Intel Arc B770 vs NVIDIA GeForce RTX 4090 Mobile Comparison

The Verdict

The data separates these two clearly by use case. The Intel Arc B770 is a desktop part built around raw compute density and a wide memory bus, while the NVIDIA GeForce RTX 4090 Mobile is a laptop part optimized for efficiency and portability. The RTX 4090 Mobile holds the only recorded benchmark in the database, an average score of 43,667, placing it at the 84th percentile of all GPUs. The Arc B770 has no recorded benchmark scores and sits at the 50th percentile, which means the database currently has no direct measurement of its real-world performance. For anyone choosing between these, the RTX 4090 Mobile is the option with verified performance data, while the Arc B770 is a specification-level alternative with untested claims.

The RTX 4090 Mobile also sits in a tight competitive cluster. Its nearest rivals in the database include the NVIDIA Quadro M6000 at 43,301 (0.8% behind), the NVIDIA GeForce RTX 5050 Mobile at 43,268 (0.9% behind), and the NVIDIA Quadro M6000 24 GB at 43,262 (0.9% behind). The only rival ahead is the NVIDIA RTX A6000 at 44,075, which leads by 0.9%. This means the RTX 4090 Mobile is not a performance outlier; it is squarely within a group of similarly scoring cards, all within roughly 1% of each other. The Arc B770, with no benchmark entries, cannot be placed in that ranking at all.

For a desktop builder, the Arc B770 offers a 225 W TDP, dual-slot cooling, and dual power connectors, which are desktop-class requirements. For a laptop buyer, the RTX 4090 Mobile uses 120 W and is an integrated form factor (IGP), with no power connectors. The verdict is straightforward: the RTX 4090 Mobile is the only one with measured performance and a place in the percentile distribution. The Arc B770 is a desktop part that must be evaluated on architecture and memory characteristics alone until benchmarks appear.

Architecture Differences

The two GPUs come from different architectural lineages. The Intel Arc B770 uses the BMG-G31 chip based on Xe2-HPG, part of the Battlemage (Arc 7) generation, and its predecessor is Alchemist. The NVIDIA GeForce RTX 4090 Mobile uses the AD103 chip based on Ada Lovelace, part of the GeForce 40 Mobile series, with the GeForce 30 Mobile as predecessor and GeForce 50 Mobile as successor. Both are fabricated on a 5 nm process at TSMC, but the die sizes differ slightly: the Intel chip measures 368 mm², the NVIDIA chip measures 379 mm². The RTX 4090 Mobile has a recorded transistor count of 45,900 million and a density of 121.1M per mm², while the Arc B770 lists its transistor count as unknown.

The compute resources diverge sharply. The RTX 4090 Mobile packs 9,728 shading units, 304 TMUs, 112 ROPs, 76 RT cores, and 304 tensor cores. The Arc B770 has 4,096 shading units, 256 TMUs, 128 ROPs, and 32 RT cores, with no tensor core count listed. That is a massive difference in shading units, more than double for the NVIDIA part. The RTX 4090 Mobile also has more than double the RT cores. The Arc B770 compensates in pixel throughput: its pixel rate is 307.2 GPixel/s versus 189.8 GPixel/s for the RTX 4090 Mobile, and its texture rate is 614.4 GTexel/s versus 515.3 GTexel/s. So the Intel part is built for fill-rate-heavy work, while the NVIDIA part is built for shader-heavy workloads.

The FP32 and FP16 numbers tell a similar story. The RTX 4090 Mobile delivers 32.98 TFLOPS FP32 and the same 32.98 TFLOPS FP16 at a 1:1 ratio. The Arc B770 delivers 19.66 TFLOPS FP32 and 39.32 TFLOPS FP16 at a 2:1 ratio. This shows the Intel part doubles its FP16 throughput when the hardware allows, while the NVIDIA part treats both equally. The RTX 4090 Mobile is significantly ahead in FP32, but the Arc B770 is ahead in FP16.

Architecture also affects feature sets. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RTX 4090 Mobile has tensor cores, which the Arc B770 does not list. The Intel part has dedicated RT cores, but far fewer than NVIDIA. The RTX 4090 Mobile's display outputs are listed as "Portable Device Dependent," confirming its laptop-only nature, while the Arc B770 has 1x HDMI 2.1a and 3x DisplayPort 2.1, confirming its desktop orientation.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries between these two GPUs. The only benchmark data available belongs to the RTX 4090 Mobile. Its recorded results include a Geekbench OpenCL score of 180,831 and a Geekbench Vulkan score of 170,774. In PassMark tests, it scores 310 in DirectX 9, 262 in DirectX 11, 173 in DirectX 10, and 107 in DirectX 12. Its PassMark G3D score is 27,212, its G2D score is 984, and its GPU compute score is 12,347. The average benchmark score across all recorded tests is 43,667.

The Arc B770 has no recorded benchmark scores in any test. Its average benchmark score is listed as 0, and its benchmark array is empty. This makes a direct numerical comparison impossible. The RTX 4090 Mobile is the only one with data, and that data places it at the 84th percentile of all GPUs. Its nearest rival comparison shows a tight grouping: the Quadro M6000 trails by 0.8%, the RTX 5050 Mobile trails by 0.9%, the Quadro M6000 24 GB trails by 0.9%, and the RTX A6000 leads by 0.9%.

The practical outcome is that the RTX 4090 Mobile can be described as a mid-to-high percentile performer with strong OpenCL and Vulkan results, while the Arc B770 has no recorded evidence of performance. Any claims about the Arc B770's speed would have to come from its architectural specifications, not from measurement. The database cannot confirm a single win for the Arc B770 in any benchmark.

