AMD Radeon RX 6650 XT vs NVIDIA Quadro RTX 5000 Comparison

The NVIDIA Quadro RTX 5000 and AMD Radeon RX 6650 XT are two very different GPUs from different eras, targeting different workloads. The data shows a clear split: the Quadro dominates in compute and API-level tests, while the Radeon wins in DirectX gaming scenarios and 2D performance. The Quadro RTX 5000, a Turing-generation workstation card, leverages its massive 16 GB memory, 384 tensor cores, and 48 RT cores to crush OpenCL workloads. The Radeon RX 6650 XT, built on RDNA 2.0, uses its higher clock speeds and newer architecture to deliver superior DirectX 11, 12, and 9 frame rates. For professionals relying on OpenCL compute, the Quadro is the only choice; for gamers or users prioritizing DirectX performance, the Radeon is clearly ahead.

The Verdict

The benchmark results indicate that these cards serve fundamentally different purposes, and the "best" choice depends entirely on the application. The NVIDIA Quadro RTX 5000 wins 3 of the 9 head-to-head tests, while the AMD Radeon RX 6650 XT wins 6. This is not a close contest overall; it is a matter of workload specialization.

Pick the NVIDIA Quadro RTX 5000 if your primary applications are compute-heavy and use OpenCL or Vulkan APIs. Its Geekbench OpenCL score of 78,999 is a staggering 681.3% higher than the Radeon’s 10,111, a gap so large it defines the card’s purpose. It also leads in Vulkan, scoring 92,309 versus 81,306, a 13.5% advantage. The Quadro’s 16 GB VRAM and 448.0 GB/s bandwidth provide the memory capacity and throughput needed for large datasets, while its 384 tensor cores offer AI acceleration capabilities the Radeon lacks entirely. Its average benchmark score of 21,629 places it in the 67th percentile of all GPUs, slightly ahead of its nearest rival, the NVIDIA GeForce GTX 1060 6 GB, by 1%.

Pick the AMD Radeon RX 6650 XT for gaming or any DirectX-centric workload. It wins the PassMark DirectX 11 (169 vs 140, a 17.2% lead), DirectX 12 (62 vs 59, a 4.8% lead), and DirectX 9 (215 vs 195, a 9.3% lead) tests. Its PassMark G3D score of 17,166 is 9% higher than the Quadro's 15,616, and its G2D score of 918 is 22.8% higher. The Radeon also wins in GPU compute (7,532 vs 6,525, a 13.4% advantage) in the PassMark suite, despite losing OpenCL. Its average benchmark score is 19,765, placing it in the 65th percentile, with its closest rival being the NVIDIA Tesla K40m, which it trails by just 0.6%. For a card that consumes less power and is physically smaller, the Radeon delivers superior traditional rasterization performance.

Architecture Differences

The two GPUs are built on completely different architectures and manufacturing processes. The NVIDIA Quadro RTX 5000 uses the TU104 chip, based on the Turing architecture, fabricated on a 12 nm process at TSMC. This older, larger node results in a die size of 545 mm² and houses 13,600 million transistors, giving it a transistor density of 25.0 million per mm². In contrast, the AMD Radeon RX 6650 XT uses the Navi 23 chip, based on the RDNA 2.0 architecture, on a more advanced 7 nm process, also from TSMC. This smaller node allows for a significantly smaller die at 237 mm², yet it packs 11,060 million transistors, resulting in a much higher density of 46.7 million per mm².

The core configurations differ markedly. The Quadro RTX 5000 features 3,072 shading units, 192 TMUs, and 64 ROPs, complemented by 48 RT cores and 384 tensor cores. The Radeon RX 6650 XT has fewer shading units (2,048) and TMUs (128), but maintains the same 64 ROPs. It includes 32 RT cores but has no tensor cores, a key architectural divergence. The Radeon compensates with much higher clock speeds: its base clock is 2055 MHz and boost is 2635 MHz, compared to the Quadro's 1620 MHz base and 1815 MHz boost. This clock advantage helps the Radeon achieve a higher pixel rate of 168.6 GPixel/s versus the Quadro's 116.2 GPixel/s, although the Quadro's texture rate is slightly higher at 348.5 GTexel/s versus 337.3 GTexel/s.

Memory architecture also diverges. The Quadro RTX 5000 offers 16 GB of GDDR6 on a 256-bit bus, yielding 448.0 GB/s bandwidth. The Radeon has half the capacity (8 GB) on a narrower 128-bit bus, resulting in 280.3 GB/s bandwidth. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, but the Quadro’s feature set is augmented by its tensor cores, which are absent on the Radeon.

Head-to-Head Benchmarks

The most decisive result is in Geekbench OpenCL, where the NVIDIA Quadro RTX 5000 scores 78,999 against the AMD Radeon RX 6650 XT's 10,111. This 681.3% margin is the single largest win in the comparison and highlights the Quadro's dominance in general-purpose compute. The Radeon's low score suggests its architecture is less optimized for this specific workload, despite its modern design. The Quadro's 384 tensor cores and 16 GB frame buffer likely contribute to this massive lead.

