AMD Radeon Pro Vega 64X vs AMD Radeon PRO W6800 Comparison

Head-to-Head Benchmarks

The benchmark data shows a decisive performance gap between these two professional graphics cards. In the Geekbench Metal test, the AMD Radeon PRO W6800 scores 174,420 points against 83,450 for the AMD Radeon Pro Vega 64X. That is a 109% advantage for the W6800, meaning the newer card more than doubles the older card's Metal performance. The OpenCL results tell a similar story, with the W6800 posting 121,808 points versus 78,467 for the Vega 64X, a 55.2% lead.

Looking at the broader database context, the W6800 sits in the 96th percentile of all GPUs, while the Vega 64X ranks in the 92nd percentile. That percentile gap matters: the W6800 is near the top of the entire GPU landscape, while the Vega 64X is merely above average. The average benchmark score for the W6800 is 135,396, which places it just 0.1% ahead of the NVIDIA A10M and 0.1% ahead of the NVIDIA RTX 4000 Ada Generation. It also edges out the AMD Radeon Pro W6800X Duo by 0.3% and the AMD Radeon PRO V620 by 0.8%. The Vega 64X, with an average score of 80,959, sits 1.3% behind the AMD Radeon PRO W6600 and 1.4% ahead of the NVIDIA GeForce RTX 5090 in the database rankings. It also leads the NVIDIA Tesla P100 PCIe 16 GB by 1.7% and the Tesla P100 PCIe 12 GB by 2%.

The head-to-head record is clear: the W6800 wins both available benchmark comparisons, with zero losses. The largest margin is in Metal, where the 109% delta dwarfs the 55.2% OpenCL gap. This suggests the architectural shift between generations delivered the most benefit in Apple's Metal API, which is relevant for Mac ecosystem workloads. The OpenCL result, while still a commanding win, shows a narrower gap that may reflect API-level overhead or driver maturity differences.

Architecture Differences

The two cards come from completely different architectural generations. The W6800 uses the Navi 21 chip built on RDNA 2.0 architecture, fabricated on a 7 nm process at TSMC. The Vega 64X uses the Vega 10 chip with GCN 5.0 architecture, built on a 14 nm process at GlobalFoundries. That process shrink is significant: 7 nm versus 14 nm allows the W6800 to pack 26,800 million transistors into a 520 mm² die, while the Vega 64X fits only 12,500 million transistors into a 495 mm² die. Transistor density tells the story clearly: 51.5 million transistors per mm² for the W6800 versus 25.3 million per mm² for the Vega 64X. The W6800 doubles the transistor count while using nearly the same die area.

Clock speeds also reflect the architectural leap. The W6800 runs at a 1575 MHz base clock and boosts to 2322 MHz, while the Vega 64X operates at 1250 MHz base and 1468 MHz boost. The W6800's boost clock is nearly 60% higher than the Vega 64X's boost clock. Memory technology diverges completely: the W6800 uses 32 GB of GDDR6 on a 256-bit bus, while the Vega 64X uses 16 GB of HBM2 on a 2048-bit bus. Interestingly, both achieve exactly 512.0 GB/s of memory bandwidth, but through very different means. The W6800 hits that number with a narrow bus and fast GDDR6 at 16 Gbps effective, while the Vega 64X uses an extremely wide HBM2 stack at 2 Gbps effective.

The compute resources are counterintuitive. The Vega 64X actually has more shading units (4096 versus 3840) and more texture mapping units (256 versus 240). But the W6800 has more ROPs (96 versus 64) and adds 60 ray tracing cores, a feature entirely absent from the Vega 64X. The W6800's pixel rate is 222.9 GPixel/s versus 93.95 GPixel/s for the Vega 64X, and its texture rate is 557.3 GTexel/s versus 375.8 GTexel/s. In raw FP32 compute, the W6800 delivers 17.83 TFLOPS against 12.03 TFLOPS for the Vega 64X. FP16 performance follows the same pattern: 35.67 TFLOPS versus 24.05 TFLOPS, both at a 2:1 ratio.

Interface and connectivity differ substantially. The W6800 uses PCIe 4.0 x16, while the Vega 64X is limited to PCIe 3.0 x16. The W6800 has six mini-DisplayPort 1.4a outputs, while the Vega 64X's display outputs are listed as "Portable Device Dependent," reflecting its original design for Apple's iMac Pro. The W6800 is a dual-slot card requiring one 6-pin and one 8-pin power connector with a 600 W suggested PSU. The Vega 64X is an IGP (integrated graphics processor) with no power connectors. Both cards consume 250 W TDP.

Where Each One Wins

The W6800 wins every benchmark category where data exists. In Metal workloads, the 109% advantage makes it the clear choice for GPU-accelerated rendering, video encoding, and compute tasks that leverage Apple's Metal framework. In OpenCL, the 55.2% lead confirms it also dominates cross-platform compute workloads. The W6800's ray tracing cores give it a capability that the Vega 64X cannot match at all, making it necessary for any modern ray-traced rendering pipeline.

The Vega 64X does have one theoretical advantage: its 4096 shading units exceed the W6800's 3840, and its 2048-bit HBM2 bus provides massive memory bandwidth per clock. However, the benchmark data shows these advantages do not translate into real-world wins. The Vega 64X's higher shading unit count is offset by its much lower clock speeds and older architecture. Its HBM2 memory, while impressive on paper, delivers the same 512.0 GB/s as the W6800's GDDR6, so the wider bus provides no practical benefit.

For workloads that depend on memory capacity, the W6800's 32 GB dwarfs the Vega 64X's 16 GB. That double capacity matters for large datasets, high-resolution textures, and multi-GPU rendering workloads that exceed 16 GB. The W6800 also supports PCIe 4.0, doubling the theoretical bandwidth available to the Vega 64X's PCIe 3.0 interface. For data transfer between GPU and system memory, the W6800 has a clear edge.

