Intel Arc B390 vs Intel Arc Graphics 128EU Mobile Comparison

Head-to-Head Benchmarks

The recorded data shows only one direct benchmark score for the Intel Arc B390. It posts 1482 points in 3DMark Steel Nomad (DX12). The Intel Arc Graphics 128EU Mobile has no benchmark entries in the database, so its average score is zero. Direct numerical comparison is therefore limited. The Arc B390 places in the 9th percentile among all GPUs. Its nearest rivals include the NVIDIA GeForce GT 520MX at 1463 points, a 1.3% difference, and the NVIDIA GeForce 800M at 1460 points, a 1.5% difference. The Arc B390 leads both by small margins. It also sits ahead of the NVIDIA GeForce GT 625 OEM, which scores 1446 points, a 2.5% gap, and the NVIDIA GeForce GT 710 at 1443 points, a 2.7% gap. These deltas are narrow, indicating that the Arc B390 operates in a performance tier populated by older discrete entry-level parts despite being an integrated processor.

The Arc Graphics 128EU Mobile cannot be scored against the B390 directly because the database holds no measurements for it. The 128EU Mobile does appear in the 50th percentile across all GPUs, which suggests its recorded performance class, based on the database's broader ranking, sits far above the B390's 9th percentile placement. However, without a concrete benchmark score, the percentile cannot be converted into a numeric delta. The B390's single result is the only hard number available for head-to-head analysis. Its 7.680 TFLOPS FP32 rate and 15.36 TFLOPS FP16 rate indicate a compute capability that is about 1.67 times the 128EU Mobile's 4.608 TFLOPS FP32 and 9.216 TFLOPS FP16 figures. The B390's boost clock reaches 2500 MHz versus 2250 MHz for the 128EU Mobile, a 250 MHz advantage. That clock gap, combined with 1536 shading units against 1024, explains why the B390's theoretical throughput is higher, even though its pixel and texture rates are lower.

Architecture Differences

The two GPUs share the Xe-LPG architecture family, but they belong to different generations and use different underlying chips. The Intel Arc B390 is built on the Panther Lake chip and uses the Xe3-LPG architecture, while the Intel Arc Graphics 128EU Mobile is built on the Meteor Lake chip and uses the Xe-LPG architecture. The B390 belongs to the Arc Graphics-M (Panther Lake) generation, and the 128EU Mobile belongs to the Arc Graphics-M (Meteor Lake) generation. The B390 is fabricated on a 3 nm process at Intel, whereas the 128EU Mobile uses a 10 nm process at Intel. That process difference is substantial and contributes to the B390's higher boost clock and larger shading unit count at a higher TDP.

The B390 carries 1536 shading units, 48 texture mapping units, and 24 raster output pipelines. The 128EU Mobile has 1024 shading units, 64 texture mapping units, and 32 raster output pipelines. Despite having fewer shading units, the 128EU Mobile has more TMUs and ROPs, which yields higher pixel and texture fill rates: 72.00 GPixel/s and 144.0 GTexel/s for the 128EU Mobile versus 60.00 GPixel/s and 120.0 GTexel/s for the B390. The B390 includes 12 ray tracing cores, while the 128EU Mobile lists no RT core count in the database. Neither part lists tensor cores. Both use system-shared memory with a system-dependent bandwidth and a system-shared bus width.

The B390 supports DirectX 12 Ultimate (12_2), while the 128EU Mobile supports DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4. The B390's DirectX 12_2 feature level indicates support for newer rendering features, while the 128EU Mobile's 12_1 level is a step below. The B390 has a TDP of 80 W and uses no power connectors, with an IGP slot width and IGP bus interface. The 128EU Mobile has a TDP of 28 W, also uses an IGP slot width, and connects via a Ring Bus interface. The B390's release date is 2026-01-26, and the 128EU Mobile's release date is 2023-12-13. The 128EU Mobile lists its predecessor as HD Graphics-M; the B390 lists no predecessor. Both are marked as Active in production status.

FAQ

Q: Which GPU has the higher boost clock?

A: The Intel Arc B390 has a boost clock of 2500 MHz, which is 250 MHz higher than the Intel Arc Graphics 128EU Mobile's boost clock of 2250 MHz. Both have a base clock of 300 MHz.

Q: Does the Intel Arc B390 have more shading units?

A: Yes. The B390 has 1536 shading units, while the Intel Arc Graphics 128EU Mobile has 1024 shading units. The B390 also has 12 ray tracing cores, whereas the 128EU Mobile lists no RT core count.

Q: Why does the Intel Arc Graphics 128EU Mobile have a higher pixel rate?

A: The 128EU Mobile has 32 ROPs and 64 TMUs, compared to the B390's 24 ROPs and 48 TMUs. As a result, the 128EU Mobile reaches 72.00 GPixel/s and 144.0 GTexel/s, while the B390 reaches 60.00 GPixel/s and 120.0 GTexel/s.

Q: What DirectX feature levels do the two GPUs support?

A: The Intel Arc B390 supports DirectX 12 Ultimate (12_2). The Intel Arc Graphics 128EU Mobile supports DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4.

Q: Which GPU has the higher TDP?

