AMD Radeon RX 6600 LE vs AMD Radeon RX 6950 XT Comparison

Where Each One Wins

The benchmark data splits cleanly between these two Radeon cards, and the victories are not subtle. The RX 6950 XT wins both recorded head-to-head tests outright, but the RX 6600 LE holds a notable position in the overall database rankings, sitting at the 91st percentile against all GPUs while the RX 6950 XT sits at the 88th percentile. That inversion is worth examining closely.

The RX 6600 LE is the efficiency-oriented pick. Its recorded average benchmark score of 70,829 places it just 1.3% behind the AMD Radeon RX 6650M, and it edges out the NVIDIA RTX A3000 Mobile by 1%, the NVIDIA Quadro P6000 by 1.2%, and the AMD Radeon Pro WX 8200 by 1.4%. Those margins are tight, which suggests the RX 6600 LE is a consistent performer in its weight class, trading blows with mobile workstation GPUs and older professional cards. For a desktop card with a 132 W TDP and a single 8-pin connector, that level of company is respectable.

The RX 6950 XT, by contrast, is the raw throughput champion. Its OpenCL score of 205,998 is nearly triple that of the RX 6600 LE, and its Vulkan score of 165,212 is more than double. The RX 6950 XT's nearest rivals in the database are the NVIDIA P102-100 (0.2% behind), the Intel Arc A570M (0.3% ahead), the AMD Radeon PRO V710 (0.5% behind), and the AMD Radeon RX 5600 OEM (0.5% ahead). These are close margins around its average score of 58,392, but that average is dragged down by the inclusion of older DirectX 9, 10, and 11 tests plus 2D tests, which are not representative of modern gaming workloads. The headline compute scores tell a different story.

For gaming and general compute, the RX 6950 XT wins. For efficiency-constrained builds, the RX 6600 LE is the sensible choice. The data does not show the RX 6600 LE winning any benchmark outright, but its percentile ranking suggests it punches above its modest specifications in the aggregate.

Architecture Differences

Both cards share the RDNA 2.0 architecture from the Navi II (RX 6000) generation, but they are built around very different chips. The RX 6600 LE uses Navi 23, a 7 nm TSMC die with 11,060 million transistors on a 237 mm² footprint, giving a transistor density of 46.7 million per mm². The RX 6950 XT uses Navi 21, also 7 nm TSMC, but with 26,800 million transistors on a 520 mm² die, for a density of 51.5 million per mm². The bigger chip delivers substantially more hardware resources: 5,120 shading units versus 1,792, 320 texture mapping units versus 112, 128 render output units versus 64, and 80 ray tracing cores versus 28.

Memory configurations differ sharply. The RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s of bandwidth, while the RX 6950 XT has 16 GB of GDDR6 on a 256-bit bus with 576.0 GB/s of bandwidth. Memory clock speeds also differ: 1750 MHz (14 Gbps effective) on the smaller card versus 2250 MHz (18 Gbps effective) on the larger one. That bandwidth gap is one of the largest functional differences between the two, and it shows up in compute-heavy workloads.

Clock behavior is interesting because the cards are tuned differently. The RX 6600 LE has a base clock of 1626 MHz, a game clock of 2045 MHz, and a boost clock of 2495 MHz. The RX 6950 XT has a higher base clock at 1860 MHz and a higher game clock at 2100 MHz, but a lower boost clock at 2310 MHz. So the smaller card actually boosts higher, but the larger card sustains a higher floor. The RX 6950 XT compensates with far more execution units, so the higher boost on the RX 6600 LE does not close the throughput gap.

Power delivery and physical requirements differ dramatically. The RX 6600 LE is a dual-slot card with a 132 W TDP, a single 8-pin power connector, and a suggested 300 W PSU. The RX 6950 XT is a triple-slot card with a 335 W TDP, two 8-pin connectors, and a suggested 700 W PSU. Dimensions also diverge: the RX 6600 LE measures 190 mm long, 110 mm tall, and 40 mm wide, while the RX 6950 XT measures 267 mm long, 120 mm tall, and 50 mm wide. The RX 6950 XT is physically a much larger card and will not fit in every chassis.

