AMD Radeon RX 7900M vs Intel Arc Pro B390 Comparison

The Verdict

The recorded data positions the AMD Radeon RX 7900M as a high-mobility graphics solution with a 94th percentile standing against all GPUs, while the Intel Arc Pro B390 sits at the 50th percentile. The RX 7900M carries an average benchmark score of 97487, while the Arc Pro B390 has no recorded benchmark scores and an average score of zero in the database. This indicates the AMD part is the only one of the two with verified performance data, making it the clear choice for any workload where measured output matters.

The RX 7900M targets users who need substantial compute throughput in a portable form factor. Its dataset shows a 180 W TDP, 38.52 TFLOPS FP32 performance, and 16 GB of dedicated GDDR6 memory. The Arc Pro B390, by contrast, operates at an 80 W TDP, delivers 7.680 TFLOPS FP32, and relies entirely on system shared memory. The data confirms the AMD solution is for demanding graphics and compute tasks, while the Intel part is a lower-power integrated option suited to basic professional workloads.

Architecture Differences

The RX 7900M uses the Navi 31 chip built on RDNA 3.0 architecture, produced on a 5 nm process at TSMC. It carries the codename Plum Bonito and belongs to the Navi Mobile generation (RX 7000M). The chip integrates 57,700 million transistors across a 529 mm² die, yielding a transistor density of 109.1M per mm². The Arc Pro B390 uses the Panther Lake chip with Xe3-LPG architecture, fabricated on Intel's 3 nm process. Its transistor count and die size are listed as unknown in the database, and its generation is labeled Arc Graphics-WM (Panther Lake).

The RX 7900M packs 4608 shading units, 288 texture mapping units, 192 ROPs, and 72 ray tracing cores. The Arc Pro B390 contains 1536 shading units, 48 TMUs, 24 ROPs, and 12 ray tracing cores. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RX 7900M connects via PCIe 4.0 x16, while the Arc Pro B390 uses an integrated graphics path with no bus interface beyond IGP. Both are classified as IGP slot width with no power connectors. The RX 7900M's predecessor is Polaris Mobile, and the Arc Pro B390's predecessor is HD Graphics-WM. The RX 7900M released on 2023-10-18, and the Arc Pro B390 released on 2026-01-26.

FAQ

Q: Which GPU has the higher FP32 compute throughput?

A: The AMD Radeon RX 7900M delivers 38.52 TFLOPS FP32, which is approximately five times the 7.680 TFLOPS of the Intel Arc Pro B390.

Q: How much memory does each GPU have?

A: The RX 7900M has 16 GB of GDDR6 memory on a 256-bit bus with 576.0 GB/s bandwidth. The Arc Pro B390 uses system shared memory, with bandwidth listed as system dependent.

Q: What are the power requirements of each GPU?

A: The RX 7900M has a 180 W TDP, while the Arc Pro B390 has an 80 W TDP. Neither has a suggested PSU listed in the database.

Q: Which GPU has a higher boost clock?

A: The Intel Arc Pro B390 boosts to 2500 MHz, which is higher than the RX 7900M's 2090 MHz boost clock. However, the RX 7900M has a much higher base clock at 1825 MHz versus 300 MHz.

Q: Do both GPUs support ray tracing?

A: Yes, both support ray tracing. The RX 7900M has 72 ray tracing cores, and the Arc Pro B390 has 12 ray tracing cores.

Q: Which GPU has a better standing among all GPUs?

A: The RX 7900M sits at the 94th percentile, while the Arc Pro B390 sits at the 50th percentile. The RX 7900M also has an average benchmark score of 97487, whereas the Arc Pro B390 has no recorded scores.

Specification Differences

The two GPUs differ across nearly every measurable specification. The RX 7900M uses a 5 nm TSMC process with 57,700 million transistors on a 529 mm² die. The Arc Pro B390 uses a 3 nm Intel process with unknown transistor count and die size. The RX 7900M has a base clock of 1825 MHz and a boost clock of 2090 MHz. The Arc Pro B390 has a base clock of 300 MHz and a boost clock of 2500 MHz. Memory clock for the RX 7900M is 2250 MHz with 18 Gbps effective, while the Arc Pro B390 relies on system shared memory.

