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

Head-to-Head Benchmarks

The recorded head-to-head data covers two cross-platform compute tests, and the NVIDIA RTX 4000 SFF Ada Generation wins both. The largest margin appears in Geekbench OpenCL, where the NVIDIA card scores 124,812 against the AMD Radeon RX 6850M XT's 85,040. That is a 46.8% advantage, a substantial gap that reflects the NVIDIA card's higher raw FP32 throughput and its dedicated tensor hardware being leveraged in OpenCL workloads. The AMD part, by contrast, trails by nearly half in this test, which is consistent with its lower FP32 rating of 13.21 TFLOPS compared to 19.17 TFLOPS for the NVIDIA card.

The second test, Geekbench Vulkan, is much closer. NVIDIA scores 109,364 versus AMD's 99,483, a 9.9% lead. This narrower margin suggests that the AMD Radeon RX 6850M XT is more competitive in Vulkan-based rendering tasks, likely due to its higher pixel rate (165.2 GPixel/s versus 99.84 GPixel/s) and texture rate (413.0 GTexel/s versus 299.5 GTexel/s). However, the NVIDIA card still wins outright. The database records 2 wins for the NVIDIA RTX 4000 SFF Ada Generation and 0 for the AMD part in direct comparisons.

When placed against the broader field, the NVIDIA card sits at the 95th percentile among all GPUs, with an average benchmark score of 117,088. Its nearest rivals include the NVIDIA GB10 (delta of -0.3%), the AMD Radeon PRO W7700 (delta of -1.6%), the NVIDIA Tesla V100 SXM2 16 GB (delta of +2.4%), and the NVIDIA RTX A5500 Mobile (delta of +2.8%). These deltas indicate that the RTX 4000 SFF Ada Generation is essentially on par with the GB10 and PRO W7700, while being a few percent ahead of older datacenter and mobile workstation parts.

The AMD Radeon RX 6850M XT, meanwhile, sits at the 92nd percentile, with an average benchmark score of 78,940. Its nearest rivals are the NVIDIA Tesla P100 PCIe 12 GB (delta of -0.6%), the Tesla P100 PCIe 16 GB (delta of -0.8%), the GeForce RTX 5090 (delta of -1.1%), and the GeForce RTX 5090 D (delta of +1.6%). The AMD card's average score is roughly 32% lower than the NVIDIA card's average, which is a notable difference even though both parts are in the top decile of all GPUs.

The data shows a clear overall performance hierarchy: the RTX 4000 SFF Ada Generation is the faster card in compute-heavy synthetic benchmarks, while the RX 6850M XT holds advantages in specific rasterization metrics. The Vulkan result, where AMD trails by only 9.9%, hints that in real-world gaming or graphics workloads the gap could shrink further, but the OpenCL result (46.8% lead for NVIDIA) dominates the aggregate picture.

FAQ

Q: Which card has the higher average benchmark score?

A: The NVIDIA RTX 4000 SFF Ada Generation has an average benchmark score of 117,088, compared to 78,940 for the AMD Radeon RX 6850M XT. The NVIDIA card also ranks at the 95th percentile of all GPUs, while the AMD card ranks at the 92nd.

Q: How large is the difference in the Geekbench Vulkan test?

A: The NVIDIA card scores 109,364, and the AMD card scores 99,483. That is a 9.9% lead for NVIDIA. It is the closest head-to-head result between the two.

Q: What is the biggest margin in any shared benchmark?

A: The Geekbench OpenCL test shows the largest gap: NVIDIA scores 124,812 versus AMD's 85,040, a 46.8% difference in favor of the NVIDIA RTX 4000 SFF Ada Generation.

Q: Does the AMD card have any benchmark where it wins?

A: No. The recorded head-to-head data includes only Geekbench OpenCL and Geekbench Vulkan, and the AMD Radeon RX 6850M XT loses both. The database shows 2 wins for NVIDIA and 0 for AMD.

Q: How do the two cards compare in memory bandwidth?

A: The AMD Radeon RX 6850M XT has a memory bandwidth of 432.0 GB/s, while the NVIDIA RTX 4000 SFF Ada Generation has 280.0 GB/s. AMD's bandwidth is about 54% higher, which helps explain its competitive Vulkan showing despite lower compute scores.

