AMD Radeon RX 6600 LE vs NVIDIA GB10 Comparison

FAQ

Q: How does the NVIDIA GB10 compare to the AMD Radeon RX 6600 LE in overall benchmark performance?

A: The recorded data shows a decisive advantage for the NVIDIA GB10. Its average benchmark score is 117,393, placing it in the 95th percentile of all GPUs, while the AMD Radeon RX 6600 LE averages 70,829, sitting in the 91st percentile. The GB10 wins both head-to-head tests.

Q: What is the performance gap between the two in the OpenCL test?

A: The NVIDIA GB10 scores 120,137 in Geekbench OpenCL, while the AMD Radeon RX 6600 LE scores 69,229. This represents a 73.5% lead for the GB10, which is the larger of the two deltas recorded in the head-to-head comparison.

Q: Which GPU has a higher boost clock speed?

A: The AMD Radeon RX 6600 LE has a higher boost clock at 2495 MHz, compared to the NVIDIA GB10's boost clock of 2418 MHz. However, the GB10 has a higher base clock at 1665 MHz versus the AMD part's 1626 MHz.

Q: What memory capacities do these two cards offer?

A: The NVIDIA GB10 features 128 GB of LPDDR5X memory on a 256-bit bus, while the AMD Radeon RX 6600 LE comes with 8 GB of GDDR6 memory on a 128-bit bus. The GB10 also delivers higher memory bandwidth at 273.2 GB/s versus 224.0 GB/s for the AMD card.

Q: How do the two compare in terms of shading units and texture mapping units?

A: The NVIDIA GB10 has 6144 shading units and 384 TMUs, whereas the AMD Radeon RX 6600 LE has 1792 shading units and 112 TMUs. The GB10's texture rate is 928.5 GTexel/s, which is substantially higher than the RX 6600 LE's 279.4 GTexel/s.

Q: Which GPU holds the pixel rate advantage?

A: The AMD Radeon RX 6600 LE has a higher pixel rate at 159.7 GPixel/s, compared to the NVIDIA GB10's 116.1 GPixel/s. This is one of the few specification areas where the AMD part leads.

Architecture Differences

The NVIDIA GB10 and AMD Radeon RX 6600 LE represent fundamentally different architectural approaches. The GB10 is built on NVIDIA's Blackwell 2.0 architecture, using the GB20B chip, and belongs to the Server Blackwell (Bxx) generation. It is fabricated on a 5 nm process at TSMC, with a die size of 382 mm². The AMD part uses the RDNA 2.0 architecture with the Navi 23 chip, belongs to the Navi II (RX 6000) generation, and is built on a 7 nm process, also at TSMC, with a smaller die size of 237 mm². The AMD chip has a stated transistor count of 11,060 million and a transistor density of 46.7M per mm², while the GB10's transistor count is listed as unknown.

Memory architecture differs sharply. The GB10 uses 128 GB of LPDDR5X across a 256-bit bus, yielding 273.2 GB/s of bandwidth. The RX 6600 LE uses 8 GB of GDDR6 on a 128-bit bus, producing 224.0 GB/s. The memory clock rates also diverge: the GB10 runs at 1067 MHz (8.5 Gbps effective), while the AMD card operates at 1750 MHz (14 Gbps effective). The higher effective data rate on the AMD part does not compensate for the narrower bus.

The compute resource allocation is heavily skewed toward the NVIDIA part. The GB10 carries 6144 shading units, 384 TMUs, 48 ROPs, 48 RT cores, and 384 tensor cores. The RX 6600 LE has 1792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores, with no tensor core count listed. This results in a large FP32 throughput gap: the GB10 delivers 29.71 TFLOPS, while the RX 6600 LE delivers 8.942 TFLOPS. In FP16, the GB10 again offers 29.71 TFLOPS (1:1 ratio), whereas the AMD part reaches 17.88 TFLOPS (2:1 ratio).

