AMD Radeon Pro WX 4100 vs NVIDIA GeForce GTX 1660 Ti Comparison

The Verdict

The NVIDIA GeForce GTX 1660 Ti is the decisive winner for nearly all workloads, taking 8 of 9 head-to-head benchmarks and leading by margins that often exceed 200%. Its average benchmark score of 7723 places it 18% ahead of the AMD Radeon Pro WX 4100's 6330 average. The GTX 1660 Ti also occupies a higher global percentile, ranking in the 41st percentile of all GPUs versus the WX 4100's 37th. The single exception is Vulkan performance, where the AMD card wins, but that one victory does little to offset the NVIDIA card's dominance across DirectX, OpenCL, compute, and 2D tests.

The AMD Radeon Pro WX 4100 is the choice only for users who specifically prioritize Vulkan API performance or who need a compact, low-power professional card. Its 50 W TDP, single-slot design, and lack of power connectors make it far easier to install in constrained systems. The GTX 1660 Ti, by contrast, demands a dual-slot footprint and an 8-pin power connector. For anyone building a general-purpose workstation or gaming system, the recorded data points unambiguously to the GTX 1660 Ti.

Architecture Differences

The two cards come from fundamentally different design philosophies. The GTX 1660 Ti uses the TU116 chip built on TSMC's 12 nm process, housing 6,600 million transistors within a 284 mm² die. The Radeon Pro WX 4100 uses the Baffin chip, fabricated by GlobalFoundries on a 14 nm process, with 3,000 million transistors on a much smaller 123 mm² die. Transistor density is close, 23.2M per mm² versus 24.4M per mm², but the NVIDIA chip carries more than double the total transistor count.

Architecture generation separates them further. The GTX 1660 Ti is Turing-based, belonging to the GeForce 16 family, while the WX 4100 uses GCN 4.0 from the Radeon Pro Polaris generation. The Turing part supports DirectX 12 (12_1) and Vulkan 1.4, whereas the GCN part tops out at DirectX 12 (12_0) and Vulkan 1.3. Both cards offer OpenGL 4.6, but the NVIDIA card's newer API level gives it a compatibility edge.

The memory subsystem also differs sharply. The GTX 1660 Ti pairs 6 GB of GDDR6 on a 192-bit bus with 12 Gbps effective speed, yielding 288.0 GB/s of bandwidth. The WX 4100 uses 4 GB of GDDR5 on a 128-bit bus at 6 Gbps effective, producing only 96.00 GB/s. That threefold bandwidth advantage for the NVIDIA card is a primary driver of its benchmark leads.

Compute resources follow the same pattern. The GTX 1660 Ti packs 1,536 shading units, 96 texture mapping units, and 48 ROPs. The WX 4100 offers 1,024 shading units, 64 TMUs, and just 16 ROPs. The NVIDIA card's FP32 throughput is 5.437 TFLOPS versus 2.460 TFLOPS for AMD, more than double. Pixel rate tells a similar story: 84.96 GPixel/s versus 19.22 GPixel/s. Texture rate is 169.9 GTexel/s versus 76.86 GTexel/s.

Where Each One Wins

The GTX 1660 Ti wins across the broadest range of workloads. DirectX performance is its strongest territory, with leads of 312.5% in DirectX 10, 329.2% in DirectX 11, and 239.3% in DirectX 9. Even in DirectX 12, where modern architectures typically narrow gaps, the NVIDIA card leads by 131.8%. The 3DMark Steel Nomad DX12 test confirms this, with the GTX 1660 Ti scoring 1061.

Compute workloads heavily favor the NVIDIA card. In PassMark GPU Compute, it scores 5226 versus 1475, a 254.3% advantage. OpenCL results show the same trend: the GTX 1660 Ti posts 51029 in Geekbench OpenCL, while the WX 4100 manages 17642, a 189.2% gap. The GTX 1660 Ti also wins the 2D test, 804 versus 646, a 24.5% margin.

The Radeon Pro WX 4100 has one clear niche: Vulkan. In Geekbench Vulkan, AMD scores 18703 against NVIDIA's 5827, a 68.8% lead for the AMD card. This is the only head-to-head benchmark where the WX 4100 emerges victorious, and it suggests the GCN architecture's Vulkan driver stack is exceptionally well optimized. The WX 4100 also supports Metal, scoring 21018 in Geekbench Metal, a test the GTX 1660 Ti does not appear in at all.

For professional environments, the WX 4100's 4x mini-DisplayPort 1.4a outputs may be more practical for multi-monitor setups than the GTX 1660 Ti's single DVI, HDMI 2.0, and DisplayPort 1.4a.

FAQ

Q: Which card has the higher average benchmark score?

A: The NVIDIA GeForce GTX 1660 Ti averages 7723, while the AMD Radeon Pro WX 4100 averages 6330, a difference of roughly 18%.

Q: Is the AMD Radeon Pro WX 4100 better at any API?

