AMD Radeon RX 6600 LE vs NVIDIA Tesla T4 Comparison

FAQ

Q: How does the AMD Radeon RX 6600 LE compare to the NVIDIA Tesla T4 in overall benchmark scores?

A: The RX 6600 LE holds an average benchmark score of 70,829 across all tests, while the Tesla T4 averages 66,733. This places the RX 6600 LE at the 91st percentile of all GPUs and the Tesla T4 at the 90th percentile.

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

A: The AMD Radeon RX 6600 LE wins the Geekbench OpenCL test with a score of 69,229 against the Tesla T4’s 61,276. That is a 13% advantage for the AMD card.

Q: What about the Vulkan benchmark — is there a clear winner?

A: The RX 6600 LE also wins Vulkan, scoring 72,428 versus the Tesla T4’s 72,190. The margin is razor-thin at just 0.3%, making this essentially a tie in practical terms.

Q: How do the two cards’ closest rivals compare?

A: The RX 6600 LE’s nearest rival is the NVIDIA RTX A3000 Mobile at 70,140 (1% higher), while the Tesla T4’s closest competitor is the AMD Radeon VII at 66,004 (1.1% higher). The RX 6600 LE sits slightly below the AMD Radeon RX 6650M, which scores 71,768 (1.3% higher).

Q: What is the memory capacity difference between the two cards?

A: The Tesla T4 has 16 GB of GDDR6 memory on a 256-bit bus with 320.0 GB/s bandwidth. The RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth.

Q: Which card has tensor cores, and how many?

A: The NVIDIA Tesla T4 has 320 tensor cores, a feature entirely absent from the AMD Radeon RX 6600 LE, which lists no tensor core count.

The Verdict

The data splits cleanly into two distinct use cases. For raw compute performance in standard graphics APIs, the AMD Radeon RX 6600 LE is the stronger card — it wins both head-to-head benchmarks, with a decisive 13% lead in OpenCL and a marginal 0.3% edge in Vulkan. Its average benchmark score of 70,829 is 6.1% higher than the Tesla T4’s 66,733. Anyone prioritizing general GPU compute or gaming-oriented workloads should pick the RX 6600 LE based on these numbers.

However, the Tesla T4 is not without reason for selection. It offers double the memory (16 GB vs 8 GB) and a wider 256-bit memory bus with 320.0 GB/s bandwidth versus 224.0 GB/s. It also packs 320 tensor cores, which the AMD card lacks entirely. For workloads that depend on tensor operations or require large memory capacities, the Tesla T4 is the only option between the two that the data supports. Its 70 W TDP and single-slot design also make it far easier to integrate into dense server environments, though those are qualitative advantages from the spec sheet rather than benchmark results.

The verdict is not a blanket recommendation. The RX 6600 LE wins on pure benchmark scores and percentile placement (91st vs 90th). The Tesla T4 wins on memory capacity, memory bandwidth, tensor core availability, and power efficiency. Pick the RX 6600 LE for compute throughput; pick the Tesla T4 for tensor-heavy or memory-hungry tasks.

Head-to-Head Benchmarks

The head-to-head results show a two-test sweep for the AMD Radeon RX 6600 LE. In the Geekbench OpenCL test, the RX 6600 LE scores 69,229 against the Tesla T4’s 61,276, producing a 13% delta. This is the largest performance gap between the two cards in any measured test. The RX 6600 LE’s advantage here likely stems from its higher clock speeds — a 1626 MHz base and 2495 MHz boost versus the Tesla T4’s 585 MHz base and 1590 MHz boost — though the data does not explicitly attribute causation.

The Vulkan test tells a different story. The RX 6600 LE scores 72,428, while the Tesla T4 trails at 72,190. The delta is just 0.3%, which is within the margin of run-to-run variance for most benchmark suites. In practical terms, these two cards deliver nearly identical Vulkan performance, despite the RX 6600 LE’s higher average benchmark score overall.

Looking at the broader context, the RX 6600 LE’s nearest rivals include the NVIDIA Quadro P6000 at 69,986 (1.2% lower) and the AMD Radeon Pro WX 8200 at 69,870 (1.4% lower). The Tesla T4’s nearest rivals include the AMD Radeon VII at 66,004 (1.1% higher) and the NVIDIA Tesla P40 at 65,095 (2.5% higher). Notably, the Tesla T4 is 2.7% behind the AMD Radeon Instinct MI25 and 3% behind the Intel Arc A770, indicating it sits at the lower end of its competitive cluster. The RX 6600 LE, by contrast, sits within 1.3% of its nearest rival, the AMD Radeon RX 6650M, showing tighter competition at its performance tier.

The win count is unambiguous: the RX 6600 LE takes 2 wins, and the Tesla T4 takes 0. Yet the Vulkan result undermines any claim of dominance. A 0.3% spread is effectively parity, so the real story is a single large OpenCL win for AMD and a near-tie in Vulkan.

Specification Differences

The two cards diverge sharply on nearly every specification that matters. The AMD Radeon RX 6600 LE is built on a 7 nm process at TSMC, while the NVIDIA Tesla T4 uses a 12 nm process, also at TSMC. The RX 6600 LE packs 11,060 million transistors into a 237 mm² die, yielding a transistor density of 46.7M per mm². The Tesla T4 has 13,600 million transistors on a much larger 545 mm² die, giving a density of just 25.0M per mm².