API support is another point of divergence. The GB10 lists DirectX, OpenGL, and Vulkan as N/A, reflecting its server-oriented positioning. The RX 6600 LE supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The GB10 uses a PCIe 5.0 x16 interface, while the RX 6600 LE uses PCIe 4.0 x8. The GB10 is an integrated graphics package (IGP) with no power connectors and a single HDMI output, whereas the RX 6600 LE is a dual-slot card with one 8-pin connector and outputs of 1x HDMI 2.1 and 3x DisplayPort 1.4a. Both share a suggested PSU rating of 300 W, though the GB10 has a TDP of 140 W and the RX 6600 LE is rated at 132 W.

Head-to-Head Benchmarks

The head-to-head comparison includes two Geekbench tests, both won decisively by the NVIDIA GB10. In Geekbench OpenCL, the GB10 scores 120,137 against 69,229 for the RX 6600 LE, a delta of 73.5%. This is a substantial margin that reflects the GB10's far larger shading unit count and memory bandwidth. The RX 6600 LE's 1792 shading units and 224.0 GB/s bandwidth cannot match the GB10's 6144 shading units and 273.2 GB/s bandwidth in a compute-heavy workload.

In Geekbench Vulkan, the gap narrows but remains large. The GB10 scores 114,648, while the RX 6600 LE scores 72,428, resulting in a 58.3% delta. The Vulkan result is interesting because the RX 6600 LE has explicit Vulkan 1.4 API support, while the GB10 lists Vulkan as N/A. Despite that apparent software advantage for the AMD card, the raw hardware throughput of the GB10 still dominates. The lower delta in Vulkan compared to OpenCL suggests that the RX 6600 LE's API maturity helps it close some of the gap, but not enough to threaten the GB10's position.

Context from the nearest rivals reinforces these margins. The GB10's average score of 117,393 places it 0.3% above the NVIDIA RTX 4000 SFF Ada Generation (117,088), 1.3% below the AMD Radeon PRO W7700 (118,976), and 2.6% and 3.0% above the Tesla V100 SXM2 16 GB and RTX A5500 Mobile, respectively. The RX 6600 LE's average of 70,829 sits 1.0% above the RTX A3000 Mobile (70,140), 1.2% above the Quadro P6000 (69,986), 1.3% below the Radeon RX 6650M (71,768), and 1.4% above the Radeon Pro WX 8200 (69,870). These rival comparisons show that the GB10 competes in a much higher performance tier, while the RX 6600 LE sits in a mid-range bracket.

The recorded wins tally is straightforward: 2 wins for the GB10 and 0 for the RX 6600 LE. There is no benchmark in the database where the AMD card outperforms the NVIDIA part. The closest contest is the Vulkan test, where the GB10's lead is 58.3%, still a commanding victory.

Specification Differences

The two cards differ across nearly every specification category. Process node: 5 nm for the GB10 versus 7 nm for the RX 6600 LE. Die size: 382 mm² versus 237 mm². Transistor count: unknown for the GB10 versus 11,060 million for the AMD part. Transistor density: not listed for the GB10 versus 46.7M per mm² for the RX 6600 LE.

Clocks differ as noted: base 1665 MHz versus 1626 MHz, boost 2418 MHz versus 2495 MHz, and the GB10 has no game clock while the RX 6600 LE lists a game clock of 2045 MHz. Memory clock is 1067 MHz (8.5 Gbps effective) for the GB10 versus 1750 MHz (14 Gbps effective) for the AMD card.

Memory capacity and type are major differentiators: 128 GB LPDDR5X versus 8 GB GDDR6. Bus width is 256 bit versus 128 bit. Bandwidth is 273.2 GB/s versus 224.0 GB/s. Shading units: 6144 versus 1792. TMUs: 384 versus 112. ROPs: 48 versus 64. RT cores: 48 versus 28. Tensor cores: 384 for the GB10, none listed for the RX 6600 LE.

