AMD Radeon RX 6600 XT vs NVIDIA P106-100 Comparison

# AMD Radeon RX 6600 XT vs NVIDIA P106-100

The AMD Radeon RX 6600 XT and NVIDIA P106-100 occupy different corners of the GPU landscape. The RX 6600 XT is a retail gaming card built on RDNA 2.0, while the P106-100 is a mining-oriented product from the Pascal generation with no display outputs. Benchmark data shows the RX 6600 XT winning every head-to-head test by a wide margin, yet the P106-100 still holds a 68th percentile ranking among all GPUs, indicating it remains a capable compute-oriented part. The average benchmark score of 24,442 for the RX 6600 XT versus 23,249 for the P106-100 reflects a 5.1% overall gap, but the individual test deltas reveal far larger performance differences in specific workloads.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The AMD Radeon RX 6600 XT has an average benchmark score of 24,442, while the NVIDIA P106-100 scores 23,249. This places the RX 6600 XT in the 70th percentile of all GPUs, versus the 68th percentile for the P106-100.

Q: How do the two cards compare in the 3DMark Steel Nomad DX12 test?

A: The RX 6600 XT scores 1,804 points in 3DMark Steel Nomad DX12, which is 100.7% higher than the P106-100's score of 899. This represents the largest single-test victory for the AMD card among the three shared benchmarks.

Q: What is the memory configuration difference between the two?

A: The RX 6600 XT has 8 GB of GDDR6 memory on a 128-bit bus with 256.0 GB/s bandwidth. The P106-100 has 6 GB of GDDR5 memory on a 192-bit bus with 192.2 GB/s bandwidth.

Q: Does the P106-100 support display outputs?

A: No. The NVIDIA P106-100 has "No outputs" listed in its display outputs field, making it unsuitable for standard desktop use without a secondary graphics solution.

Q: Which card has the higher FP32 compute throughput?

A: The RX 6600 XT delivers 10.60 TFLOPS of FP32 performance, which is more than double the P106-100's 4.375 TFLOPS. The P106-100's FP16 throughput is 68.36 GFLOPS (1:64 ratio), while the RX 6600 XT achieves 21.21 TFLOPS (2:1 ratio).

Q: What are the transistor counts on each chip?

A: The RX 6600 XT's Navi 23 chip contains 11,060 million transistors on a 237 mm² die, while the P106-100's GP106 chip has 4,400 million transistors on a 200 mm² die.

Architecture Differences

The two GPUs come from fundamentally different architectural generations. The RX 6600 XT uses the Navi 23 chip built on RDNA 2.0 architecture, fabricated on TSMC's 7 nm process. The P106-100 uses the GP106 chip with NVIDIA's older Pascal architecture, also from TSMC but on a 16 nm process. This process gap is immediately visible in transistor density: the RX 6600 XT packs 46.7 million transistors per square millimeter, while the P106-100 achieves only 22.0 million per square millimeter.

The RX 6600 XT includes 32 ray tracing cores, a feature entirely absent from the Pascal-based P106-100. The AMD card also has 2,048 shading units, 128 texture mapping units, and 64 raster operation pipelines. The P106-100 counters with 1,280 shading units, 80 TMUs, and 48 ROPs. Neither card includes tensor cores.

The memory subsystems reflect their different design goals. The RX 6600 XT uses 8 GB of GDDR6 running at 16 Gbps effective, producing 256.0 GB/s of bandwidth across a 128-bit interface. The P106-100 uses 6 GB of GDDR5 at 8 Gbps effective, with 192.2 GB/s across a wider 192-bit bus. The AMD card's newer memory technology delivers more bandwidth despite the narrower bus.

API support also differs. The RX 6600 XT supports DirectX 12 Ultimate (12_2), while the P106-100 supports only DirectX 12 (12_1). Both cards support OpenGL 4.6 and Vulkan 1.4. The RX 6600 XT's feature set aligns with modern gaming requirements, including hardware ray tracing and variable rate shading capabilities inherent to RDNA 2.0.

Head-to-Head Benchmarks

The shared benchmark suite consists of three tests: 3DMark Steel Nomad DX12, Geekbench OpenCL, and Geekbench Vulkan. Across all three, the AMD Radeon RX 6600 XT emerges victorious, winning 3 out of 3 head-to-head comparisons.

The 3DMark Steel Nomad DX12 test shows the most dramatic separation. The RX 6600 XT scores 1,804, while the P106-100 manages only 899. This represents a 100.7% advantage for the AMD card, meaning it more than doubles the NVIDIA part's performance in this DirectX 12 workload. This test likely stresses modern rendering features where RDNA 2.0's architectural advantages, including its dedicated ray tracing hardware, become significant.

In Geekbench OpenCL, the RX 6600 XT achieves 80,503 points against the P106-100's 35,951 points. The delta of 123.9% is the largest percentage margin of any test. This compute-heavy benchmark rewards the RX 6600 XT's higher FP32 throughput (10.60 TFLOPS versus 4.375 TFLOPS) and its superior memory bandwidth (256.0 GB/s versus 192.2 GB/s).

The Geekbench Vulkan test narrows the gap slightly but still favors the AMD card decisively. The RX 6600 XT scores 72,417, while the P106-100 scores 32,897, a 120.1% difference. Vulkan performance depends heavily on driver efficiency and hardware scheduling, and the data indicates RDNA 2.0 handles this low-level API substantially better than Pascal.

