AMD Radeon RX 6850M XT vs NVIDIA RTX 4000 Ada Generation Comparison

FAQ

Q: Which GPU wins in raw compute performance, and by how much?

A: The NVIDIA RTX 4000 Ada Generation wins both recorded head-to-head benchmarks. In Geekbench OpenCL, it scores 146,593 against AMD's 85,040, a 72.4% advantage. In Geekbench Vulkan, the NVIDIA card leads with 123,842 versus 99,483, a 24.5% margin.

Q: How does the AMD Radeon RX 6850M XT compare to its nearest rivals?

A: The AMD card has an average benchmark score of 78,940. Its closest rival is the NVIDIA Tesla P100 PCIe 12 GB at 79,396, which is 0.6% higher. The RTX 5090 scores 79,842, 1.1% higher, while the RTX 5090 D scores 77,712, which is 1.6% lower than the AMD part.

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

A: The NVIDIA RTX 4000 Ada Generation has 20 GB of GDDR6 on a 160-bit bus, delivering 360.0 GB/s bandwidth. The AMD Radeon RX 6850M XT has 12 GB of GDDR6 on a 192-bit bus, delivering 432.0 GB/s. The AMD card has a narrower capacity but a wider bus and higher bandwidth.

Q: Which GPU has a higher transistor density despite having fewer transistors overall?

A: The NVIDIA RTX 4000 Ada Generation packs 35,800 million transistors into a 294 mm² die, giving a density of 121.8M per mm². The AMD Radeon RX 6850M XT has 17,200 million transistors on a larger 335 mm² die, resulting in only 51.3M per mm². NVIDIA's 5 nm process versus AMD's 7 nm process explains this gap.

Q: What are the power requirements for each card?

A: The NVIDIA RTX 4000 Ada Generation has a 130 W TDP with a single 16-pin power connector and a suggested PSU of 300 W. The AMD Radeon RX 6850M XT has a higher 165 W TDP, uses no external power connectors (it is an integrated GPU for mobile), and has no suggested PSU listed.

Q: Which GPU has a higher percentile ranking among all GPUs?

A: The NVIDIA RTX 4000 Ada Generation sits in the 95th percentile, while the AMD Radeon RX 6850M XT sits in the 92nd percentile. The NVIDIA card's average benchmark score of 135,218 is substantially higher than AMD's 78,940.

Where Each One Wins

The data splits cleanly between workstation-class compute and mobile gaming usability. The NVIDIA RTX 4000 Ada Generation wins both recorded benchmark tests, making it the clear choice for raw compute workloads. Its Geekbench OpenCL score of 146,593 versus 85,040 is a dominant 72.4% lead, which suggests applications relying on OpenCL compute will favor NVIDIA heavily. The Vulkan test also goes to NVIDIA, 123,842 versus 99,483, a 24.5% advantage, meaning even cross-platform graphics APIs show NVIDIA ahead.

The AMD Radeon RX 6850M XT has no benchmark wins in the recorded data, but it does have strengths in other areas. It offers higher memory bandwidth at 432.0 GB/s versus 360.0 GB/s, which could benefit bandwidth-sensitive workloads. Its pixel rate is also higher at 165.2 GPixel/s versus 139.2 GPixel/s, suggesting faster fill-rate operations. The AMD card has a higher boost clock at 2581 MHz versus 2175 MHz, and a higher base clock at 2321 MHz versus 1500 MHz. These specifications indicate that in scenarios not captured by the two recorded benchmarks, such as pure rasterization or memory-throughput-heavy tasks, the AMD part may hold its own.

The NVIDIA card's 20 GB memory capacity is double AMD's 12 GB in practical terms, which matters for large datasets. The AMD card's 12 GB capacity is still substantial but will hit limits sooner in memory-hungry workloads. For users prioritizing compute performance per the recorded data, NVIDIA wins. For users who need maximum memory bandwidth or pixel throughput, AMD has the edge in those specific specifications.

Architecture Differences

The NVIDIA RTX 4000 Ada Generation uses the AD104 chip built on Ada Lovelace architecture, manufactured on a 5 nm process at TSMC. The AMD Radeon RX 6850M XT uses the Navi 22 chip built on RDNA 2.0 architecture, also from TSMC but on a 7 nm process. The process node difference is significant: 5 nm versus 7 nm allows NVIDIA to fit 35,800 million transistors into a smaller 294 mm² die, while AMD fits 17,200 million transistors into a larger 335 mm² die. This results in transistor densities of 121.8M per mm² for NVIDIA and 51.3M per mm² for AMD, a 2.4x density advantage for NVIDIA.

The architectures differ fundamentally in compute unit design. NVIDIA's Ada Lovelace has 6,144 shading units, 192 texture mapping units, 64 render output units, 48 ray tracing cores, and 192 tensor cores. AMD's RDNA 2.0 has 2,560 shading units, 160 TMUs, 64 ROPs, and 40 ray tracing cores, with no tensor cores listed. The shading unit count is nearly 2.4x higher on NVIDIA, which explains its FP32 compute advantage: 26.73 TFLOPS versus 13.21 TFLOPS. Interestingly, FP16 performance is nearly identical: 26.73 TFLOPS for NVIDIA (1:1 ratio) and 26.43 TFLOPS for AMD (2:1 ratio). This means AMD achieves similar half-precision performance with far fewer shading units by using a 2:1 FP16:FP32 ratio.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API compatibility is identical. The NVIDIA card is a single-slot workstation card with four DisplayPort 1.4a outputs, while the AMD card is an integrated GPU for mobile with display outputs described as "Portable Device Dependent." NVIDIA's tensor cores are a major architectural differentiator, enabling AI and machine learning workloads that AMD cannot accelerate through dedicated tensor hardware. The AMD card's ray tracing cores number 40 versus NVIDIA's 48, a modest difference given NVIDIA's higher overall compute throughput.