Pixel rate favors the AMD card at 159.7 GPixel/s versus 116.1 GPixel/s. Texture rate heavily favors the GB10 at 928.5 GTexel/s versus 279.4 GTexel/s. FP32 is 29.71 TFLOPS versus 8.942 TFLOPS. FP16 is 29.71 TFLOPS (1:1) versus 17.88 TFLOPS (2:1). TDP is 140 W versus 132 W. Slot width is IGP versus dual-slot. Power connectors: none versus 1x 8-pin. Bus interface: PCIe 5.0 x16 versus PCIe 4.0 x8. Display outputs: 1x HDMI versus 1x HDMI 2.1 and 3x DisplayPort 1.4a. API support: N/A for all three on the GB10 versus DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 on the AMD card.

Dimensions also differ. The GB10 measures 150 mm in length, 51 mm in height, and 150 mm in width. The RX 6600 LE is 190 mm long, 110 mm tall, and 40 mm wide. Release dates are 2025-10-14 for the GB10 and 2023-12-07 for the RX 6600 LE. The GB10 has a launch MSRP of 3,999 USD; the RX 6600 LE has no launch MSRP listed. The GB10's predecessor is Server Hopper and its successor is Server Rubin. The RX 6600 LE's predecessor is Navi and its successor is Navi III.

Where Each One Wins

The NVIDIA GB10 wins in every recorded benchmark and in the overwhelming majority of specification comparisons. Its strongest advantages are in raw compute throughput, memory capacity, and memory bandwidth. The FP32 figure of 29.71 TFLOPS is more than three times the RX 6600 LE's 8.942 TFLOPS. The 128 GB memory pool is sixteen times larger than the AMD card's 8 GB, and the 273.2 GB/s bandwidth is 22% higher. These characteristics position the GB10 for workloads that demand massive data movement and heavy parallel computation: large-scale AI inference, scientific simulation, and server-side rendering tasks where the 6144 shading units and 384 tensor cores can be fully utilized.

The GB10 also benefits from a newer process node (5 nm versus 7 nm) and a wider PCIe 5.0 x16 interface, which matters for data transfer in compute environments. Its IGP form factor with no power connectors suggests deployment in integrated server platforms where the 140 W TDP is acceptable and discrete power cabling is undesirable. The 95th percentile ranking among all GPUs, alongside rival deltas that show it within 1.3% of the AMD Radeon PRO W7700 and ahead of the Tesla V100 SXM2, confirms that the GB10 competes at the high end of the database's recorded performance spectrum.

The AMD Radeon RX 6600 LE wins in a smaller set of specifications, but these are not trivial. Its pixel rate of 159.7 GPixel/s exceeds the GB10's 116.1 GPixel/s, indicating stronger fill-rate performance for rasterization-heavy tasks. The boost clock of 2495 MHz is higher than the GB10's 2418 MHz, and the game clock of 2045 MHz provides a defined gaming profile that the GB10 lacks. The RX 6600 LE also has more ROPs (64 versus 48) and a smaller die (237 mm² versus 382 mm²) with a lower TDP (132 W versus 140 W), which suggests better efficiency in certain pixel-bound scenarios.

For gaming and consumer graphics workloads, the RX 6600 LE has clear advantages in API support. DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 are all explicitly listed, whereas the GB10 lists N/A for these APIs. The dual-slot form factor with 1x 8-pin power and multiple display outputs (1x HDMI 2.1, 3x DisplayPort 1.4a) makes it suitable for traditional desktop use with multi-monitor setups. The 91st percentile ranking places it among capable mid-range parts, with rivals like the RTX A3000 Mobile and Quadro P6000 within 1.2% of its average score.

The use-case split is clear. The GB10 is for compute-heavy, server-side applications where massive memory capacity, tensor core availability, and FP32 throughput are paramount. The RX 6600 LE is for consumer graphics, gaming, and rasterization-oriented tasks where pixel throughput, API compatibility, and a conventional card form factor matter more. The benchmark data shows no overlap: the GB10 wins both compute tests, and the RX 6600 LE wins none. But the AMD card's specification advantages in pixel rate and API support indicate that in scenarios not covered by the recorded Geekbench tests, such as traditional game rendering, it would hold its own in ways the raw average score does not fully capture.