Intel Arc B770 vs NVIDIA GeForce RTX 4070 Mobile Comparison

Intel Arc B770 and NVIDIA GeForce RTX 4070 Mobile represent two very different approaches to graphics hardware: one is a desktop-oriented discrete GPU built on Intel’s new Xe2 architecture, the other is a laptop-class chip from NVIDIA’s Ada Lovelace lineup. The recorded data shows that while the RTX 4070 Mobile has a substantial benchmark footprint, the B770 lacks any direct benchmark scores in the database, so comparisons must rely on architectural specifications and the RTX 4070 Mobile’s relative position to its rivals.

Head-to-Head Benchmarks

The RTX 4070 Mobile carries all nine recorded benchmark scores in the database, while the Intel Arc B770 has an empty benchmark array. This means the only direct performance numbers available for comparison are those of the NVIDIA part, and they illustrate a broad range of capabilities across different API generations and workloads.

In Geekbench compute tests, the RTX 4070 Mobile scores 109,197 in OpenCL and 108,367 in Vulkan. These two results are very close, with a difference of just 830 points, indicating consistent raw compute performance across these two low-level APIs. The Vulkan score is approximately 0.8% lower than the OpenCL score, a minor variation likely due to driver overhead or workload scheduling differences.

PassMark results show a more complex picture. The DirectX 10 score is 116, DirectX 11 is 179, DirectX 12 is 85, and DirectX 9 is 223. The DirectX 9 result is the highest of the four, exceeding DirectX 11 by 44 points and DirectX 10 by 107 points. DirectX 12 is the weakest of the four API tests, at 85, which is less than half of the DirectX 9 score. This pattern suggests that the RTX 4070 Mobile performs best in legacy DirectX 9 workloads and struggles more in modern DirectX 12 scenarios, at least in this specific benchmark suite.

The PassMark G3D score is 19,587, while the G2D score is 763. The compute-specific PassMark GPU Compute test yields 8,399, which is less than half of the G3D score. The average benchmark score across all recorded tests is 27,435, and the GPU sits at the 73rd percentile among all GPUs in the database.

Because the B770 has no scores, the head-to-head comparison is one-sided. However, the RTX 4070 Mobile’s nearest rivals provide context for its performance tier. The AMD Radeon RX 6700 XT has an average score of 27,425, which is essentially identical to the RTX 4070 Mobile’s 27,435, with a delta of 0%. The NVIDIA GeForce RTX 3090 scores 27,565, putting the 4070 Mobile 0.5% behind it. The NVIDIA RTX PRO 4000 Blackwell scores 27,135, placing the 4070 Mobile 1.1% ahead. The AMD Radeon Pro Vega 20 scores 27,839, meaning the 4070 Mobile trails it by 1.5%. These deltas are all within 1.5 percentage points, indicating that the RTX 4070 Mobile performs in a tightly packed band around these desktop and workstation cards.

Where Each One Wins

The Intel Arc B770, based on its specifications, targets high-throughput compute and memory-intensive workloads. It has 4096 shading units, 256 texture mapping units, and 128 raster operations pipelines, which are all higher than the corresponding units on the RTX 4070 Mobile. The B770 also has 32 ray tracing cores and a pixel rate of 307.2 GPixel/s, a texture rate of 614.4 GTexel/s, and FP32 performance of 19.66 TFLOPS. These figures indicate that the B770 is designed for scenarios where raw parallel math and texture throughput dominate, such as rendering at high resolutions or processing large data sets.

The RTX 4070 Mobile has 4608 shading units, which is 512 more than the B770, but only 144 TMUs and 48 ROPs, substantially fewer than the B770. Its FP32 performance is 15.62 TFLOPS, which is 4.04 TFLOPS lower than the B770’s 19.66 TFLOPS. The RTX 4070 Mobile does have 144 tensor cores and 36 ray tracing cores, giving it dedicated hardware for AI acceleration and ray-traced effects. Its FP16 performance is 15.62 TFLOPS at a 1:1 ratio, whereas the B770’s FP16 is 39.32 TFLOPS at a 2:1 ratio, meaning the B770 can double its throughput on FP16 workloads.

Memory capacity and bandwidth also split the two. The B770 has 16 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The RTX 4070 Mobile has 8 GB of GDDR6 on a 128-bit bus, yielding 256.0 GB/s. The B770 has twice the memory capacity and exactly twice the bandwidth of the RTX 4070 Mobile. For workloads that require large frame buffers or high-bandwidth data movement, such as 4K texture streaming or large compute buffers, the B770 has a clear structural advantage.

The RTX 4070 Mobile wins in portability and power efficiency. Its TDP is 115 W, while the B770 is rated at 225 W. The RTX 4070 Mobile is an integrated graphics package (IGP) with no power connectors, while the B770 is a dual-slot card requiring 1x 6-pin plus 1x 8-pin power connectors and a suggested 550 W power supply. The RTX 4070 Mobile also uses a narrower PCIe 4.0 x8 interface, whereas the B770 uses PCIe 4.0 x16.

Architecture Differences

The two GPUs come from different architectures and generations. The Intel Arc B770 is based on the Xe2-HPG architecture, built on TSMC’s 5 nm process, and belongs to the Battlemage (Arc 7) generation. Its chip is designated BMG-G31 with a die size of 368 mm². The transistor count is not recorded in the database. The B770 has a base clock of 2100 MHz and a boost clock of 2400 MHz, with memory running at 2000 MHz or 16 Gbps effective.

