AMD Radeon RX 6600 LE vs AMD Radeon RX 7650 GRE Comparison

Where Each One Wins

The recorded head-to-head data contains a single shared benchmark, Geekbench OpenCL, and the AMD Radeon RX 7650 GRE takes it decisively. The RX 7650 GRE scores 83,109 against 69,229 for the RX 6600 LE, a delta of 16.7 percent. That is the only direct comparison available in the database, so the win tally stands at zero for the RX 6600 LE and one for the RX 7650 GRE.

Looking at the broader benchmark profiles, the RX 6600 LE has a Geekbench Vulkan score of 72,428, which is higher than its own OpenCL result of 69,229, indicating that the RDNA 2.0 architecture handles Vulkan workloads particularly well. The RX 7650 GRE has no recorded Vulkan score in the database, so that comparison cannot be made from the available measurements.

The RX 6600 LE sits at the 91st percentile among all GPUs, while the RX 7650 GRE sits at the 83rd percentile. This is a notable inversion: the older card ranks higher in the overall distribution despite losing the direct OpenCL matchup. The RX 6600 LE's average benchmark score of 70,829 reflects two strong compute results, while the RX 7650 GRE's average of 42,723 is dragged down by its inclusion of a 3DMark Steel Nomad DX12 score of 2,336, a test that produces numerically smaller scores than Geekbench's compute workloads.

The RX 7650 GRE's nearest rivals in the database include the NVIDIA GeForce RTX 4070 SUPER, which is 1.2 percent ahead, and the NVIDIA Quadro M6000 24 GB, also 1.2 percent ahead. The RX 6600 LE's nearest rivals include the NVIDIA RTX A3000 Mobile at 1 percent ahead and the AMD Radeon RX 6650M at 1.3 percent behind. These rival comparisons suggest that the RX 7650 GRE competes in a higher performance tier, even though its percentile rank is lower due to the mix of benchmark types recorded for it.

Architecture Differences

The two cards come from different generations of AMD's Radeon lineup. The RX 6600 LE uses the Navi 23 chip built on RDNA 2.0 architecture, part of the Navi II generation from the RX 6000 series. The RX 7650 GRE uses the Navi 33 chip built on RDNA 3.0 architecture, part of the Navi III generation from the RX 7000 series. The RX 7650 GRE carries the codename "Hotpink Bonefish," while the RX 6600 LE has no codename listed.

Manufacturing processes differ. The RX 6600 LE is fabricated on a 7 nm process at TSMC, with 11,060 million transistors on a 237 mm² die, giving a transistor density of 46.7 million per square millimeter. The RX 7650 GRE moves to a 6 nm process at the same foundry, with 13,300 million transistors on a smaller 204 mm² die, yielding a higher density of 65.2 million per square millimeter. The newer process packs more transistors into less silicon.

Shader and texture resources scale up with the newer architecture. The RX 7650 GRE has 2,048 shading units, 128 texture mapping units, and 64 render output units. The RX 6600 LE has 1,792 shading units, 112 TMUs, and the same 64 ROPs. Ray tracing cores increase from 28 on the RX 6600 LE to 32 on the RX 7650 GRE. Neither card has tensor cores listed.

Clock speeds are higher across the board on the RX 7650 GRE. Its base clock is 1720 MHz, boost clock is 2695 MHz, and game clock is 2350 MHz. The RX 6600 LE runs at 1626 MHz base, 2495 MHz boost, and 2045 MHz game clock. Memory clocks also differ: the RX 7650 GRE runs at 2250 MHz with 18 Gbps effective data rate, while the RX 6600 LE runs at 1750 MHz with 14 Gbps effective.

The RX 7650 GRE delivers substantially higher compute throughput. Its FP32 rating is 22.08 TFLOPS, compared to 8.942 TFLOPS for the RX 6600 LE. FP16 performance also diverges: the RX 7650 GRE achieves 22.08 TFLOPS at a 1:1 ratio, while the RX 6600 LE reaches 17.88 TFLOPS at a 2:1 ratio. Pixel rate rises from 159.7 GPixel/s to 172.5 GPixel/s, and texture rate rises from 279.4 GTexel/s to 345.0 GTexel/s.

