AMD Radeon 660M vs NVIDIA RTX PRO 6000 Blackwell Comparison

The Verdict

The data presents a stark contrast: the NVIDIA RTX PRO 6000 Blackwell and the AMD Radeon 660M occupy entirely different tiers of the graphics hierarchy. The RTX PRO 6000 Blackwell, a 600 W professional workstation card built on Blackwell 2.0, is designed for maximum compute and rendering throughput. The Radeon 660M, a 40 W integrated graphics processor from the Rembrandt mobile generation, serves as a basic IGP for portable devices. There is no shared benchmark workload between the two in the database, so direct score comparison is not possible. Instead, the recorded data reveals their positions through individual performance percentiles and nearest rivals. The RTX PRO 6000 Blackwell sits at the 59th percentile of all GPUs, while the Radeon 660M sits at the 55th percentile. Their respective nearest rival lists show the NVIDIA card trading blows with desktop and mobile parts like the AMD Radeon PRO W7500 and the GeForce RTX 5090 D V2, whereas the AMD IGP is bracketed by the NVIDIA RTX A2000 Mobile and the AMD Radeon RX 570X. The verdict is simple: the RTX PRO 6000 Blackwell is for professional workloads demanding massive memory, bandwidth, and compute throughput. The Radeon 660M is for lightweight, power-constrained mobile systems where basic graphics acceleration suffices. Neither is a substitute for the other.

Architecture Differences

The architectural gap is fundamental. The NVIDIA RTX PRO 6000 Blackwell uses the GB202 chip built on a 5 nm TSMC process, with 92,200 million transistors on a 750 mm² die. Its transistor density is 122.9 million per mm². The AMD Radeon 660M uses the Rembrandt chip on a 6 nm TSMC process, with 13,100 million transistors on a 208 mm² die, yielding a density of 63.0 million per mm². The NVIDIA part is built on Blackwell 2.0, a dedicated discrete GPU architecture, while the AMD part is RDNA 2.0, an integrated graphics architecture from the Navi II IGP generation. The RTX PRO 6000 Blackwell features 24,064 shading units, 752 TMUs, 192 ROPs, 188 RT cores, and 752 tensor cores. The Radeon 660M has 384 shading units, 24 TMUs, 16 ROPs, and 6 RT cores; it has no tensor cores. The NVIDIA card's memory subsystem is a dedicated 96 GB of GDDR7 on a 512-bit bus, delivering 1.79 TB/s of bandwidth. The AMD IGP uses system shared memory, with bandwidth described as system dependent. The clock behavior also differs: the NVIDIA card has a base clock of 1590 MHz and a boost of 2617 MHz, while the AMD part runs at 1500 MHz base and 1900 MHz boost. The NVIDIA card uses a 1x 16-pin power connector and requires a 1000 W suggested PSU, whereas the Radeon 660M has no power connectors and is an IGP. The bus interface differs as well: PCIe 5.0 x16 for NVIDIA versus PCIe 4.0 x8 for AMD.

Head-to-Head Benchmarks

The database contains no shared benchmark entries for these two products. The RTX PRO 6000 Blackwell has one recorded test, 3dmark_3dmark_steel_nomad_dx12, with a score of 16,408. The Radeon 660M has two recorded tests: geekbench_opencl at 12,876 and geekbench_vulkan at 14,748. Its average benchmark score is 13,812. Because these tests do not overlap, no direct head-to-head comparison can be made from the recorded data. However, the nearest rival lists provide context. The RTX PRO 6000 Blackwell's average score of 16,408 is essentially tied with the AMD Radeon PRO W7500 (16,415, delta 0%) and the AMD Radeon RX 5700 XT (16,361, delta 0.3%). It is 0.6% behind the NVIDIA GeForce RTX 5090 D V2 (16,504). The Radeon 660M's average score of 13,812 is within 0.1% of the NVIDIA RTX A2000 Mobile (13,821), 0.4% behind the AMD Radeon RX 570X (13,871), 0.5% ahead of the AMD Radeon RX 7900 XT (13,745), and 1.5% behind the NVIDIA Tesla K10 (14,029). These deltas show that both parts sit in competitive clusters, but the clusters are far apart in absolute performance. The NVIDIA card's single score is roughly 19% higher than the AMD IGP's average score, a gap that reflects the enormous difference in compute resources: 126.0 TFLOPS FP32 versus 1,459.2 GFLOPS FP32.

