AMD Radeon RX 6600 LE vs NVIDIA TITAN X Pascal Comparison

The NVIDIA TITAN X Pascal and AMD Radeon RX 6600 LE occupy nearly the same performance tier according to aggregate benchmark data, with the TITAN X Pascal averaging a score of 72,098 and the RX 6600 LE averaging 70,829. The 1.8% delta in the TITAN's favor places both cards at the 91st percentile among all GPUs, but their underlying designs could hardly be more different. This comparison dissects where each part leads, how their architectures diverge, and what the head-to-head numbers reveal about their respective strengths.

Where Each One Wins

The split in benchmark victories is exactly even: each card claims one win in the two head-to-head tests. The AMD Radeon RX 6600 LE takes the Geekbench OpenCL test with a score of 69,229, outpacing the TITAN X Pascal's 66,696 by a 3.7% margin. This result is notable because the RX 6600 LE achieves it with substantially fewer shading units (1,792 vs. 3,584) and a narrower memory bus (128-bit vs. 384-bit). The OpenCL workload appears to favor the RX 6600 LE's higher boost clock of 2,495 MHz and its RDNA 2.0 architecture's efficiency.

The NVIDIA TITAN X Pascal counters decisively in the Geekbench Vulkan test, scoring 77,499 against the RX 6600 LE's 72,428 — a 7% advantage. This is the larger of the two deltas, suggesting that Vulkan compute workloads respond well to the TITAN's massive 3,584 shading units and 96 ROPs. The TITAN's Pascal architecture, despite being older, demonstrates its compute prowess in this API. In the broader context of nearest rivals, the RX 6600 LE sits just 1.3% behind the AMD Radeon RX 6650M and 1% ahead of the NVIDIA RTX A3000 Mobile, while the TITAN X Pascal is 0.5% ahead of the same RX 6650M and 0.4% behind the AMD Radeon Pro Vega 64.

Architecture Differences

The two GPUs represent fundamentally different design philosophies separated by seven years of process technology evolution. The TITAN X Pascal uses NVIDIA's Pascal architecture on a 16 nm TSMC process, packing 11,800 million transistors into a 471 mm² die for a transistor density of 25.1M per mm². The RX 6600 LE employs AMD's RDNA 2.0 architecture on a 7 nm TSMC process, fitting 11,060 million transistors into a much smaller 237 mm² die — nearly half the area — achieving a density of 46.7M per mm².

The compute configuration diverges sharply. The TITAN X Pascal fields 3,584 shading units, 224 texture mapping units, and 96 ROPs, while the RX 6600 LE uses 1,792 shading units, 112 TMUs, and 64 ROPs. The RX 6600 LE does include 28 ray tracing cores, which the TITAN X Pascal lacks entirely, reflecting its 2016-era design. In raw FP32 throughput, the TITAN's 10.97 TFLOPS exceeds the RX 6600 LE's 8.942 TFLOPS, but AMD's card offers 17.88 TFLOPS of FP16 performance at a 2:1 ratio, whereas the TITAN's FP16 is a minuscule 171.5 GFLOPS at a 1:64 ratio.

Memory subsystems could not be more different. The TITAN X Pascal pairs 12 GB of GDDR5X on a 384-bit bus with 480.4 GB/s of bandwidth, while the RX 6600 LE uses 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s. The TITAN's bandwidth advantage is enormous — more than double — but the RX 6600 LE's pixel rate of 159.7 GPixel/s actually edges out the TITAN's 147.0 GPixel/s due to its higher clocks. The TITAN's texture rate of 342.9 GTexel/s beats the RX 6600 LE's 279.4 GTexel/s.

Power and interface differences are stark. The TITAN X Pascal draws a 250 W TDP with a 600 W suggested PSU and requires both a 6-pin and 8-pin connector. The RX 6600 LE sips 132 W with a 300 W suggested PSU and a single 8-pin connector. The TITAN uses PCIe 3.0 x16, while the RX 6600 LE uses PCIe 4.0 x8. The TITAN's display outputs include a DVI port alongside HDMI 2.0 and three DisplayPort 1.4a connections, whereas the RX 6600 LE offers HDMI 2.1 and three DisplayPort 1.4a outputs.

FAQ

Q: Which card has the higher average benchmark score?

A: The NVIDIA TITAN X Pascal averages 72,098 across all benchmark tests, while the AMD Radeon RX 6600 LE averages 70,829. This gives the TITAN a 1.8% advantage according to the nearestRivals data.

Q: How do the two cards compare in memory bandwidth?

A: The TITAN X Pascal offers 480.4 GB/s of bandwidth from 12 GB of GDDR5X on a 384-bit bus, while the RX 6600 LE provides 224.0 GB/s from 8 GB of GDDR6 on a 128-bit bus. The TITAN's bandwidth is more than double that of the RX 6600 LE.

Q: Which GPU has the higher boost clock?

A: The AMD Radeon RX 6600 LE boosts to 2,495 MHz, significantly higher than the TITAN X Pascal's 1,531 MHz boost clock. The RX 6600 LE also has a higher base clock at 1,626 MHz versus 1,417 MHz.

Q: Does either card support ray tracing?

A: The AMD Radeon RX 6600 LE includes 28 ray tracing cores as part of its RDNA 2.0 architecture. The NVIDIA TITAN X Pascal has no ray tracing cores, as it predates that feature.