A: The Intel Arc B390 has an 80 W TDP, while the Intel Arc Graphics 128EU Mobile has a 28 W TDP. The B390's TDP is 52 W higher.

Q: Are there any benchmark scores for the Intel Arc Graphics 128EU Mobile?

A: No. The database contains no benchmark entries for the 128EU Mobile, so its average benchmark score is recorded as zero. The Intel Arc B390 has one score of 1482 in 3DMark Steel Nomad (DX12).

Specification Differences

The two GPUs differ in several recorded fields. The B390 uses a 3 nm process node, while the 128EU Mobile uses 10 nm. The B390's architecture is Xe3-LPG on the Panther Lake chip, and the 128EU Mobile's architecture is Xe-LPG on the Meteor Lake chip. The generations differ: Arc Graphics-M (Panther Lake) for the B390 and Arc Graphics-M (Meteor Lake) for the 128EU Mobile. The B390 has 1536 shading units, 48 TMUs, 24 ROPs, and 12 RT cores. The 128EU Mobile has 1024 shading units, 64 TMUs, and 32 ROPs, with no RT core count listed. Boost clocks are 2500 MHz for the B390 and 2250 MHz for the 128EU Mobile. Pixel rates are 60.00 GPixel/s for the B390 and 72.00 GPixel/s for the 128EU Mobile. Texture rates are 120.0 GTexel/s for the B390 and 144.0 GTexel/s for the 128EU Mobile. FP32 throughput is 7.680 TFLOPS for the B390 and 4.608 TFLOPS for the 128EU Mobile. FP16 throughput is 15.36 TFLOPS (2:1) for the B390 and 9.216 TFLOPS (2:1) for the 128EU Mobile. TDP is 80 W for the B390 and 28 W for the 128EU Mobile. The B390 uses an IGP bus interface, while the 128EU Mobile uses a Ring Bus interface. DirectX support differs: 12 Ultimate (12_2) for the B390 and 12 (12_1) for the 128EU Mobile. Release dates differ: 2026-01-26 for the B390 and 2023-12-13 for the 128EU Mobile. The 128EU Mobile lists its predecessor as HD Graphics-M; the B390 lists none. The B390 has one benchmark score (1482), while the 128EU Mobile has none.

The Verdict

The data indicates two very different design targets. The Intel Arc B390 is a newer, higher-power integrated GPU with more shading units, a higher boost clock, more FP32 and FP16 throughput, and DirectX 12 Ultimate support. Its single recorded benchmark score of 1482 places it just ahead of several older NVIDIA parts, with deltas of 1.3% to 2.7%. The Intel Arc Graphics 128EU Mobile, despite having no recorded benchmark, is positioned in the 50th percentile of all GPUs, which is far above the B390's 9th percentile. That percentile gap suggests the 128EU Mobile is the stronger performer in the database's overall ranking, even though the B390 has higher raw compute numbers.

The 128EU Mobile also offers higher pixel and texture fill rates, 72.00 GPixel/s and 144.0 GTexel/s, respectively, due to more ROPs and TMUs. It consumes 28 W versus 80 W, making it the more power-efficient part by TDP. The B390's advantage lies in shading throughput, ray tracing cores, and the newer 3 nm process. Buyers prioritizing compute density and modern DirectX features would favor the B390. Buyers prioritizing fill rate and power efficiency would favor the 128EU Mobile. Neither part has a launch MSRP listed in the database.

Where Each One Wins

The Intel Arc B390 wins on shading capacity. It has 1536 shading units and 12 RT cores, and it reaches 7.680 TFLOPS FP32 and 15.36 TFLOPS FP16. Those figures are 1.67 times the 128EU Mobile's FP32 and FP16 throughput. The B390 also wins on clock speed, with a 2500 MHz boost versus 2250 MHz, and on API feature level, supporting DirectX 12 Ultimate (12_2) compared to DirectX 12 (12_1) for the 128EU Mobile. Its 3 nm process node indicates a newer manufacturing generation. Its 80 W TDP allows more headroom for sustained compute workloads.

The Intel Arc Graphics 128EU Mobile wins on fill rate. With 64 TMUs and 32 ROPs, it posts 144.0 GTexel/s and 72.00 GPixel/s, both higher than the B390's 120.0 GTexel/s and 60.00 GPixel/s. It also wins on power efficiency by TDP, drawing 28 W versus 80 W. Its 50th percentile ranking among all GPUs, versus the B390's 9th percentile, indicates the database places it in a higher overall performance class, despite the absence of a direct benchmark score. The 128EU Mobile also has a predecessor, HD Graphics-M, and an earlier release date of 2023-12-13, while the B390 was released on 2026-01-26.

For rasterization-heavy tasks that depend on pixel and texture output, the 128EU Mobile has the recorded advantage. For compute-heavy tasks that depend on shading units and FP32/FP16 throughput, the B390 has the recorded advantage. The single benchmark result for the B390 shows it competing closely with NVIDIA GT 520MX, 800M, GT 625 OEM, and GT 710, all within 1.3% to 2.7%. No comparable direct result exists for the 128EU Mobile, so its fill-rate and percentile advantages stand as the only measurable wins.