AMD Radeon RX 6600 XT vs AMD Radeon RX 6700M Comparison

The AMD Radeon RX 6700M and AMD Radeon RX 6600 XT are both RDNA 2.0 parts from the RX 6000 series, but they target different segments: one is a mobile IGP, the other a dual-slot desktop card. The benchmark data shows a split personality: the RX 6700M takes the modern API workloads, while the RX 6600 XT dominates legacy and compute tests. Across 11 head-to-head benchmarks, the RX 6600 XT wins 7, but the RX 6700M secures the biggest single margin in a key next-gen test. The average benchmark scores sit close—25,633 for the 6700M versus 24,442 for the 6600 XT—but how those averages are built tells the real story.

Head-to-Head Benchmarks

The most striking result in this comparison is Geekbench Vulkan, where the RX 6700M posts 90,816 against the RX 6600 XT’s 72,417. That is a 25.4% lead for the mobile part, the largest delta in either direction across all tests. This is not a small edge; it suggests the 6700M’s architecture handles Vulkan workloads substantially better, despite its lower desktop clock speeds. In 3DMark Steel Nomad DX12, the 6700M also leads, scoring 1,845 to 1,804, a 2.3% advantage. Geekbench Metal follows the same pattern: 91,911 versus 88,720, a 3.6% win for the 6700M. Even in PassMark DirectX 12, the 6700M edges ahead, 65 to 61, a 6.6% margin. These four wins for the 6700M all come in modern, low-level or cross-platform APIs.

The RX 6600 XT’s wins are broader and often larger. PassMark G2D is its biggest victory: 912 versus 555, a 39.1% blowout that reflects a massive advantage in 2D graphics performance. PassMark GPU Compute shows a 31% lead for the 6600 XT (7,520 versus 5,191), indicating its compute shaders are far more efficient in this benchmark. In PassMark DirectX 11, the 6600 XT scores 163 against 129, a 20.9% gap, and in PassMark DirectX 9 it leads 194 to 155, a 20.1% margin. PassMark DirectX 10 is closer but still favors the 6600 XT: 109 versus 92, a 15.6% difference. The most important overall metric, PassMark G3D, goes to the 6600 XT decisively: 16,461 versus 13,536, a 17.8% advantage. Geekbench OpenCL is the only compute test the 6700M loses narrowly, with the 6600 XT ahead at 80,503 versus 77,666, a 3.5% margin.

The pattern is clear: the 6700M wins the tests that matter for future-facing gaming (Vulkan, DX12, Metal), while the 6600 XT dominates everything older and most compute-oriented workloads. The 6700M’s 4 wins include the two highest-profile modern benchmarks, but the 6600 XT’s 7 wins include the aggregate gaming score (G3D) and the compute score, which weigh heavily in real-world usage.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6700M has a higher average benchmark score of 25,633, compared to the RX 6600 XT’s 24,442. That is a difference of about 4.9% in favor of the mobile chip, despite the 6600 XT winning more individual tests.

Q: How do these cards rank against all other GPUs?

A: The RX 6700M sits in the 71st percentile of all GPUs, while the RX 6600 XT is in the 70th percentile. Both are statistically near the middle of the pack, with the 6700M having a marginal percentile edge.

Q: What is the biggest single benchmark gap between them?

A: The largest gap is in PassMark G2D, where the RX 6600 XT leads by 39.1% (912 versus 555). The second largest is in Geekbench Vulkan, where the RX 6700M leads by 25.4% (90,816 versus 72,417).

Q: Which card is closer to its nearest rival in the overall standings?

A: The RX 6700M’s nearest rival is the AMD Radeon Pro W5700, which is only 0.4% behind in average score. The RX 6600 XT’s nearest rival is the NVIDIA GeForce GTX 1630, which is 0.7% behind the 6600 XT. Both cards are tightly bunched with their competition.

Q: Does the RX 6600 XT win in any modern API test?

A: No. In 3DMark Steel Nomad DX12, Geekbench Metal, and Geekbench Vulkan, the RX 6700M wins all three. The RX 6600 XT’s wins are confined to PassMark DirectX 9/10/11 tests and OpenCL/G2D/G3D/compute workloads.

Q: How do their PassMark DirectX 12 scores compare?

A: The RX 6700M wins PassMark DirectX 12 with a score of 65, versus 61 for the RX 6600 XT, a 6.6% advantage. This is one of the few DirectX tests where the mobile part comes out ahead.

Architecture Differences

Both GPUs are built on TSMC’s 7 nm process and use the RDNA 2.0 architecture, but they are distinct chips. The RX 6700M uses the Navi 22 die, which is substantially larger at 335 mm² and contains 17,200 million transistors. The RX 6600 XT uses the smaller Navi 23 die at 237 mm² with 11,060 million transistors. This size difference translates to a higher transistor density for the 6700M: 51.3 million transistors per mm², versus 46.7 million for the 6600 XT. Both have 64 ROPs, but the 6700M has more shading units (2,304 versus 2,048), more texture mapping units (144 versus 128), and more ray tracing cores (36 versus 32). Neither GPU has tensor cores.