Q: What are the transistor counts and process nodes?

A: The NVIDIA card uses a 5 nm process with 35,800 million transistors on a 294 mm² die. The AMD card uses a 7 nm process with 17,200 million transistors on a 335 mm² die. NVIDIA's transistor density is 121.8 million per mm², versus AMD's 51.3 million per mm².

Architecture Differences

The architectural divide between these two GPUs is substantial. NVIDIA's RTX 4000 SFF Ada Generation is built on the Ada Lovelace architecture using the AD104 chip, fabricated on a 5 nm process at TSMC. It packs 35,800 million transistors into a 294 mm² die, yielding a transistor density of 121.8 million per mm². The AMD Radeon RX 6850M XT, in contrast, uses the RDNA 2.0 architecture with the Navi 22 chip, on a 7 nm process at the same foundry. Its transistor count is 17,200 million, spread across a larger 335 mm² die, giving a density of just 51.3 million per mm².

The NVIDIA card is designed as a workstation part, part of the GeForce 40-series but targeting professional use (the generation is labeled "Workstation Ada"). It includes 48 ray tracing cores and 192 tensor cores, the latter enabling AI-accelerated workloads that the AMD card lacks entirely (its tensor core field is null). The AMD card, from the Radeon RX 6000 series and the Navi Mobile generation, has 40 ray tracing cores but no equivalent tensor hardware. This difference matters for any workload that can use NVIDIA's tensor cores, such as denoising or AI inference, though the database benchmarks do not isolate that specific capability.

Both cards support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, so API-level compatibility is identical. The memory subsystems also diverge: NVIDIA uses a 160-bit bus with 20 GB of GDDR6 at 14 Gbps effective, while AMD uses a 192-bit bus with 12 GB of GDDR6 at 18 Gbps effective. This gives AMD a bandwidth advantage (432.0 GB/s versus 280.0 GB/s) but NVIDIA a capacity advantage (20 GB versus 12 GB). The compute unit counts follow different philosophies: NVIDIA has 6144 shading units, 192 TMUs, and 64 ROPs, while AMD has 2560 shading units, 160 TMUs, and 64 ROPs. NVIDIA's FP32 throughput is 19.17 TFLOPS, and its FP16 is identical at 19.17 TFLOPS (1:1 ratio). AMD's FP32 is 13.21 TFLOPS, but its FP16 is 26.43 TFLOPS (2:1 ratio), meaning AMD offers higher half-precision throughput despite lower single-precision performance.

The power and form-factor situations are starkly different. The NVIDIA card has a 70 W TDP, is dual-slot, and requires no external power connectors, with a suggested PSU of 250 W. It is a compact 168 mm long and 69 mm high, with four mini-DisplayPort 1.4a outputs. The AMD card has a 165 W TDP, is an IGP (integrated graphics processor, meaning it is meant to be mounted on a motherboard or board), and also uses no external power connectors, but its display outputs are listed as "Portable Device Dependent." This positions the NVIDIA card as a drop-in low-profile workstation accelerator, while the AMD card appears designed for mobile or embedded solutions.

Specification Differences

The two cards differ across nearly every core specification. The process node is 5 nm for NVIDIA versus 7 nm for AMD. Transistor count is 35,800 million versus 17,200 million. Die size is 294 mm² versus 335 mm², and transistor density is 121.8M/mm² versus 51.3M/mm². Clock speeds show AMD running much higher: base 2321 MHz versus 720 MHz, boost 2581 MHz versus 1560 MHz, and a game clock of 2463 MHz for AMD (NVIDIA has no game clock). Memory clocks are also higher on AMD at 2250 MHz (18 Gbps effective) versus 1750 MHz (14 Gbps effective).

