Intel Arc B770 vs Intel Arc G3 Comparison

The Verdict

The Intel Arc B770 and Intel Arc G3 occupy completely different segments of the graphics landscape. The B770 is a discrete desktop GPU from the Battlemage (Arc 7) generation, built on TSMC's 5 nm process. The G3 is an integrated graphics processor from the Panther Lake generation, built on Intel's 3 nm process. The data confirms that the B770 is the clear performance leader, with 4096 shading units compared to the G3's 1280, and 32 ray tracing cores versus the G3's 10. The B770 delivers 19.66 TFLOPS of FP32 compute, more than three times the G3's 6.144 TFLOPS. The G3 draws only 25 W of power, while the B770 has a 225 W TDP. Neither part has recorded benchmark scores in the database, but the architectural specifications alone indicate a wide performance gap. The B770 is the choice for desktop users requiring maximum graphics throughput, while the G3 serves portable devices where power consumption is the primary constraint.

Where Each One Wins

Intel Arc B770 wins in raw compute throughput. The recorded data shows 19.66 TFLOPS of FP32 performance, which is 3.2 times the G3's 6.144 TFLOPS. The B770's FP16 output of 39.32 TFLOPS (2:1) similarly dwarfs the G3's 12.29 TFLOPS (2:1). Texture processing favors the B770 as well: 614.4 GTexel/s versus 96.00 GTexel/s. Pixel fill rates tell the same story, with the B770 producing 307.2 GPixel/s compared to the G3's 48.00 GPixel/s. The B770 provides 16 GB of dedicated GDDR6 memory on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The G3 relies on system shared memory with system dependent bandwidth, which introduces latency and capacity constraints that dedicated VRAM avoids.

Intel Arc G3 wins in efficiency and integration. The G3 consumes 25 W, which is 11% of the B770's 225 W TDP. This power envelope enables a slotless IGP design with no power connectors and no suggested PSU requirement. The G3 uses a 3 nm process from Intel's own foundry, while the B770 uses 5 nm from TSMC. The newer node allows the G3 to operate at a base clock of just 300 MHz while still reaching a 2400 MHz boost, matching the B770's boost clock. The G3's display outputs are portable device dependent, indicating its target platform is mobile hardware. The B770 requires a PCIe 4.0 x16 slot, dual-slot cooling, and a 1x 6-pin plus 1x 8-pin power connection.

Architecture Differences

The B770 uses the Xe2-HPG architecture on the BMG-G31 chip. This is a high-performance graphics architecture from the Battlemage generation, positioned in the Arc 7 tier. The G3 uses Xe3-LPG on the Panther Lake chip, which belongs to the Arc Graphics-M generation. LPG typically indicates a low-power graphics variant optimized for integrated use. The process node difference is significant: the B770 is fabricated on TSMC's 5 nm process, while the G3 uses Intel's 3 nm process. The B770's die size is 368 mm², while the G3's die size is unknown in the database.

The B770 has 4096 shading units, 256 texture mapping units, and 128 ROPs. The G3 has 1280 shading units, 40 TMUs, and 20 ROPs. Ray tracing hardware exists in both: 32 RT cores on the B770 versus 10 on the G3. Neither part lists tensor cores, so tensor performance is not characterized in the database. Memory architecture diverges completely: the B770 uses 16 GB of GDDR6 with a 256-bit bus, while the G3 uses system shared memory with no fixed bus width or bandwidth figure.

Clock behavior differs meaningfully. The B770 has a 2100 MHz base clock and a 2400 MHz boost. The G3 has a 300 MHz base and a 2400 MHz boost. The wide base-to-boost delta on the G3 suggests aggressive power management, allowing the integrated part to idle at very low clocks and ramp up to match the discrete card's boost frequency when thermal and power budgets allow. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API feature parity is complete. The B770 outputs 1x HDMI 2.1a and 3x DisplayPort 2.1, while the G3's outputs are portable device dependent.

The B770 lists the Alchemist as its predecessor, situating it in a product lineage. The G3 has no predecessor listed, positioning it as a new architectural introduction. The G3's production status is active, while the B770's production status is not recorded. The B770's release date is recorded as 2025-12-31, and the G3's release date is 2026-05-31, indicating the integrated part launches later.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The B770 delivers 19.66 TFLOPS of FP32 performance, which is 3.2 times the G3's 6.144 TFLOPS.

Q: What memory configurations do these GPUs use?

A: The B770 has 16 GB of GDDR6 on a 256-bit bus with 512.0 GB/s of bandwidth. The G3 uses system shared memory with system dependent bandwidth and no fixed bus width.

Q: How do power requirements compare?

