AMD Radeon RX 6650 XT vs NVIDIA GeForce RTX 2080 Comparison

Where Each One Wins

The recorded data splits these two cards into distinct roles. The NVIDIA GeForce RTX 2080 wins 7 of the 10 head-to-head benchmark comparisons, while the AMD Radeon RX 6650 XT takes 3. That raw count, however, hides the nature of the wins.

The RTX 2080 dominates in compute and legacy DirectX workloads. Its Geekbench OpenCL score of 91,313 is 803.1% higher than the RX 6650 XT's 10,111. That is not a close race; it is a category difference. The RTX 2080 also wins DirectX 10 (136 vs 109, a 24.8% lead), DirectX 12 (72 vs 62, a 16.1% lead), and DirectX 9 (223 vs 215, a 3.7% lead). In the broader Passmark G3D suite, the RTX 2080 scores 18,720 against 17,166, a 9.1% advantage. GPU compute also favors NVIDIA: 7,872 vs 7,532, a 4.5% margin.

The RX 6650 XT wins where modern rasterization and raw pixel throughput matter. In 3DMark Steel Nomad DX12, it scores 1,859 versus 1,752, a 5.8% lead. In Passmark DirectX 11, it scores 169 versus 158, a 6.5% lead. The Passmark G2D score also edges ahead: 918 vs 907, a 1.2% margin. These are not overwhelming wins, but they are consistent in the areas that reflect current game rendering paths.

The pattern is clear: the RTX 2080 is the compute and legacy API champion, while the RX 6650 XT holds the edge in the newer 3DMark test and DirectX 11. If your workload leans toward OpenCL, older DirectX titles, or general GPU compute, the RTX 2080 is the statistical favorite. If your focus is modern DX12 game benchmarks and 2D performance, the RX 6650 XT shows a measurable, if smaller, advantage.

Architecture Differences

The two cards come from different design philosophies separated by nearly four years of silicon evolution. The RTX 2080 uses NVIDIA's Turing architecture on a 12 nm TSMC process, built around the TU104 chip with 13,600 million transistors on a 545 mm² die. That yields a transistor density of 25.0M per mm². The RX 6650 XT uses AMD's RDNA 2.0 architecture on a 7 nm TSMC process, with the Navi 23 chip containing 11,060 million transistors on a 237 mm² die. Its density is 46.7M per mm², nearly double.

The RTX 2080 carries 2,944 shading units, 184 texture mapping units, and 64 ROPs. It also includes 46 ray tracing cores and 368 tensor cores, the latter being a Turing hallmark absent from the AMD card. The RX 6650 XT has 2,048 shading units, 128 TMUs, and 64 ROPs, with 32 ray tracing cores but no tensor core equivalent.

Clock behavior differs sharply. The RTX 2080 runs a 1515 MHz base and 1710 MHz boost. The RX 6650 XT starts at 2055 MHz base, boosts to 2635 MHz, and has a game clock of 2410 MHz. That higher clock rate explains how the AMD card achieves a higher pixel rate of 168.6 GPixel/s versus 109.4 GPixel/s for NVIDIA, despite fewer ROPs. Texture rate also favors AMD: 337.3 GTexel/s versus 314.6 GTexel/s.

Memory subsystems diverge. Both have 8 GB GDDR6, but the RTX 2080 uses a 256-bit bus with 448.0 GB/s bandwidth, while the RX 6650 XT uses a 128-bit bus with 280.3 GB/s. The AMD card compensates with faster memory clocks: 17.5 Gbps effective versus 14 Gbps effective. The RTX 2080's memory clock is listed at 1750 MHz.

Interface and power draw also differ. The RTX 2080 uses PCIe 3.0 x16 and a 215 W TDP with a 550 W suggested PSU. The RX 6650 XT uses PCIe 4.0 x8, a 176 W TDP, and a 450 W suggested PSU. The RTX 2080 requires two power connectors (1x 6-pin and 1x 8-pin), while the AMD card needs only one 8-pin. The RTX 2080 also adds a USB Type-C display output, which the RX 6650 XT lacks.

