AMD Radeon Pro WX 3100 vs NVIDIA GeForce GTX 675MX Comparison

Where Each One Wins

The recorded benchmark data splits cleanly between these two mobile and professional graphics solutions. The NVIDIA GeForce GTX 675MX claims the only direct head-to-head victory in the database, winning the Geekbench OpenCL test with a score of 10,723 against the AMD Radeon Pro WX 3100's 7,333. That translates to a 46.2% advantage for the NVIDIA part, a decisive margin in raw compute throughput.

The AMD Radeon Pro WX 3100, by contrast, does not register a single direct benchmark win over the GTX 675MX in the provided head-to-head results. However, its strengths lie elsewhere. The WX 3100's benchmark profile includes a Geekbench Vulkan score of 7,827, a test the GTX 675MX does not appear in, suggesting a capability in modern API workloads that the older NVIDIA part cannot match. Additionally, the WX 3100 carries a 4 GB frame buffer compared to the GTX 675MX's 2 GB, which in real-world usage would favor the AMD card in memory-capacity-sensitive tasks like larger texture sets or compute datasets.

The GTX 675MX also holds a percentile advantage. It sits at the 43rd percentile among all GPUs in the database, while the WX 3100 sits at the 41st. The average benchmark score for the GTX 675MX is 8,427, versus 7,580 for the AMD card, a gap of roughly 11% in aggregate performance. The data therefore indicates that the GTX 675MX is the stronger compute performer overall, while the WX 3100 offers a more modern feature set and double the memory capacity.

Architecture Differences

The two cards come from different architectural eras and design philosophies. The NVIDIA GeForce GTX 675MX uses the GK104 chip built on the Kepler architecture, manufactured on a 28 nm process at TSMC. This is a large, complex die: 3,540 million transistors spread across 294 mm², yielding a transistor density of 12.0 million per square millimeter. The AMD Radeon Pro WX 3100 uses the Lexa chip, built on GCN 4.0 architecture, manufactured on a 14 nm process at GlobalFoundries. It packs 2,200 million transistors into a much smaller 103 mm² die, achieving a far higher transistor density of 21.4 million per square millimeter.

These architectural choices lead to substantial differences in compute resource allocation. The GTX 675MX fields 960 shading units, 80 texture mapping units, and 32 ROPs. The WX 3100 counters with 512 shading units, 32 TMUs, and 16 ROPs. Despite having fewer of every unit type, the AMD card achieves comparable raw FP32 throughput: 1,248.3 GFLOPS versus 1,255.7 GFLOPS for the NVIDIA part. This near-parity in floating-point performance comes from the WX 3100's higher clock speeds, with a base of 925 MHz and a boost of 1,219 MHz, while the GTX 675MX's clock data for base and boost is not recorded, only its memory clock of 900 MHz (3.6 Gbps effective). The WX 3100 also supports FP16 at a 1:1 ratio, delivering 1,248.3 GFLOPS in half precision, while the GTX 675MX has no recorded FP16 capability.

Memory subsystems diverge sharply. The GTX 675MX uses 2 GB of GDDR5 on a 256-bit bus, delivering 115.2 GB/s of bandwidth. The WX 3100 uses 4 GB of GDDR5 on a 128-bit bus, delivering 96.00 GB/s. The NVIDIA card has wider memory but less capacity, while the AMD card offers more capacity at lower bandwidth. Interface and power delivery also differ: the GTX 675MX is an MXM-B (3.0) module with no power connectors, drawing up to 100 W, while the WX 3100 is a single-slot PCIe 3.0 x8 card with no power connectors, drawing 65 W and suggesting a 250 W power supply. The WX 3100 also brings modern display outputs, with 1x DisplayPort 1.4a and 2x mini-DisplayPort 1.4a, while the GTX 675MX's outputs are listed as portable device dependent.

API support separates the two further. The GTX 675MX supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The WX 3100 supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3. The AMD card's newer API levels, particularly Vulkan 1.3 and full DirectX 12_0, reflect its later release and more modern architecture.

Head-to-Head Benchmarks

The single direct comparison in the database is the Geekbench OpenCL test. The NVIDIA GeForce GTX 675MX scores 10,723, while the AMD Radeon Pro WX 3100 scores 7,333. The delta is 46.2% in favor of NVIDIA. This is not a marginal edge; it is a dominant showing in raw compute throughput. The GTX 675MX's wider 256-bit memory bus and higher bandwidth (115.2 GB/s versus 96.00 GB/s) likely contribute to this result, as OpenCL workloads often stress memory bandwidth alongside compute.