Memory configuration is identical in capacity and bus width: both cards use 8 GB of GDDR6 on a 128-bit interface. However, the faster memory clock on the RX 7650 GRE produces 288.0 GB/s of bandwidth versus 224.0 GB/s on the RX 6600 LE, a 28.6 percent advantage.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Display outputs differ: the RX 6600 LE provides 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the RX 7650 GRE provides 1x HDMI 2.1a and 3x DisplayPort 2.1. Both use a PCIe 4.0 x8 bus interface and a single 8-pin power connector. The RX 7650 GRE has a higher TDP of 170 W compared to 132 W for the RX 6600 LE, and its suggested power supply is 450 W versus 300 W.

Physical dimensions are close. The RX 6600 LE measures 190 mm in length, 110 mm in height, and 40 mm in width. The RX 7650 GRE is slightly larger at 204 mm in length and 115 mm in height, with no width listed. Both are dual-slot cards.

The Verdict

The data points to the AMD Radeon RX 7650 GRE as the stronger compute performer. Its Geekbench OpenCL score of 83,109 beats the RX 6600 LE's 69,229 by 16.7 percent, and its architecture provides more shading units, higher clocks, more memory bandwidth, and more than double the FP32 throughput. The 22.08 TFLOPS figure versus 8.942 TFLOPS is a stark gap that shows up in raw compute workloads.

The RX 6600 LE is not without its own case. Its 91st percentile rank among all GPUs beats the RX 7650 GRE's 83rd percentile, and its average benchmark score of 70,829 is well above the RX 7650 GRE's 42,723, though that average is computed from different test sets. The RX 6600 LE also draws less power, with a 132 W TDP versus 170 W, and requires a smaller 300 W power supply. Its smaller 190 mm length makes it easier to fit in compact cases.

The RX 7650 GRE is newer, released in February 2025 versus December 2023 for the RX 6600 LE. It uses the more advanced RDNA 3.0 architecture on a 6 nm process, and it carries a launch MSRP of 279 USD. The RX 6600 LE has no launch MSRP recorded.

For users prioritizing raw compute performance and newer display outputs with DisplayPort 2.1, the RX 7650 GRE is the clear choice from the recorded data. For users prioritizing lower power draw, a smaller physical footprint, and a higher overall percentile ranking, the RX 6600 LE remains competitive. The head-to-head benchmark record is thin, but the single direct comparison favors the RX 7650 GRE by a wide margin.

FAQ

Q: Which card has the higher Geekbench OpenCL score?

A: The AMD Radeon RX 7650 GRE scores 83,109, while the AMD Radeon RX 6600 LE scores 69,229, giving the RX 7650 GRE a 16.7 percent advantage.

Q: How do the two cards compare in memory bandwidth?

A: The RX 7650 GRE provides 288.0 GB/s of bandwidth, while the RX 6600 LE provides 224.0 GB/s. Both use 8 GB of GDDR6 on a 128-bit bus.

Q: What are the transistor counts for each GPU?

A: The RX 6600 LE has 11,060 million transistors on a 237 mm² die, and the RX 7650 GRE has 13,300 million transistors on a 204 mm² die.

Q: Which card has a higher FP32 compute rating?

A: The RX 7650 GRE is rated at 22.08 TFLOPS, compared to 8.942 TFLOPS for the RX 6600 LE.

Q: Do both cards support the same DirectX version?

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

Q: What is the TDP difference between the two cards?

A: The RX 6600 LE has a TDP of 132 W with a suggested power supply of 300 W, while the RX 7650 GRE has a TDP of 170 W with a suggested power supply of 450 W.

Head-to-Head Benchmarks

The only direct benchmark shared between the two cards in the database is Geekbench OpenCL. The RX 7650 GRE delivers 83,109 points, and the RX 6600 LE delivers 69,229 points. The RX 7650 GRE wins by 13,880 points, which works out to a 16.7 percent delta. This is a substantial margin, indicating that the newer architecture's higher shader count and clock speeds translate directly into compute performance.