The FP32 compute figures are close: 10.07 TFLOPS for NVIDIA and 10.79 TFLOPS for AMD. FP16 also mirrors this: 20.14 TFLOPS versus 21.59 TFLOPS, both at a 2:1 ratio. Yet the RTX 2080's OpenCL result is dramatically higher, suggesting that benchmark favors its tensor core or driver path.

The Verdict

The data supports a clear split decision. The NVIDIA GeForce RTX 2080 is the choice for compute-heavy tasks and legacy API workloads. Its 803.1% OpenCL advantage is the single largest margin in the entire comparison. It also wins DirectX 10, DirectX 12, DirectX 9, Passmark G3D, and GPU compute. If your software uses OpenCL for rendering, simulation, or general math, the RTX 2080 is overwhelmingly ahead in the recorded measurements.

The AMD Radeon RX 6650 XT is the choice for modern game-focused benchmarks. It wins 3DMark Steel Nomad DX12, DirectX 11, and G2D. Its 5.8% lead in the 3DMark test is modest but real, and it achieves this with a lower TDP of 176 W versus 215 W. The AMD card also has a higher pixel rate and texture rate, which align with current game rendering trends.

For an end-of-life product comparison, the RTX 2080 holds the higher average benchmark score at 22,895 versus 19,765 for the RX 6650 XT. That is a 15.8% overall gap. The RTX 2080 also sits at the 68th percentile of all GPUs, while the RX 6650 XT sits at the 65th. The nearest rivals confirm this positioning: the RTX 2080 trades blows with the Intel Arc B580 (23,021, -0.5%) and the RTX 3080 (23,172, -1.2%), while the RX 6650 XT sits near the Tesla K40m and Quadro K5200 range.

The verdict is simple: pick the RTX 2080 for compute and legacy APIs, pick the RX 6650 XT for modern game benchmarks and lower power draw. Neither card is a universal winner, but the RTX 2080's overall score and 7-3 win count make it the stronger all-around card in this database.

FAQ

Q: Which card has the higher average benchmark score?

A: The NVIDIA GeForce RTX 2080 averages 22,895, while the AMD Radeon RX 6650 XT averages 19,765. That is a 15.8% difference in favor of NVIDIA.

Q: Is the RX 6650 XT faster in any modern DirectX 12 test?

A: Yes. In 3DMark Steel Nomad DX12, the RX 6650 XT scores 1,859 versus 1,752 for the RTX 2080, a 5.8% lead. However, in Passmark DirectX 12, the RTX 2080 wins 72 to 62.

Q: How large is the OpenCL performance gap?

A: The RTX 2080 scores 91,313 in Geekbench OpenCL, while the RX 6650 XT scores 10,111. The RTX 2080 is 803.1% ahead, the largest margin in any benchmark between these two cards.

Q: Do both cards have the same memory size and type?

A: Yes, both have 8 GB of GDDR6. The RTX 2080 uses a 256-bit bus with 448.0 GB/s bandwidth, while the RX 6650 XT uses a 128-bit bus with 280.3 GB/s bandwidth.

Q: Which card has ray tracing cores?

A: Both have them. The RTX 2080 has 46 ray tracing cores, and the RX 6650 XT has 32. The RTX 2080 also has 368 tensor cores, which the AMD card does not have.

Q: What are the power connector requirements?

A: The RTX 2080 requires a 1x 6-pin and 1x 8-pin connector, with a 215 W TDP and a 550 W suggested PSU. The RX 6650 XT requires a single 8-pin connector, with a 176 W TDP and a 450 W suggested PSU.

Head-to-Head Benchmarks

The largest win belongs to the RTX 2080 in Geekbench OpenCL. Its 91,313 score versus 10,111 is an 803.1% margin. No other comparison comes close. This single result drives the RTX 2080's overall average upward and establishes it as the compute king in this pairing.

