AMD Radeon RX 6600 vs AMD Radeon RX 7700 XT Comparison

Head-to-Head Benchmarks

The benchmark data presents a decisive picture. Across ten recorded tests, the AMD Radeon RX 7700 XT claims nine victories over the AMD Radeon RX 6600. The most staggering margin appears in the Geekbench OpenCL test, where the RX 7700 XT scores 138,383 against 28,850, a 379.7% advantage. That is not a marginal improvement; it represents a completely different class of compute throughput.

3DMark Steel Nomad DX12 tells a similar story. The RX 7700 XT posts 3,316 points, while the RX 6600 manages 1,492. The delta of 122.3% means the newer card more than doubles the older one’s performance in this demanding DirectX 12 workload. For gamers targeting modern titles with ray tracing and high resolutions, this gap is the headline number.

PassMark results reinforce the pattern. In PassMark G3D, the RX 7700 XT scores 22,547 against 15,096, a 49.4% lead. PassMark GPU Compute shows 12,912 versus 6,554, a 97% advantage. Even legacy API tests favor the RX 7700 XT: DirectX 9 scores 294 versus 197 (49.2% higher), DirectX 10 scores 119 versus 95 (25.3% higher), DirectX 11 scores 232 versus 152 (52.6% higher), and DirectX 12 scores 79 versus 51 (54.9% higher). The 2D test, PassMark G2D, also goes to the RX 7700 XT at 1,161 versus 889, a 30.6% edge.

The single exception is Geekbench Vulkan. Here, the RX 6600 wins with 67,623 points against 46,443, a 31.3% advantage in the RX 7700 XT’s disfavor. This is an odd outlier, but it is a genuine data point. The RX 6600’s Vulkan driver or architecture appears to handle that specific workload more efficiently. Still, one win out of ten is not a trend.

Averaging all benchmark scores, the RX 7700 XT sits at 22,549 while the RX 6600 sits at 19,036. The RX 7700 XT also occupies the 67th percentile of all GPUs in the database, versus the RX 6600’s 63rd percentile. In terms of nearest rivals, the RX 7700 XT trades blows with the NVIDIA GeForce RTX 5060 Mobile (0.5% ahead), RTX 4060 Mobile (0.8% behind), RTX 2080 (1.5% behind), and AMD Radeon RX 5700 (1.7% ahead). The RX 6600 sits alongside the NVIDIA Quadro K6000 (0% delta), RTX 4050 Mobile (0.1% behind), Tesla K20m (0.3% behind), and RTX 2000 Ada Generation (0.4% ahead). The data places the RX 7700 XT in a higher performance tier entirely.

FAQ

Q: Which card wins in raw compute benchmarks?

A: The AMD Radeon RX 7700 XT dominates. In Geekbench OpenCL, it scores 138,383 versus 28,850, a 379.7% lead. In PassMark GPU Compute, it scores 12,912 versus 6,554, a 97% lead.

Q: Is there any test where the RX 6600 beats the RX 7700 XT?

A: Yes, in Geekbench Vulkan. The RX 6600 scores 67,623 versus 46,443, a 31.3% advantage. This is the only win for the RX 6600 across the ten recorded benchmarks.

Q: How do the cards compare in DirectX 12 gaming workloads?

A: The RX 7700 XT is substantially faster. In 3DMark Steel Nomad DX12, it scores 3,316 versus 1,492, a 122.3% delta. In PassMark DirectX 12, it scores 79 versus 51, a 54.9% delta.

Q: What is the average benchmark score for each card?

A: The RX 7700 XT has an average benchmark score of 22,549. The RX 6600 has an average benchmark score of 19,036. The RX 7700 XT sits at the 67th percentile of all GPUs, while the RX 6600 sits at the 63rd percentile.

Q: How does the RX 7700 XT compare to its nearest rivals?

A: The RX 7700 XT is 0.5% ahead of the NVIDIA GeForce RTX 5060 Mobile, 0.8% behind the RTX 4060 Mobile, 1.5% behind the RTX 2080, and 1.7% ahead of the AMD Radeon RX 5700.

Q: How does the RX 6600 compare to its nearest rivals?

A: The RX 6600 is exactly level with the NVIDIA Quadro K6000 (0% delta), 0.1% behind the RTX 4050 Mobile, 0.3% behind the Tesla K20m, and 0.4% ahead of the RTX 2000 Ada Generation.

Architecture Differences

The two cards come from different generations of AMD’s GPU design. The RX 7700 XT is built on RDNA 3.0 architecture, using the Navi 32 chip, and belongs to the Radeon RX 7000 series with the codename “Wheat Nas.” The RX 6600 uses RDNA 2.0 architecture with the Navi 23 chip, part of the Radeon RX 6000 series. This generational leap is visible in the manufacturing process: the RX 7700 XT is fabbed on a 5 nm TSMC node, while the RX 6600 uses a 7 nm TSMC node.

