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

Head-to-Head Benchmarks

The benchmark database records only two direct head-to-head comparisons between the AMD Radeon RX 7600 XT and the NVIDIA GeForce GTX 660 Ti, and the results are decisive in both cases. The AMD card wins both tests, and the margins are staggering, reflecting the generational chasm between a 2024 RDNA 3.0 part and a 2012 Kepler part.

In Geekbench OpenCL, the RX 7600 XT scores 92,426 against the GTX 660 Ti's 15,113. That is a delta of 511.6%, meaning the AMD card delivers more than six times the compute performance in this workload. OpenCL is a general-purpose compute API, and the data suggests the RX 7600 XT's 22.57 TFLOPS FP32 throughput, compared to the GTX 660 Ti's 2.634 TFLOPS, translates directly into an overwhelming advantage for any compute-heavy task. The GTX 660 Ti does not even report an FP16 figure in the database, while the RX 7600 XT lists 22.57 TFLOPS FP16 at a 1:1 ratio, further widening the gap in mixed-precision scenarios.

The Vulkan result is similarly one-sided. The RX 7600 XT posts 48,366, while the GTX 660 Ti manages 15,012, a delta of 222.2%. Vulkan is a low-overhead graphics API, and the RX 7600 XT's modern architecture, with support for Vulkan 1.4 versus the GTX 660 Ti's older 1.2.175 implementation, shows a 3.2x advantage in this test. Notably, the GTX 660 Ti's Vulkan score is nearly identical to its OpenCL score (15,012 vs 15,113), suggesting a hard performance ceiling regardless of the API, while the RX 7600 XT's Vulkan score is roughly half its OpenCL score, hinting that the AMD card's compute capabilities outpace its graphics-bound workloads in this particular benchmark.

The database records zero wins for the GTX 660 Ti across both head-to-head tests. This is not a close contest by any metric. The RX 7600 XT also sits at the 60th percentile among all GPUs, while the GTX 660 Ti sits at the 57th percentile, but that narrow percentile gap is misleading given the absolute score difference. The average benchmark score for the RX 7600 XT is 17,083, while the GTX 660 Ti averages 15,063, a gap of roughly 13%. However, that average includes many modern tests where the RX 7600 XT has full support (DirectX 12 Ultimate, Vulkan 1.4) and the GTX 660 Ti is limited to DirectX 12 (11_0) and Vulkan 1.2.175, so the true performance delta in modern workloads is far larger than the average suggests.

FAQ

Q: Which card wins in Geekbench OpenCL, and by how much?

A: The AMD Radeon RX 7600 XT wins decisively with a score of 92,426 versus the NVIDIA GeForce GTX 660 Ti's 15,113, a delta of 511.6%.

Q: Is the GTX 660 Ti competitive in any benchmark?

A: No. The database records zero wins for the GTX 660 Ti across the two head-to-head tests. Its best relative result is in Geekbench Vulkan, where it scores 15,012 versus 48,366, still a 222.2% deficit.

Q: What do the average benchmark scores indicate?

A: The RX 7600 XT has an average benchmark score of 17,083, placing it at the 60th percentile of all GPUs. The GTX 660 Ti averages 15,063, at the 57th percentile. Despite the percentile closeness, the absolute score gap is 2,020 points, and the RX 7600 XT's nearest rival is the NVIDIA GeForce RTX 3070 at 17,208, a delta of -0.7%, while the GTX 660 Ti's nearest rival is the AMD Radeon Pro 560X at 15,082, a delta of -0.1%.

Q: Does the GTX 660 Ti support modern APIs like the RX 7600 XT?

A: No. The RX 7600 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The GTX 660 Ti supports DirectX 12 (11_0), OpenGL 4.6, and Vulkan 1.2.175. The feature-level gap is substantial.

Q: Which card has more shading units?

A: The RX 7600 XT has 2,048 shading units, while the GTX 660 Ti has 1,344. The RX 7600 XT also has 128 texture mapping units and 64 ROPs, versus 112 TMUs and 24 ROPs on the GTX 660 Ti.

Q: How does memory capacity compare?

A: The RX 7600 XT has 16 GB of GDDR6 memory on a 128-bit bus with 288.0 GB/s bandwidth. The GTX 660 Ti has 2 GB of GDDR5 memory on a 192-bit bus with 144.2 GB/s bandwidth. The RX 7600 XT has 8x the capacity and 2x the bandwidth.

The Verdict

The data is unambiguous: the AMD Radeon RX 7600 XT is the superior card in every recorded benchmark. Its 511.6% lead in OpenCL and 222.2% lead in Vulkan are not marginal improvements; they represent a fundamental generational leap. The RX 7600 XT's average benchmark score of 17,083 places it near the NVIDIA GeForce RTX 3070 (17,208, only 0.7% behind), a card from a much higher tier in its own generation. The GTX 660 Ti, with an average score of 15,063, sits near the AMD Radeon RX 7600 (non-XT) at 15,171, which is telling: the RX 7600 XT's nearest rival list includes the RX 7600 itself, but the GTX 660 Ti's nearest rival is the AMD Radeon 680M integrated graphics, suggesting the old NVIDIA card is now competing with iGPU-class performance.

For anyone choosing between these two, the RX 7600 XT is the only rational pick for any modern workload. The GTX 660 Ti is end-of-life, lacks hardware ray tracing cores (the RX 7600 XT has 32), supports an older DirectX feature level, and offers only 2 GB of memory, which is inadequate for contemporary games or compute tasks. The RX 7600 XT, with 16 GB of memory, 2048 shading units, and 190 W TDP, is an active product with a clear path forward. The GTX 660 Ti, with 1344 shading units and 150 W TDP, is a legacy part that the database shows is outperformed by margin of 5x to 6x in compute workloads.