Both cards support PCIe 4.0, but the RX 6600 LE uses an x8 interface while the RX 6950 XT uses x16. Display outputs are similar: the RX 6600 LE has one HDMI 2.1 and three DisplayPort 1.4a outputs, while the RX 6950 XT has one HDMI 2.1 and two DisplayPort 1.4a outputs. API support is identical, with DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Head-to-Head Benchmarks

The database records two direct comparisons between these cards. In Geekbench OpenCL, the RX 6950 XT scores 205,998 against 69,229 for the RX 6600 LE, a delta of 66.4% in favor of the larger card. That is a decisive margin, roughly three times the compute throughput. In Geekbench Vulkan, the RX 6950 XT scores 165,212 against 72,428, a delta of 56.2%. Again, the RX 6950 XT is more than twice as fast.

These are not close contests. The RX 6950 XT wins both by massive margins, and the delta percentages reflect a generational gap in raw compute resources. The RX 6600 LE has 8.942 TFLOPS of FP32 throughput, while the RX 6950 XT has 23.65 TFLOPS, a 2.6x difference. FP16 follows the same pattern: 17.88 TFLOPS versus 47.31 TFLOPS, both at a 2:1 ratio. Pixel rate and texture rate also favor the RX 6950 XT: 295.7 GPixel/s versus 159.7 GPixel/s, and 739.2 GTexel/s versus 279.4 GTexel/s.

The RX 6600 LE also has additional benchmark data beyond the head-to-head tests. Its Geekbench Vulkan score of 72,428 is actually higher than its OpenCL score of 69,229, which is unusual and suggests the card handles Vulkan workloads slightly better than OpenCL. The RX 6950 XT, by contrast, scores much higher in OpenCL (205,998) than in Vulkan (165,212), indicating its strength lies in general-purpose compute rather than graphics API workloads.

PassMark results for the RX 6950 XT show a G3D score of 28,070, a GPU compute score of 14,199, and 2D score of 1,063. The DirectX 9 and 11 scores are 303 and 300 respectively, while DirectX 10 and 12 scores are 164 and 114. These legacy tests are not part of the head-to-head comparison, but they show the RX 6950 XT's behavior across older APIs. The RX 6600 LE has no equivalent PassMark data in the database.

The wins tally is 2 for the RX 6950 XT and 0 for the RX 6600 LE. There is no benchmark in the recorded data where the RX 6600 LE comes out ahead.

The Verdict

The choice between these two cards depends entirely on the workload and the physical constraints of the build. The RX 6950 XT is the clear performance leader in every recorded benchmark. Its OpenCL score is 66.4% higher and its Vulkan score is 56.2% higher than the RX 6600 LE. If the priority is maximum compute throughput, the RX 6950 XT is the only defensible option from this data.

However, the RX 6600 LE is not without merit. Its 91st percentile ranking against all GPUs is higher than the RX 6950 XT's 88th percentile, which means the database places the smaller card in a better relative position overall. That ranking reflects its average benchmark score of 70,829, which is actually higher than the RX 6950 XT's average of 58,392. The RX 6950 XT's average is pulled down by legacy PassMark tests and 2D tests that do not reflect modern gaming performance. The RX 6600 LE, with only OpenCL and Vulkan scores in its record, looks cleaner in the aggregate.

For a compact build, the RX 6600 LE is the practical choice. It is a dual-slot card at 190 mm long, requires only a single 8-pin connector, and has a 132 W TDP with a suggested 300 W PSU. The RX 6950 XT needs a triple-slot card at 267 mm long, two 8-pin connectors, and a 700 W PSU. The power and space requirements are not comparable.

The RX 6950 XT also carries a launch MSRP of 1,099 USD, while the RX 6600 LE has no recorded launch MSRP in the database. That difference in positioning reinforces the performance gap.

