AMD Radeon RX 7600M XT vs NVIDIA GeForce GTX 660 Ti Comparison

Where Each One Wins

The data splits cleanly across generations and workloads. The AMD Radeon RX 7600M XT wins every recorded head-to-head benchmark against the NVIDIA GeForce GTX 660 Ti, with two decisive victories in the shared tests. The GTX 660 Ti, a Kepler-era part from the GeForce 600 generation, posts an average benchmark score of 15063, while the RX 7600M XT averages 12710 across its broader test suite. That lower overall average reflects the RX 7600M XT's inclusion of older DirectX 9 and DirectX 10 tests, where modern architectures often score modestly, not a weakness in raw compute.

In the two tests both cards ran, the RX 7600M XT dominates. In Geekbench OpenCL, it scores 74869 versus 15113 for the GTX 660 Ti, a delta of -79.8% from the AMD card's perspective, meaning the NVIDIA part trails by roughly four-fifths. In Geekbench Vulkan, the RX 7600M XT scores 27793 versus 15012, a 46% gap. These are not close contests; they represent a full generational leap in compute throughput.

Where the older card retains relevance is in its specific niche. The GTX 660 Ti sits at the 57th percentile of all GPUs in the database, while the RX 7600M XT sits at the 52nd percentile. That percentile gap is notable because the RX 7600M XT's average is dragged down by its Passmark DirectX 9 (175), DirectX 10 (76), and DirectX 12 (58) scores, which are low relative to its compute potential. The GTX 660 Ti has no such low-end results recorded, so its percentile reflects a more consistent, if lower-magnitude, performance profile. For legacy API workloads, the older card's drivers and architecture may still hold up, but the data offers no direct comparison for those older tests.

Architecture Differences

The two GPUs represent opposite ends of a decade-long design evolution. The GTX 660 Ti uses the GK104 chip on TSMC's 28 nm process, with 3,540 million transistors on a 294 mm² die, yielding a transistor density of 12.0M / mm². The RX 7600M XT uses the Navi 33 chip on TSMC's 6 nm process, packing 13,300 million transistors into 204 mm², for a density of 65.2M / mm². That is a density advantage of more than five times, enabled by the smaller process node.

Architecturally, the GTX 660 Ti is Kepler, while the RX 7600M XT is RDNA 3.0. Kepler was designed for the GeForce 600 generation, with no dedicated ray tracing or tensor cores. RDNA 3.0 includes 32 ray accelerators (listed as rtCores), bringing hardware ray tracing support. The API support reflects this: the GTX 660 Ti supports DirectX 12 (11_0), while the RX 7600M XT supports DirectX 12 Ultimate (12_2). Both support OpenGL 4.6, but the Vulkan versions differ: 1.2.175 for NVIDIA versus 1.4 for AMD.

The memory subsystem is also generational. The GTX 660 Ti has 2 GB of GDDR5 on a 192-bit bus, delivering 144.2 GB/s bandwidth. The RX 7600M XT has 8 GB of GDDR6 on a 128-bit bus, delivering 288.0 GB/s. The narrower bus is more than compensated by the faster memory: 18 Gbps effective versus 6 Gbps effective. Clock speeds tell a similar story. The GTX 660 Ti runs at 915 MHz base and 980 MHz boost. The RX 7600M XT runs at 1280 MHz base, 2023 MHz game clock, and 2469 MHz boost. The AMD part's boost clock is more than 2.5 times the NVIDIA part's base clock.

The GTX 660 Ti is a dual-slot, 150 W card requiring two 6-pin power connectors and a 450 W power supply. It has a 241 mm (9.5 inch) PCB. The RX 7600M XT is an IGP (integrated graphics processor) with no slot width, no power connectors, and a 120 W TDP, designed for portable devices where display outputs are "Portable Device Dependent". The GTX 660 Ti offers 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2, while the AMD part's outputs depend on the host laptop.

