. Both cards sit at the 91st percentile among all GPUs, meaning they outperform roughly nine out of ten GPUs in the database. The deltaPct between the two cards themselves is a mere 0.5% in favor of the TITAN X Pascal on average score — a statistical tie in practical terms.

Breaking down the individual benchmarks, the OpenCL result shows the TITAN X Pascal’s strength in compute-heavy workloads. A 1.4% lead, while modest, is consistent across the score distribution. The Vulkan result, however, demonstrates the RX 6650M’s efficiency in modern graphics APIs, where it edges ahead by 0.3%. Each card’s win is within the margin of error typical for synthetic benchmarks, but the direction of each result aligns with the architectural priorities of each GPU. The TITAN X Pascal’s raw compute throughput and the RX 6650M’s newer, more efficient design each find their respective niches.

The Verdict

The data does not crown a single winner; it delineates two distinct use cases. For users prioritizing OpenCL compute workloads, the NVIDIA TITAN X Pascal offers a measurable, if small, advantage — 1.4% over the RX 6650M in that specific test. For those whose applications leverage Vulkan, the AMD Radeon RX 6650M is the better choice by 0.3%. The average benchmark scores, which aggregate across both tests, favor the TITAN X Pascal by 0.5% (72,098 versus 71,768), but this gap is negligible in real-world terms.

The TITAN X Pascal is a desktop-class card from 2016, designed for maximum compute throughput in a dual-slot, 250 W envelope. The RX 6650M, released in 2022, is a mobile IGP (integrated graphics processor) with a 120 W TDP, built for laptops. The choice between them hinges on the host system: the TITAN X Pascal is a standalone expansion card for a desktop PCIe 3.0 x16 slot, whereas the RX 6650M is soldered into a portable device with no standalone power connectors. If the platform is fixed, the decision is made by form factor. If the platform is flexible, the data suggests that neither card has a decisive performance edge — the TITAN X Pascal wins the average score, but by less than 1% of the RX 6650M’s total.

Both cards are end-of-life, so availability is a secondary concern. The TITAN X Pascal has a launch MSRP of 1,199 USD; the RX 6650M has no listed MSRP. For compute-heavy OpenCL tasks on a desktop, the TITAN X Pascal is the data-backed pick. For Vulkan-based graphics in a mobile system, the RX 6650M is the only viable option. In a vacuum, the benchmark results are too close to justify a strong recommendation for either card based on performance alone.

Architecture Differences

The two GPUs are separated by six years of design philosophy. The NVIDIA TITAN X Pascal uses the GP102 chip on a 16 nm TSMC process, packing 11,800 million transistors into a 471 mm² die. The transistor density is 25.1 million per square millimeter. The AMD Radeon RX 6650M uses the Navi 23 chip on a 7 nm TSMC process, with 11,060 million transistors in a 237 mm² die, achieving a density of 46.7 million per square millimeter. The newer process node allows AMD to nearly halve the die size while maintaining a similar transistor count, which directly contributes to the RX 6650M’s lower power draw.

The TITAN X Pascal is built on the Pascal architecture, part of the GeForce 10 generation, succeeding the GeForce 900 series and preceding the GeForce 20 series. It employs 3,584 shading units, 224 texture mapping units, and 96 raster output pipelines. The RX 6650M uses the RDNA 2.0 architecture, part of the Radeon RX 6000 series, succeeding Polaris Mobile. It has 1,792 shading units, 112 TMUs, and 64 ROPs — roughly half the shader count of the TITAN X Pascal — but it adds 28 ray tracing cores, a feature the NVIDIA card lacks entirely. The TITAN X Pascal has no RT cores and no tensor cores; the RX 6650M also has no tensor cores.

The memory subsystems diverge sharply. The TITAN X Pascal uses 12 GB of GDDR5X on a 384-bit bus, yielding 480.4 GB/s of bandwidth. The RX 6650M uses 8 GB of GDDR6 on a 128-bit bus, delivering 224.0 GB/s — less than half the bandwidth. The RX 6650M’s memory clock runs at 1750 MHz (14 Gbps effective), while the TITAN X Pascal’s runs at 1251 MHz (10 Gbps effective). The AMD card’s higher clock rate does not compensate for the narrower bus. The TITAN X Pascal’s pixel rate is 147.0 GPixel/s versus 154.6 GPixel/s for the RX 6650M, and its texture rate is 342.9 GTexel/s versus 270.6 GTexel/s. FP32 throughput is 10.97 TFLOPS for NVIDIA and 8.659 TFLOPS for AMD. The FP16 comparison is stark: the TITAN X Pascal delivers 171.5 GFLOPS (1:64 ratio), while the RX 6650M delivers 17.32 TFLOPS (2:1 ratio) — a 100x difference in favor of AMD for half-precision work.