A: The B770 has a 225 W TDP and requires a 550 W suggested PSU, a dual-slot cooler, and a 1x 6-pin plus 1x 8-pin power connector. The G3 has a 25 W TDP, is an IGP with no power connectors, and has no suggested PSU.

Q: Do both GPUs support the same graphics APIs?

A: Yes, both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: Which process nodes are used?

A: The B770 uses TSMC's 5 nm process. The G3 uses Intel's 3 nm process.

Q: What are the shading unit counts?

A: The B770 has 4096 shading units. The G3 has 1280 shading units.

Head-to-Head Benchmarks

The database contains no recorded benchmark scores for either GPU, and the head-to-head benchmark array is empty. The nearest rivals lists are also empty for both parts. The percentile versus all GPUs is 50 for each, though this is a default value in the absence of measured scores. Analysis must therefore rely on the architectural specifications, which are fully documented.

The most decisive specification gap is FP32 throughput. The B770's 19.66 TFLOPS versus the G3's 6.144 TFLOPS represents a 220% advantage for the B770. This ratio holds across related metrics. FP16 performance shows the B770 at 39.32 TFLOPS versus the G3's 12.29 TFLOPS, a 220% advantage as well, since both use a 2:1 ratio relative to their FP32 rates. Texture fill rate shows a larger gap: the B770 produces 614.4 GTexel/s, which is 6.4 times the G3's 96.00 GTexel/s. Pixel fill rate follows a similar pattern: 307.2 GPixel/s versus 48.00 GPixel/s, a 6.4 times difference. These fill rate gaps stem from the B770's higher TMU count (256 versus 40) and ROP count (128 versus 20).

Memory bandwidth is another area of decisive separation. The B770's dedicated 512.0 GB/s GDDR6 bandwidth is fixed and dedicated to the GPU. The G3's bandwidth is system dependent, meaning it varies based on the host platform's memory configuration and competes with CPU traffic. Dedicated VRAM also removes latency variability associated with shared memory access. The B770's 256-bit memory bus provides the physical pathway for its bandwidth, while the G3 has no defined bus width.

Ray tracing resources show a 3.2 times advantage for the B770, with 32 RT cores versus 10. This suggests the B770 can handle more concurrent ray traversal and intersection work. The B770's 4096 shading units versus the G3's 1280 also indicates a 3.2 times advantage in shader processing. These ratios are consistent, reflecting the B770's positioning as a full-scale discrete GPU versus the G3's integrated role.

Clock speed analysis reveals nuance. Both GPUs reach 2400 MHz boost clocks, so peak single-thread shader frequency is identical. However, the B770's base clock of 2100 MHz is seven times the G3's 300 MHz base. The G3's low base clock is typical of integrated parts that aggressively downclock when idle or lightly loaded. Sustained workloads would likely push the G3 toward its boost clock, but the B770 can sustain higher clocks with less variance due to its dedicated cooling and power delivery. The B770's dual-slot cooler and 225 W power budget allow sustained boost operation, while the G3's 25 W envelope requires rapid clock modulation.

Power consumption is the metric where the G3 wins decisively. Its 25 W TDP is 200 W lower than the B770's 225 W TDP. This difference enables the G3's slotless IGP form factor with no external power connectors. The B770 requires a 550 W suggested PSU, which is a system-level cost not reflected in the GPU's TDP alone. The G3's integration into a Panther Lake processor eliminates the need for a separate graphics card, reducing system complexity.

Die size data is incomplete: the B770 measures 368 mm², while the G3's die size is unknown. Transistor counts are unknown for both parts. The B770's larger die is consistent with its higher component counts. The G3's 3 nm process from Intel may compensate for its smaller component count with higher density, but the database does not record transistor density for either part.

Both GPUs support the same API set, so software compatibility at the API level is identical. DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 are available on both. This parity means that feature-level game support, including ray tracing and mesh shaders, is present on both parts. The B770's larger RT core count and higher compute throughput will deliver better ray tracing performance, but API capabilities do not differentiate the two.

The B770's display outputs are fixed: 1x HDMI 2.1a and 3x DisplayPort 2.1. The G3's outputs are portable device dependent, meaning the manufacturer of the host device determines the available connectors. This reflects the B770's role as a desktop add-in card with standardized outputs, while the G3 adapts to the laptop or handheld form factor it ships in.

The B770's release date is recorded as 2025-12-31, and the G3's release date is 2026-05-31. The G3 launches later and uses a newer process node. The B770's predecessor is Alchemist, establishing a generational lineage. The G3 has no predecessor listed, suggesting it is a first-generation product in its category. The G3's production status is active, while the B770's production status is not recorded.