AMD Radeon Pro 455 vs AMD Radeon Pro 560X Comparison

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon Pro 560X records an average benchmark score of 15082, while the AMD Radeon Pro 455 scores 12831. That places the Pro 560X at the 57th percentile of all GPUs in the database, versus the 52nd percentile for the Pro 455.

Q: How do the two cards compare in Geekbench Metal performance?

A: The Radeon Pro 560X scores 18763 in Geekbench Metal, which is 17.9% higher than the Pro 455's 15916. This is one of the two benchmark wins for the Pro 560X in the head-to-head comparison.

Q: Does the Radeon Pro 455 win any benchmark test?

A: Yes, the Pro 455 wins the Geekbench OpenCL test with a score of 10336, while the Pro 560X scores 9663. The Pro 455 leads by 6.5% in that specific workload, despite losing the other two tests.

Q: What is the difference in memory capacity between the two?

A: The Radeon Pro 560X has 4 GB of GDDR5 memory, while the Radeon Pro 455 has 2 GB of GDDR5 memory. Both use a 128-bit memory bus, but the Pro 560X achieves 94.08 GB/s of bandwidth versus 81.28 GB/s for the Pro 455.

Q: Are both GPUs based on the same architecture?

A: Yes, both are built on GCN 4.0 architecture and use a 14 nm process node from GlobalFoundries. They share the same transistor count of 3,000 million and the same die size of 123 mm².

Q: What is the power consumption difference?

A: The Radeon Pro 560X has a TDP of 75 W, while the Radeon Pro 455 has a TDP of 35 W. The Pro 455 consumes less power despite being the slower card in most tests.

Architecture Differences

Both GPUs belong to the same GCN 4.0 architecture generation and are fabricated on the same 14 nm GlobalFoundries process. The transistor count is identical at 3,000 million, and the die size is the same at 123 mm², giving both a transistor density of 24.4M per mm². However, the chips themselves differ: the Radeon Pro 560X uses the Polaris 21 chip, while the Radeon Pro 455 uses the Baffin chip.

The compute configuration diverges significantly. The Pro 560X packs 1024 shading units, 64 texture mapping units, and 16 ROPs. The Pro 455 has 768 shading units, 48 TMUs, and 16 ROPs. This means the Pro 560X has 33% more shading units and 33% more TMUs, while the ROP count remains equal.

Clock behavior differs as well. The Pro 560X runs its memory at 1470 MHz with an effective 5.9 Gbps data rate, while the Pro 455 runs memory at 1270 MHz with an effective 5.1 Gbps data rate. Neither GPU has a listed base or boost clock in the database, so the memory clocks are the primary clock comparison.

The memory subsystem shows further divergence. The Pro 560X has 4 GB of GDDR5 memory on a 128-bit bus, delivering 94.08 GB/s of bandwidth. The Pro 455 has 2 GB of GDDR5 memory on the same 128-bit bus, but bandwidth drops to 81.28 GB/s. The 128-bit bus width is shared, but the higher memory clock on the Pro 560X produces the bandwidth advantage.

The two cards also differ in form factor. The Pro 560X is listed as an IGP (integrated graphics processor) with no power connectors, while the Pro 455 is an MXM module, also with no power connectors. Both use a PCIe 3.0 x8 bus interface and have portable-device-dependent display outputs.

API support is identical: both cards expose DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3. Neither GPU has ray tracing cores or tensor cores. The production status for both is end-of-life, and neither has a recorded launch MSRP in the database.

Head-to-Head Benchmarks

The head-to-head data shows a clear split across the three recorded tests. The Pro 560X wins two of the three tests, while the Pro 455 wins one. The Pro 560X takes the overall win count at 2 to 1.

The largest margin of victory comes in Geekbench Vulkan. The Pro 560X scores 16819 against the Pro 455's 12240, a 37.4% lead. This is the decisive performance gap in the comparison. In Metal, the Pro 560X scores 18763 versus 15916 for the Pro 455, a 17.9% advantage. These two wins anchor the Pro 560X's higher average score.

The single win for the Pro 455 comes in Geekbench OpenCL. There, the Pro 455 scores 10336 while the Pro 560X scores 9663, giving the Pro 455 a 6.5% lead. This is an interesting reversal: the older, lower-spec card outperforms the newer one in a compute-style API workload.

Looking at the average scores, the Pro 560X sits at 15082, which is 17.5% higher than the Pro 455's 12831. The Pro 560X's nearest rivals in the database include the NVIDIA GeForce GTX 660 Ti (average score 15063, delta 0.1%), the AMD Radeon RX 7600 (15171, delta -0.6%), the NVIDIA GeForce RTX 3050 OEM (15199, delta -0.8%), and the AMD Radeon 680M (15270, delta -1.2%). The Pro 455's nearest rivals are the NVIDIA GeForce GTX 590 (12830, delta 0%), the AMD FirePro W5100 (12847, delta -0.1%), the AMD Radeon 740M (12870, delta -0.3%), and the NVIDIA GeForce GTX 670 (12773, delta 0.5%).