Head-to-Head Benchmarks

The two shared tests are unambiguous. In Geekbench OpenCL, the RX 7600M XT scores 74869, against 15113 for the GTX 660 Ti. The delta of -79.8% is the largest margin in the entire head-to-head set. This is not a marginal win; the AMD part delivers nearly five times the OpenCL score. In Geekbench Vulkan, the RX 7600M XT scores 27793, versus 15012 for the GTX 660 Ti, a 46% advantage. While less extreme than the OpenCL gap, it still places the NVIDIA card firmly in second place.

These results align with the theoretical compute figures. The RX 7600M XT delivers 20.23 TFLOPS FP32, while the GTX 660 Ti delivers 2.634 TFLOPS. That is roughly a 7.7x raw float throughput difference, though real-world benchmarks compress it to the margins seen above. The RX 7600M XT also shows its RDNA 3.0 feature set in the Vulkan test, where its newer driver and API version (1.4 versus 1.2.175) likely contribute to the smaller but still decisive gap.

The GTX 660 Ti's nearest rivals in the database are AMD Radeon Pro 560X (avg 15082, delta -0.1%), AMD Radeon RX 7600 (avg 15171, delta -0.7%), NVIDIA GeForce RTX 3050 OEM (avg 15199, delta -0.9%), and AMD Radeon 680M (avg 15270, delta -1.4%). All four sit within 1.4% of the GTX 660 Ti's average score, meaning the Kepler card is closely matched with those mid-range parts in overall database standings. The RX 7600M XT's rivals are different: NVIDIA GeForce GTX 670 (avg 12773, delta -0.5%), NVIDIA Tesla K20Xm (avg 12625, delta 0.7%), NVIDIA GeForce GTX 590 (avg 12830, delta -0.9%), and AMD Radeon Pro 455 (avg 12831, delta -0.9%). The RX 7600M XT's average score of 12710 places it in the company of older high-end NVIDIA parts, not modern mid-range ones, due to its low legacy API scores.

Specification Differences

The table below lists only the fields where the two GPUs differ.

| Specification | NVIDIA GeForce GTX 660 Ti | AMD Radeon RX 7600M XT |

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

| Architecture | Kepler | RDNA 3.0 |

| Chip | GK104 | Navi 33 |

| Generation | GeForce 600 | Navi Mobile (RX 7000M) |

| Process Node | 28 nm | 6 nm |

| Transistors | 3,540 million | 13,300 million |

| Die Size | 294 mm² | 204 mm² |

| Transistor Density | 12.0M / mm² | 65.2M / mm² |

| Base Clock | 915 MHz | 1280 MHz |

| Boost Clock | 980 MHz | 2469 MHz |

| Game Clock | None | 2023 MHz |

| Memory Clock | 1502 MHz, 6 Gbps effective | 2250 MHz, 18 Gbps effective |

| Memory Size | 2 GB | 8 GB |

| Memory Type | GDDR5 | GDDR6 |

| Memory Bus Width | 192 bit | 128 bit |

| Memory Bandwidth | 144.2 GB/s | 288.0 GB/s |

| Shading Units | 1344 | 2048 |

| TMUs | 112 | 128 |

| ROPs | 24 | 64 |

| RT Cores | None | 32 |

| Pixel Rate | 27.44 GPixel/s | 158.0 GPixel/s |

| Texture Rate | 109.8 GTexel/s | 316.0 GTexel/s |

| FP32 | 2.634 TFLOPS | 20.23 TFLOPS |

| FP16 | None | 40.45 TFLOPS (2:1) |

| TDP | 150 W | 120 W |

| Slot Width | Dual-slot | IGP |

| Power Connectors | 2x 6-pin | None |

| Suggested PSU | 450 W | None |

| Bus Interface | PCIe 3.0 x16 | PCIe 4.0 x16 |

| Display Outputs | 2x DVI, 1x HDMI 1.4a, 1x DisplayPort 1.2 | Portable Device Dependent |

| DirectX | 12 (11_0) | 12 Ultimate (12_2) |

| Vulkan | 1.2.175 | 1.4 |

| Production Status | End-of-life | Active |

| Release Date | 2012-08-15 | 2023-01-03 |

| Predecessor | GeForce 500 | Polaris Mobile |

| Successor | GeForce 700 | None |

| Launch MSRP | 299 USD | None |

FAQ

Q: Which GPU has more raw compute throughput?

