AMD Radeon RX 6650 XT vs NVIDIA Quadro RTX 4000 Comparison

Head-to-Head Benchmarks

The benchmark comparison between the AMD Radeon RX 6650 XT and the NVIDIA Quadro RTX 4000 reveals a decisive overall advantage for the AMD card. Out of ten shared tests, the RX 6650 XT takes eight wins, while the Quadro RTX 4000 secures only two. The most striking result is in Geekbench OpenCL, where the Quadro RTX 4000 scores 74,540 against the RX 6650 XT's 10,111, a margin of 86.4% in NVIDIA's favor. This is the single largest delta in either direction, and it skews the narrative toward NVIDIA in compute-heavy workloads. However, every other test tells a different story.

The RX 6650 XT leads in Passmark DirectX 11 with 169 versus 128, a 32% advantage. That is a substantial gap for a legacy API that still appears in many titles and applications. In Passmark DirectX 12, the AMD card wins 62 to 52, a 19.2% lead. DirectX 9 shows a narrower margin: 215 versus 205, a 4.9% win for the RX 6650 XT. The Passmark G3D score, which aggregates general 3D performance, favors AMD at 17,166 versus 15,117, a 13.6% lead. Passmark GPU Compute also goes to AMD, 7,532 versus 6,176, a 22% margin.

In the modern DirectX 12 based 3DMark Steel Nomad test, the two cards are nearly tied. The Quadro RTX 4000 edges out the RX 6650 XT by a single percentage point, 1,873 versus 1,859. That is a negligible difference, suggesting that raw modern rasterization performance is essentially equivalent. The Geekbench Vulkan test is closer than the OpenCL result, with AMD winning 81,306 versus 78,844, a 3.1% lead. Passmark G2D, a 2D rendering test, goes to AMD at 918 versus 846, an 8.5% advantage. Finally, Passmark DirectX 10 is a near-tie, with AMD at 109 and NVIDIA at 108, a 0.9% difference.

The data suggests a pattern: the RX 6650 XT dominates in legacy and general-purpose graphics workloads, while the Quadro RTX 4000 shows a massive but isolated strength in OpenCL compute. The 3DMark result indicates that in the most current gaming API, neither card holds a meaningful edge.

Architecture Differences

The two GPUs come from fundamentally different design philosophies and process generations. The AMD Radeon RX 6650 XT uses the Navi 23 chip on RDNA 2.0 architecture, built on TSMC's 7 nm process. It packs 11,060 million transistors into a 237 mm² die, yielding a transistor density of 46.7M per mm². The NVIDIA Quadro RTX 4000 uses the TU104 chip on the Turing architecture, fabricated on a 12 nm process. It contains 13,600 million transistors across a much larger 545 mm² die, giving a transistor density of 25.0M per mm². The AMD chip is more than twice as dense per square millimeter, a direct consequence of the newer process node.

Clock speeds reflect these architectural choices. The RX 6650 XT runs at a base clock of 2055 MHz, a boost clock of 2635 MHz, and a game clock of 2410 MHz. The Quadro RTX 4000 is far more conservative, with a base of 1005 MHz and a boost of 1545 MHz. The AMD card also has a significantly higher memory clock at 2190 MHz (17.5 Gbps effective) versus the NVIDIA card's 1625 MHz (13 Gbps effective). Despite the NVIDIA card's larger memory bus width of 256 bit versus 128 bit, the bandwidth figures are 416.0 GB/s for the Quadro RTX 4000 and 280.3 GB/s for the RX 6650 XT. The NVIDIA card wins on raw bandwidth, but the AMD card compensates with its much higher clock speeds.

Core counts differ as well. The RX 6650 XT has 2048 shading units, 128 texture mapping units, and 64 ROPs. The Quadro RTX 4000 has 2304 shading units, 144 TMUs, and 64 ROPs. NVIDIA holds a 12.5% lead in shader cores and a 12.5% lead in TMUs. However, AMD has 32 ray tracing cores, while NVIDIA has 36 RT cores. NVIDIA additionally includes 288 tensor cores, which AMD's chip lacks entirely. This tensor core presence is a major architectural differentiator, as it enables dedicated AI and deep learning acceleration.