In Geekbench Vulkan, the Quadro again takes the lead, scoring 92,309 to the Radeon's 81,306, a 13.5% difference. This shows the Quadro maintains an advantage in modern, low-level graphics APIs that are used in both professional visualization and some games. The Radeon’s RDNA 2.0 architecture is no slouch, but it cannot match the Quadro’s raw compute throughput in this test.

The tables turn entirely in the PassMark suite. The AMD Radeon RX 6650 XT wins the DirectX 11 test with a score of 169, a 17.2% improvement over the Quadro's 140. In DirectX 12, the Radeon scores 62 versus 59, a narrower 4.8% win. In DirectX 9, the Radeon’s 215 beats the Quadro's 195 by 9.3%. These results indicate that for legacy and current DirectX gaming APIs, the Radeon is the faster card, likely due to its higher clock speeds and more efficient RDNA 2.0 architecture.

The Radeon also secures wins in the less graphics-intensive tests. Its PassMark G2D score of 918 is 22.8% higher than the Quadro's 709, indicating faster 2D desktop and image processing performance. In the PassMark G3D test, which is a more holistic 3D gaming benchmark, the Radeon scores 17,166 versus 15,616, a 9% advantage. Finally, in PassMark GPU Compute, the Radeon wins 7,532 to 6,525, a 13.4% lead, which is surprising given the Quadro's massive OpenCL win, showing that different compute benchmarks can favor different architectures.

Specification Differences

The two cards diverge on nearly every specification except for ROPs, slot width, API support, and production status.

• Process Node: NVIDIA Quadro RTX 5000 is 12 nm; AMD Radeon RX 6650 XT is 7 nm.
• Chip / Architecture: TU104 / Turing vs Navi 23 / RDNA 2.0.
• Transistors / Die Size: 13,600 million / 545 mm² vs 11,060 million / 237 mm².
• Transistor Density: 25.0M / mm² vs 46.7M / mm².
• Base Clock: 1620 MHz vs 2055 MHz.
• Boost Clock: 1815 MHz vs 2635 MHz.
• Game Clock: N/A vs 2410 MHz.
• Memory Size / Bus Width: 16 GB / 256-bit vs 8 GB / 128-bit.
• Memory Bandwidth: 448.0 GB/s vs 280.3 GB/s.
• Shading Units / TMUs: 3072 / 192 vs 2048 / 128.
• RT Cores / Tensor Cores: 48 / 384 vs 32 / None.
• Pixel Rate / Texture Rate: 116.2 GPixel/s / 348.5 GTexel/s vs 168.6 GPixel/s / 337.3 GTexel/s.
• FP32 / FP16: 11.15 TFLOPS / 22.30 TFLOPS vs 10.79 TFLOPS / 21.59 TFLOPS.
• TDP / Suggested PSU: 230 W / 550 W vs 176 W / 450 W.
• Power Connectors: 1x 6-pin + 1x 8-pin vs 1x 8-pin.
• Bus Interface: PCIe 3.0 x16 vs PCIe 4.0 x8.
• Display Outputs: 4x DisplayPort 1.4a + 1x USB Type-C vs 1x HDMI 2.1 + 3x DisplayPort 1.4a.
• Release Date: 2018-08-12 vs 2022-05-09.
• Predecessor / Successor: Quadro Volta / Workstation Ampere vs Navi / Navi III.

FAQ

Q: Which GPU is faster for compute workloads?

A: The NVIDIA Quadro RTX 5000 is significantly faster in compute. Its Geekbench OpenCL score of 78,999 is 681.3% higher than the Radeon RX 6650 XT's 10,111, and it also leads in Geekbench Vulkan with a 13.5% advantage (92,309 vs 81,306).

Q: Which GPU is better for gaming performance?

A: The AMD Radeon RX 6650 XT is better for gaming, winning the PassMark DirectX 11 (169 vs 140), DirectX 12 (62 vs 59), and DirectX 9 (215 vs 195) tests. Its PassMark G3D score of 17,166 is also 9% higher than the Quadro's 15,616.

Q: How do their memory configurations differ?

A: The NVIDIA Quadro RTX 5000 has 16 GB of GDDR6 memory on a 256-bit bus, providing 448.0 GB/s of bandwidth. The AMD Radeon RX 6650 XT has 8 GB of GDDR6 on a 128-bit bus, providing 280.3 GB/s of bandwidth.

Q: What are the key architectural differences between the two cards?

A: The Quadro RTX 5000 uses the 12 nm Turing architecture (TU104 chip) and includes 384 tensor cores, while the Radeon RX 6650 XT uses the 7 nm RDNA 2.0 architecture (Navi 23 chip) and has no tensor cores. The Radeon has a higher transistor density (46.7M / mm² vs 25.0M / mm²) and higher clock speeds.

Q: Which card has more shading units?

A: The NVIDIA Quadro RTX 5000 has 3,072 shading units, which is 50% more than the AMD Radeon RX 6650 XT's 2,048 shading units, despite the Radeon's higher overall clock speeds.

Q: How do their power requirements compare?

A: The AMD Radeon RX 6650 XT has a lower TDP of 176 W and requires a 450 W power supply, while the NVIDIA Quadro RTX 5000 has a TDP of 230 W and suggests a 550 W PSU. The Radeon also uses a single 8-pin power connector compared to the Quadro's 6-pin plus 8-pin configuration.