AMD Radeon RX 6600S vs NVIDIA Quadro K5000 Comparison

Head-to-Head Benchmarks

The only directly comparable benchmark between these two cards is Geekbench OpenCL, and the result is decisively lopsided. The AMD Radeon RX 6600S scores 66,435 points, while the NVIDIA Quadro K5000 manages 11,418 points. That is a 481.8% advantage for the AMD part, meaning the RX 6600S delivers roughly five times the OpenCL compute throughput of the older Quadro.

This gap is not merely a percentage difference on a synthetic workload; it reflects a fundamental shift in compute capabilities between the two generations. The RX 6600S produces 7.168 TFLOPS of FP32 performance, while the Quadro K5000 is rated at 2.169 TFLOPS. The AMD card also reaches 14.34 TFLOPS of FP16 performance with a 2:1 ratio, a feature the Quadro does not expose at all. For any workload that leans on OpenCL, the RX 6600S is in a different class entirely.

In other benchmark suites, the comparison becomes complicated by the fact that the two cards were tested under different conditions. The RX 6600S has results in Passmark DirectX 9, 10, 11, and 12, along with Passmark G2D, G3D, and compute tests. The Quadro K5000 only has Geekbench Metal, OpenCL, and Vulkan scores. There is no overlapping DirectX or Vulkan result, so the only head-to-head measurement available is the OpenCL one. Within that single data point, the AMD part wins outright, and the database records one win for the RX 6600S and zero for the Quadro K5000.

The average benchmark score tells a similar story, though with less drama. The RX 6600S averages 10,629 points across its tested workloads, while the Quadro K5000 averages 9,637 points. That is roughly a 10% advantage for the AMD card in aggregate terms. However, the RX 6600S sits at the 49th percentile among all GPUs, while the Quadro K5000 is at the 46th percentile. Both are mid-pack performers, but the RX 6600S is consistently ahead, not just in the one direct comparison but in overall standing.

Architecture Differences

The two cards come from different eras and different design philosophies. The RX 6600S is built on the Navi 23 chip using AMD's RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. The Quadro K5000 uses the GK104 chip with NVIDIA's Kepler architecture, fabricated on a 28 nm process, also at TSMC. The process node difference alone explains much of the performance and efficiency gap: 7 nm versus 28 nm is a four-generation jump in lithography.

Transistor counts reinforce this divide. The RX 6600S packs 11,060 million transistors on a 237 mm² die, giving a transistor density of 46.7 million per square millimeter. The Quadro K5000 has 3,540 million transistors on a 294 mm² die, for a density of 12.0 million per square millimeter. The AMD chip crams more than three times the transistors into a smaller physical area, which is the direct result of the denser process node.

Memory configurations differ in capacity but not in size. Both cards have 4 GB of VRAM, but the RX 6600S uses GDDR6 on a 128-bit bus, delivering 224.0 GB/s of bandwidth. The Quadro K5000 uses GDDR5 on a 256-bit bus, delivering 172.8 GB/s. The AMD card achieves higher bandwidth with half the bus width, thanks to faster memory clocks. The RX 6600S memory runs at 1750 MHz with an effective data rate of 14 Gbps, while the Quadro runs at 1350 MHz with an effective rate of 5.4 Gbps.

Compute resource allocation also diverges sharply. The RX 6600S has 1,792 shading units, 112 texture mapping units, and 64 render output units. It also includes 28 dedicated ray tracing cores, a feature absent from the Quadro. The Quadro K5000 has 1,536 shading units, 128 TMUs, and only 32 ROPs. Despite having fewer shaders, the Quadro has more TMUs, but its pixel rate of 22.59 GPixel/s is far below the RX 6600S's 128.0 GPixel/s. The texture rate tells the same story: 90.37 GTexel/s for the Quadro versus 224.0 GTexel/s for the RX 6600S.

Power and interface details are equally revealing. The RX 6600S has a TDP of 80 W and is designed as an integrated graphics package with no power connectors and no dedicated slot width. The Quadro K5000 draws 122 W, requires a dual-slot cooler and a single 6-pin power connector, and demands a 300 W power supply. The RX 6600S uses PCIe 4.0 x8, while the Quadro is limited to PCIe 2.0 x16. The AMD card also supports DirectX 12 Ultimate (12_2), Vulkan 1.4, and OpenGL 4.6. The Quadro supports DirectX 12 (11_0), Vulkan 1.2.175, and OpenGL 4.6. The RX 6600S is the newer part by nearly a decade: it launched on January 3, 2022, while the Quadro K5000 launched on August 16, 2012.