The resulting throughput numbers favor AMD. The RX 6650 XT achieves a pixel rate of 168.6 GPixel/s and a texture rate of 337.3 GTexel/s, while the Quadro RTX 4000 manages 98.88 GPixel/s and 222.5 GTexel/s. In FP32 compute, the AMD card delivers 10.79 TFLOPS versus 7.119 TFLOPS for NVIDIA. FP16 rates are 21.59 TFLOPS for AMD and 14.24 TFLOPS for NVIDIA, both at a 2:1 ratio. The RX 6650 XT is the faster card on paper for pure raster throughput, despite the NVIDIA card's larger die and higher transistor count.

Physical specifications also diverge. The RX 6650 XT is a dual-slot card, while the Quadro RTX 4000 is a single-slot design. The NVIDIA card has a documented length of 241 mm (9.5 inches) and height of 111 mm (4.4 inches), while the AMD card's dimensions are not recorded. Both use a single 8-pin power connector and a suggested 450 W PSU, but the TDP differs: 176 W for AMD and 160 W for NVIDIA. The bus interface shows the generational gap, with AMD using PCIe 4.0 x8 and NVIDIA using PCIe 3.0 x16. Display outputs are also different: AMD offers 1x HDMI 2.1 and 3x DisplayPort 1.4a, while NVIDIA provides 3x DisplayPort 1.4a and 1x USB Type-C.

Where Each One Wins

The benchmark data points to distinct use-case strengths. The RX 6650 XT is the clear winner for gaming and legacy graphics workloads. Its Passmark DirectX 11 score is 32% higher, and its DirectX 12 score is 19.2% higher. These are the APIs most commonly used in current and older games, respectively. The 13.6% lead in Passmark G3D further supports this, as G3D is an aggregate measure of general 3D performance. For Vulkan, a modern cross-platform API, AMD holds a 3.1% edge, which is small but consistent with its other wins.

The Quadro RTX 4000's only clear victory is in OpenCL, where it is 86.4% ahead. This is a decisive margin and suggests that applications heavily leveraging OpenCL for compute, such as certain scientific simulations or professional rendering pipelines, would see a substantial benefit from the NVIDIA card. The 3DMark Steel Nomad result is effectively a tie, with NVIDIA ahead by less than 1%. This indicates that in the most recent DirectX 12 gaming scenario, neither card has a meaningful advantage.

For professional workstation tasks that use OpenCL, the Quadro RTX 4000 is the obvious choice based on the data. For gaming, legacy API compatibility, or general GPU compute in Passmark's test, the RX 6650 XT leads. The single-slot form factor of the Quadro RTX 4000 also makes it preferable for dense multi-GPU builds, though the data does not quantify that advantage. The presence of tensor cores in the NVIDIA card suggests AI workloads would favor it, but no benchmark in the database directly measures that capability.

The Verdict

The data supports a clear split decision. For gaming, the AMD Radeon RX 6650 XT is the superior choice. It wins 80% of the head-to-head tests, including all Passmark DirectX variants and the G3D aggregate. Its 32% lead in DirectX 11 and 19.2% lead in DirectX 12 are significant margins that would translate into tangible frame rate differences in many titles. The 22% advantage in Passmark GPU Compute also suggests it is the better all-around performer for mixed workloads.

For professional OpenCL compute, the NVIDIA Quadro RTX 4000 is the better option. The 86.4% advantage in Geekbench OpenCL is massive and cannot be ignored. If a workflow is dominated by OpenCL acceleration, the Quadro RTX 4000 is the clear pick. Additionally, the NVIDIA card consumes 16 W less power (160 W versus 176 W) and occupies a single slot, which may matter in constrained chassis or multi-GPU configurations. Its larger memory bandwidth (416.0 GB/s versus 280.3 GB/s) could also benefit bandwidth-sensitive tasks, even if the benchmark data does not directly show it.