The nearest rivals listed for each card provide context for these scores. The GTX 675MX's average benchmark score of 8,427 places it within 0.1% of the AMD Radeon 880M (8,436), 0.4% below the NVIDIA GeForce MX330 (8,458), and 0.4% below the AMD Radeon HD 8870M (8,462). It is 1.2% ahead of the AMD Radeon R9 M375X (8,325). The WX 3100's average of 7,580 puts it 0.3% ahead of the AMD Radeon R7 250 (7,557), 0.4% ahead of the Intel Arc A310 (7,550), but 1.2% behind the AMD Radeon 540 (7,673) and 1.4% behind the NVIDIA GeForce GTX 1650 (7,472). Note that the GTX 1650, despite being a rival to the WX 3100, scores lower on average, which highlights the variance in benchmark results across different test suites.

When looking at the OpenCL-specific result, the GTX 675MX's 10,723 is far above its own average of 8,427, suggesting it excels particularly in compute-heavy workloads. The WX 3100's OpenCL score of 7,333 is close to its average of 7,580, indicating more consistent performance across different tests. The Vulkan score for the WX 3100 at 7,827 is also near its average, suggesting the card's modern API support does not translate into a large performance swing in the database's measurements.

FAQ

Q: Which GPU is faster in OpenCL compute workloads?

A: The NVIDIA GeForce GTX 675MX is significantly faster, scoring 10,723 in Geekbench OpenCL versus the AMD Radeon Pro WX 3100's 7,333, a 46.2% advantage.

Q: How do their average benchmark scores compare?

A: The GTX 675MX has a higher average benchmark score of 8,427, while the WX 3100 averages 7,580. This places the NVIDIA card at the 43rd percentile of all GPUs, versus the 41st percentile for the AMD card.

Q: Which card has more memory capacity?

A: The AMD Radeon Pro WX 3100 has 4 GB of GDDR5 memory, double the 2 GB found on the NVIDIA GeForce GTX 675MX.

Q: What are the memory bandwidth differences?

A: The GTX 675MX provides 115.2 GB/s over a 256-bit bus, while the WX 3100 provides 96.00 GB/s over a 128-bit bus.

Q: Does the AMD card support modern APIs better than the NVIDIA card?

A: Yes. The WX 3100 supports Vulkan 1.3 and DirectX 12 (12_0), while the GTX 675MX supports Vulkan 1.2.175 and DirectX 12 (11_0).

Q: What is the power draw difference?

A: The GTX 675MX has a TDP of 100 W, while the WX 3100 has a TDP of 65 W and comes with a suggested power supply of 250 W.

Specification Differences

| Specification | NVIDIA GeForce GTX 675MX | AMD Radeon Pro WX 3100 |

|---|---|---|

| Chip | GK104 | Lexa |

| Architecture | Kepler | GCN 4.0 |

| Process Node | 28 nm | 14 nm |

| Foundry | TSMC | GlobalFoundries |

| Transistors | 3,540 million | 2,200 million |

| Die Size | 294 mm² | 103 mm² |

| Transistor Density | 12.0M / mm² | 21.4M / mm² |

| Base Clock | Not recorded | 925 MHz |

| Boost Clock | Not recorded | 1219 MHz |

| Memory Clock | 900 MHz (3.6 Gbps effective) | 1500 MHz (6 Gbps effective) |

| Memory Size | 2 GB | 4 GB |

| Memory Type | GDDR5 | GDDR5 |

| Memory Bus Width | 256 bit | 128 bit |

| Memory Bandwidth | 115.2 GB/s | 96.00 GB/s |

| Shading Units | 960 | 512 |

| TMUs | 80 | 32 |

| ROPs | 32 | 16 |

| Pixel Rate | 13.08 GPixel/s | 19.50 GPixel/s |

| Texture Rate | 52.32 GTexel/s | 39.01 GTexel/s |

| FP32 Performance | 1,255.7 GFLOPS | 1,248.3 GFLOPS |

| FP16 Performance | Not recorded | 1,248.3 GFLOPS (1:1) |

| TDP | 100 W | 65 W |

| Slot Width | MXM Module | Single-slot |

| Power Connectors | None | None |

| Suggested PSU | Not recorded | 250 W |

| Bus Interface | MXM-B (3.0) | PCIe 3.0 x8 |

| Display Outputs | Portable Device Dependent | 1x DisplayPort 1.4a, 2x mini-DisplayPort 1.4a |

| DirectX Support | 12 (11_0) | 12 (12_0) |

| OpenGL Support | 4.6 | 4.6 |

| Vulkan Support | 1.2.175 | 1.3 |

| Length | Not recorded | 168 mm (6.6 inches) |

| Height | Not recorded | 69 mm (2.7 inches) |

| Release Date | 2012-09-30 | 2017-06-11 |

| Production Status | End-of-life | End-of-life |

| Launch MSRP | Not recorded | 199 USD |

The specification sheet highlights the generational gap. The GTX 675MX is a wider, more power-hungry chip with more shading units, TMUs, and ROPs, but it relies on older 28 nm manufacturing. The WX 3100 uses a smaller, denser 14 nm chip with fewer units but higher clocks and better API support. The data confirms that the NVIDIA card wins on raw compute and bandwidth, while the AMD card wins on capacity, efficiency, and modern feature support.