The RX 7650 GRE's nearest rivals in the database help contextualize this score. The NVIDIA GeForce RTX 4070 SUPER is 1.2 percent ahead at 43,223 average score, and the NVIDIA Quadro M6000 24 GB is 1.2 percent ahead at 43,262. The RX 7650 GRE's average score of 42,723 places it just behind these cards. The RX 6600 LE's nearest rivals include the NVIDIA RTX A3000 Mobile at 70,140, which is 1 percent ahead, and the AMD Radeon RX 6650M at 71,768, which is 1.3 percent ahead of the RX 6600 LE.

The RX 6600 LE has an additional benchmark not shared with the RX 7650 GRE: Geekbench Vulkan, where it scores 72,428. This is 3,199 points higher than its OpenCL result, suggesting that Vulkan workloads benefit from the RDNA 2.0 architecture's scheduling. The RX 7650 GRE has a 3DMark Steel Nomad DX12 score of 2,336, which is a different test scale and cannot be directly compared to the RX 6600 LE's scores.

The percentile ranking difference is worth examining. The RX 6600 LE sits at the 91st percentile among all GPUs, while the RX 7650 GRE sits at the 83rd percentile. This means the RX 6600 LE outperforms a larger fraction of the GPU population in the database, even though it loses the direct OpenCL matchup. The RX 7650 GRE's lower percentile is partially explained by its average score being pulled down by the Steel Nomad result, which produces numerically smaller scores than Geekbench's compute tests.

The RX 7650 GRE's FP32 throughput of 22.08 TFLOPS is 2.47 times the RX 6600 LE's 8.942 TFLOPS. Texture rate follows a similar pattern: 345.0 GTexel/s versus 279.4 GTexel/s, a 23.5 percent increase. Pixel rate is closer, at 172.5 GPixel/s versus 159.7 GPixel/s, an 8 percent increase. These figures align with the OpenCL benchmark result, where the RX 7650 GRE leads by roughly the same magnitude as its shader and texture advantages.

Memory bandwidth also favors the RX 7650 GRE, at 288.0 GB/s versus 224.0 GB/s. The 64 GB/s difference is meaningful for bandwidth-sensitive workloads, and it compounds with the higher clock speeds to explain the OpenCL performance gap.

Specification Differences

The two cards differ in nearly every architectural specification while sharing the same memory capacity and bus width.

| Specification | AMD Radeon RX 6600 LE | AMD Radeon RX 7650 GRE |

|---|---|---|

| Architecture | RDNA 2.0 | RDNA 3.0 |

| Process node | 7 nm | 6 nm |

| Transistors | 11,060 million | 13,300 million |

| Die size | 237 mm² | 204 mm² |

| Transistor density | 46.7M / mm² | 65.2M / mm² |

| Base clock | 1626 MHz | 1720 MHz |

| Boost clock | 2495 MHz | 2695 MHz |

| Game clock | 2045 MHz | 2350 MHz |

| Memory clock | 1750 MHz, 14 Gbps effective | 2250 MHz, 18 Gbps effective |

| Memory bandwidth | 224.0 GB/s | 288.0 GB/s |

| Shading units | 1792 | 2048 |

| TMUs | 112 | 128 |

| ROPs | 64 | 64 |

| RT cores | 28 | 32 |

| FP32 | 8.942 TFLOPS | 22.08 TFLOPS |

| FP16 | 17.88 TFLOPS (2:1) | 22.08 TFLOPS (1:1) |

| Pixel rate | 159.7 GPixel/s | 172.5 GPixel/s |

| Texture rate | 279.4 GTexel/s | 345.0 GTexel/s |

| TDP | 132 W | 170 W |

| Suggested PSU | 300 W | 450 W |

| Display outputs | 1x HDMI 2.1, 3x DisplayPort 1.4a | 1x HDMI 2.1a, 3x DisplayPort 2.1 |

| Length | 190 mm | 204 mm |

| Height | 110 mm | 115 mm |

| Width | 40 mm | Not listed |

| Release date | December 2023 | February 2025 |

Both cards use 8 GB GDDR6 memory on a 128-bit bus, a dual-slot cooler, a single 8-pin power connector, and a PCIe 4.0 x8 interface. Both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The RX 7650 GRE is the only one with a recorded launch MSRP of 279 USD.