AMD Radeon RX 6600 LE vs NVIDIA RTX PRO 5000 Blackwell Comparison

Head-to-Head Benchmarks

The recorded head-to-head data contains two compute-level comparisons, and in both cases the NVIDIA RTX PRO 5000 Blackwell takes a commanding lead. In Geekbench OpenCL, the NVIDIA card scores 254116 against the AMD Radeon RX 6600 LE's 69229, a delta of 267.1%. In Geekbench Vulkan, the NVIDIA card scores 282631 against 72428, a delta of 290.2%. These are not marginal wins; they represent a multi-generational and multi-class gap in raw throughput.

The OpenCL result is particularly telling because both GPUs support the same API tier, OpenGL 4.6, and Vulkan 1.4, so the difference is not a feature gap but a computational scale gap. The NVIDIA card delivers roughly 3.7 times the OpenCL score of the AMD card. In Vulkan, the gap widens slightly to roughly 3.9 times. The pattern suggests that the NVIDIA architecture scales more efficiently when the workload is dispatched through a modern graphics API, and the sheer size of the chip overwhelms the smaller AMD part.

Looking at the average benchmark scores across all recorded tests, the NVIDIA RTX PRO 5000 Blackwell sits at 182109, while the AMD Radeon RX 6600 LE sits at 70829. That is an absolute difference of 111280 points, or roughly 157% higher average performance. The percentile ranking reinforces the divide: the NVIDIA card sits in the 98th percentile of all GPUs in the database, while the AMD card sits in the 91st percentile. Both are above average, but the NVIDIA card is near the top of the entire database, whereas the AMD card is merely solidly above the middle.

The nearest rivals for the NVIDIA card help contextualize its position. The NVIDIA A100 SXM4 80 GB averages 183725, which is 0.9% higher than the RTX PRO 5000 Blackwell. The NVIDIA RTX 5000 Ada Generation averages 184664, 1.4% higher. The GeForce RTX 4090 D averages 178050, which is 2.3% lower. The A100 SXM4 40 GB averages 187147, 2.7% higher. So the RTX PRO 5000 Blackwell sits in a tight cluster of top-tier NVIDIA accelerators, all within roughly 3% of each other. The AMD Radeon RX 6600 LE, by contrast, sits near the NVIDIA RTX A3000 Mobile (70140, 1% lower), the NVIDIA Quadro P6000 (69986, 1.2% lower), the AMD Radeon RX 6650M (71768, 1.3% higher), and the AMD Radeon Pro WX 8200 (69870, 1.4% lower). The AMD card is competitive with older or mobile prosumer GPUs, but it is nowhere near the class of the NVIDIA flagship.

One notable asymmetry: the AMD card has no entry in the 3DMark Steel Nomad DX12 test, while the NVIDIA card scores 9579.5 in that workload. This means the only recorded cross-GPU tests are the two Geekbench compute tests, and the NVIDIA card wins both. The absence of a 3DMark result for the AMD card limits direct gaming-performance comparison, but the compute gap is substantial enough that it dominates the analysis.

The Verdict

The data points to two different product categories. The NVIDIA RTX PRO 5000 Blackwell is a top-tier workstation and compute GPU, ranking in the 98th percentile of all GPUs, with an average score of 182109. The AMD Radeon RX 6600 LE is a mid-range consumer card in the 91st percentile, with an average score of 70829. Any buyer choosing between these two based on raw compute performance should pick the NVIDIA card without hesitation. It wins both recorded head-to-head tests, and its average score is more than 2.5 times higher.

However, the verdict is not purely about speed. The NVIDIA card draws 300 W, requires a 700 W suggested PSU, and uses a 16-pin power connector. The AMD card draws 132 W, requires a 300 W suggested PSU, and uses a standard 8-pin connector. For a system with limited power delivery or a constrained chassis, the AMD card is far easier to integrate. The AMD card is also shorter: 190 mm versus 267 mm. In a small form factor build, that length difference matters.

