AMD Radeon RX 6600 vs NVIDIA Tesla M4 Comparison

Head-to-Head Benchmarks

The only directly comparable benchmark in the database is Geekbench OpenCL, and the result is decisive. The AMD Radeon RX 6600 scores 28,850 points, while the NVIDIA Tesla M4 manages 16,932 points. That is a 70.4% advantage for the AMD part in raw compute throughput. The gap is substantial enough that the Tesla M4 cannot be considered a competitor in any workload that relies on OpenCL compute performance.

Looking at the broader database context, the RX 6600's average benchmark score of 19,036 places it in the 63rd percentile of all GPUs tracked. Its nearest rivals include the NVIDIA Quadro K6000 (19,030, a 0% delta), the GeForce RTX 4050 Mobile (19,049, -0.1%), and the Tesla K20m (19,089, -0.3%). The RX 6600 essentially trades blows with those cards, sitting within a fraction of a percentage point of each. The RTX 2000 Ada Generation trails slightly at 18,954, which is a 0.4% deficit relative to the AMD card.

The Tesla M4, by contrast, records an average score of 16,932, putting it in the 60th percentile of all GPUs. Its nearest rivals are the AMD Radeon HD 7970M (17,019, -0.5%), the NVIDIA GeForce GTX 690 (17,037, -0.6%), and the NVIDIA T400 4 GB (16,792, 0.8%). The RX 7600 XT sits just ahead at 17,083, a -0.9% delta relative to the M4. The M4's compute showing is roughly in line with those older or lower-tier cards, but it is nowhere near the RX 6600.

In the head-to-head table, the RX 6600 wins the sole benchmark, 1 win to 0 for the Tesla M4. The database records no other directly comparable tests, so the verdict on performance rests entirely on this OpenCL result. That single data point, however, is unambiguous: the RX 6600 delivers more than 70% higher OpenCL throughput than the M4.

Architecture Differences

The two cards come from different architectural eras, and the specifications reflect that divide. The AMD Radeon RX 6600 uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated on a 7 nm TSMC process. It packs 11,060 million transistors into a 237 mm² die, yielding a transistor density of 46.7 million per square millimeter. The NVIDIA Tesla M4 uses the GM206 chip on Maxwell 2.0 architecture, built on a 28 nm TSMC process. It contains 2,940 million transistors on a 228 mm² die, with a density of just 12.9 million per square millimeter. The process node advantage is stark: 7 nm versus 28 nm, which explains the massive transistor count disparity despite nearly identical die sizes.

Clock speeds also diverge sharply. The RX 6600 runs at a base clock of 1626 MHz, a boost clock of 2491 MHz, and a game clock of 2044 MHz. The Tesla M4 operates at a base of 872 MHz and a boost of 1072 MHz. Even at base, the AMD chip runs nearly 90% faster than the M4's boost. Memory clocks differ as well: the RX 6600 uses 1750 MHz memory with 14 Gbps effective data rate, while the M4 runs at 1375 MHz with 5.5 Gbps effective. The memory configuration is another differentiator. The RX 6600 has 8 GB of GDDR6 on a 128-bit bus, delivering 224.0 GB/s of bandwidth. The Tesla M4 has 4 GB of GDDR5 on a 128-bit bus, providing 88.00 GB/s. The RX 6600 offers double the capacity and more than 2.5 times the bandwidth.

Compute resources are heavily weighted toward the AMD card. The RX 6600 has 1792 shading units, 112 texture mapping units, 64 render output units, and 28 ray tracing cores. The Tesla M4 has 1024 shading units, 64 TMUs, and 32 ROPs, with no ray tracing cores. The pixel rate tells the story: 159.4 GPixel/s for the RX 6600 versus 34.30 GPixel/s for the M4. Texture rate is 279.0 GTexel/s versus 68.61 GTexel/s. FP32 throughput is 8.928 TFLOPS versus 2.195 TFLOPS. The RX 6600 also supports FP16 at 17.86 TFLOPS with a 2:1 ratio, while the M4 has no recorded FP16 capability.

Interface and power characteristics also differ. The RX 6600 uses PCIe 4.0 x8, while the M4 uses PCIe 3.0 x16. The RX 6600 has a TDP of 132 W and requires a 300 W suggested PSU with a single 8-pin connector. The Tesla M4 has a TDP of just 50 W and a suggested PSU of 250 W, with no power connectors listed. The M4 is a single-slot card with no display outputs, reflecting its server-oriented design. The RX 6600 is dual-slot, with 1x HDMI 2.1 and 3x DisplayPort 1.4a outputs, making it a consumer-facing card.

FAQ

Q: Which card has better OpenCL performance?