The memory subsystems differ significantly. The RX 6700M has 10 GB of GDDR6 on a 160-bit bus, yielding 320 GB/s of bandwidth. The RX 6600 XT has 8 GB on a 128-bit bus, providing 256 GB/s. Both run memory at 16 Gbps effective. The 6700M’s larger L2 cache and wider bus are likely contributors to its Vulkan and DX12 wins, as those APIs can leverage bandwidth more effectively. The 6600 XT compensates with higher clocks—its boost is 2,589 MHz versus 2,400 MHz for the 6700M—but the 6700M’s raw resource count (more shaders, TMUs, RT cores) gives it an edge in compute-heavy modern scenes.

The RX 6700M is a mobile IGP with no power connectors and a 135 W TDP, while the RX 6600 XT is a dual-slot desktop card with a 160 W TDP and a single 8-pin connector. The 6600 XT also has a wider PCIe interface at 4.0 x8, while the 6700M uses PCIe 4.0 x16. Both support DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Specification Differences

The two cards differ in nearly every measurable specification except for architecture, process node, memory type, ROP count, and API support. The RX 6700M has a larger die (335 mm² vs 237 mm²), more transistors (17,200M vs 11,060M), and higher transistor density (51.3M/mm² vs 46.7M/mm²). Its base clock is lower (1,489 MHz vs 1,968 MHz), but its game clock is closer (2,300 MHz vs 2,359 MHz), and its boost clock is lower (2,400 MHz vs 2,589 MHz). Memory favors the 6700M: 10 GB versus 8 GB, 160-bit versus 128-bit bus, and 320 GB/s versus 256 GB/s bandwidth. The 6700M has 2,304 shading units, 144 TMUs, and 36 RT cores; the 6600 XT has 2,048, 128, and 32, respectively.

Pixel rate is slightly higher on the 6600 XT (165.7 GPixel/s vs 153.6 GPixel/s), as is texture rate (331.4 GTexel/s vs 345.6 GTexel/s—wait, the 6700M is higher at 345.6). FP32 performance is 11.06 TFLOPS for the 6700M versus 10.60 TFLOPS for the 6600 XT. TDP is lower for the 6700M (135 W vs 160 W). The 6600 XT has specific dimensions (190 mm length, 110 mm height, 40 mm width), while the 6700M is an IGP with no listed size. The 6600 XT has a suggested PSU of 450 W and a launch MSRP of 379 USD. The 6700M has no launch MSRP and no PSU recommendation.

Where Each One Wins

The RX 6700M is the pick for modern, API-forward gaming. Its 25.4% Vulkan lead and 3.6% Metal advantage make it the better choice for titles that use those APIs, which includes many cross-platform games and future DX12-heavy releases. Its 2.3% lead in 3DMark Steel Nomad DX12 reinforces this. If you are playing games that prioritize Vulkan or DX12, the 6700M’s higher bandwidth and more shading units will deliver smoother frame pacing. It also has more VRAM (10 GB vs 8 GB), which helps with high-resolution textures in newer titles.

The RX 6600 XT is the winner for legacy DirectX titles, compute workloads, and overall 2D/3D rasterization in older benchmarks. Its 39.1% G2D lead and 17.8% G3D advantage mean it will feel snappier in desktop use and in games built on DX9, DX10, or DX11. The 31% compute lead (PassMark GPU Compute) makes it better for OpenCL-based tasks like video encoding or physics simulation. The 6600 XT also wins Geekbench OpenCL by 3.5%, so if your workload uses that API, the desktop card is superior.

For a laptop user, the 6700M’s lower TDP (135 W vs 160 W) and IGP form factor are inherent advantages—it fits in a mobile chassis. For a desktop builder, the 6600 XT’s dual-slot design, 8-pin connector, and 450 W PSU recommendation make it a straightforward drop-in card.

The Verdict

The data does not crown a single winner; it splits by use case. If your priority is modern game APIs—Vulkan, DX12, Metal—the AMD Radeon RX 6700M is the stronger card. It wins the three most forward-looking benchmarks (Vulkan by 25.4%, Metal by 3.6%, Steel Nomad by 2.3%) and offers 10 GB of VRAM, which is more future-proof for texture-heavy titles. Its higher average benchmark score (25,633 vs 24,442) and better percentile ranking (71st vs 70th) confirm it is slightly better overall in a weighted average.

If your priorities are legacy game compatibility, compute throughput, or 2D performance, the AMD Radeon RX 6600 XT is clearly ahead. It wins PassMark G3D by 17.8% and GPU Compute by 31%, making it the better all-rounder for older game libraries and non-gaming GPU tasks. It also has a higher boost clock (2,589 MHz) and a lower launch price (379 USD as launch MSRP), though that price point should not be read as a value judgment here.

The 6600 XT wins more individual tests (7 versus 4), but the 6700M wins the tests that matter most for the next generation of games. Choose the 6700M if you play modern titles on Vulkan or DX12. Choose the 6600 XT if you need raw compute, legacy DirectX performance, or desktop 2D responsiveness. Both are end-of-life products, so availability and system compatibility (mobile IGP versus desktop card) will likely decide the practical choice.