API support also differs. The TITAN X Pascal supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4. The RX 6650M supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The 12_2 feature level on the AMD card enables hardware ray tracing and mesh shaders, which the Pascal card cannot access.

Specification Differences

The two cards differ on nearly every measurable specification. The process node is 16 nm for NVIDIA versus 7 nm for AMD. Transistor count is similar (11,800 million versus 11,060 million), but die size is 471 mm² versus 237 mm². Base clock is 1417 MHz for the TITAN X Pascal versus 2068 MHz for the RX 6650M; boost clock is 1531 MHz versus 2416 MHz. The AMD card also lists a game clock of 2222 MHz, which the NVIDIA card does not have. Memory size is 12 GB versus 8 GB, type is GDDR5X versus GDDR6, bus width is 384-bit versus 128-bit, and bandwidth is 480.4 GB/s versus 224.0 GB/s.

Shading units are 3,584 versus 1,792, TMUs are 224 versus 112, and ROPs are 96 versus 64. The RX 6650M has 28 RT cores; the TITAN X Pascal has none. Pixel rate is 147.0 versus 154.6 GPixel/s; texture rate is 342.9 versus 270.6 GTexel/s. FP32 is 10.97 versus 8.659 TFLOPS; FP16 is 171.5 GFLOPS versus 17.32 TFLOPS. TDP is 250 W versus 120 W. The TITAN X Pascal is dual-slot with 1x 6-pin and 1x 8-pin power connectors and a 600 W suggested PSU; the RX 6650M is an IGP with no power connectors and no suggested PSU. Bus interface is PCIe 3.0 x16 versus PCIe 4.0 x8. Display outputs are 1x DVI, 1x HDMI 2.0, and 3x DisplayPort 1.4a for NVIDIA, versus "Portable Device Dependent" for AMD. The TITAN X Pascal measures 267 mm x 112 mm x 40 mm; the RX 6650M has no listed dimensions. Release dates are August 2016 versus January 2022. The NVIDIA card has a launch MSRP of 1,199 USD; the AMD card has none.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA TITAN X Pascal averages 72,098, which is 0.5% higher than the AMD Radeon RX 6650M’s 71,768. This places the TITAN X Pascal 0.4% ahead of the RX 6650M in the nearestRivals deltaPct, though both cards sit at the 91st percentile among all GPUs.

Q: How do the two cards compare in Vulkan performance?

A: In the Geekbench Vulkan test, the AMD Radeon RX 6650M scores 77,735, beating the NVIDIA TITAN X Pascal’s 77,499 by 0.3%. This is the only benchmark where the AMD card wins.

Q: What is the difference in memory bandwidth?

A: The TITAN X Pascal offers 480.4 GB/s of bandwidth from 12 GB of GDDR5X on a 384-bit bus, while the RX 6650M offers 224.0 GB/s from 8 GB of GDDR6 on a 128-bit bus. The NVIDIA card has more than double the bandwidth.

Q: Does the AMD Radeon RX 6650M support ray tracing?

A: Yes. The RX 6650M has 28 ray tracing cores and supports DirectX 12 Ultimate (12_2), which includes hardware ray tracing. The NVIDIA TITAN X Pascal has no RT cores and only supports DirectX 12 (12_1).

Q: Which card has a higher FP16 compute throughput?

A: The AMD Radeon RX 6650M delivers 17.32 TFLOPS FP16 (2:1 ratio), which is dramatically higher than the NVIDIA TITAN X Pascal’s 171.5 GFLOPS FP16 (1:64 ratio). The AMD card outperforms the NVIDIA card by approximately two orders of magnitude in half-precision compute.

Q: What are the power requirements for each card?

A: The TITAN X Pascal has a 250 W TDP, requires dual-slot cooling, and needs 1x 6-pin plus 1x 8-pin power connectors with a 600 W suggested PSU. The RX 6650M has a 120 W TDP, is an IGP with no power connectors, and has no suggested PSU listed.