The AMD card is not a workstation part. It has no tensor cores, while the NVIDIA card has 440. It has 28 ray tracing cores, while the NVIDIA card has 110. Its FP32 throughput is 8.942 TFLOPS versus 66.94 TFLOPS for the NVIDIA card. These are not comparable specifications; they reflect different design goals. The NVIDIA card is built for compute density, the AMD card for efficient mainstream gaming.

The verdict from the database: if the workload is compute-heavy, rendering, or AI-adjacent, the NVIDIA RTX PRO 5000 Blackwell is the only rational choice. If the workload is light gaming, basic 1080p rendering, or a low-power build, the AMD card is the practical option, but it will trail the NVIDIA card by a factor of three to four in compute benchmarks. There is no scenario in the recorded data where the AMD card wins a performance comparison.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA RTX PRO 5000 Blackwell has an average benchmark score of 182109, while the AMD Radeon RX 6600 LE has 70829.

Q: How much faster is the NVIDIA card in Geekbench Vulkan?

A: The NVIDIA card scores 282631 versus 72428 for the AMD card, a delta of 290.2%.

Q: Does the AMD Radeon RX 6600 LE support ray tracing?

A: Yes, it has 28 ray tracing cores, but the NVIDIA RTX PRO 5000 Blackwell has 110.

Q: What is the memory configuration of each card?

A: The NVIDIA card has 48 GB of GDDR7 on a 384-bit bus with 1.34 TB/s bandwidth. The AMD card has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth.

Q: Which card ranks higher in the database's percentile system?

A: The NVIDIA RTX PRO 5000 Blackwell is in the 98th percentile of all GPUs, while the AMD Radeon RX 6600 LE is in the 91st percentile.

Q: Are there any benchmark tests where the AMD card wins?

A: No. In the recorded head-to-head tests, the NVIDIA card wins both Geekbench OpenCL and Geekbench Vulkan. The AMD card has no 3DMark Steel Nomad DX12 result.

Specification Differences

The two cards differ in almost every recorded specification category. The NVIDIA RTX PRO 5000 Blackwell uses a GB202 chip on a 5 nm process with 92,200 million transistors and a die size of 750 mm². The AMD Radeon RX 6600 LE uses a Navi 23 chip on a 7 nm process with 11,060 million transistors and a die size of 237 mm². The transistor density also differs: 122.9M per mm² for the NVIDIA card versus 46.7M per mm² for the AMD card.

Clock speeds are closer than one might expect. The NVIDIA card has a base clock of 1740 MHz and a boost of 2377 MHz. The AMD card has a base of 1626 MHz, a game clock of 2045 MHz, and a boost of 2495 MHz. The AMD card actually boosts higher, but the NVIDIA card has far more compute units behind its clocks.

Memory is a major differentiator. The NVIDIA card has 48 GB of GDDR7 with a 384-bit bus and 1.34 TB/s bandwidth. The AMD card has 8 GB of GDDR6 with a 128-bit bus and 224.0 GB/s bandwidth. The NVIDIA card has 14080 shading units, 440 TMUs, and 160 ROPs. The AMD card has 1792 shading units, 112 TMUs, and 64 ROPs. The NVIDIA card has 110 ray tracing cores and 440 tensor cores. The AMD card has 28 ray tracing cores and no tensor cores.

Pixel and texture rates follow the same pattern: the NVIDIA card achieves 380.3 GPixel/s and 1,045.9 GTexel/s, while the AMD card achieves 159.7 GPixel/s and 279.4 GTexel/s. FP32 throughput is 66.94 TFLOPS for the NVIDIA card versus 8.942 TFLOPS for the AMD card. FP16 throughput is 66.94 TFLOPS for the NVIDIA card (1:1 ratio) versus 17.88 TFLOPS for the AMD card (2:1 ratio).

Power and physical specifications differ sharply. The NVIDIA card has a TDP of 300 W, a 700 W suggested PSU, and a single 16-pin connector. The AMD card has a TDP of 132 W, a 300 W suggested PSU, and a single 8-pin connector. Both are dual-slot, but the NVIDIA card is 267 mm long while the AMD card is 190 mm. The NVIDIA card uses PCIe 5.0 x16 while the AMD card uses PCIe 4.0 x8. Display outputs also differ: the NVIDIA card has 4x DisplayPort 2.1b, while the AMD card has 1x HDMI 2.1 and 3x DisplayPort 1.4a.