Compute resources differ sharply: the RX 7900M has 4608 shading units, 288 TMUs, 192 ROPs, and 72 RT cores. The Arc Pro B390 has 1536 shading units, 48 TMUs, 24 ROPs, and 12 RT cores. Pixel rate on the RX 7900M is 401.3 GPixel/s versus 60.00 GPixel/s on the Intel part. Texture rate is 601.9 GTexel/s versus 120.0 GTexel/s. FP32 throughput is 38.52 TFLOPS against 7.680 TFLOPS, and FP16 is 77.05 TFLOPS against 15.36 TFLOPS. The RX 7900M draws 180 W, the Arc Pro B390 draws 80 W. The RX 7900M uses PCIe 4.0 x16, and the Arc Pro B390 uses an IGP bus interface. Both have IGP slot width and no power connectors. Display outputs are portable device dependent for both.

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark entries between these two GPUs. However, the available recorded measurements for the RX 7900M provide a basis for comparison. In 3DMark Steel Nomad DX12, the RX 7900M scores 4201. In Geekbench OpenCL, it scores 129499, and in Geekbench Vulkan, it scores 158760. These are the only benchmark results in the database for either product.

The RX 7900M's nearest rivals in the database are all professional workstation cards. It sits 0.4% ahead of the AMD Radeon Pro VII, which has an average score of 97131. It trails the NVIDIA Quadro RTX 6000 by 4.3%, with that card scoring 101872. The RX 7900M leads the AMD Radeon Instinct MI60 by 5.4%, as that card scores 92466. It also leads the NVIDIA RTX A4500 by 6.3%, with that card at 91671. These deltas place the RX 7900M in the upper tier of mobile graphics solutions, between professional workstation cards in average score.

The Arc Pro B390 has no benchmark entries, no nearest rivals, and no average score. Its 50th percentile ranking is the only positional data available. The absence of measured results means no direct performance comparison can be drawn from the database. The RX 7900M's average benchmark score of 97487 stands as the sole quantitative performance anchor between the two.

Where Each One Wins

The RX 7900M wins in every category where the database has recorded data. It delivers 38.52 TFLOPS FP32, which is 5.0 times the Arc Pro B390's 7.680 TFLOPS. Its pixel rate of 401.3 GPixel/s is 6.7 times higher than 60.00 GPixel/s. Its texture rate of 601.9 GTexel/s is 5.0 times higher than 120.0 GTexel/s. It has 3.0 times the shading units, 6.0 times the TMUs, 8.0 times the ROPs, and 6.0 times the ray tracing cores of the Intel part. The RX 7900M's 16 GB of GDDR6 with 576.0 GB/s bandwidth provides dedicated memory resources, while the Arc Pro B390 depends on system shared memory.

The RX 7900M also wins on standing: 94th percentile versus 50th, with an average score of 97487 versus zero. Its nearest rivals include professional workstation GPUs, and it outperforms two of them in average score. The AMD part is the only one with any benchmark results in the database, covering DX12, OpenCL, and Vulkan workloads.

The Arc Pro B390 wins in power efficiency and clock speed. Its 80 W TDP is 100 W lower than the RX 7900M's 180 W TDP. Its boost clock of 2500 MHz exceeds the RX 7900M's 2090 MHz, though its base clock of 300 MHz is far lower. The Intel part uses a smaller 3 nm process node, which may contribute to its lower power draw. For tasks that require minimal power consumption and can rely on system shared memory, the Arc Pro B390's lower TDP is the only measurable advantage it holds over the RX 7900M in the recorded data. The RX 7900M is the stronger choice for any workload that needs dedicated memory bandwidth, high compute throughput, or verified benchmark performance.