The percentile data reinforces the same story. The Pro 560X sits at the 57th percentile of all GPUs in the database, meaning it outperforms 57% of GPUs recorded there. The Pro 455 sits at the 52nd percentile. The Pro 560X lands roughly on par with the GTX 660 Ti and RX 7600, within 0.6% of those rivals in both directions. The Pro 455 sits within a narrow band around 0.5% of the GTX 590 and GTX 670 in the database.

Pixel rate and texture rate follow the compute advantage. The Pro 560X has a pixel rate of 16.06 GPixel/s and a texture rate of 17.9% higher texture rate over the Pro 455, at 64.26 GTexel/s versus 41.04 GTexel/s. The Pro 455 trails in texture throughput by roughly 56% in the recorded data.

FP32 output also favors the Pro 560X. The Pro 560X delivers 2.056 TFLOPS in FP32 with a 1:1 ratio for FP16 at the same 2.056 TFLOPS, giving it a 56% lead over the Pro 455's 1,313.3 GFLOPS. The Pro 455 has 1,313.3 GFLOPS in both FP32 and FP16 (also 1:1). The Pro 560X leads by about 57% in FP32 throughput.

Specification Differences

The two cards share several core specifications: both use GCN 4.0, 14 nm GlobalFoundries process, 3,000 million transistors, 123 mm² die size, 128-bit memory bus, PCIe 3.0 x8, and identical API support. The differences are listed below.

| Specification | Radeon Pro 560X | Radeon Pro 455 |

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

| Chip | Polaris 21 | Baffin |

| Generation | Radeon Pro Mac (500X Series) | Radeon Pro Mac (400 Series) |

| Memory size | 4 GB | 2 GB |

| Memory clock | 1470 MHz (5.9 Gbps effective) | 1270 MHz (5.1 Gbps effective) |

| Memory bandwidth | 94.08 GB/s | 81.28 GB/s |

| Shading units | 1024 | 768 |

| TMUs | 64 | 48 |

| ROPs | 16 | 16 |

| Pixel rate | 16.06 GPixel/s | 13.68 GPixel/s |

| Texture rate | 64.26 GTexel/s | 41.04 GTexel/s |

| FP32 | 2.056 TFLOPS | 1,313.3 GFLOPS |

| FP16 | 2.056 TFLOPS (1:1) | 1,313.3 GFLOPS (1:1) |

| TDP | 75 W | 35 W |

| Slot width | IGP | MXM Module |

| Release date | 2018-07-15 | 2016-10-29 |

The ROP count is identical at 16. The power connectors are absent on both. The memory type is GDDR5 on both. The bus interface is PCIe 3.0 x8 on both. Display outputs are portable-device dependent on both. Neither has a recorded launch MSRP.

The Verdict

The data points to the Radeon Pro 560X as the stronger GPU overall. Its average benchmark score of 15082 is 17.5% higher than the Pro 455's 12831, and it holds a 57th percentile position versus the 52nd percentile for the Pro 455. The Pro 560X wins two of the three head-to-head tests, including the Vulkan test by a commanding 37.4% margin.

The Pro 455 is not without merit. It wins the OpenCL test by 6.5%, and its 35 W TDP is substantially lower than the Pro 560X's 75 W. For workloads that favor OpenCL, the Pro 455 could be the better fit. But the Pro 560X's higher shading unit count, larger memory capacity, and higher bandwidth make it the more capable card for the majority of recorded benchmarks.

Buyers who need maximum compute throughput, particularly in Metal and Vulkan, should choose the Pro 560X. Those who prioritize power efficiency and work primarily in OpenCL might find the Pro 455 adequate, though they will sacrifice significant performance in other APIs.

Where Each One Wins

AMD Radeon Pro 560X wins in:

• Geekbench Metal (18763 vs 15916, 17.9% lead)
• Geekbench Vulkan (16819 vs 12240, 37.4% lead)
• Overall average benchmark score (15082 vs 12831, 17.5% lead)
• Memory bandwidth (94.08 GB/s vs 81.28 GB/s)
• Pixel rate (16.06 GPixel/s vs 13.68 GPixel/s)
• Texture rate (64.26 GTexel/s vs 41.04 GTexel/s)
• FP32 and FP16 throughput (2.056 TFLOPS vs 1,313.3 GFLOPS)
• Shading unit count (1024 vs 768)
• TMU count (64 vs 48)
• Memory capacity (4 GB vs 2 GB)

AMD Radeon Pro 455 wins in:

• Geekbench OpenCL (10336 vs 9663, 6.5% lead)
• Power efficiency (35 W TDP vs 75 W TDP)
• Earlier release date (2016-10-29 vs 2018-07-15)

The Pro 560X is the clear choice for graphics-intensive and modern API workloads. The Pro 455 remains relevant only for OpenCL-centric tasks and scenarios where the lower power draw is a priority. The database records two wins for the Pro 560X and one for the Pro 455, and the average score gap of 17.5% reinforces that verdict.