AMD Radeon Pro 575 vs AMD Radeon RX 7900 GRE Comparison

The AMD Radeon Pro 575 and the AMD Radeon RX 7900 GRE represent two very different eras of GPU design. The Pro 575 is an end-of-life mobile workstation part from 2017, while the RX 7900 GRE is an active desktop gaming card from 2023. The benchmark data shows a massive generational gulf, but the specifics of where and how each card wins are worth examining for anyone comparing them.

Head-to-Head Benchmarks

The head-to-head data is lopsided, with the RX 7900 GRE taking both recorded victories. In the Geekbench OpenCL test, the RX 7900 GRE scored 175758 against the Pro 575's 34596. That is a delta of -80.3% from the perspective of the Pro 575, meaning the RX 7900 GRE is roughly five times faster in this compute-heavy workload. The gap is slightly narrower in Geekbench Vulkan, where the RX 7900 GRE scored 99850 and the Pro 575 scored 37878, a delta of -62.1%. Even in the more favorable Vulkan API for the older card, the RX 7900 GRE still more than doubles its output.

The Pro 575 does not win any of the recorded head-to-head tests. Its average benchmark score across all tests is 39555, while the RX 7900 GRE's average is 32456. This is an important nuance: the average scores are closer than the head-to-head deltas suggest. The Pro 575 sits at the 82nd percentile of all GPUs in the database, while the RX 7900 GRE sits at the 77th percentile. The RX 7900 GRE's average is dragged down by its inclusion of PassMark tests for older DirectX versions, where it scores very low (139 in DirectX 10, 300 in DirectX 11, 107 in DirectX 12, and 310 in DirectX 9). Its PassMark G3D score is 27089, and its GPU compute score is 15016, which are strong numbers, but they are averaged alongside those legacy API scores.

The Pro 575's nearest rivals in the database include the NVIDIA RTX A500 Mobile (avg score 39568, delta 0%), the AMD Radeon Pro 575X (avg 39116, delta 1.1%), and the AMD Radeon Pro WX 7100 (avg 40063, delta -1.3%). The RX 7900 GRE's nearest rivals are the AMD FirePro S10000 (avg 32388, delta 0.2%), the AMD FirePro S9300 X2 (avg 32540, delta -0.3%), and the AMD Radeon RX 590 GME (avg 32601, delta -0.4%). The RX 7900 GRE is competitive with these older dual-GPU and budget cards, but its average is not in the same league as the Pro 575's average. This is a case where the average score masks the true compute potential of the newer card.

Architecture Differences

The architectural gap between these two is enormous. The Pro 575 uses the Ellesmere chip built on GCN 4.0 architecture, manufactured on a 14 nm process at GlobalFoundries. The RX 7900 GRE uses the Navi 31 chip with RDNA 3.0 architecture, manufactured on a 5 nm process at TSMC. The process shrink is a major factor in the performance difference, but the chip design is even more significant.

The Pro 575 packs 5,700 million transistors on a 232 mm² die, giving a transistor density of 24.6M per mm². The RX 7900 GRE packs 57,700 million transistors on a 529 mm² die, with a density of 109.1M per mm². That is over ten times the transistor count and over four times the density. The RX 7900 GRE also has a much larger die area, which allows for far more compute units.

The Pro 575 has 2048 shading units, 128 texture mapping units, and 32 render output units. It has no dedicated ray tracing cores. The RX 7900 GRE has 5120 shading units, 320 TMUs, and 160 ROPs. It also has 80 ray tracing cores, a feature completely absent from the older card. This is a fundamental difference: the RX 7900 GRE can handle hardware-accelerated ray tracing, while the Pro 575 cannot.

Memory configurations are also vastly different. The Pro 575 has 4 GB of GDDR5 on a 256-bit bus, with memory clocked at 1695 MHz (6.8 Gbps effective) and bandwidth of 217.0 GB/s. The RX 7900 GRE has 16 GB of GDDR6 on the same 256-bit bus, but memory runs at 2250 MHz (18 Gbps effective), yielding 576.0 GB/s of bandwidth. The newer card has four times the capacity and over two and a half times the bandwidth.

The RX 7900 GRE also supports newer API features. It lists DirectX 12 Ultimate (12_2) and Vulkan 1.4, while the Pro 575 supports DirectX 12 (12_0) and Vulkan 1.3. Both support OpenGL 4.6. The RX 7900 GRE uses PCIe 4.0 x16, while the Pro 575 is limited to PCIe 3.0 x16.

FAQ

Q: Which card has more VRAM?

A: The AMD Radeon RX 7900 GRE has 16 GB of GDDR6 memory, while the AMD Radeon Pro 575 has 4 GB of GDDR5. The RX 7900 GRE also has higher memory bandwidth at 576.0 GB/s versus 217.0 GB/s for the Pro 575.

Q: Does the RX 7900 GRE support ray tracing?

A: Yes, the RX 7900 GRE has 80 ray tracing cores. The Radeon Pro 575 has no ray tracing cores, so it cannot perform hardware-accelerated ray tracing.

Q: How do their average benchmark scores compare?

A: The Radeon Pro 575 has an average benchmark score of 39555, while the RX 7900 GRE has an average of 32456. However, in the head-to-head Geekbench tests, the RX 7900 GRE wins decisively, scoring 175758 in OpenCL versus 34596 for the Pro 575, and 99850 in Vulkan versus 37878.

Q: What are the power requirements for each card?

