AMD Radeon Pro Vega II vs AMD Radeon PRO W6600 Comparison

The Verdict

The data splits this pairing into two very different use cases. The AMD Radeon Pro Vega II is the clear performance leader, winning all three head-to-head benchmark comparisons with margins between 27% and 38.4%. Its average benchmark score of 109,617 places it in the 94th percentile of all GPUs, while the Radeon PRO W6600 sits slightly lower at 81,995 average and the 92nd percentile.

Choose the Radeon Pro Vega II if your work is dominated by raw compute throughput and you need massive memory capacity. It delivers 32 GB of HBM2 with 825.3 GB/s bandwidth, which is a generational leap over the W6600's 8 GB GDDR6 at 224.0 GB/s. The Vega II also posts significantly higher FP32 performance at 14.09 TFLOPS versus 9.247 TFLOPS.

Choose the Radeon PRO W6600 if you prioritize efficiency, modern features, and physical practicality. It draws only 100 W TDP versus 475 W, requires a 300 W suggested PSU instead of 850 W, and fits in a single slot compared to the Vega II's quad-slot design. The W6600 also brings hardware ray tracing with 28 RT cores and supports DirectX 12 Ultimate, which the Vega II cannot match.

The Vega II is end-of-life and was released in 2019; the W6600 followed in 2021 and is also end-of-life. Neither card is current, but the data shows they serve different workloads. The Vega II is a compute monster. The W6600 is a modern, efficient workstation card. Pick based on whether raw performance or feature set matters more for your specific applications.

Architecture Differences

The two cards come from entirely different architectural generations. The Radeon Pro Vega II uses the Vega 20 chip built on GCN 5.1 architecture, while the Radeon PRO W6600 uses the Navi 23 chip on RDNA 2.0. Both are fabricated on TSMC's 7 nm process, but the transistor counts and die sizes differ meaningfully.

The Vega II packs 13,230 million transistors across a 331 mm² die, resulting in a transistor density of 40.0M per mm². The W6600 has 11,060 million transistors on a smaller 237 mm² die, achieving a higher density of 46.7M per mm². This density advantage reflects the newer RDNA 2.0 design philosophy.

Compute resources are substantially different. The Vega II has 4,096 shading units, 256 texture mapping units, and 64 ROPs. The W6600 has 1,792 shading units, 112 TMUs, and 64 ROPs. The Vega II's raw shading unit count is more than double the W6600's, which explains its compute advantage. However, the W6600 introduces 28 ray accelerators (RT cores) that the Vega II lacks entirely.

Memory architecture is where the cards diverge most dramatically. The Vega II uses 32 GB of HBM2 on a 4096-bit bus, delivering 825.3 GB/s bandwidth. The W6600 uses 8 GB of GDDR6 on a 128-bit bus, capping at 224.0 GB/s. The Vega II's memory bandwidth is over 3.6 times higher, which is critical for large datasets and high-resolution textures.

Clock speeds favor the W6600. Its base clock of 2331 MHz and boost of 2580 MHz are far above the Vega II's 1574 MHz base and 1720 MHz boost. The W6600's memory runs at 1750 MHz (14 Gbps effective) versus the Vega II's 806 MHz (1612 Mbps effective). Despite the clock disadvantage, the Vega II's massive memory bus and shading unit count carry its performance.

The Vega II uses the Apple MPX bus interface, while the W6600 uses PCIe 4.0 x8. Display outputs also differ: the Vega II offers 1x HDMI 2.0b and 4x Thunderbolt, while the W6600 provides 4x DisplayPort 1.4a. API support favors the W6600 with DirectX 12 Ultimate (12_2) and Vulkan 1.4, versus the Vega II's DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6.

Where Each One Wins

The Radeon Pro Vega II wins decisively in raw compute benchmarks. In Geekbench Metal, it scores 130,183 versus 94,042, a 38.4% advantage. In OpenCL, the gap is 34.7% (99,048 versus 73,514). In Vulkan, the lead narrows to 27% (99,621 versus 78,428). Every single test shows the Vega II ahead, and the margins are substantial.