Specification Differences

The two cards differ in nearly every specification field. The RX 7600 XT uses a 6 nm process node from TSMC, while the GTX 660 Ti uses a 28 nm node, also TSMC. Transistor counts are 13,300 million versus 3,540 million, and die sizes are 204 mm² versus 294 mm², meaning the RX 7600 XT packs far more transistors into a smaller die, achieving a density of 65.2M / mm² versus 12.0M / mm².

Clock speeds differ dramatically: the RX 7600 XT has a base clock of 1980 MHz, a boost of 2755 MHz, and a game clock of 2470 MHz, while the GTX 660 Ti has a base of 915 MHz and a boost of 980 MHz. Memory clocks are 2250 MHz (18 Gbps effective) on the RX 7600 XT versus 1502 MHz (6 Gbps effective) on the GTX 660 Ti.

Memory configuration is another major split: 16 GB GDDR6 on a 128-bit bus versus 2 GB GDDR5 on a 192-bit bus. Bandwidth is 288.0 GB/s versus 144.2 GB/s. The RX 7600 XT has 2048 shading units, 128 TMUs, and 64 ROPs, while the GTX 660 Ti has 1344 shading units, 112 TMUs, and 24 ROPs. The RX 7600 XT also has 32 ray tracing cores; the GTX 660 Ti has none.

Pixel and texture rates reflect the hardware differences: the RX 7600 XT achieves 176.3 GPixel/s and 352.6 GTexel/s, versus 27.44 GPixel/s and 109.8 GTexel/s for the GTX 660 Ti. FP32 compute is 22.57 TFLOPS versus 2.634 TFLOPS.

Power and physical specs differ as well: the RX 7600 XT has a TDP of 190 W and a single 8-pin power connector, while the GTX 660 Ti has a TDP of 150 W and two 6-pin connectors. Both list a suggested PSU of 450 W. The RX 7600 XT is 204 mm (8 inches) long, while the GTX 660 Ti is 241 mm (9.5 inches) long. Bus interfaces are PCIe 4.0 x8 versus PCIe 3.0 x16. Display outputs are 1x HDMI 2.1a and 3x DisplayPort 2.1 on the RX 7600 XT, versus 2x DVI, 1x HDMI 1.4a, and 1x DisplayPort 1.2 on the GTX 660 Ti.

Architecture Differences

The RX 7600 XT is built on RDNA 3.0, codenamed Hotpink Bonefish, part of the Navi III (RX 7000) generation. The GTX 660 Ti is built on the Kepler architecture, using the GK104 chip, from the GeForce 600 generation. RDNA 3.0 is a modern, chiplet-ready design with explicit ray tracing support, while Kepler is a 2012-era monolithic architecture that predates hardware ray tracing entirely.

The process node difference is stark: 6 nm versus 28 nm. This explains the transistor density gap (65.2M / mm² versus 12.0M / mm²) and the massive compute advantage. The RX 7600 XT has 32 dedicated RT cores, a feature class that does not exist on the GTX 660 Ti. The API support also reflects architectural maturity: DirectX 12 Ultimate (12_2) versus DirectX 12 (11_0), and Vulkan 1.4 versus 1.2.175.

The RX 7600 XT has a 1:1 FP16 to FP32 ratio, meaning it can process half-precision and full-precision at the same rate, a feature absent on the GTX 660 Ti, which lists no FP16 capability in the database. This makes the RX 7600 XT far more suited to AI and compute workloads that benefit from reduced precision. The GTX 660 Ti's memory controller is wider (192-bit versus 128-bit), but the RX 7600 XT compensates with much faster GDDR6 memory and a higher effective clock, resulting in double the bandwidth.

Where Each One Wins

The RX 7600 XT wins every recorded benchmark, so the practical answer is that it wins everywhere the database measures. However, the data implies specific use-case strengths. The massive OpenCL lead (511.6%) suggests the RX 7600 XT is the clear choice for GPU compute tasks like rendering, scientific simulation, or machine learning inference. Its 16 GB memory capacity is 8x that of the GTX 660 Ti, which is critical for large datasets or high-resolution textures that would exhaust the older card's 2 GB. The Vulkan lead (222.2%) indicates that modern games using Vulkan will run dramatically better on the RX 7600 XT, and its DirectX 12 Ultimate support ensures compatibility with the latest titles that require feature level 12_2.

The GTX 660 Ti has no wins in the head-to-head data. Its only theoretical advantage is its lower 150 W TDP versus 190 W, but it requires two 6-pin power connectors instead of one 8-pin, so the power delivery footprint is not necessarily simpler. Its 192-bit memory bus is wider, but the effective bandwidth is still half that of the RX 7600 XT. The GTX 660 Ti could be considered for legacy system builds where PCIe 3.0 x16 is the only available slot, but the RX 7600 XT's PCIe 4.0 x8 interface is backward compatible and offers more bandwidth per lane. For any modern workload, the database records no scenario where the GTX 660 Ti is preferable. The RX 7600 XT is the only card with active production status, while the GTX 660 Ti is end-of-life. The verdict is not close: the RX 7600 XT is the definitive choice for compute, gaming, and future-proofing, while the GTX 660 Ti is a historical artifact that the data shows is outperformed by over 500% in compute and 200% in graphics API tests.