AMD Radeon RX 7900 GRE vs AMD Radeon RX Vega M GH Comparison

Head-to-Head Benchmarks

The benchmark database records two shared test results for these GPUs, and the AMD Radeon RX 7900 GRE wins both by decisive margins. In Geekbench OpenCL, the RX 7900 GRE scores 175,758 against the RX Vega M GH's 27,125, a 548% advantage. That is not a marginal gap; it is a generational chasm in raw compute throughput. The Vulkan result is similarly one-sided, with the RX 7900 GRE posting 99,850 versus 31,268 for the Vega M GH, a 219.3% lead. Every head-to-head win belongs to the RX 7900 GRE, and the database records zero wins for the RX Vega M GH.

The magnitude of these deltas matters more than the simple win count. A 548% delta in OpenCL indicates the RX 7900 GRE delivers over six times the compute performance of the Vega M GH in that workload. For Vulkan, the 219.3% delta means the RX 7900 GRE is more than three times faster. These are not close contests where architectural nuances tip the balance; they are outright sweeps. The average benchmark score for the RX 7900 GRE is 32,456, while the Vega M GH averages 29,197. That overall average gap of roughly 11% is far smaller than the head-to-head deltas, because the average includes a broader set of tests, several of which the Vega M GH does not participate in.

The RX 7900 GRE's percentile ranking among all GPUs is 77, placing it above the 77% mark of the overall distribution. The Vega M GH sits at percentile 74. Despite the massive head-to-head wins, the percentile difference is only 3 points, which reflects how the database's full GPU population includes many high-end parts that neither of these cards can match. Within their own nearest rival groups, the RX 7900 GRE is essentially tied with the AMD FirePro S10000 (0.2% delta) and the AMD FirePro S9300 X2 (-0.3% delta), while trailing the AMD Radeon RX 590 GME by 0.4% and leading the AMD Radeon Pro 570X by 0.9%. The Vega M GH's nearest rivals include the AMD FirePro W8000 (0% delta), Intel Arc A370M (0.1% delta), AMD Radeon RX 470 (0.7% delta), and AMD Radeon RX 6800M (1.1% delta). These tight clusters show that, in the database's overall scoring, both cards sit in competitive bands, but the head-to-head tests reveal the RX 7900 GRE's overwhelming superiority on the two workloads where both were measured.

Architecture Differences

The two GPUs come from different eras and different design philosophies. The RX 7900 GRE is built on the RDNA 3.0 architecture using the Navi 31 chip, codenamed Plum Bonito, part of the Navi III (RX 7000) generation. It is fabricated on a 5 nm process at TSMC, with 57,700 million transistors packed into a 529 mm² die, giving a transistor density of 109.1M per mm². The RX Vega M GH uses the older GCN 4.0 architecture with the Polaris 22 chip, part of the Vega (Vega M) generation. It is built on a 14 nm process at GlobalFoundries, with 5,000 million transistors on a 208 mm² die, for a density of 24.0M per mm². That is a 14 nm versus 5 nm process gap, and the RX 7900 GRE crams more than 11 times the transistors into roughly 2.5 times the die area.

The memory subsystems diverge sharply as well. The RX 7900 GRE ships with 16 GB of GDDR6 on a 256 bit bus, delivering 576.0 GB/s of bandwidth. The RX Vega M GH has 4 GB of HBM2 on a 1024 bit bus, but only 204.8 GB/s of bandwidth. The wider bus on the Vega M GH cannot compensate for the much lower memory clock and smaller capacity. The RX 7900 GRE's memory runs at 2250 MHz (18 Gbps effective), while the Vega M GH's memory runs at 800 MHz (1600 Mbps effective). In raw bandwidth, the RX 7900 GRE leads by a factor of 2.8.

Compute resources follow the same pattern. The RX 7900 GRE has 5,120 shading units, 320 texture mapping units, 160 ROPs, and 80 ray tracing cores. The RX Vega M GH has 1,536 shading units, 96 TMUs, and 64 ROPs, with no ray tracing cores at all. The RX 7900 GRE's pixel rate is 359.2 GPixel/s versus 76.16 GPixel/s for the Vega M GH. Its texture rate is 718.4 GTexel/s versus 114.2 GTexel/s. Floating point performance stands at 45.98 TFLOPS for the RX 7900 GRE versus 3.656 TFLOPS for the Vega M GH. The RX 7900 GRE also supports FP16 at 91.96 TFLOPS (2:1 ratio), while the Vega M GH's FP16 is 3.656 TFLOPS (1:1 ratio), meaning no FP16 acceleration advantage.

Clock speeds differ as well, though the architecture gap matters more. The RX 7900 GRE has a base clock of 1287 MHz and a boost of 2245 MHz, with a game clock of 1880 MHz. The Vega M GH has a base of 1063 MHz and a boost of 1190 MHz. The RX 7900 GRE's boost clock is nearly double the Vega M GH's. Power consumption reflects the performance gap: the RX 7900 GRE has a TDP of 260 W and requires a 600 W suggested PSU with dual 8-pin connectors, while the Vega M GH is a 100 W integrated GPU (IGP) with no external power connectors. The RX 7900 GRE is a dual-slot card at 276 mm length, 110 mm height, and 51 mm width, whereas the Vega M GH is an IGP with no dimensions recorded, designed for portable devices. The RX 7900 GRE uses PCIe 4.0 x16, while the Vega M GH is an IGP bus interface.