Users who need maximum compute performance, have the PSU headroom, and can fit a large triple-slot card should choose the RX 6950 XT. Users who want a smaller, lower-power card that still ranks in the 91st percentile of all GPUs should choose the RX 6600 LE. The data does not support any other conclusion.

FAQ

Q: Which card is faster in OpenCL?

A: The AMD Radeon RX 6950 XT scores 205,998 in Geekbench OpenCL, which is 66.4% higher than the RX 6600 LE's 69,229.

Q: Which card is faster in Vulkan?

A: The AMD Radeon RX 6950 XT scores 165,212 in Geekbench Vulkan, which is 56.2% higher than the RX 6600 LE's 72,428.

Q: How much memory does each card have?

A: The RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. The RX 6950 XT has 16 GB of GDDR6 on a 256-bit bus with 576.0 GB/s bandwidth.

Q: What are the power requirements?

A: The RX 6600 LE has a 132 W TDP, one 8-pin connector, and a suggested 300 W PSU. The RX 6950 XT has a 335 W TDP, two 8-pin connectors, and a suggested 700 W PSU.

Q: Which card ranks higher in the database?

A: The RX 6600 LE ranks at the 91st percentile against all GPUs, while the RX 6950 XT ranks at the 88th percentile. The RX 6600 LE also has a higher average benchmark score of 70,829 versus 58,392.

Q: Are the cards the same architecture?

A: Yes, both use RDNA 2.0 from the Navi II (RX 6000) generation, but the RX 6600 LE uses the Navi 23 chip while the RX 6950 XT uses the Navi 21 chip.

Specification Differences

| Specification | AMD Radeon RX 6600 LE | AMD Radeon RX 6950 XT |

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

| Chip | Navi 23 | Navi 21 |

| Process node | 7 nm | 7 nm |

| Transistors | 11,060 million | 26,800 million |

| Die size | 237 mm² | 520 mm² |

| Transistor density | 46.7M / mm² | 51.5M / mm² |

| Base clock | 1626 MHz | 1860 MHz |

| Game clock | 2045 MHz | 2100 MHz |

| Boost clock | 2495 MHz | 2310 MHz |

| Memory clock | 1750 MHz (14 Gbps effective) | 2250 MHz (18 Gbps effective) |

| Memory size | 8 GB | 16 GB |

| Memory bus width | 128 bit | 256 bit |

| Memory bandwidth | 224.0 GB/s | 576.0 GB/s |

| Shading units | 1792 | 5120 |

| TMUs | 112 | 320 |

| ROPs | 64 | 128 |

| Ray tracing cores | 28 | 80 |

| Pixel rate | 159.7 GPixel/s | 295.7 GPixel/s |

| Texture rate | 279.4 GTexel/s | 739.2 GTexel/s |

| FP32 | 8.942 TFLOPS | 23.65 TFLOPS |

| FP16 | 17.88 TFLOPS (2:1) | 47.31 TFLOPS (2:1) |

| TDP | 132 W | 335 W |

| Slot width | Dual-slot | Triple-slot |

| Power connectors | 1x 8-pin | 2x 8-pin |

| Suggested PSU | 300 W | 700 W |

| Bus interface | PCIe 4.0 x8 | PCIe 4.0 x16 |

| Display outputs | 1x HDMI 2.1, 3x DisplayPort 1.4a | 1x HDMI 2.1, 2x DisplayPort 1.4a |

| Length | 190 mm (7.5 inches) | 267 mm (10.5 inches) |

| Height | 110 mm (4.3 inches) | 120 mm (4.7 inches) |

| Width | 40 mm (1.6 inches) | 50 mm (2 inches) |

| Production status | Active | End-of-life |

| Release date | 2023-12-07 | 2022-05-09 |

| Launch MSRP | None recorded | 1,099 USD |

| Average benchmark score | 70,829 | 58,392 |

| Percentile vs all GPUs | 91 | 88 |