A: The AMD Radeon RX 6600 scores 28,850 in Geekbench OpenCL, while the NVIDIA Tesla M4 scores 16,932. That is a 70.4% advantage for the RX 6600.

Q: How do the memory configurations compare?

A: The RX 6600 has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. The Tesla M4 has 4 GB of GDDR5 on a 128-bit bus with 88.00 GB/s bandwidth.

Q: What is the transistor density difference?

A: The RX 6600 uses a 7 nm process with 46.7 million transistors per square millimeter. The Tesla M4 uses a 28 nm process with 12.9 million per square millimeter.

Q: Does the Tesla M4 support ray tracing?

A: No. The Tesla M4 has no ray tracing cores. The RX 6600 has 28 ray tracing cores.

Q: Which card has higher clock speeds?

A: The RX 6600 has a base clock of 1626 MHz and a boost of 2491 MHz. The Tesla M4 has a base of 872 MHz and a boost of 1072 MHz.

Q: What are the power requirements?

A: The RX 6600 has a TDP of 132 W and a suggested PSU of 300 W. The Tesla M4 has a TDP of 50 W and a suggested PSU of 250 W.

The Verdict

The database data is clear: the AMD Radeon RX 6600 is the superior performer for any task that benefits from OpenCL compute. Its 70.4% lead in the head-to-head benchmark, combined with a higher average benchmark score (19,036 versus 16,932) and a better percentile ranking (63rd versus 60th), makes it the stronger card on raw performance. The RX 6600 also offers 8 GB of memory versus 4 GB, higher bandwidth, faster clocks, and more compute units. It is a modern RDNA 2.0 part with ray tracing support and display outputs, suitable for gaming and general-purpose compute.

The NVIDIA Tesla M4, however, has its own niche. It is a single-slot card with a 50 W TDP and no power connectors, making it suitable for dense server deployments where space and power are constrained. It has no display outputs, indicating it is designed purely for compute tasks in a headless environment. Its 4 GB of GDDR5 and 88.00 GB/s bandwidth are modest, but its low power draw and compact form factor are genuine advantages in specific data center scenarios. The RX 6600, at 132 W and dual-slot, cannot match that efficiency profile.

The choice comes down to workload and environment. For a user who needs a card with display outputs, modern API support, and substantial compute throughput, the RX 6600 is the obvious pick. For a deployment that requires a low-power, single-slot accelerator without video output, the Tesla M4 fits that bill, though its performance is far below the RX 6600. The data does not support the M4 as a performance alternative; it is a specialized piece of hardware for a narrow use case.

Specification Differences

The two cards differ across nearly every measurable specification. The RX 6600 uses a 7 nm process with 11,060 million transistors and a 237 mm² die. The Tesla M4 uses a 28 nm process with 2,940 million transistors and a 228 mm² die. Transistor density is 46.7M per mm² for the RX 6600 versus 12.9M per mm² for the M4.

Clock speeds: the RX 6600 has a base of 1626 MHz and a boost of 2491 MHz, with a game clock of 2044 MHz. The M4 has a base of 872 MHz and a boost of 1072 MHz, with no game clock listed. Memory clocks are 1750 MHz (14 Gbps effective) for the RX 6600 and 1375 MHz (5.5 Gbps effective) for the M4.

Memory: the RX 6600 has 8 GB of GDDR6 on a 128-bit bus with 224.0 GB/s bandwidth. The M4 has 4 GB of GDDR5 on a 128-bit bus with 88.00 GB/s bandwidth.

Compute units: the RX 6600 has 1792 shading units, 112 TMUs, 64 ROPs, and 28 RT cores. The M4 has 1024 shading units, 64 TMUs, and 32 ROPs, with no RT cores. Pixel rate is 159.4 GPixel/s versus 34.30 GPixel/s. Texture rate is 279.0 GTexel/s versus 68.61 GTexel/s. FP32 is 8.928 TFLOPS versus 2.195 TFLOPS. The RX 6600 has FP16 at 17.86 TFLOPS; the M4 has no FP16 data.

Power and physical: the RX 6600 has a 132 W TDP, is dual-slot, uses one 8-pin connector, and requires a 300 W PSU. The M4 has a 50 W TDP, is single-slot, has no power connectors, and requires a 250 W PSU. The RX 6600 uses PCIe 4.0 x8; the M4 uses PCIe 3.0 x16. Display outputs: the RX 6600 has 1x HDMI 2.1 and 3x DisplayPort 1.4a; the M4 has no outputs. The RX 6600 measures 190 mm in length, 110 mm in height, and 40 mm in width; the M4 has no dimensions recorded. The RX 6600 supports DirectX 12 Ultimate (12_2), while the M4 supports DirectX 12 (12_1). Both support OpenGL 4.6 and Vulkan 1.4.