Specification Differences

The recorded specifications diverge on nearly every measurable field. The NVIDIA RTX PRO 6000 Blackwell has 96 GB of GDDR7 memory, while the AMD Radeon 660M uses system shared memory. The NVIDIA card's memory bus is 512-bit, versus system shared for AMD. Bandwidth is 1.79 TB/s for NVIDIA and system dependent for AMD. The NVIDIA card has 24,064 shading units, 752 TMUs, and 192 ROPs; the AMD part has 384 shading units, 24 TMUs, and 16 ROPs. RT core counts are 188 versus 6. Tensor cores exist only on NVIDIA at 752. Pixel rate is 502.5 GPixel/s for NVIDIA versus 30.40 GPixel/s for AMD. Texture rate is 1,968.0 GTexel/s versus 45.60 GTexel/s. FP32 performance is 126.0 TFLOPS versus 1,459.2 GFLOPS. FP16 is 126.0 TFLOPS (1:1) for NVIDIA versus 2.918 TFLOPS (2:1) for AMD. Power draw is 600 W versus 40 W. The NVIDIA card is dual-slot with a 1x 16-pin connector and a 1000 W suggested PSU; the AMD part is an IGP with no connectors and no suggested PSU. Bus interface is PCIe 5.0 x16 versus PCIe 4.0 x8. Display outputs are 4x DisplayPort 2.1b for NVIDIA versus portable device dependent for AMD. The NVIDIA card measures 304 mm by 137 mm by 40 mm; the AMD part has no recorded dimensions. Production status is Active for NVIDIA and End-of-life for AMD. Release dates differ: March 17, 2025 versus January 3, 2022. The NVIDIA card has a launch MSRP of 8,565 USD, while the AMD part has no recorded MSRP. Predecessors are Workstation Ada for NVIDIA and Vega II IGP for AMD; the AMD successor is Navi III IGP. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The process node is 5 nm versus 6 nm, with transistor counts of 92,200 million versus 13,100 million and die sizes of 750 mm² versus 208 mm².

FAQ

Q: Which GPU has more raw compute power?

A: The NVIDIA RTX PRO 6000 Blackwell delivers 126.0 TFLOPS FP32, while the AMD Radeon 660M delivers 1,459.2 GFLOPS FP32. The NVIDIA card is approximately 86 times higher in FP32 throughput.

Q: What is the memory configuration difference?

A: The NVIDIA card has 96 GB of GDDR7 on a 512-bit bus with 1.79 TB/s bandwidth. The AMD Radeon 660M uses system shared memory with system dependent bandwidth.

Q: Are these GPUs comparable in power consumption?

A: No. The NVIDIA RTX PRO 6000 Blackwell has a TDP of 600 W and requires a 1000 W suggested PSU. The AMD Radeon 660M has a TDP of 40 W and no power connectors.

Q: Which product is still in production?

A: The NVIDIA RTX PRO 6000 Blackwell has an Active production status. The AMD Radeon 660M is End-of-life.

Q: How do their benchmark scores compare to similar products?

A: The NVIDIA card scores 16,408 in 3dmark_steel_nomad_dx12, placing it within 0.6% of the GeForce RTX 5090 D V2 and within 0.4% of the AMD Radeon RX 5700 XT. The AMD IGP averages 13,812 across geekbench_opencl and geekbench_vulkan, sitting within 0.5% of the AMD Radeon RX 7900 XT and 0.1% of the NVIDIA RTX A2000 Mobile.

Q: Do both support the same graphics APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The NVIDIA RTX PRO 6000 Blackwell wins in every category where raw throughput and dedicated resources matter. Its 96 GB of GDDR7 memory and 1.79 TB/s bandwidth are unmatched by the system shared memory of the AMD part. Its 126.0 TFLOPS FP32 and 126.0 TFLOPS FP16 (1:1) make it suitable for heavy compute tasks, while the AMD part's 1,459.2 GFLOPS FP32 and 2.918 TFLOPS FP16 (2:1) are orders of magnitude lower. The NVIDIA card's 188 RT cores and 752 tensor cores provide hardware acceleration for ray tracing and AI workloads; the AMD part has only 6 RT cores and no tensor cores. The NVIDIA card's pixel rate of 502.5 GPixel/s and texture rate of 1,968.0 GTexel/s dwarf the AMD part's 30.40 GPixel/s and 45.60 GTexel/s. The NVIDIA card is the clear winner for professional rendering, simulation, large model inference, and any workload that can use its 512-bit memory bus and massive compute throughput.

The AMD Radeon 660M wins in the domain of power efficiency and integration. Its 40 W TDP means it can be embedded in a mobile processor without a discrete power connector or a suggested PSU. It is an IGP, so it requires no slot space and has no dimensions to occupy. Its PCIe 4.0 x8 interface is sufficient for its bandwidth needs, and its system shared memory model eliminates the need for dedicated VRAM. For a portable device where battery life, thermals, and physical space are the primary constraints, the Radeon 660M is the appropriate choice. It is also the only one of the two with a recorded geekbench_vulkan score of 14,748, which indicates it can handle basic graphics acceleration for everyday mobile use. The NVIDIA card, by contrast, requires a dual-slot 304 mm by 137 mm by 40 mm footprint and a 1000 W PSU, making it unsuitable for any integrated or low-power application. In short, the RTX PRO 6000 Blackwell wins on absolute performance and feature set, while the Radeon 660M wins on power envelope and integration suitability. There is no workload where the two compete directly.