The Vega II's win condition is memory-heavy workloads. Its 32 GB HBM2 pool with 825.3 GB/s bandwidth is the standout specification. For tasks like large 3D scenes, high-resolution video editing, or scientific visualization that require holding massive datasets in VRAM, the Vega II's capacity and bandwidth are transformative. The 4096-bit bus is a legacy feature that modern cards rarely match.

The Radeon PRO W6600 wins on efficiency and modern features. Its 100 W TDP is less than a quarter of the Vega II's 475 W. The suggested PSU drops from 850 W to 300 W. Physical footprint shrinks from quad-slot to single-slot. For workstations with limited space or power budgets, these practical advantages matter as much as raw performance.

The W6600 also wins on architectural modernity. Its RDNA 2.0 design supports hardware ray tracing, which the GCN 5.1 Vega II cannot do. DirectX 12 Ultimate support means better compatibility with modern applications that leverage DirectX 12_2 features. Vulkan 1.4 support is also a step ahead of the Vega II's Vulkan 1.3.

For gaming or GPU-accelerated rendering that uses ray tracing, the W6600 is the only choice between these two. For compute-heavy tasks that scale with shading units and memory bandwidth, the Vega II dominates. The benchmark data is unambiguous: the Vega II wins every performance test, but the W6600 wins on practical deployment and feature support.

FAQ

Q: Which card has better overall benchmark performance?

A: The Radeon Pro Vega II wins all three head-to-head benchmarks. Its average benchmark score is 109,617 versus 81,995 for the Radeon PRO W6600, a difference of roughly 34%. The Vega II also sits in the 94th percentile of all GPUs compared to the W6600's 92nd percentile.

Q: How large is the memory capacity difference?

A: The Vega II has 32 GB of HBM2 memory, which is four times the W6600's 8 GB of GDDR6. The bandwidth gap is even wider: 825.3 GB/s versus 224.0 GB/s. This makes the Vega II dramatically better suited for workloads that need to store large datasets in VRAM.

Q: Does the Radeon PRO W6600 support ray tracing?

A: Yes. The W6600 includes 28 ray accelerators (RT cores) and supports DirectX 12 Ultimate (12_2). The Radeon Pro Vega II has no RT cores and only supports DirectX 12 (12_1), so it cannot perform hardware-accelerated ray tracing.

Q: What are the power requirements for each card?

A: The Vega II has a 475 W TDP and requires an 850 W suggested PSU. The W6600 has a 100 W TDP and requires a 300 W suggested PSU. The W6600 also uses a single 6-pin power connector, while the Vega II lists no specific connector (it uses Apple MPX bus interface).

Q: Which card is physically smaller?

A: The W6600 is a single-slot card with a length of 241 mm (9.5 inches). The Vega II is a quad-slot card with no length specified. For most workstation chassis, the W6600 is far easier to install and leaves room for other components.

Q: How do these cards compare to their nearest rivals?

A: The Vega II's closest rival is the AMD Radeon PRO W7900, which scores 110,725 (1% higher). The W6600's nearest rival is the AMD Radeon Pro Vega 64X, scoring 80,959 (1.3% lower). Both cards are competitive within their respective performance tiers.

Head-to-Head Benchmarks

The Geekbench Metal test shows the largest gap between these two cards. The Vega II scores 130,183, which is 38.4% higher than the W6600's 94,042. This is the biggest win in either direction across all three benchmarks. Metal performance is critical for macOS applications, and the Vega II's advantage here is substantial.

In Geekbench OpenCL, the Vega II scores 99,048 versus 73,514 for the W6600, a 34.7% difference. OpenCL is commonly used for compute workloads across various platforms, and the Vega II's 4,096 shading units provide a massive parallel throughput advantage. The W6600's 1,792 shading units simply cannot match this compute density.

The Vulkan benchmark shows the narrowest margin, but the Vega II still wins by 27%. Its score of 99,621 compares to 78,428 for the W6600. Vulkan is increasingly relevant for cross-platform graphics and compute, and while the W6600's RDNA 2.0 architecture is more modern, the Vega II's raw resources overcome the architectural disadvantage.