Where Each One Wins

The RX 6600S wins in every measurable category where direct comparison exists, but the specific strengths suggest different use cases. In OpenCL compute, the AMD card is dominant, and its FP32 and FP16 throughput figures make it suitable for general-purpose GPU compute, machine learning inference, and any workload that can leverage RDNA 2's execution units. The 28 ray tracing cores also give it a path into hardware-accelerated ray tracing, which the Quadro cannot attempt.

The Quadro K5000, despite its age, retains some relevance in specific niches. Its 256-bit memory bus and GDDR5 configuration, while slower in aggregate bandwidth, still provide a wide path for certain memory-bound operations. The higher TMU count (128 versus 112) suggests it may handle texture-heavy workloads with more parallelism, though its lower texture rate of 90.37 GTexel/s versus 224.0 GTexel/s undercuts that advantage. The Quadro also has a full PCIe 2.0 x16 interface, which in older systems may be a better match than the RX 6600S's PCIe 4.0 x8 connection.

For professional visualization work, the Quadro K5000's Kepler architecture was designed for CAD and DCC applications, and its 2.169 TFLOPS FP32 performance was respectable in 2012. But against the RX 6600S's 7.168 TFLOPS, that advantage is historical, not practical. The Quadro also supports Vulkan 1.2.175, which is functional but older than the RX 6600S's Vulkan 1.4. The RX 6600S's DirectX 12 Ultimate support is a clear win for modern gaming and DX12-based applications, while the Quadro's DirectX 12 (11_0) is a partial implementation that may lack newer features.

FAQ

Q: Which card has higher FP32 compute performance?

A: The AMD Radeon RX 6600S delivers 7.168 TFLOPS of FP32 performance, compared to the NVIDIA Quadro K5000's 2.169 TFLOPS. The RX 6600S is more than three times faster in this metric.

Q: How do the memory bandwidth figures compare?

A: The RX 6600S achieves 224.0 GB/s using GDDR6 on a 128-bit bus, while the Quadro K5000 reaches 172.8 GB/s using GDDR5 on a 256-bit bus. The AMD card has higher bandwidth despite the narrower bus.

Q: Does the Quadro K5000 support ray tracing?

A: No. The Quadro K5000 has no ray tracing cores. The RX 6600S includes 28 dedicated ray tracing cores, which is a feature the Kepler-based Quadro cannot offer.

Q: What is the average benchmark score for each card?

A: The RX 6600S has an average benchmark score of 10,629 points, while the Quadro K5000 averages 9,637 points. The RX 6600S sits at the 49th percentile of all GPUs, and the Quadro sits at the 46th percentile.

Q: Which API versions does each card support?

A: The RX 6600S supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Quadro K5000 supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175.

Q: What are the power requirements for each card?

A: The RX 6600S has an 80 W TDP and requires no power connectors. The Quadro K5000 has a 122 W TDP, requires a single 6-pin power connector, and has a suggested power supply rating of 300 W.

The Verdict

The data is unambiguous. The AMD Radeon RX 6600S outperforms the NVIDIA Quadro K5000 in the only directly comparable benchmark by 481.8%, and it holds a higher average benchmark score, a higher percentile ranking, and a more modern feature set across every architectural category. The RX 6600S offers more than three times the FP32 throughput, higher memory bandwidth, ray tracing support, and newer API compatibility, all while drawing less power and occupying a smaller physical footprint. The Quadro K5000 was a capable professional card in its era, but its 28 nm Kepler architecture and 2012 release date place it firmly in a previous generation.

For anyone choosing between these two cards today, the RX 6600S is the clear pick for compute workloads, modern graphics APIs, and any application that can leverage its FP16 or ray tracing capabilities. The Quadro K5000 might still serve in legacy systems that require its specific display outputs (2x DVI and 2x DisplayPort 1.2) or its PCIe 2.0 x16 interface, but the performance gap is too wide to recommend it for any compute-intensive task. The recorded data shows one winner, and it is not close.