The Vega 64X's only advantage is its IGP form factor. Since it requires no power connectors and has no specified dimensions, it can fit into systems where a dual-slot card like the W6800 would not work. This makes the Vega 64X relevant for compact or proprietary chassis, particularly Apple systems designed around its portable device dependent display outputs. But for any task where performance matters, the W6800 wins outright.

FAQ

Q: Is the AMD Radeon PRO W6800 faster than the AMD Radeon Pro Vega 64X in all benchmarks?

A: Yes. The W6800 wins both recorded benchmark comparisons. In Geekbench Metal, it scores 174,420 versus 83,450, a 109% advantage. In Geekbench OpenCL, it scores 121,808 versus 78,467, a 55.2% lead.

Q: How does the memory bandwidth compare between the two cards?

A: Both cards deliver exactly 512.0 GB/s of memory bandwidth. The W6800 achieves this with 32 GB of GDDR6 on a 256-bit bus at 16 Gbps effective. The Vega 64X uses 16 GB of HBM2 on a 2048-bit bus at 2 Gbps effective.

Q: Does the Vega 64X have ray tracing support?

A: No. The Vega 64X has no ray tracing cores listed in the database. The W6800 includes 60 ray tracing cores, making it the only one of the two capable of hardware-accelerated ray tracing.

Q: What is the transistor count difference between the two GPUs?

A: The W6800 contains 26,800 million transistors on a 7 nm TSMC process. The Vega 64X contains 12,500 million transistors on a 14 nm GlobalFoundries process. The W6800 has more than double the transistor count while using a similar die size (520 mm² versus 495 mm²).

Q: Which card has more shading units?

A: The Vega 64X has more shading units at 4096, compared to 3840 for the W6800. However, the W6800's higher clock speeds (2322 MHz boost versus 1468 MHz boost) and newer architecture result in higher overall performance.

Q: What are the power requirements for each card?

A: Both cards have a 250 W TDP. The W6800 is a dual-slot card requiring one 6-pin and one 8-pin power connector, with a 600 W suggested PSU. The Vega 64X is an IGP with no power connectors.

Specification Differences

The two cards differ across nearly every specification category. The W6800 uses a Navi 21 chip on RDNA 2.0 architecture with a 7 nm TSMC process, while the Vega 64X uses a Vega 10 chip on GCN 5.0 architecture with a 14 nm GlobalFoundries process. Transistor count is 26,800 million versus 12,500 million, and die size is 520 mm² versus 495 mm². Transistor density is 51.5 million per mm² versus 25.3 million per mm².

Clock speeds differ significantly: the W6800 runs at 1575 MHz base and 2322 MHz boost, while the Vega 64X runs at 1250 MHz base and 1468 MHz boost. Memory configurations are completely different: the W6800 has 32 GB of GDDR6 on a 256-bit bus at 16 Gbps effective, while the Vega 64X has 16 GB of HBM2 on a 2048-bit bus at 2 Gbps effective. Both achieve 512.0 GB/s bandwidth.

Compute resources vary: the W6800 has 3840 shading units, 240 TMUs, 96 ROPs, and 60 ray tracing cores. The Vega 64X has 4096 shading units, 256 TMUs, and 64 ROPs, with no ray tracing cores. Pixel rates are 222.9 GPixel/s versus 93.95 GPixel/s, and texture rates are 557.3 GTexel/s versus 375.8 GTexel/s. FP32 performance is 17.83 TFLOPS versus 12.03 TFLOPS, and FP16 is 35.67 TFLOPS versus 24.05 TFLOPS.

The W6800 uses PCIe 4.0 x16 and has six mini-DisplayPort 1.4a outputs. The Vega 64X uses PCIe 3.0 x16 and has portable device dependent display outputs. The W6800 is a dual-slot card with 1x 6-pin and 1x 8-pin power connectors and a 600 W suggested PSU. The Vega 64X is an IGP with no power connectors. The W6800 supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Vega 64X supports DirectX 12 (12_1) and Vulkan 1.3. Both support OpenGL 4.6. The W6800 measures 267 mm in length, 120 mm in height, and 50 mm in width; the Vega 64X has no listed dimensions.

The Verdict

The data points to one conclusion: the AMD Radeon PRO W6800 is the superior card for virtually every professional workload. Its 109% Metal advantage and 55.2% OpenCL advantage are not marginal improvements; they represent a generational leap. The W6800's 96th percentile ranking versus the Vega 64X's 92nd percentile, combined with its double memory capacity, ray tracing support, and PCIe 4.0 interface, make it the obvious choice for any new workstation build.

The Vega 64X's only niche is its IGP form factor. With no power connectors and no listed dimensions, it can fit into systems where a dual-slot card cannot. For users locked into a proprietary chassis or Apple's iMac Pro form factor, the Vega 64X may be the only option. But the benchmark data shows it is a compromise: a card with more shading units but lower clocks, older architecture, and half the memory capacity.

For rendering, machine learning, video processing, or any compute-heavy task, the W6800 is the pick. Its 32 GB memory capacity handles datasets that would exceed the Vega 64X's 16 GB limit. Its ray tracing cores future-proof it for modern rendering pipelines. Its 2322 MHz boost clock delivers sustained performance that the Vega 64X's 1468 MHz boost cannot approach.

The Vega 64X, released in March 2019, is end-of-life. The W6800, released in June 2021, is also end-of-life, but it represents a much more recent design. The W6800's launch MSRP was 2,249 USD. The Vega 64X has no recorded launch MSRP. For anyone choosing between these two based on the database measurements, the W6800 wins on every measurable axis. The only reason to select the Vega 64X is physical compatibility, not performance.