A: The AMD Radeon RX 7600M XT delivers 20.23 TFLOPS FP32, versus 2.634 TFLOPS for the GTX 660 Ti. The AMD part also supports FP16 at 40.45 TFLOPS (2:1), which the NVIDIA card lacks entirely.

Q: How do the memory subsystems compare?

A: The RX 7600M XT has 8 GB GDDR6 on a 128-bit bus with 288.0 GB/s bandwidth. The GTX 660 Ti has 2 GB GDDR5 on a 192-bit bus with 144.2 GB/s. Despite the narrower bus, the AMD part delivers exactly double the bandwidth.

Q: Are these cards comparable for modern gaming?

A: The RX 7600M XT supports DirectX 12 Ultimate (12_2) and Vulkan 1.4, plus hardware ray tracing via 32 RT cores. The GTX 660 Ti supports DirectX 12 (11_0) and Vulkan 1.2.175 with no ray tracing. The data shows the AMD part wins Geekbench Vulkan by 46%.

Q: What are the physical and power requirements?

A: The GTX 660 Ti is a dual-slot card at 150 W, requiring two 6-pin power connectors and a 450 W suggested PSU. It measures 241 mm (9.5 inches). The RX 7600M XT is an IGP at 120 W with no power connectors, designed for portable devices.

Q: How do their database percentiles compare?

A: The GTX 660 Ti sits at the 57th percentile of all GPUs, while the RX 7600M XT sits at the 52nd. This is despite the AMD card winning all head-to-head tests, because its average score includes low Passmark DirectX 9, 10, and 12 results.

Q: Which GPU has a higher average benchmark score?

A: The GTX 660 Ti averages 15063, while the RX 7600M XT averages 12710. However, this is misleading: the AMD card's average includes legacy API tests (Passmark DirectX 9 at 175, DirectX 10 at 76, DirectX 12 at 58) that drag it down. In the two shared tests, the AMD card wins by 79.8% and 46%.

The Verdict

The data points to a clear conclusion: the AMD Radeon RX 7600M XT is the superior processor in raw performance and modern feature support. It wins both head-to-head benchmarks decisively, offers 8 GB of memory versus 2 GB, doubles the memory bandwidth, supports ray tracing, and delivers nearly eight times the FP32 throughput. Its 120 W TDP is lower than the GTX 660 Ti's 150 W, and it requires no power connectors, making it far more efficient for portable devices.

The NVIDIA GeForce GTX 660 Ti retains one statistical advantage: its average benchmark score is higher (15063 versus 12710) and its percentile is better (57 versus 52). This is a function of test selection, not performance. The GTX 660 Ti's database profile lacks the low legacy API scores that pull down the AMD part's average. For users who care about consistent performance across older DirectX 9 and DirectX 10 workloads, the GTX 660 Ti's profile is smoother, but that is a narrow use case for a card released in August 2012.

For any modern workload, the RX 7600M XT is the only rational pick. It is an active product, built on a 6 nm process with 13,300 million transistors, and it supports the latest DirectX and Vulkan standards. The GTX 660 Ti is end-of-life, with its successor (GeForce 700) already released. The RX 7600M XT's nearest rivals include the NVIDIA GeForce GTX 670 and GTX 590, both older high-end parts, which places it in a performance tier that the GTX 660 Ti cannot reach based on the recorded head-to-head results. The verdict is unambiguous: choose the RX 7600M XT for performance, feature support, and efficiency; choose the GTX 660 Ti only if the specific legacy API profile matters more than every other measured metric.