AMD Radeon RX 6600S vs NVIDIA Quadro M2000M Comparison

The AMD Radeon RX 6600S and NVIDIA Quadro M2000M represent two distinct eras of mobile graphics, separated by nearly seven years of architectural evolution. The data reveals a stark performance gulf, with the RX 6600S delivering a decisive victory in the single shared benchmark. In the Geekbench OpenCL test, the AMD part scores 66,435, while the Quadro M2000M manages only 10,057. This translates to a 560.6% deltaPct, meaning the RX 6600S is roughly 6.6 times faster in this compute workload. The head-to-head record is 1 win for AMD and 0 for NVIDIA, leaving no ambiguity about which GPU dominates in raw computational throughput.

Head-to-Head Benchmarks

The only directly comparable data point is the Geekbench OpenCL benchmark, and it is not close. The RX 6600S posts 66,435, a figure that places it far outside the Quadro M2000M's reach. The M2000M's 10,057 score is typical of a mid-range mobile GPU from its generation, but it is dwarfed by the modern RDNA 2 architecture. The 560.6% deltaPct is not a marginal improvement; it is a generational leap. In practical terms, any OpenCL-accelerated workload—whether machine learning inference, video encoding, or scientific simulation—will complete dramatically faster on the AMD part.

Interestingly, the RX 6600S's average benchmark score across all tests is 10,629, which is actually lower than its OpenCL result due to other tests like Passmark DirectX 9 (176) and DirectX 10 (81) pulling the average down. The M2000M, despite having only two benchmark entries, maintains an average of 9,832. This discrepancy highlights that while the AMD part excels at compute, its DirectX legacy performance is oddly weak relative to its modern architecture. The M2000M has no DirectX scores in the pack, so its wins are limited to the Vulkan test (9,606), which the RX 6600S lacks data for.

The nearest rivals for the RX 6600S include the AMD Radeon R9 M275X (avg 10,582, deltaPct 0.4%) and the NVIDIA GeForce GTX 560 Ti (avg 10,690, deltaPct -0.6%). These deltas show the RX 6600S is essentially tied with decade-old desktop parts in aggregate scoring, despite its massive OpenCL lead. For the M2000M, its closest competitor is the NVIDIA Quadro 6000 (avg 9,846, deltaPct -0.1%), indicating it sits right at the 47th percentile of all GPUs. The RX 6600S, at the 49th percentile, is only two percentage points higher in global standing, which suggests that while it wins the compute test decisively, its overall benchmark profile is not uniformly superior.

Architecture Differences

The architectural gulf between these two is profound. The RX 6600S uses the Navi 23 chip built on RDNA 2.0, fabricated at 7 nm by TSMC. This process packs 11,060 million transistors into a 237 mm² die, yielding a transistor density of 46.7M per mm². The M2000M, in contrast, uses the GM107 chip on the Maxwell architecture, fabbed at 28 nm. It contains just 1,870 million transistors on a 148 mm² die, with a density of 12.6M per mm². The RX 6600S has nearly six times the transistor count and over three times the density, explaining its computational superiority.

Clock speeds tell a similar story. The RX 6600S runs at a base of 1700 MHz and boosts to 2000 MHz, with a game clock of 1881 MHz. The M2000M's base is 1098 MHz, boosting to only 1137 MHz. Memory also diverges drastically: the AMD part uses 4 GB of GDDR6 at 1750 MHz (14 Gbps effective), delivering 224.0 GB/s bandwidth. The NVIDIA part has 4 GB of GDDR5 at 1253 MHz (5 Gbps effective), yielding just 80.19 GB/s. That is a 179% bandwidth advantage for the RX 6600S. The shading units count 1792 vs 640, TMUs 112 vs 40, and ROPs 64 vs 16. The RX 6600S also features 28 ray tracing cores, which the M2000M lacks entirely.

The feature set reflects their eras. The RX 6600S supports DirectX 12 Ultimate (12_2), while the M2000M is limited to DirectX 12 (11_0). Both support OpenGL 4.6 and Vulkan 1.4, but the AMD part's modern instruction set and hardware ray tracing make it far more future-proof. The TDP also differs: 80 W for the RX 6600S versus 55 W for the M2000M, meaning the AMD chip consumes more power but delivers disproportionately more performance per watt. The M2000M uses an MXM-A (3.0) bus interface, while the RX 6600S uses PCIe 4.0 x8, making the latter far more flexible for modern laptops.

FAQ

Q: Which GPU has the higher memory bandwidth, and by how much?

A: The AMD Radeon RX 6600S offers 224.0 GB/s, which is 179% higher than the NVIDIA Quadro M2000M's 80.19 GB/s. This is due to the GDDR6 memory at 14 Gbps effective versus GDDR5 at 5 Gbps effective.

Q: Does the Quadro M2000M have any benchmark where it wins?

A: The data shows zero head-to-head wins for the M2000M. The only shared test (Geekbench OpenCL) is won by the RX 6600S with a 560.6% deltaPct. The M2000M does have a Geekbench Vulkan score of 9,606, but the RX 6600S has no corresponding Vulkan result to compare against.