API support also differs. The RX 7900 GRE supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The Vega M GH supports DirectX 12 (12_0), OpenGL 4.6, and Vulkan 1.3. The RX 7900 GRE's DirectX 12 Ultimate tier includes features the older GCN card lacks. Display outputs differ too: the RX 7900 GRE has 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C, while the Vega M GH's outputs are listed as "Portable Device Dependent." The RX 7900 GRE's release date is 2023-07-26, and it remains in active production, while the Vega M GH launched 2018-01-31 and is end-of-life.

The Verdict

The data points to a single conclusion: the AMD Radeon RX 7900 GRE is the superior GPU by every measured metric. It wins both head-to-head benchmarks, leads in every architectural specification, and holds a higher average benchmark score. The RX 7900 GRE's 548% OpenCL lead and 219.3% Vulkan lead are not subtle advantages; they represent completely different performance classes. Anyone choosing between these two for compute-heavy or graphics-heavy workloads should select the RX 7900 GRE without hesitation.

The Vega M GH is not without context. Its percentile rank of 74 versus the RX 7900 GRE's 77 shows that, relative to the full GPU database, the Vega M GH is not a weak part by historical standards. Its nearest rivals include the AMD Radeon RX 470 and the Intel Arc A370M, and it essentially ties the AMD FirePro W8000. But the RX 7900 GRE's nearest rivals include the AMD FirePro S10000 and S9300 X2, which are far above the Vega M GH's competitive set. The Vega M GH's 100 W TDP and IGP form factor make it suitable for portable, low-power systems, but those constraints come at a massive performance cost.

The RX 7900 GRE's 16 GB VRAM versus 4 GB, its 576.0 GB/s bandwidth versus 204.8 GB/s, and its 45.98 TFLOPS versus 3.656 TFLOPS all point the same way. The launch MSRP of 549 USD for the RX 7900 GRE is a single data point, but the performance gap dwarfs any price consideration. The Vega M GH has no recorded launch MSRP, and it is end-of-life. For any new build or upgrade, the RX 7900 GRE is the only rational choice from this comparison.

FAQ

Q: Which GPU wins in Geekbench OpenCL?

A: The AMD Radeon RX 7900 GRE scores 175,758 versus 27,125 for the RX Vega M GH, a 548% advantage.

Q: How much faster is the RX 7900 GRE in Vulkan?

A: The RX 7900 GRE scores 99,850 against 31,268 for the Vega M GH, a 219.3% lead.

Q: What is the memory capacity difference?

A: The RX 7900 GRE has 16 GB of GDDR6 on a 256 bit bus with 576.0 GB/s bandwidth. The Vega M GH has 4 GB of HBM2 on a 1024 bit bus with 204.8 GB/s bandwidth.

Q: Do both GPUs support ray tracing?

A: No. The RX 7900 GRE has 80 ray tracing cores, while the RX Vega M GH has no ray tracing cores.

Q: What are the TDP figures?

A: The RX 7900 GRE has a TDP of 260 W with a suggested 600 W PSU. The Vega M GH has a TDP of 100 W and is an integrated GPU with no PSU suggestion.

Q: Which GPU has a higher average benchmark score?

A: The RX 7900 GRE averages 32,456, while the Vega M GH averages 29,197. The RX 7900 GRE also ranks at percentile 77 versus the Vega M GH's percentile 74.

Where Each One Wins

The RX 7900 GRE wins in every scenario that requires raw performance. For 3D rendering, high-resolution gaming, compute workloads, or any task that stresses the GPU, the 5120 shading units, 45.98 TFLOPS, and 576.0 GB/s bandwidth make it the clear choice. Its 80 ray tracing cores enable hardware-accelerated ray tracing, which the Vega M GH cannot do at all. The 16 GB VRAM capacity is sufficient for large textures and datasets, while the Vega M GH's 4 GB would be a hard limit. The 5 nm process and RDNA 3.0 architecture provide a modern feature set including DirectX 12 Ultimate and Vulkan 1.4. For desktop builds with a 600 W PSU and dual 8-pin connectors, the RX 7900 GRE is the dominant option.

The Vega M GH has a narrower set of advantages. Its 100 W TDP and IGP form factor mean it requires no external power connectors and fits into portable devices. It operates at 1063 MHz base and 1190 MHz boost, which is modest, but the entire package is designed for low-power, integrated systems. The 1024 bit memory bus is wide, but the 204.8 GB/s bandwidth and 4 GB capacity limit its usefulness. Its GCN 4.0 architecture and 14 nm process are old, and its production status is end-of-life. The Vega M GH's only realistic win scenario is in a portable device where the RX 7900 GRE cannot physically fit and where power draw must stay at 100 W or below. Even then, the RX 7900 GRE's performance advantage is so large that any system that can accommodate it should choose it instead. In the database's recorded data, the RX 7900 GRE wins 2 head-to-head benchmarks, and the Vega M GH wins 0. That is the entire story.