Intel Arc Pro B390 vs Intel UHD Graphics 770 Mobile Comparison

Head-to-Head Benchmarks

The recorded data contains no direct head-to-head benchmark scores for the Intel Arc Pro B390 versus the Intel UHD Graphics 770 Mobile. Both entries list empty benchmark arrays, zero wins for either side, and an average benchmark score of zero. The percentile versus all GPUs is identical at 50 for both parts, placing them at the median of the database distribution despite the absence of measured workloads.

Without measured frame rates or synthetic scores, the comparison must rely on the theoretical throughput ceilings derived from the clock and shader specifications. The Arc Pro B390 computes a peak FP32 rate of 7.680 TFLOPS, which is 9.4 times the 819.2 GFLOPS recorded for the UHD Graphics 770 Mobile. That ratio comes directly from the specification fields: 7,680 divided by 819.2 equals 9.375. The texture rate gap is similar, with the Arc Pro B390 delivering 120.0 GTexel/s against 25.60 GTexel/s for the UHD 770, a factor of 4.7. Pixel throughput favors the Arc Pro B390 at 60.00 GPixel/s versus 12.80 GPixel/s, a 4.7 times advantage.

The FP16 comparison shows a narrower relative gap. The Arc Pro B390 reaches 15.36 TFLOPS at a 2:1 ratio, while the UHD Graphics 770 Mobile reaches 1.638 TFLOPS at the same 2:1 ratio. That is a 9.4 times difference, matching the FP32 ratio because both architectures implement a consistent FP32 to FP16 conversion rate. The boost clock difference contributes directly to these figures: the Arc Pro B390 boosts to 2500 MHz, the UHD 770 to 1600 MHz. Base clocks match at 300 MHz for both, so the entire throughput separation comes from the shader count and the higher boost clock.

The Arc Pro B390 carries 1536 shading units, 48 texture mapping units, and 24 raster output units. The UHD Graphics 770 Mobile has 256 shading units, 16 TMUs, and 8 ROPs. Multiplying the shading unit advantage (6.0 times) by the clock advantage (1.56 times) accounts for the 9.4 times FP32 gap. The texture unit advantage is 3.0 times, and when multiplied by the same clock ratio, the 4.7 times texture rate difference appears. The ROP advantage is also 3.0 times, producing the identical 4.7 times pixel rate gap.

FAQ

Q: Which GPU has the higher boost clock?

A: The Intel Arc Pro B390 boosts to 2500 MHz, while the Intel UHD Graphics 770 Mobile boosts to 1600 MHz. The base clock is identical at 300 MHz for both parts.

Q: How do the shading unit counts compare?

A: The Arc Pro B390 has 1536 shading units, which is 6 times the 256 shading units found on the UHD Graphics 770 Mobile.

Q: Does the Arc Pro B390 support ray tracing?

A: Yes, the Arc Pro B390 includes 12 ray tracing cores. The UHD Graphics 770 Mobile has no ray tracing cores listed in the database.

Q: What DirectX versions do these GPUs support?

A: The Arc Pro B390 supports DirectX 12 Ultimate (12_2), while the UHD Graphics 770 Mobile supports DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4.

Q: What is the TDP difference?

A: The Arc Pro B390 has a TDP of 80 W, and the UHD Graphics 770 Mobile has a TDP of 15 W.

Q: Are these integrated or discrete GPUs?

A: Both are integrated graphics processors. The Arc Pro B390 uses an IGP slot width and bus interface, and the UHD Graphics 770 Mobile also uses IGP slot width with a Ring Bus interface.

Architecture Differences

The two GPUs come from different Intel architecture generations. The Arc Pro B390 is built on the Xe3-LPG architecture under the Arc Graphics-WM (Panther Lake) generation. The UHD Graphics 770 Mobile uses Generation 12.2 under the HD Graphics-M (Raptor Lake) generation. The process node separates them sharply: the Arc Pro B390 uses a 3 nm process, while the UHD Graphics 770 Mobile uses a 10 nm process. Both are fabricated by Intel.

The chip identities reveal the platform split. The Arc Pro B390 uses the Panther Lake chip, and the UHD Graphics 770 Mobile uses the Raptor Lake chip. The Arc Pro B390 lists its predecessor as HD Graphics-WM, while the UHD Graphics 770 Mobile lists its successor as Arc Graphics-M. The UHD Graphics 770 Mobile has no predecessor listed in the database, and the Arc Pro B390 has no successor listed.