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

A: The RX 6600S has a transistor density of 46.7M per mm², while the M2000M has 12.6M per mm². This is a 3.7x difference, reflecting the 7 nm process versus the older 28 nm node.

Q: Are both GPUs still in production?

A: No. Both are marked as "End-of-life" in the production status field. The RX 6600S was released in January 2022, while the M2000M came out in December 2015.

Q: Which GPU has more shading units?

A: The RX 6600S has 1,792 shading units, compared to the M2000M's 640. This is a 2.8x increase in raw shader count, which directly drives its higher FP32 performance of 7.168 TFLOPS versus 1,455.4 GFLOPS.

Q: Do both GPUs support ray tracing?

A: No. The RX 6600S includes 28 ray tracing cores, while the M2000M has no ray tracing cores listed. This makes the AMD part compatible with DirectX 12 Ultimate features that the NVIDIA Maxwell chip cannot handle.

The Verdict

The data unequivocally favors the AMD Radeon RX 6600S for any compute-heavy workload. Its 560.6% lead in OpenCL performance, combined with 7.168 TFLOPS of FP32 throughput versus 1,455.4 GFLOPS, makes it the only choice for tasks like rendering, simulation, or machine learning. The 224.0 GB/s memory bandwidth is nearly three times the M2000M's, which is critical for texture-heavy applications. The RX 6600S also supports ray tracing, a feature absent from the older Maxwell architecture, making it viable for modern game engines and future-proofing.

However, the M2000M is not without merit. Its 55 W TDP is 25 W lower than the RX 6600S's 80 W, making it more suitable for ultra-thin laptops with limited cooling. Its MXM-A (3.0) form factor allows for modular upgrades in workstations, whereas the RX 6600S is an IGP (integrated graphics processor) with a "Portable Device Dependent" display output, meaning it is soldered to the motherboard. The M2000M also has a higher average benchmark score relative to its nearest rivals (9,832 vs 9,846 for the Quadro 6000, a 0.1% deltaPct), showing it performs consistently within its class. For a legacy workstation running older OpenGL applications, the M2000M's stability and driver maturity could be preferable.

The percentile rankings are surprisingly close: the RX 6600S sits at the 49th percentile of all GPUs, while the M2000M is at the 47th. This suggests that while the AMD part wins the compute test, its overall benchmark suite (including weak DirectX 9 and 10 scores) pulls it down to near-parity. The user must decide: do they prioritize raw compute (RX 6600S) or a balance of low power and modularity (M2000M)? The data leans heavily toward the RX 6600S for performance, but the M2000M's efficiency cannot be dismissed.

Specification Differences

The two GPUs differ in nearly every measurable specification. The process node is 7 nm for the RX 6600S versus 28 nm for the M2000M. Transistor count is 11,060 million versus 1,870 million, and die size is 237 mm² versus 148 mm². Base clocks are 1700 MHz versus 1098 MHz, with boost clocks of 2000 MHz versus 1137 MHz. Memory type is GDDR6 versus GDDR5, with bandwidth of 224.0 GB/s versus 80.19 GB/s. Shading units are 1,792 versus 640, TMUs are 112 versus 40, and ROPs are 64 versus 16. The RX 6600S has 28 ray tracing cores; the M2000M has none. FP32 performance is 7.168 TFLOPS versus 1,455.4 GFLOPS, and the RX 6600S supports FP16 at 14.34 TFLOPS while the M2000M has no FP16 data. TDP is 80 W versus 55 W. The bus interface is PCIe 4.0 x8 versus MXM-A (3.0). DirectX support is 12 Ultimate (12_2) versus 12 (11_0). Finally, the RX 6600S has a pixel rate of 128.0 GPixel/s versus 18.19 GPixel/s, and a texture rate of 224.0 GTexel/s versus 45.48 GTexel/s.

Where Each One Wins

The RX 6600S wins decisively in compute and modern workloads. Its OpenCL score of 66,435 dwarfs the M2000M's 10,057, making it superior for general-purpose GPU computing. The 7.168 TFLOPS FP32 throughput is essential for scientific computing, and the 224.0 GB/s bandwidth handles large datasets efficiently. The ray tracing cores enable hardware-accelerated ray tracing in supported games, a feature completely absent on the M2000M. The DirectX 12 Ultimate support ensures compatibility with the latest game engines, while the M2000M is capped at DirectX 12 (11_0), which may cause issues with newer titles. For any user running modern software, the RX 6600S is the clear winner.

The M2000M wins on efficiency and integration. Its 55 W TDP is 31% lower than the RX 6600S's 80 W, which is critical for battery life in mobile workstations. The MXM-A (3.0) form factor allows for field-replaceable upgrades, whereas the RX 6600S is an IGP with no modularity. The M2000M's Geekbench Vulkan score of 9,606 suggests it handles Vulkan APIs adequately, even if the RX 6600S has no comparable data. For legacy applications that rely on older OpenGL or DirectX versions, the M2000M's mature drivers and lower power draw might be preferable. The M2000M's nearest rival, the Quadro 6000, scores nearly identically (9,846 vs 9,832, a 0.1% deltaPct), indicating that it sits comfortably in its performance class without the power penalty of the AMD part. In a workstation where battery life and upgradeability trump raw speed, the M2000M is the more practical choice.