Transistor counts reflect the architectural shift. The RX 7700 XT packs 28,100 million transistors on a 346 mm² die, yielding a transistor density of 81.2 million per mm². The RX 6600 carries 11,060 million transistors on a 237 mm² die, with a density of 46.7 million per mm². The newer process allows the RX 7700 XT to fit more than twice the transistors in a die that is only about 46% larger by area.

Compute resources also differ sharply. The RX 7700 XT has 3,456 shading units, 216 texture mapping units, 96 render output units, and 54 ray tracing cores. The RX 6600 has 1,792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores. The RX 7700 XT doubles the shading units, TMUs, and RT cores, while increasing ROPs by 50%.

The floating-point output tells a tale of two architectures. The RX 7700 XT delivers 35.17 TFLOPS FP32 and an identical 35.17 TFLOPS FP16 (1:1 ratio). The RX 6600 delivers 8.928 TFLOPS FP32 and 17.86 TFLOPS FP16 (2:1 ratio). The RX 7700 XT’s FP16 performance is nearly quadruple that of the RX 6600, but the RX 6600’s 2:1 FP16 rate shows it was optimized for a different workload balance. The RX 7700 XT’s 1:1 ratio suggests a more modern approach to shader execution.

Memory architecture also differs. The RX 7700 XT uses 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth. The RX 6600 uses 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. The RX 7700 XT offers 50% more memory capacity and roughly double the bandwidth.

Specification Differences

Clock speeds show a nuanced comparison. The RX 7700 XT has a base clock of 1435 MHz, a boost clock of 2544 MHz, and a game clock of 2171 MHz. The RX 6600 has a higher base clock at 1626 MHz, a boost clock of 2491 MHz, and a game clock of 2044 MHz. The RX 6600 starts faster but tops out lower; the RX 7700 XT has more headroom and a higher final boost.

Memory clocks differ significantly. The RX 7700 XT runs memory at 2250 MHz (18 Gbps effective), while the RX 6600 runs at 1750 MHz (14 Gbps effective). This contributes to the bandwidth gap.

Power requirements are not comparable. The RX 7700 XT has a TDP of 245 W and requires a 550 W suggested power supply, with two 8-pin power connectors. The RX 6600 has a TDP of 132 W, a 300 W suggested PSU, and a single 8-pin connector. The RX 7700 XT demands roughly 86% more power budget.

Interface and display outputs also differ. The RX 7700 XT uses PCIe 4.0 x16, while the RX 6600 uses PCIe 4.0 x8. The RX 7700 XT offers 1x HDMI 2.1a, 2x DisplayPort 2.1, and 1x USB Type-C. The RX 6600 offers 1x HDMI 2.1 and 3x DisplayPort 1.4a. The RX 7700 XT’s DisplayPort 2.1 support is a generational upgrade over the RX 6600’s DisplayPort 1.4a.

Physical dimensions differ. The RX 7700 XT is 267 mm long, 135 mm high, and 50 mm wide. The RX 6600 is 190 mm long, 110 mm high, and 40 mm wide. Both are dual-slot cards, but the RX 7700 XT is significantly larger.

Production status differs: the RX 7700 XT is active, while the RX 6600 is end-of-life. Release dates are recorded as 2023 for the RX 7700 XT and 2021 for the RX 6600.

The Verdict

The data points to a clear hierarchy. The AMD Radeon RX 7700 XT is the faster card in almost every recorded metric. It wins nine of ten benchmarks, including the most demanding modern tests. The 122.3% lead in 3DMark Steel Nomad DX12 and the 379.7% lead in Geekbench OpenCL are not subtle. The RX 7700 XT belongs to a performance class that sits alongside the NVIDIA RTX 2080 and RTX 4060 Mobile, whereas the RX 6600 sits alongside the Quadro K6000 and RTX 4050 Mobile.

The one meaningful caveat is the Geekbench Vulkan result. The RX 6600’s 31.3% advantage there is unusual and worth noting for developers targeting Vulkan specifically. But a single workload does not outweigh nine others, especially when the losses include every DirectX iteration from 9 through 12 Ultimate.

For gamers, the RX 7700 XT’s higher texture rate (549.5 GTexel/s versus 279.0 GTexel/s) and pixel rate (244.2 GPixel/s versus 159.4 GPixel/s) translate directly to higher frame rates at higher resolutions. The 12 GB memory capacity versus 8 GB also provides more headroom for modern textures and ray tracing workloads.

For those with power constraints, the RX 6600 is the more modest option. It draws 132 W versus 245 W, and its smaller 190 mm length fits in compact cases. But the performance penalty is steep: the RX 6600’s average benchmark score is 19,036, roughly 15% lower than the RX 7700 XT’s 22,549.

The verdict from the database is straightforward. The RX 7700 XT is the superior performer for demanding workloads and modern gaming. The RX 6600 remains a viable entry point for lighter tasks and constrained builds, but it is a previous-generation product in an earlier production status. Anyone choosing between these two should consider the RX 7700 XT the primary option unless the specific Vulkan workload or power envelope dictates otherwise.