Ray tracing support marks a clear architectural divergence. The Arc Pro B390 includes 12 dedicated ray tracing cores, which aligns with the DirectX 12 Ultimate feature set. The UHD Graphics 770 Mobile has no ray tracing cores and stops at DirectX 12 (12_1), lacking the Ultimate feature level. Both parts support OpenGL 4.6 and Vulkan 1.4, so the API gap concentrates on the DirectX tier.

Memory handling is identical in structure. Both use System Shared memory with System Shared size, type, and bus width. Bandwidth is System Dependent for both, meaning the peak transfer rate varies with the host platform rather than being fixed by the GPU. The clock specifications list "System Shared" for memory clock on both parts, confirming that neither has dedicated video memory.

The bus interface differs. The Arc Pro B390 uses IGP, while the UHD Graphics 770 Mobile uses Ring Bus. Both are integrated parts with no power connectors, and the Arc Pro B390 lists its power connectors as "None" while the UHD Graphics 770 Mobile has a null entry for that field.

Specification Differences

The specification table shows several fields where the two parts diverge. Process node: 3 nm for the Arc Pro B390 versus 10 nm for the UHD Graphics 770 Mobile. Boost clock: 2500 MHz versus 1600 MHz. Shading units: 1536 versus 256. Texture mapping units: 48 versus 16. Raster output units: 24 versus 8. Ray tracing cores: 12 versus none.

Throughput figures differ by fixed ratios. Pixel rate: 60.00 GPixel/s versus 12.80 GPixel/s. Texture rate: 120.0 GTexel/s versus 25.60 GTexel/s. FP32: 7.680 TFLOPS versus 819.2 GFLOPS. FP16: 15.36 TFLOPS versus 1.638 TFLOPS, both at a 2:1 ratio.

TDP differs by 65 W: 80 W for the Arc Pro B390, 15 W for the UHD Graphics 770 Mobile. The bus interface differs as noted, and the DirectX version differs between 12 Ultimate (12_2) and 12 (12_1). Release dates are far apart: the Arc Pro B390 has a release date of 2026-01-26, and the UHD Graphics 770 Mobile has a release date of 2023-01-03.

Fields that match include base clock at 300 MHz, memory configuration as System Shared across size, type, and bus width, bandwidth as System Dependent, slot width as IGP for both, display outputs as Portable Device Dependent for both, OpenGL at 4.6, Vulkan at 1.4, production status as Active, and manufacturer as Intel. The transistor count and die size are unknown for the Arc Pro B390 and absent for the UHD Graphics 770 Mobile in the database.

The Verdict

The recorded specifications show the Intel Arc Pro B390 as the stronger part in every measured throughput category. Its FP32 output of 7.680 TFLOPS exceeds the UHD Graphics 770 Mobile by a factor of 9.4, and its ray tracing cores provide a capability the UHD 770 lacks entirely. The DirectX 12 Ultimate support reinforces that advantage for workloads that use the full DirectX feature set.

The UHD Graphics 770 Mobile holds advantages only in power consumption and release timing. Its 15 W TDP is one-fifth of the Arc Pro B390's 80 W, which makes it suited to platforms with strict thermal and power budgets. Its earlier release date of 2023-01-03 indicates a longer market presence, but the database shows no benchmark scores to quantify any maturity advantage.

The choice between the two depends on the workload. For tasks that stress shading, texturing, or ray tracing, the Arc Pro B390 delivers a clear throughput advantage. For systems where power draw is the binding constraint, the UHD Graphics 770 Mobile consumes far less. The identical base clock of 300 MHz means idle behavior may be similar, but the boost clock difference of 900 MHz drives the performance separation under load.

Both parts use System Shared memory, so the host platform's memory bandwidth will influence real-world results. The database lists bandwidth as System Dependent for both, meaning neither GPU can be evaluated in isolation from its system memory configuration. The Arc Pro B390's higher compute rates will require sufficient memory bandwidth to materialize, while the UHD 770's lower rates place less demand on the memory subsystem.

The 50th percentile ranking for both GPUs in the database indicates that, without measured benchmarks, neither part has demonstrated a position above or below the median. The empty benchmark arrays and zero average scores mean the theoretical specifications are the only basis for comparison. The data supports the Arc Pro B390 for compute-heavy integrated graphics workloads and the UHD Graphics 770 Mobile for power-constrained integrated graphics deployments.