The NVIDIA GeForce RTX 4070 Mobile is based on Ada Lovelace, also on TSMC’s 5 nm process, but uses the AD106 chip with a die size of 188 mm². It contains 22,900 million transistors, giving a transistor density of 121.8 million per mm². The B770’s die is 180 mm² larger, but its transistor count is unknown, so density cannot be compared directly. The RTX 4070 Mobile has a base clock of 1395 MHz and a boost clock of 1695 MHz, both lower than the B770’s clocks. Its memory also runs at 2000 MHz or 16 Gbps effective.

The B770 has a 256-bit memory bus versus the RTX 4070 Mobile’s 128-bit bus, and the B770’s ROP count of 128 is more than double the RTX 4070 Mobile’s 48. The B770 also has 256 TMUs versus 144 on the RTX 4070 Mobile. The RTX 4070 Mobile has more shading units (4608 vs 4096) and more ray tracing cores (36 vs 32), plus 144 tensor cores that the B770 lacks entirely.

Both GPUs support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The B770’s display outputs are 1x HDMI 2.1a and 3x DisplayPort 2.1, while the RTX 4070 Mobile’s outputs are listed as portable device dependent, reflecting its mobile nature. The B770 is a dual-slot card with a 225 W TDP, while the RTX 4070 Mobile is an IGP with a 115 W TDP and no power connectors.

The RTX 4070 Mobile was released on 2023-01-02, while the B770’s release date is recorded as 2025-12-31. The RTX 4070 Mobile’s predecessor is the GeForce 30 Mobile series, and its successor is the GeForce 50 Mobile series. The B770’s predecessor is Alchemist, and it has no recorded successor.

FAQ

Q: Which GPU has higher raw FP32 compute performance?

A: The Intel Arc B770 has an FP32 throughput of 19.66 TFLOPS, while the NVIDIA GeForce RTX 4070 Mobile is rated at 15.62 TFLOPS. The B770 is approximately 26% higher in this metric.

Q: How much memory bandwidth does each GPU provide?

A: The Intel Arc B770 delivers 512.0 GB/s from 16 GB of GDDR6 on a 256-bit bus. The NVIDIA GeForce RTX 4070 Mobile delivers 256.0 GB/s from 8 GB of GDDR6 on a 128-bit bus. The B770 has exactly twice the bandwidth and twice the capacity.

Q: What is the power consumption difference?

A: The Intel Arc B770 has a TDP of 225 W and requires a 550 W suggested power supply with 1x 6-pin and 1x 8-pin connectors. The NVIDIA GeForce RTX 4070 Mobile has a TDP of 115 W and uses no power connectors, as it is an integrated graphics package.

Q: How does the RTX 4070 Mobile compare to its nearest rivals?

A: The RTX 4070 Mobile’s average benchmark score is 27,435. It is exactly level with the AMD Radeon RX 6700 XT (0% delta), 0.5% behind the NVIDIA GeForce RTX 3090, 1.1% ahead of the NVIDIA RTX PRO 4000 Blackwell, and 1.5% behind the AMD Radeon Pro Vega 20.

Q: Which GPU has more shading units?

A: The NVIDIA GeForce RTX 4070 Mobile has 4608 shading units, while the Intel Arc B770 has 4096. The RTX 4070 Mobile has 512 more shading units, but the B770 has higher texture and pixel rates.

Q: What architectures do these GPUs use?

A: The Intel Arc B770 uses the Xe2-HPG architecture on a 5 nm TSMC process, part of the Battlemage generation. The NVIDIA GeForce RTX 4070 Mobile uses the Ada Lovelace architecture on a 5 nm TSMC process, part of the GeForce 40 Mobile generation.

The Verdict

The recorded data shows that the NVIDIA GeForce RTX 4070 Mobile is a well-positioned mobile GPU, sitting at the 73rd percentile and performing within 1.5 percentage points of several desktop-class rivals including the RTX 3090 and RX 6700 XT. Its benchmark scores span a wide range, from 85 in PassMark DirectX 12 to 19,587 in PassMark G3D, with an average of 27,435. For users who need a GPU in a portable form factor, the RTX 4070 Mobile offers a compact IGP package with 115 W TDP, 8 GB of memory, and dedicated tensor cores.

The Intel Arc B770, despite having no recorded benchmark scores, presents a specification profile aimed at a different workload set. Its 16 GB memory, 512.0 GB/s bandwidth, 19.66 TFLOPS FP32, and 39.32 TFLOPS FP16 indicate a GPU built for high-throughput compute and large-memory rendering tasks. The 225 W TDP and dual-slot form factor make it unsuitable for thin-and-light laptops, but its 128 ROPs and 256 TMUs suggest strong fill-rate performance.

Users who prioritize maximum memory capacity, bandwidth, and raw FP32 or FP16 throughput should consider the Intel Arc B770, as its structural advantages in these areas are clear from the data. Users who need a GPU for a laptop, require tensor core acceleration, or want a device that consumes less power should lean toward the NVIDIA GeForce RTX 4070 Mobile. The data does not provide direct head-to-head benchmark comparisons, so any performance ranking between the two must rely on the B770’s specifications and the RTX 4070 Mobile’s measured scores, which place it in a competitive tier with several desktop GPUs.