Specification Differences

The two GPUs differ in nearly every measurable specification. The Arc B770 has a base clock of 2100 MHz and a boost clock of 2400 MHz, while the RTX 4090 Mobile has a base clock of 1335 MHz and a boost clock of 1695 MHz. The Intel part runs substantially higher clocks. Memory speed also differs: the Arc B770 runs at 2000 MHz with 16 Gbps effective, the RTX 4090 Mobile runs at 2250 MHz with 18 Gbps effective. Both have 16 GB of GDDR6 memory on a 256-bit bus, but the RTX 4090 Mobile achieves 576.0 GB/s bandwidth versus 512.0 GB/s for the Arc B770.

Power and physical design are opposite. The Arc B770 draws 225 W, uses a dual-slot cooler, and requires 1x 6-pin plus 1x 8-pin power connectors, with a suggested PSU of 550 W. The RTX 4090 Mobile draws 120 W, is an integrated form factor (IGP), and requires no power connectors. The Arc B770 is a desktop board with standard display outputs; the RTX 4090 Mobile is portable-device dependent. The production status also differs: the RTX 4090 Mobile is marked Active, while the Arc B770 has no production status listed.

Release timing is another difference. The RTX 4090 Mobile was released in January 2023. The Arc B770 has a release date of December 2025. Neither has a launch MSRP in the database, so no price comparison is possible. The RTX 4090 Mobile also has a listed transistor density of 121.1M per mm², while the Arc B770 has no density figure. The die size difference is small, 368 mm² versus 379 mm², but the transistor count difference is large, with the NVIDIA part at 45,900 million and the Intel part unknown.

FAQ

Q: Which GPU has more shading units?

A: The NVIDIA GeForce RTX 4090 Mobile has 9,728 shading units, while the Intel Arc B770 has 4,096. The NVIDIA part has more than double the shading units.

Q: Is the Intel Arc B770 faster in memory bandwidth?

A: No. The RTX 4090 Mobile has 576.0 GB/s bandwidth, while the Arc B770 has 512.0 GB/s. Both use 16 GB of GDDR6 on a 256-bit bus, but the NVIDIA part runs its memory at 2250 MHz with 18 Gbps effective versus 2000 MHz with 16 Gbps effective.

Q: What is the power draw of each GPU?

A: The Intel Arc B770 has a TDP of 225 W and requires a 550 W suggested PSU with 1x 6-pin and 1x 8-pin connectors. The NVIDIA GeForce RTX 4090 Mobile has a TDP of 120 W and requires no power connectors.

Q: Does the Intel Arc B770 have any recorded benchmarks?

A: No. The database lists no benchmark scores for the Arc B770, and its average benchmark score is 0. The RTX 4090 Mobile has multiple recorded scores, including a Geekbench OpenCL score of 180,831 and a PassMark G3D score of 27,212.

Q: Which GPU has more RT cores?

A: The NVIDIA GeForce RTX 4090 Mobile has 76 RT cores, while the Intel Arc B770 has 32 RT cores. The NVIDIA part also has 304 tensor cores, while the Arc B770 lists none.

Q: How does the RTX 4090 Mobile compare to its nearest rivals?

A: It sits within 1% of several rivals. The NVIDIA Quadro M6000 is 0.8% behind, the NVIDIA GeForce RTX 5050 Mobile is 0.9% behind, the NVIDIA Quadro M6000 24 GB is 0.9% behind, and the NVIDIA RTX A6000 is 0.9% ahead.

Where Each One Wins

The RTX 4090 Mobile wins in every category backed by measured data. Its average benchmark score of 43,667 places it at the 84th percentile, and its nearest rival comparisons show it is competitive with a cluster of high-end cards. Its FP32 throughput of 32.98 TFLOPS is well ahead of the Arc B770's 19.66 TFLOPS. Its memory bandwidth of 576.0 GB/s exceeds the Arc B770's 512.0 GB/s. Its 76 RT cores and 304 tensor cores give it a clear advantage in ray tracing and AI-accelerated workloads, assuming the software uses those features. Its 120 W TDP and integrated form factor make it suitable for laptops, and its Active production status means it is currently available.

The Arc B770 wins on clock speed and fill rate. Its boost clock of 2400 MHz is far higher than the RTX 4090 Mobile's 1695 MHz. Its pixel rate of 307.2 GPixel/s beats the NVIDIA part's 189.8 GPixel/s, and its texture rate of 614.4 GTexel/s beats the NVIDIA part's 515.3 GTexel/s. Its FP16 throughput of 39.32 TFLOPS is also higher than the RTX 4090 Mobile's 32.98 TFLOPS, which could matter for workloads that use reduced precision. It also has a larger set of desktop display outputs, including 1x HDMI 2.1a and 3x DisplayPort 2.1, while the RTX 4090 Mobile's outputs depend on the portable device.

For a desktop user prioritizing raw fill rate, high clocks, and FP16 compute, the Arc B770 is the specification-level choice. For a laptop user, or anyone needing verified performance data, the RTX 4090 Mobile is the only option with evidence in the database. The Arc B770's lack of recorded benchmarks and its 50th percentile placement mean it cannot be recommended on measured performance. The RTX 4090 Mobile, with its 84th percentile placement and tight rivalry with other high-end cards, is the safer pick based on data alone. The two GPUs target different physical platforms, and the benchmark data strongly favors the NVIDIA part wherever measurements exist.