The average benchmark scores reinforce these head-to-head results. The Vega II averages 109,617 across all tests, placing it in the 94th percentile. The W6600 averages 81,995, in the 92nd percentile. For context, the Vega II sits between the AMD Radeon PRO W7900 (110,725, 1% higher) and the AMD Radeon Pro W6600X (107,342, 2.1% lower). The W6600 sits between the AMD Radeon Pro Vega 64X (80,959, 1.3% lower) and NVIDIA GeForce RTX 5090 (79,842, 2.7% lower).

The consistency of the Vega II's wins is notable. It doesn't just win one API or workload; it wins all three by margins between 27% and 38.4%. The W6600's closest performance is in Vulkan, where the architectural modernity of RDNA 2.0 partially compensates for the compute resource deficit. But even there, the Vega II's 27% lead is decisive.

The FP32 and FP16 outputs tell a similar story. The Vega II delivers 14.09 TFLOPS FP32 and 28.18 TFLOPS FP16 (2:1). The W6600 delivers 9.247 TFLOPS FP32 and 18.49 TFLOPS FP16 (2:1). The Vega II is roughly 52% ahead in FP32 and 52% ahead in FP16, consistent with its shading unit advantage. Pixel rate favors the W6600 at 165.1 GPixel/s versus 110.1 GPixel/s, but texture rate favors the Vega II at 440.3 GTexel/s versus 289.0 GTexel/s.

Specification Differences

The two cards differ in nearly every core specification. The Vega II uses the Vega 20 chip with GCN 5.1 architecture, while the W6600 uses Navi 23 with RDNA 2.0. Both are 7 nm TSMC parts, but the Vega II has 13,230 million transistors on a 331 mm² die, compared to 11,060 million on 237 mm² for the W6600. Transistor density is 40.0M/mm² versus 46.7M/mm².

Memory is the most significant divergence. The Vega II has 32 GB of HBM2 on a 4096-bit bus with 825.3 GB/s bandwidth. The W6600 has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. Memory clocks also differ: the Vega II runs at 806 MHz (1612 Mbps effective), while the W6600 runs at 1750 MHz (14 Gbps effective). The Vega II's wider bus more than compensates for its lower clock speed.

Compute resources differ dramatically. The Vega II has 4,096 shading units, 256 TMUs, and 64 ROPs. The W6600 has 1,792 shading units, 112 TMUs, and 64 ROPs. The W6600 adds 28 RT cores, which the Vega II lacks entirely. Neither card has tensor cores. Clock speeds favor the W6600: 2331 MHz base and 2580 MHz boost versus 1574 MHz base and 1720 MHz boost for the Vega II.

Performance rates reflect these architectural differences. The Vega II achieves 14.09 TFLOPS FP32, 28.18 TFLOPS FP16, 110.1 GPixel/s pixel rate, and 440.3 GTexel/s texture rate. The W6600 achieves 9.247 TFLOPS FP32, 18.49 TFLOPS FP16, 165.1 GPixel/s pixel rate, and 289.0 GTexel/s texture rate. The ROP count is identical at 64, but the W6600's higher clocks give it the pixel rate advantage.

Power and physical specifications are polar opposites. The Vega II has a 475 W TDP, is quad-slot, and requires an 850 W suggested PSU. The W6600 has a 100 W TDP, is single-slot, uses a 1x 6-pin power connector, and requires a 300 W suggested PSU. The Vega II uses the Apple MPX bus interface and offers 1x HDMI 2.0b plus 4x Thunderbolt outputs. The W6600 uses PCIe 4.0 x8 and offers 4x DisplayPort 1.4a outputs. The W6600 has a specified length of 241 mm (9.5 inches); the Vega II's length is not specified.

API support favors the W6600. It supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega II supports DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6. The Vega II was released in 2019 with a launch MSRP of 2,199 USD. The W6600 was released in 2021 with a launch MSRP of 649 USD. Both are end-of-life products, and the W6600 lists the Radeon Pro Vega as its predecessor.