Q: What is the transistor density difference between the two?

A: The RX 6600 LE achieves 46.7M transistors per mm² on a 237 mm² die, while the TITAN X Pascal achieves 25.1M per mm² on a 471 mm² die. The RX 6600 LE's 7 nm process allows nearly twice the density.

Q: Which card is larger physically?

A: The TITAN X Pascal measures 267 mm in length, 112 mm in height, and 40 mm in width. The RX 6600 LE is shorter at 190 mm, with a similar height of 110 mm and the same 40 mm width. Both are dual-slot cards.

Specification Differences

The two cards differ in nearly every major specification category. The TITAN X Pascal uses the GP102 chip on 16 nm with 11,800 million transistors, while the RX 6600 LE uses Navi 23 on 7 nm with 11,060 million transistors. Die size differs from 471 mm² to 237 mm². Clock speeds favor the RX 6600 LE: base 1,626 MHz vs. 1,417 MHz, boost 2,495 MHz vs. 1,531 MHz, and memory 1,750 MHz (14 Gbps effective) vs. 1,251 MHz (10 Gbps effective).

Memory configuration differs substantially: 12 GB GDDR5X on a 384-bit bus with 480.4 GB/s vs. 8 GB GDDR6 on a 128-bit bus with 224.0 GB/s. Compute units differ with 3,584 shading units, 224 TMUs, and 96 ROPs on the TITAN vs. 1,792 shading units, 112 TMUs, and 64 ROPs on the RX 6600 LE. The RX 6600 LE adds 28 RT cores.

Performance rates show a mixed picture: the TITAN leads in texture rate (342.9 GTexel/s vs. 279.4 GTexel/s) and FP32 (10.97 TFLOPS vs. 8.942 TFLOPS), but the RX 6600 LE wins in pixel rate (159.7 GPixel/s vs. 147.0 GPixel/s) and FP16 (17.88 TFLOPS vs. 171.5 GFLOPS). Power requirements favor the RX 6600 LE at 132 W vs. 250 W, with a 300 W vs. 600 W suggested PSU. The TITAN requires dual power connectors (6-pin plus 8-pin) versus the RX 6600 LE's single 8-pin.

Connectivity differs: the TITAN uses PCIe 3.0 x16, while the RX 6600 LE uses PCIe 4.0 x8. Display outputs include DVI, HDMI 2.0, and three DisplayPort 1.4a on the TITAN, versus HDMI 2.1 and three DisplayPort 1.4a on the RX 6600 LE. DirectX support differs with 12 (12_1) on the TITAN and 12 Ultimate (12_2) on the RX 6600 LE. The TITAN is end-of-life, released in August 2016, while the RX 6600 LE is active, released in December 2023.

Head-to-Head Benchmarks

The Geekbench OpenCL test delivers a clear win for the AMD Radeon RX 6600 LE. It scores 69,229 against the TITAN X Pascal's 66,696, a 3.7% delta. This result is particularly interesting given the TITAN's theoretical advantages: it has exactly twice the shading units (3,584 vs. 1,792), more than double the texture units, and over double the memory bandwidth. The RX 6600 LE wins despite these deficits because its RDNA 2.0 architecture and 2,495 MHz boost clock extract more effective compute throughput in this workload. The OpenCL score aligns with the RX 6600 LE's nearest rival data, where it sits just 1.3% behind the RX 6650M and ahead of the RTX A3000 Mobile by 1%.

The Geekbench Vulkan test flips the result decisively in favor of the NVIDIA TITAN X Pascal. The TITAN scores 77,499, surpassing the RX 6600 LE's 72,428 by 7%. This 7% margin is nearly double the RX 6600 LE's OpenCL advantage, making it the more significant single-test victory. The Vulkan result suggests that the TITAN's wider memory bus and higher bandwidth (480.4 GB/s vs. 224.0 GB/s) play a larger role in this API's workload characteristics. The TITAN's Pascal architecture, with its 96 ROPs and 10.97 TFLOPS FP32 throughput, also appears better suited to Vulkan's compute-heavy dispatch patterns.

Looking at the aggregate picture, the TITAN X Pascal's average score of 72,098 places it 1.8% ahead of the RX 6600 LE's 70,829. Both cards sit at the 91st percentile of all GPUs, indicating they belong to the same performance class despite their architectural differences. The TITAN's nearest rivals include the AMD Radeon Pro Vega 64 at 72,379 (0.4% ahead) and the AMD Radeon RX 6650M at 71,768 (0.5% behind), while the RX 6600 LE's nearest rivals include the NVIDIA RTX A3000 Mobile at 70,140 (1% behind) and the AMD Radeon Pro WX 8200 at 69,870 (1.4% behind).

The benchmark data tells a story of two different design trade-offs converging on similar overall performance. The TITAN X Pascal leverages massive compute resources, high bandwidth, and a wide memory bus to win in Vulkan, while the RX 6600 LE uses a modern 7 nm process, higher clocks, and architectural efficiency to win in OpenCL. The 7% Vulkan victory for the TITAN is the largest margin in either direction, indicating that NVIDIA's older flagship retains a meaningful edge in that specific API. Conversely, the RX 6600 LE's 3.7% OpenCL win shows that newer architectures can overcome significant hardware deficits through better instruction-level efficiency and higher operating frequencies.