A: The RX 7900 GRE has a TDP of 260 W, requires two 8-pin power connectors, and has a suggested PSU of 600 W. The Pro 575 has a TDP of 150 W and uses no external power connectors; it is an MXM module, which means power is delivered through the module slot.

Q: Which card is smaller?

A: The Pro 575 is an MXM module, so its physical size is not listed. The RX 7900 GRE is a dual-slot card measuring 276 mm in length, 110 mm in height, and 51 mm in width.

Q: What is the release timing difference?

A: The Radeon Pro 575 was released on June 4, 2017, and is end-of-life. The Radeon RX 7900 GRE was released on July 26, 2023, and is still an active product.

The Verdict

The data makes the choice clear for anyone who needs raw compute performance: the RX 7900 GRE is in a different class. Its Geekbench OpenCL score of 175758 is over five times the Pro 575's 34596, and its Vulkan score of 99850 is over 2.5 times the Pro 575's 37878. The RX 7900 GRE also has 16 GB of VRAM, 80 ray tracing cores, and a much newer architecture with RDNA 3.0 on a 5 nm process. The Pro 575 is limited to 4 GB of VRAM, has no ray tracing support, and uses older GCN 4.0 architecture on 14 nm. There is no benchmark category where the Pro 575 beats the RX 7900 GRE in the head-to-head data.

However, the average benchmark score story is more complicated. The Pro 575's average of 39555 is higher than the RX 7900 GRE's 32456, and the Pro 575 sits at a higher percentile (82nd versus 77th). This is because the RX 7900 GRE's average includes several very low PassMark scores for legacy DirectX versions (139 in DirectX 10, 300 in DirectX 11, 107 in DirectX 12, 310 in DirectX 9). Anyone choosing between these two should be aware that the RX 7900 GRE's raw compute power is far superior, but its average score is pulled down by old API benchmarks that do not reflect modern workloads.

For a modern gaming or compute workload, the RX 7900 GRE is the only sensible pick. For a system that relies on older APIs or has strict power constraints, the Pro 575's lower TDP of 150 W and lack of external power connectors could be relevant, but the performance gap is too large to recommend it for anything demanding.

Specification Differences

The key specification differences between the two cards are stark. The process node is 14 nm (GlobalFoundries) for the Pro 575 versus 5 nm (TSMC) for the RX 7900 GRE. Transistor count is 5,700 million versus 57,700 million. Die size is 232 mm² versus 529 mm². Transistor density is 24.6M per mm² versus 109.1M per mm².

Clock speeds: the Pro 575 has no listed base or boost clock, but memory runs at 1695 MHz (6.8 Gbps effective). The RX 7900 GRE has a base clock of 1287 MHz, a boost clock of 2245 MHz, a game clock of 1880 MHz, and memory at 2250 MHz (18 Gbps effective).

Memory: 4 GB GDDR5 with 217.0 GB/s bandwidth on the Pro 575 versus 16 GB GDDR6 with 576.0 GB/s on the RX 7900 GRE. Both use a 256-bit bus.

Compute units: the Pro 575 has 2048 shading units, 128 TMUs, and 32 ROPs. The RX 7900 GRE has 5120 shading units, 320 TMUs, and 160 ROPs, plus 80 ray tracing cores.

Rates: the Pro 575 has a pixel rate of 35.07 GPixel/s, texture rate of 140.3 GTexel/s, and FP32 performance of 4.489 TFLOPS. The RX 7900 GRE has a pixel rate of 359.2 GPixel/s, texture rate of 718.4 GTexel/s, and FP32 performance of 45.98 TFLOPS. FP16 is 4.489 TFLOPS (1:1) on the Pro 575 versus 91.96 TFLOPS (2:1) on the RX 7900 GRE.

Power and physical: the Pro 575 has a TDP of 150 W, is an MXM module, and has no power connectors. The RX 7900 GRE has a TDP of 260 W, is dual-slot, needs two 8-pin connectors, and suggests a 600 W PSU. The RX 7900 GRE measures 276 mm by 110 mm by 51 mm.

Bus and outputs: the Pro 575 uses PCIe 3.0 x16 and has portable device dependent outputs. The RX 7900 GRE uses PCIe 4.0 x16 and has 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C.

APIs: the Pro 575 supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3. The RX 7900 GRE supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Where Each One Wins

The RX 7900 GRE wins every head-to-head benchmark recorded. It is the clear choice for modern compute workloads, high-resolution gaming, ray tracing, and any application that can leverage its 5120 shading units, 80 ray tracing cores, or 16 GB of VRAM. Its FP32 performance of 45.98 TFLOPS is over ten times the Pro 575's 4.489 TFLOPS. Its pixel rate of 359.2 GPixel/s and texture rate of 718.4 GTexel/s dwarf the Pro 575's 35.07 GPixel/s and 140.3 GTexel/s. For anyone running current games, GPU-accelerated rendering, or machine learning tasks, the RX 7900 GRE is the only rational option.

The Pro 575 does have a niche. Its average benchmark score of 39555 is higher than the RX 7900 GRE's 32456, and it ranks higher in overall percentile (82nd versus 77th). This suggests that in workloads using older DirectX versions (the RX 7900 GRE scores only 139 in DirectX 10 and 107 in DirectX 12 on PassMark), the Pro 575 may actually perform relatively better. Its lower TDP of 150 W and lack of external power connectors make it more suitable for constrained systems, such as the MXM-based Mac Pro modules it was designed for. For legacy software compatibility or power-limited embedded use, the Pro 575 remains a viable part, but only in that narrow context. For everything else, the RX 7900 GRE is the decisive winner.