Clock speeds favor AMD heavily. The RX 6600 LE runs at a 1626 MHz base and 2495 MHz boost, with a game clock of 2045 MHz. The Tesla T4 idles at a 585 MHz base and boosts to 1590 MHz, with no game clock listed. Memory clocks also differ: the RX 6600 LE’s memory runs at 1750 MHz (14 Gbps effective), while the Tesla T4’s memory runs at 1250 MHz (10 Gbps effective).

Memory configuration is where the Tesla T4 takes the lead. It has 16 GB of GDDR6 on a 256-bit bus, delivering 320.0 GB/s bandwidth. The RX 6600 LE has 8 GB of GDDR6 on a 128-bit bus, delivering 224.0 GB/s. Despite having half the memory bus width, the RX 6600 LE achieves higher pixel rate (159.7 GPixel/s vs 101.8 GPixel/s) and slightly higher texture rate (279.4 GTexel/s vs 254.4 GTexel/s).

Compute unit counts also differ. The RX 6600 LE has 1792 shading units, 112 TMUs, 64 ROPs, and 28 ray tracing cores. The Tesla T4 has 2560 shading units, 160 TMUs, 64 ROPs, 40 ray tracing cores, and 320 tensor cores. In raw FP32 throughput, the RX 6600 LE edges ahead at 8.942 TFLOPS versus 8.141 TFLOPS for the Tesla T4. FP16 follows the same pattern: 17.88 TFLOPS for AMD versus 16.28 TFLOPS for NVIDIA.

Physical and power characteristics differ as well. The RX 6600 LE has a 132 W TDP, requires a dual-slot footprint with a 1x 8-pin power connector, and suggests a 300 W PSU. The Tesla T4 has a 70 W TDP, is single-slot, requires no power connectors, and suggests a 250 W PSU. The RX 6600 LE uses PCIe 4.0 x8; the Tesla T4 uses PCIe 3.0 x16. The RX 6600 LE has display outputs (1x HDMI 2.1, 3x DisplayPort 1.4a); the Tesla T4 has none. The RX 6600 LE measures 190 mm by 110 mm by 40 mm; the Tesla T4 is 168 mm long with no listed height or width.

Architecture Differences

The AMD Radeon RX 6600 LE is based on the Navi 23 chip under the RDNA 2.0 architecture, part of the Navi II (RX 6000) generation. The NVIDIA Tesla T4 uses the TU104 chip under the Turing architecture, part of the Tesla Turing (Txx) generation. The process node difference is substantial: 7 nm for AMD versus 12 nm for NVIDIA, both fabricated at TSMC.

Transistor density tells a story of design philosophy. The RX 6600 LE achieves 46.7M transistors per mm², a figure that reflects the denser 7 nm process. The Tesla T4’s 25.0M per mm² is typical of the older 12 nm node. Despite this, the Tesla T4 has more total transistors (13,600 million vs 11,060 million) due to its physically larger die.

Ray tracing cores exist on both cards — 28 on the RX 6600 LE and 40 on the Tesla T4 — but tensor cores are exclusive to NVIDIA. The Tesla T4’s 320 tensor cores are its defining architectural feature, enabling workloads that the AMD card cannot accelerate. Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical.

The production statuses differ: the RX 6600 LE is listed as Active, while the Tesla T4 is End-of-life. The release dates also diverge significantly, with the RX 6600 LE launching later than the Tesla T4. The predecessor and successor designations also differ: the RX 6600 LE follows Navi and precedes Navi III, while the Tesla T4 follows Tesla Volta and precedes Server Ampere.

Where Each One Wins

The AMD Radeon RX 6600 LE wins in raw compute benchmarks. It takes the OpenCL test by 13% and the Vulkan test by 0.3%, giving it a 2-0 head-to-head record. Its higher FP32 throughput (8.942 TFLOPS vs 8.141 TFLOPS) and faster clock speeds support its benchmark advantage. For general-purpose GPU compute, gaming, or any workload that relies on traditional shader performance, the RX 6600 LE is the clear choice based on the data.

The NVIDIA Tesla T4 wins in memory capacity and bandwidth. Its 16 GB of GDDR6 memory is double the RX 6600 LE’s 8 GB, and its 320.0 GB/s bandwidth is 43% higher than the 224.0 GB/s of the AMD card. For workloads that require large datasets to reside in GPU memory — such as inference with large models or data processing — the Tesla T4 is the only viable option between the two. Its 320 tensor cores add a capability that the RX 6600 LE simply does not have, which is a categorical advantage for tensor-based workloads.

Power efficiency is another Tesla T4 strength. Its 70 W TDP is roughly half the RX 6600 LE’s 132 W, and it requires no external power connectors, making it easier to deploy in power-constrained environments. The single-slot design further aids density in server chassis.

The RX 6600 LE’s pixel rate (159.7 GPixel/s vs 101.8 GPixel/s) and texture rate (279.4 GTexel/s vs 254.4 GTexel/s) indicate better rasterization performance, which aligns with its benchmark wins. The Tesla T4’s higher shading unit count (2560 vs 1792) and TMU count (160 vs 112) do not translate into benchmark victories, suggesting that clock speed differences outweigh core count advantages in these tests.

In summary: choose the RX 6600 LE for compute performance and benchmark wins; choose the Tesla T4 for memory capacity, tensor cores, and power efficiency. The data does not support a single winner across all categories.