Geekbench Vulkan also favors NVIDIA, but by a smaller margin: 107,797 versus 81,306, a 32.6% lead. This indicates that even in a modern graphics API, the RTX 2080's architecture extracts more performance from the same workload class.

DirectX 10 shows a 24.8% NVIDIA advantage (136 vs 109), and DirectX 12 shows a 16.1% lead (72 vs 62). These are legacy and current API tests respectively, and the RTX 2080 wins both. Passmark G3D adds a 9.1% win (18,720 vs 17,166), and GPU compute adds a 4.5% win (7,872 vs 7,532). DirectX 9 is the closest NVIDIA win: 223 versus 215, a 3.7% margin.

The RX 6650 XT's wins are smaller but consistent. The 3DMark Steel Nomad DX12 result (1,859 vs 1,752) is a 5.8% lead. Passmark DirectX 11 shows 169 versus 158, a 6.5% lead. The G2D test is the narrowest AMD win: 918 versus 907, a 1.2% margin.

The pattern in the head-to-head data is that NVIDIA wins by larger margins in more tests, while AMD wins by smaller margins in fewer tests. The RTX 2080's wins include three tests with double-digit percentage leads, while the RX 6650 XT's largest win is only 6.5%. This asymmetry explains why the RTX 2080's average score is significantly higher despite losing three tests.

Specification Differences

The two cards differ in every major specification category except memory size, memory type, ROP count, DirectX version, OpenGL version, Vulkan version, and slot width. Both are dual-slot cards with 8 GB GDDR6, 64 ROPs, DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The process node differs: 12 nm for the RTX 2080 versus 7 nm for the RX 6650 XT. The RTX 2080 has a larger die (545 mm² versus 237 mm²) and more transistors (13,600 million versus 11,060 million), but lower density (25.0M versus 46.7M per mm²). The RTX 2080 has 2,944 shading units, 184 TMUs, 46 RT cores, and 368 tensor cores. The RX 6650 XT has 2,048 shading units, 128 TMUs, and 32 RT cores, with no tensor cores.

Clocks favor AMD: 2055 MHz base and 2635 MHz boost versus 1515 MHz and 1710 MHz. The AMD card also has a game clock of 2410 MHz, which the RTX 2080 lacks. Memory clocks differ too: 1750 MHz (14 Gbps effective) for NVIDIA versus 2190 MHz (17.5 Gbps effective) for AMD.

Bus width and bandwidth favor NVIDIA: 256-bit and 448.0 GB/s versus 128-bit and 280.3 GB/s. Pixel rate favors AMD (168.6 GPixel/s versus 109.4 GPixel/s), as does texture rate (337.3 GTexel/s versus 314.6 GTexel/s). FP32 is nearly identical: 10.07 TFLOPS versus 10.79 TFLOPS. FP16 follows the same pattern: 20.14 TFLOPS versus 21.59 TFLOPS, both at 2:1.

Power and connectivity differ. TDP is 215 W for NVIDIA and 176 W for AMD. Suggested PSU is 550 W versus 450 W. Power connectors are 1x 6-pin plus 1x 8-pin for NVIDIA, and 1x 8-pin for AMD. The bus interface is PCIe 3.0 x16 versus PCIe 4.0 x8. Display outputs are 1x HDMI 2.0, 3x DisplayPort 1.4a, and 1x USB Type-C for NVIDIA, versus 1x HDMI 2.1 and 3x DisplayPort 1.4a for AMD.

Physical dimensions are only recorded for the RTX 2080: 267 mm length, 116 mm height, and 35 mm width. The RX 6650 XT has no recorded dimensions. Both cards are end-of-life, with the RTX 2080 releasing on 2018-09-19 and the RX 6650 XT on 2022-05-09. The launch MSRP for the RTX 2080 was 699 USD, and for the RX 6650 XT it was 399 USD.