The 3DMark Steel Nomad result being a near-tie suggests that modern gaming performance is essentially balanced, meaning the choice comes down to which API and workload profile matters most. The RX 6650 XT is the better gaming card, the Quadro RTX 4000 is the better compute card for OpenCL, and both are end-of-life products. The RX 6650 XT also has a higher percentile ranking at 65 versus 61, and a higher average benchmark score of 19,765 versus 17,789. Users should weigh their specific application mix against these recorded results.

FAQ

Q: Which card wins more head-to-head benchmarks?

A: The AMD Radeon RX 6650 XT wins 8 out of 10 shared tests, while the NVIDIA Quadro RTX 4000 wins only 2.

Q: Is the RX 6650 XT faster in DirectX 11?

A: Yes, the RX 6650 XT scores 169 in Passmark DirectX 11 versus 128 for the Quadro RTX 4000, a 32% advantage.

Q: Where does the Quadro RTX 4000 have a clear edge?

A: In Geekbench OpenCL, the Quadro RTX 4000 scores 74,540 versus 10,111 for the RX 6650 XT, an 86.4% lead.

Q: How do the two cards compare in modern DirectX 12 gaming?

A: The 3DMark Steel Nomad DX12 test shows a near-tie, with the Quadro RTX 4000 at 1,873 and the RX 6650 XT at 1,859, a difference of only 0.7%.

Q: Do the cards have the same memory size?

A: Yes, both have 8 GB of GDDR6 memory, but the Quadro RTX 4000 has a 256 bit bus and 416.0 GB/s bandwidth, while the RX 6650 XT has a 128 bit bus and 280.3 GB/s bandwidth.

Q: Which card has a higher average benchmark score?

A: The RX 6650 XT has an average benchmark score of 19,765, compared to 17,789 for the Quadro RTX 4000.

Specification Differences

The two cards differ across nearly every specification field. The RX 6650 XT uses a 7 nm process, while the Quadro RTX 4000 uses a 12 nm process. Transistor counts are 11,060 million for AMD and 13,600 million for NVIDIA. Die sizes are 237 mm² and 545 mm², respectively. Transistor density is 46.7M per mm² for AMD and 25.0M per mm² for NVIDIA.

Clock speeds: AMD has a base of 2055 MHz, boost of 2635 MHz, and game clock of 2410 MHz. NVIDIA has a base of 1005 MHz and boost of 1545 MHz. Memory clocks are 2190 MHz (17.5 Gbps effective) for AMD and 1625 MHz (13 Gbps effective) for NVIDIA.

Memory bus width is 128 bit for AMD and 256 bit for NVIDIA. Bandwidth is 280.3 GB/s versus 416.0 GB/s. Shading units are 2048 for AMD and 2304 for NVIDIA. TMUs are 128 versus 144. ROPs are 64 for both. RT cores are 32 for AMD and 36 for NVIDIA. The Quadro RTX 4000 has 288 tensor cores, while the RX 6650 XT has none.

Pixel rates are 168.6 GPixel/s for AMD and 98.88 GPixel/s for NVIDIA. Texture rates are 337.3 GTexel/s versus 222.5 GTexel/s. FP32 compute is 10.79 TFLOPS versus 7.119 TFLOPS. FP16 is 21.59 TFLOPS versus 14.24 TFLOPS, both with a 2:1 ratio.

TDP is 176 W for AMD and 160 W for NVIDIA. The RX 6650 XT is dual-slot, while the Quadro RTX 4000 is single-slot. Both use a single 8-pin connector and a 450 W suggested PSU. Bus interfaces are PCIe 4.0 x8 for AMD and PCIe 3.0 x16 for NVIDIA. Display outputs are 1x HDMI 2.1 plus 3x DisplayPort 1.4a for AMD, and 3x DisplayPort 1.4a plus 1x USB Type-C for NVIDIA. The Quadro RTX 4000 has recorded dimensions of 241 mm length and 111 mm height, while the RX 6650 XT has none recorded.