These results align with the average benchmark scores. The RX 6600 XT's average of 24,442 puts it 0.7% ahead of the NVIDIA GeForce GTX 1630 and 1.1% ahead of the RTX 2080 SUPER among its nearest rivals. The P106-100's average of 23,249 places it essentially tied with the AMD Radeon Pro Vega 16, which scores 23,250 with a 0% delta.

Specification Differences

The most significant specification differences between the two cards are as follows:

• Process Node: RX 6600 XT uses 7 nm; P106-100 uses 16 nm
• Transistors: RX 6600 XT has 11,060 million; P106-100 has 4,400 million
• Die Size: RX 6600 XT measures 237 mm²; P106-100 measures 200 mm²
• Transistor Density: RX 6600 XT achieves 46.7M / mm²; P106-100 achieves 22.0M / mm²
• Base Clock: RX 6600 XT runs at 1968 MHz; P106-100 at 1506 MHz
• Boost Clock: RX 6600 XT boosts to 2589 MHz; P106-100 to 1709 MHz
• Memory Speed: RX 6600 XT uses 16 Gbps effective; P106-100 uses 8 Gbps effective
• Memory Size: RX 6600 XT has 8 GB; P106-100 has 6 GB
• Memory Type: RX 6600 XT uses GDDR6; P106-100 uses GDDR5
• Memory Bus: RX 6600 XT uses 128-bit; P106-100 uses 192-bit
• Memory Bandwidth: RX 6600 XT delivers 256.0 GB/s; P106-100 delivers 192.2 GB/s
• Shading Units: RX 6600 XT has 2,048; P106-100 has 1,280
• TMUs: RX 6600 XT has 128; P106-100 has 80
• ROPs: RX 6600 XT has 64; P106-100 has 48
• RT Cores: RX 6600 XT has 32; P106-100 has none
• Pixel Rate: RX 6600 XT achieves 165.7 GPixel/s; P106-100 achieves 82.03 GPixel/s
• Texture Rate: RX 6600 XT achieves 331.4 GTexel/s; P106-100 achieves 136.7 GTexel/s
• FP32: RX 6600 XT delivers 10.60 TFLOPS; P106-100 delivers 4.375 TFLOPS
• FP16: RX 6600 XT delivers 21.21 TFLOPS (2:1); P106-100 delivers 68.36 GFLOPS (1:64)
• TDP: RX 6600 XT rated at 160 W; P106-100 rated at 120 W
• Power Connectors: RX 6600 XT uses 1x 8-pin; P106-100 uses 1x 6-pin
• Suggested PSU: RX 6600 XT recommends 450 W; P106-100 recommends 300 W
• Bus Interface: RX 6600 XT uses PCIe 4.0 x8; P106-100 uses PCIe 1.0 x16
• Display Outputs: RX 6600 XT has 1x HDMI 2.1 and 3x DisplayPort 1.4a; P106-100 has no outputs
• DirectX Support: RX 6600 XT supports 12 Ultimate (12_2); P106-100 supports 12 (12_1)
• Dimensions: RX 6600 XT is 190 mm long; P106-100 is 250 mm long
• Release Date: RX 6600 XT launched 2021-07-29; P106-100 launched 2017-06-18

Where Each One Wins

The AMD Radeon RX 6600 XT wins decisively across all measured benchmarks, but the nature of its victories points to specific use cases. Its 100.7% advantage in 3DMark Steel Nomad DX12 indicates strong performance in modern DirectX 12 gaming workloads, particularly those leveraging ray tracing and other RDNA 2.0 features. The 123.9% lead in Geekbench OpenCL and 120.1% lead in Vulkan confirm that the RX 6600 XT is also superior for compute-heavy applications such as rendering, machine learning inference, and general-purpose GPU computing. Its 8 GB of GDDR6 memory and 256.0 GB/s bandwidth provide ample capacity and throughput for 1080p and 1440p gaming with high texture settings.

The NVIDIA P106-100, despite losing every head-to-head test, retains relevance in specific scenarios. Its 68th percentile ranking indicates it outperforms roughly two-thirds of all GPUs in the database. The card's 120 W TDP and 300 W suggested PSU requirement make it a low-power option for compute tasks that do not require display output. Its 192-bit memory bus and 6 GB GDDR5 configuration, while slower in aggregate bandwidth, offer reasonable capacity for workloads that fit within its memory pool. The P106-100's lack of display outputs means it is strictly a secondary compute accelerator, suitable for mining or headless rendering farms where the RX 6600 XT's display capabilities would go unused.

The Verdict

The benchmark data is unambiguous: the AMD Radeon RX 6600 XT outperforms the NVIDIA P106-100 in every shared test by margins ranging from 100.7% to 123.9%. For any user building a system that requires gaming, content creation, or general-purpose GPU compute with display output, the RX 6600 XT is the clear choice. Its 32 ray tracing cores, DirectX 12 Ultimate support, and 10.60 TFLOPS of FP32 throughput position it as a modern, capable graphics solution. The 70th percentile ranking confirms it sits above the majority of GPUs in the database, and its launch MSRP of 379 USD places it in the mid-range segment.

The P106-100 serves a narrow but legitimate purpose. As a mining GPU with no display outputs, it is designed for installations where video output is handled by another device. Its 68th percentile ranking and average score of 23,249 show it remains competitive with modern entry-level parts, but its 4.375 TFLOPS FP32 throughput and lack of ray tracing hardware limit its utility in contemporary workloads. Users with existing P106-100 cards can still extract value from them in compute-oriented tasks, but anyone choosing between these two cards for a new build should select the RX 6600 XT based on the measured performance data. The 5.1% average score gap understates the true difference in modern workloads, where the RX 6600 XT's architectural advantages become pronounced.