A: Yes, the WX 4100 wins Geekbench Vulkan by 68.8%, scoring 18703 versus 5827 for the GTX 1660 Ti.

Q: How large is the memory bandwidth gap?

A: The GTX 1660 Ti delivers 288.0 GB/s from GDDR6 on a 192-bit bus, while the WX 4100 offers 96.00 GB/s from GDDR5 on a 128-bit bus.

Q: Which card is more power-efficient in terms of TDP?

A: The AMD Radeon Pro WX 4100 has a 50 W TDP and requires no power connectors, whereas the GTX 1660 Ti has a 120 W TDP and needs a single 8-pin connector.

Q: What are the DirectX 12 performance scores?

A: In PassMark DirectX 12, the GTX 1660 Ti scores 51 and the WX 4100 scores 22, giving NVIDIA a 131.8% lead.

Q: Which card ranks higher globally?

A: The GTX 1660 Ti sits in the 41st percentile of all GPUs, while the WX 4100 sits in the 37th percentile.

Head-to-Head Benchmarks

The largest single win for the GTX 1660 Ti comes in PassMark DirectX 11, where it scores 103 against 24, a 329.2% advantage. DirectX 10 is nearly as dominant, with 66 versus 16, a 312.5% gap. DirectX 9 shows 190 versus 56, or 239.3%. These results indicate that the NVIDIA card is not merely faster in absolute terms, it scales better across older API generations as well.

The compute workloads are equally lopsided. PassMark GPU Compute gives the GTX 1660 Ti a 254.3% win, 5226 to 1475. OpenCL in Geekbench shows 51029 versus 17642, a 189.2% gap. The DirectX 12 test, often a more balanced comparison, still favors NVIDIA by 131.8%, with scores of 51 and 22.

The 3DMark Steel Nomad DX12 test, while not run on the WX 4100, records a score of 1061 for the GTX 1660 Ti, which aligns with its strong DirectX 12 showing. The PassMark G3D score of 12871 for NVIDIA versus 3699 for AMD represents a 248% lead, confirming that the GTX 1660 Ti is in a different performance class for rasterization-heavy workloads.

The WX 4100's Vulkan victory is the outlier. With 18703 points to NVIDIA's 5827, the AMD card leads by 68.8%, a substantial margin that suggests its GCN 4.0 architecture has an unusually efficient Vulkan implementation. This is the only benchmark where the two cards reverse their usual positions.

The 2D test is the closest race, with the GTX 1660 Ti winning 804 to 646, a 24.5% margin. That is still a comfortable win, but it is the smallest of the NVIDIA card's eight victories.

Specification Differences

The two cards differ in nearly every core specification. The GTX 1660 Ti uses a 12 nm process from TSMC, while the WX 4100 uses 14 nm from GlobalFoundries. Transistor counts are 6,600 million versus 3,000 million, and die sizes are 284 mm² versus 123 mm².

Clock speeds favor the NVIDIA card. Its base clock is 1500 MHz with a boost of 1770 MHz, while the AMD card runs at 1125 MHz base and 1201 MHz boost. Memory clock is identical in terms of base frequency, 1500 MHz, but effective speed differs: 12 Gbps for GDDR6 versus 6 Gbps for GDDR5.

Memory capacity and bandwidth are major differentiators. The GTX 1660 Ti has 6 GB of GDDR6 on a 192-bit bus with 288.0 GB/s bandwidth. The WX 4100 has 4 GB of GDDR5 on a 128-bit bus with 96.00 GB/s.

Compute unit counts diverge across the board. The NVIDIA card has 1,536 shading units, 96 TMUs, and 48 ROPs. The AMD card has 1,024 shading units, 64 TMUs, and 16 ROPs. Pixel rate is 84.96 GPixel/s versus 19.22 GPixel/s, and texture rate is 169.9 GTexel/s versus 76.86 GTexel/s. FP32 performance is 5.437 TFLOPS versus 2.460 TFLOPS.

Power and physical design differ substantially. The GTX 1660 Ti has a 120 W TDP, requires a 300 W suggested PSU, and uses a dual-slot cooler with one 8-pin connector. The WX 4100 has a 50 W TDP, a 250 W suggested PSU, a single-slot design, and no power connectors. The NVIDIA card is 229 mm long, 111 mm tall, and 35 mm wide. The AMD card is 168 mm long and 69 mm tall, with no width listed.

The bus interface also differs: PCIe 3.0 x16 for NVIDIA versus PCIe 3.0 x8 for AMD. Display outputs are 1x DVI, 1x HDMI 2.0, and 1x DisplayPort 1.4a for the GTX 1660 Ti, versus 4x mini-DisplayPort 1.4a for the WX 4100. API support favors NVIDIA with DirectX 12 (12_1) and Vulkan 1.4, while AMD offers DirectX 12 (12_0) and Vulkan 1.3, though AMD adds Metal support.