The NVIDIA card has a launch MSRP of 5,099 USD. The AMD card has no recorded launch MSRP.

Architecture Differences

The architectural split is fundamental. The NVIDIA RTX PRO 5000 Blackwell is built on the Blackwell 2.0 architecture, part of the Blackwell PRO W (x000) generation, and uses the GB202 chip. The AMD Radeon RX 6600 LE is built on RDNA 2.0, part of the Navi II (RX 6000) generation, and uses the Navi 23 chip. The process nodes differ: 5 nm for NVIDIA, 7 nm for AMD, both fabricated by TSMC.

The NVIDIA card is designed around massive parallel compute. It has 440 tensor cores, which the AMD card lacks entirely. Tensor cores are critical for AI and machine learning workloads, and their absence on the AMD card means it cannot accelerate those tasks in the same way. The NVIDIA card also has 110 ray tracing cores versus 28 on the AMD card, giving it a 3.9 times advantage in dedicated ray tracing hardware.

The memory architecture is also a generational leap. The NVIDIA card uses GDDR7, the AMD card uses GDDR6. The NVIDIA card has a 384-bit memory bus versus 128-bit on the AMD card. The bandwidth difference is enormous: 1.34 TB/s versus 224.0 GB/s. For memory-bound workloads, this is a decisive factor.

The API support is identical: both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. So there is no software feature advantage for either card at the API level. The difference is purely in hardware execution resources.

Chip complexity tells the story. The NVIDIA GB202 has 92,200 million transistors on a 750 mm² die. The AMD Navi 23 has 11,060 million transistors on a 237 mm² die. That is an 8.3 times difference in transistor count and a 3.2 times difference in die area. The density advantage (122.9M per mm² versus 46.7M per mm²) reflects the newer 5 nm process node and the denser design.

The FP16 ratio also differs meaningfully. The NVIDIA card maintains a 1:1 ratio between FP16 and FP32, meaning it can process FP16 at the same rate as FP32 throughput. The AMD card has a 2:1 ratio, meaning FP16 is only half the rate of FP32. For workloads that rely heavily on FP16 compute, the NVIDIA card has a structural efficiency advantage.

Where Each One Wins

The NVIDIA RTX PRO 5000 Blackwell wins every recorded performance category. It wins Geekbench OpenCL by 267.1% and Geekbench Vulkan by 290.2%. It wins in average benchmark score by 111280 points. It wins in FP32 throughput, FP16 throughput, pixel rate, texture rate, memory bandwidth, memory capacity, ray tracing core count, and tensor core count. It is in the 98th percentile versus the 91st percentile for the AMD card.

The AMD Radeon RX 6600 LE wins only in efficiency-oriented categories that are not performance metrics. It has a lower TDP of 132 W versus 300 W. It requires a 300 W suggested PSU versus 700 W. It uses a standard 8-pin connector versus a 16-pin connector. It is shorter at 190 mm versus 267 mm. It has a higher boost clock of 2495 MHz versus 2377 MHz, but that does not translate into a benchmark win.

For a workstation user running compute, rendering, or AI workloads, the NVIDIA card is the clear choice. The data shows a 2.5 to 3.9 times performance advantage across every test type. The 48 GB of GDDR7 memory and 440 tensor cores make it suitable for large models and complex simulations. The AMD card simply cannot compete in these domains.

For a user building a low-power, compact gaming or media system, the AMD card has practical merits. The 132 W TDP means a smaller PSU is sufficient. The 190 mm length fits in smaller cases. The 8-pin connector is universally compatible. But the performance ceiling is low: 8.942 TFLOPS FP32 and 224.0 GB/s bandwidth limit what the card can do.

The database records no scenario where the AMD card wins a performance benchmark. The division is absolute. Buyers who need compute density should choose the NVIDIA RTX PRO 5000 Blackwell. Buyers who need a low-power, compact GPU with modest performance and no tensor core requirements may choose the AMD Radeon RX 6600 LE, but they will accept a 267% to 290% performance deficit in the recorded tests.