Memory configuration: NVIDIA offers 20 GB GDDR6 on a 160-bit bus with 280.0 GB/s bandwidth; AMD offers 12 GB GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth. Shading units: 6144 versus 2560. TMUs: 192 versus 160. ROPs are equal at 64. Ray tracing cores: 48 versus 40. Tensor cores: 192 for NVIDIA, none for AMD. Pixel rate: 99.84 GPixel/s versus 165.2 GPixel/s. Texture rate: 299.5 GTexel/s versus 413.0 GTexel/s. FP32: 19.17 TFLOPS versus 13.21 TFLOPS. FP16: 19.17 TFLOPS (1:1) versus 26.43 TFLOPS (2:1). TDP: 70 W versus 165 W. Slot width: Dual-slot versus IGP. Power connectors: None for both. Suggested PSU: 250 W for NVIDIA, none listed for AMD. Bus interface: both PCIe 4.0 x16. Display outputs: 4x mini-DisplayPort 1.4a versus Portable Device Dependent. Dimensions: NVIDIA is 168 mm (6.6 inches) long and 69 mm (2.7 inches) high; AMD has no listed dimensions. Production status: Active versus End-of-life. Release date: 2023-03-20 for NVIDIA versus 2022-01-03 for AMD. Predecessor: Workstation Ampere versus Polaris Mobile. Successor: Blackwell PRO W for NVIDIA, none for AMD.

Where Each One Wins

The NVIDIA RTX 4000 SFF Ada Generation wins on raw compute in the shared benchmarks, particularly OpenCL where it leads by 46.8%. Its strengths are higher FP32 throughput (19.17 TFLOPS versus 13.21 TFLOPS), more shading units (6144 versus 2560), more ray tracing cores (48 versus 40), and the presence of 192 tensor cores. It also has more memory capacity (20 GB versus 12 GB), a smaller die with higher transistor density, a lower TDP (70 W versus 165 W), and an active production status. For workloads that rely on single-precision compute, AI acceleration, or large memory buffers, the NVIDIA card is the clear choice.

The AMD Radeon RX 6850M XT wins on memory bandwidth (432.0 GB/s versus 280.0 GB/s), pixel rate (165.2 GPixel/s versus 99.84 GPixel/s), texture rate (413.0 GTexel/s versus 299.5 GTexel/s), and FP16 throughput (26.43 TFLOPS versus 19.17 TFLOPS). It also has a higher boost clock (2581 MHz versus 1560 MHz) and a wider memory bus (192-bit versus 160-bit). In the Vulkan test, it comes within 9.9% of the NVIDIA card, suggesting that its higher rasterization rates help close the gap in graphics-oriented APIs. For tasks that favor fill-rate, texture-heavy rendering, or half-precision compute, the AMD card has measurable advantages.

The percentile data reinforces this split. NVIDIA sits at the 95th percentile with an average score 32% higher than AMD's, but AMD's 92nd percentile placement means it is still a high-end part. The nearest rival deltas tell a similar story: NVIDIA's closest competitors are other workstation and datacenter parts (GB10, PRO W7700, Tesla V100), while AMD's closest rivals include the Tesla P100 and GeForce RTX 5090. This suggests NVIDIA's card competes in a workstation bracket, whereas AMD's card is closer to enthusiast mobile gaming hardware.

The Verdict

Based strictly on the recorded data, the NVIDIA RTX 4000 SFF Ada Generation is the superior overall performer. It wins both head-to-head benchmarks, has a higher average score (117,088 versus 78,940), ranks higher in the percentile distribution (95th versus 92nd), and offers more memory, more shading units, tensor cores, and a lower TDP. The OpenCL margin of 46.8% is decisive, and even the Vulkan test, where AMD is most competitive, ends with a 9.9% NVIDIA lead. For anyone prioritizing compute performance, AI-capable hardware, or a compact workstation card with a 70 W power envelope, the RTX 4000 SFF Ada Generation is the pick.

The AMD Radeon RX 6850M XT is not without merit, however. Its higher memory bandwidth (432.0 GB/s), pixel rate, texture rate, and FP16 throughput make it attractive for specific rasterization-heavy or half-precision workloads. Its Vulkan result shows it can come close to NVIDIA in modern graphics APIs, and its 12 GB of GDDR6 is still a generous allocation for mobile use. But the data does not show a single benchmark win for AMD, and its average score is about a third lower. The RTX 4000 SFF Ada Generation is also the only one of the two still in active production; the AMD card is end-of-life, having launched earlier (2022 versus 2023). For a user who needs a durable, actively supported accelerator with top-tier compute scores, the NVIDIA card is the choice. For a user who specifically values bandwidth and fill-rate in a mobile form factor and can accept lower compute results, the AMD card remains a viable alternative, but the benchmark record favors NVIDIA across every shared test.