Specification Differences

The two cards differ across nearly every major specification category. The NVIDIA RTX 4000 Ada Generation has a base clock of 1500 MHz and boost clock of 2175 MHz, while the AMD Radeon RX 6850M XT has a base clock of 2321 MHz and boost clock of 2581 MHz, with a game clock of 2463 MHz. AMD's clocks are substantially higher, but NVIDIA's architecture compensates with more execution units.

Memory capacity differs: 20 GB on NVIDIA versus 12 GB on AMD. Both use GDDR6 with 18 Gbps effective speed, but bus widths differ at 160-bit versus 192-bit. This produces bandwidth of 360.0 GB/s for NVIDIA and 432.0 GB/s for AMD. The AMD card has a 32-bit wider bus and 72 GB/s more bandwidth.

Compute resources differ sharply: 6,144 shading units on NVIDIA versus 2,560 on AMD; 192 TMUs versus 160; 64 ROPs on both; 48 RT cores versus 40; and 192 tensor cores versus none. Pixel rates are 139.2 GPixel/s on NVIDIA versus 165.2 GPixel/s on AMD. Texture rates are nearly identical: 417.6 GTexel/s versus 413.0 GTexel/s.

Power consumption favors NVIDIA at 130 W TDP versus 165 W TDP. The NVIDIA card is single-slot with a 16-pin power connector and 300 W suggested PSU. The AMD card is an integrated GPU with no power connectors and no suggested PSU. The NVIDIA card measures 245 mm in length and 112 mm in height; AMD has no listed dimensions because it is a mobile IGP.

Release timing differs: NVIDIA launched on 2023-08-08, AMD on 2022-01-03. NVIDIA is still active in production; AMD is end-of-life. NVIDIA's predecessor is Workstation Ampere and successor is Blackwell PRO W. AMD's predecessor is Polaris Mobile with no successor listed. Both use PCIe 4.0 x16.

Head-to-Head Benchmarks

The two recorded benchmarks show a consistent NVIDIA advantage, but the magnitude differs dramatically by test. In Geekbench OpenCL, the NVIDIA RTX 4000 Ada Generation scores 146,593 against the AMD Radeon RX 6850M XT's 85,040. This is a 72.4% delta, the largest gap in any recorded test. OpenCL workloads that scale with shading unit count will heavily favor NVIDIA's 6,144 shading units versus AMD's 2,560.

In Geekbench Vulkan, the gap narrows considerably. NVIDIA scores 123,842 versus AMD's 99,483, a 24.5% delta. Vulkan is a lower-level API that can better utilize AMD's higher clocks and memory bandwidth. AMD's 2581 MHz boost clock and 432.0 GB/s bandwidth help close the gap, but NVIDIA's raw compute resources still prevail.

The wins are 2 for NVIDIA and 0 for AMD in the head-to-head data. This is consistent with the average benchmark scores: NVIDIA averages 135,218 across all recorded tests, while AMD averages 78,940. The NVIDIA card's percentile ranking of 95 versus AMD's 92 also reflects the performance gap, though the percentile difference is smaller than the raw score difference suggests.

Looking at the nearest rivals provides context. NVIDIA's average score of 135,218 is nearly identical to the NVIDIA A10M at 135,230 (0% delta) and only 0.1% below the AMD Radeon PRO W6800 at 135,396. This places the RTX 4000 Ada Generation in a tight cluster of high-end workstation GPUs. AMD's average of 78,940 sits near the NVIDIA Tesla P100 PCIe 12 GB at 79,396 (-0.6%) and the RTX 5090 at 79,842 (-1.1%). The AMD card is 1.6% above the RTX 5090 D at 77,712. The AMD card's rivals are a mix of older data-center GPUs and current consumer cards, while NVIDIA's rivals are all workstation-class products.

The Verdict

The data points to a clear performance hierarchy. The NVIDIA RTX 4000 Ada Generation wins both head-to-head benchmarks, has a higher average score (135,218 versus 78,940), a higher percentile ranking (95 versus 92), and more than double the FP32 compute throughput (26.73 TFLOPS versus 13.21 TFLOPS). For any workload captured by the recorded benchmarks, the NVIDIA card is the superior choice.

The AMD Radeon RX 6850M XT is not without merits, but its strengths lie outside the recorded benchmark data. It offers higher memory bandwidth (432.0 GB/s versus 360.0 GB/s), higher pixel rate (165.2 GPixel/s versus 139.2 GPixel/s), and higher clock speeds across the board. These specifications suggest it could perform competitively in fill-rate-bound or bandwidth-bound scenarios. Its FP16 performance of 26.43 TFLOPS is nearly identical to NVIDIA's 26.73 TFLOPS, making it a viable option for half-precision compute workloads.

The verdict depends on the use case. For professional workstation compute, the NVIDIA RTX 4000 Ada Generation is the clear pick: it wins both benchmarks, has 20 GB of memory, tensor cores for AI workloads, a lower 130 W TDP, and remains in active production. It is also a single-slot card with standard DisplayPort outputs, suitable for workstation integration.

For mobile gaming or portable devices, the AMD Radeon RX 6850M XT is the only option, as it is an integrated GPU. Its end-of-life status and lack of a successor in the data suggest it is a mature product. Its higher bandwidth and pixel rate could benefit gaming scenarios, though the recorded benchmarks do not capture gaming performance directly. Users who need a mobile GPU with strong bandwidth characteristics should consider AMD, but the recorded data favors NVIDIA in every measured test.