AMD Radeon RX 6850M XT vs NVIDIA RTX 4500 Ada Generation Comparison

Head-to-Head Benchmarks

The recorded data shows a decisive advantage for the NVIDIA RTX 4500 Ada Generation across every shared benchmark. In Geekbench OpenCL, the NVIDIA card scores 160,786 against the AMD Radeon RX 6850M XT’s 85,040, a delta of 89.1% in favor of the RTX 4500. That is nearly double the raw compute throughput in a general-purpose workload, which aligns with the specifications: the RTX 4500 delivers 39.63 TFLOPS FP32, while the RX 6850M XT delivers 13.21 TFLOPS. The gap is not marginal; it is a class-level separation.

The Vulkan results tell a similar story. The RTX 4500 Ada Generation posts 171,401, while the RX 6850M XT manages 99,483, a 72.3% advantage for the NVIDIA part. This is notable because Vulkan is often considered a more efficient API for AMD hardware, yet the NVIDIA card still wins by a wide margin. The RTX 4500 also holds a higher percentile rank at 97 versus 92 for the RX 6850M XT, meaning the NVIDIA part outperforms a larger share of all GPUs in the database.

The RX 6850M XT does have additional benchmark entries not shared with the RTX 4500: a 3DMark Steel Nomad DX12 score of 2,257 and a Geekbench Metal score of 128,981. These cannot be compared directly, but they do indicate the AMD part has strengths in specific API environments. However, in the two tests where both cards appear, the NVIDIA RTX 4500 wins both, giving it a 2-0 record in head-to-head matchups.

Architecture Differences

The two GPUs come from fundamentally different design philosophies. The NVIDIA RTX 4500 Ada Generation uses the AD103 chip built on TSMC’s 5 nm process, with 45,900 million transistors packed into a 379 mm² die. That works out to a transistor density of 121.1 million per square millimeter. The AMD Radeon RX 6850M XT uses the Navi 22 chip on TSMC’s 7 nm node, with 17,200 million transistors on a 335 mm² die, for a density of 51.3 million per square millimeter. The process advantage is clear: the NVIDIA part packs more than twice the transistors per area, which explains its higher compute throughput despite a similar physical footprint.

Architecturally, the RTX 4500 is Ada Lovelace, while the RX 6850M XT is RDNA 2.0. The NVIDIA part has 7,680 shading units, 240 texture mapping units, and 80 ROPs. It also includes 60 ray tracing cores and 240 tensor cores, the latter being entirely absent from the AMD specification. The RX 6850M XT has 2,560 shading units, 160 TMUs, and 64 ROPs, with 40 ray tracing cores but no tensor cores. The lack of tensor cores is significant for AI-accelerated workloads, though the RX 6850M XT does support FP16 at a 2:1 ratio (26.43 TFLOPS), whereas the RTX 4500 does FP16 at 1:1 (39.63 TFLOPS). In practice, the NVIDIA card has higher FP16 throughput even at 1:1, which is unusual and points to a much larger compute pipeline.

Memory architecture also diverges. The RTX 4500 has 24 GB of GDDR6 on a 192-bit bus, yielding 432.0 GB/s of bandwidth. The RX 6850M XT has 12 GB of GDDR6 on the same 192-bit bus, also yielding 432.0 GB/s. The bus width and bandwidth are identical, but the NVIDIA card has twice the memory capacity. This matters for large datasets, rendering scenes, or AI model inference where capacity is the limiting factor.

Where Each One Wins

The NVIDIA RTX 4500 Ada Generation wins in every measured category that matters for compute-heavy tasks. It is 89.1% ahead in OpenCL and 72.3% ahead in Vulkan, making it the clear choice for general-purpose GPU compute, rendering, and any workload that leverages FP32 or FP16 performance. Its 24 GB memory capacity also gives it an edge for large-scale data processing, where the 12 GB on the RX 6850M XT could become a bottleneck. The RTX 4500’s 97th percentile rank versus the RX 6850M XT’s 92nd reinforces this: it sits near the top of the database, while the AMD part is merely above average.

The AMD Radeon RX 6850M XT does have some redeeming qualities, but they are not visible in the shared benchmarks. Its 3DMark Steel Nomad DX12 score of 2,257 and Geekbench Metal score of 128,981 suggest it can perform well in DirectX 12 and Apple’s Metal API, but those results are not comparable to the NVIDIA part’s scores. The RX 6850M XT also has a higher base clock (2,321 MHz versus 2,070 MHz) and a nearly identical boost clock (2,581 MHz versus 2,580 MHz), but the NVIDIA part’s superior architecture and raw compute resources overwhelm any clock advantage.

For gaming or mobile workloads, the RX 6850M XT is a mobile part (IGP form factor) with a 165 W TDP, while the RTX 4500 is a dual-slot desktop workstation card with a 210 W TDP. The AMD part is end-of-life, whereas the NVIDIA part is still active in production. If the workload is portable, the RX 6850M XT has the advantage of being designed for laptops, but the benchmark data shows it cannot match the RTX 4500 in raw performance.

Specification Differences

The two cards differ on nearly every specification except a few notable overlaps. Both use GDDR6 memory, both have a 192-bit memory bus, both deliver 432.0 GB/s bandwidth, both use PCIe 4.0 x16, and both support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Beyond that, the differences are stark.

The RTX 4500 has 24 GB memory versus 12 GB on the RX 6850M XT. The NVIDIA part has 7,680 shading units versus 2,560, 240 TMUs versus 160, and 80 ROPs versus 64. It has 60 RT cores versus 40, and 240 tensor cores versus none. The RTX 4500’s pixel rate is 206.4 GPixel/s versus 165.2 GPixel/s, and its texture rate is 619.2 GTexel/s versus 413.0 GTexel/s. FP32 performance is 39.63 TFLOPS versus 13.21 TFLOPS, and FP16 is 39.63 TFLOPS (1:1) versus 26.43 TFLOPS (2:1).

The process nodes are 5 nm versus 7 nm, with the NVIDIA part using a 379 mm² die and the AMD part using a 335 mm² die. Transistor counts are 45,900 million versus 17,200 million. The RTX 4500 has a base clock of 2,070 MHz and boost of 2,580 MHz, while the RX 6850M XT has a base of 2,321 MHz and boost of 2,581 MHz, plus a game clock of 2,463 MHz. The TDP is 210 W versus 165 W, and the RTX 4500 is dual-slot with no power connectors (it draws from the PCIe slot), while the RX 6850M XT is IGP (integrated into a laptop) with no power connectors either. The RTX 4500 has 4x DisplayPort 1.4a outputs, while the RX 6850M XT has portable-device-dependent outputs. The NVIDIA part measures 245 mm by 112 mm, while the AMD part has no listed dimensions.

The release dates are 2023-08-08 for the RTX 4500 and 2022-01-03 for the RX 6850M XT. The RTX 4500’s predecessor is Workstation Ampere and its successor is Blackwell PRO W. The RX 6850M XT’s predecessor is Polaris Mobile and it has no listed successor.

FAQ

Q: Which GPU has higher FP32 performance?

A: The NVIDIA RTX 4500 Ada Generation delivers 39.63 TFLOPS FP32, which is three times the 13.21 TFLOPS of the AMD Radeon RX 6850M XT.

Q: How much memory does each card have?

A: The RTX 4500 has 24 GB of GDDR6, while the RX 6850M XT has 12 GB of GDDR6. Both have a 192-bit bus and 432.0 GB/s bandwidth.

Q: Are there any benchmarks where the AMD card wins?

A: In the shared head-to-head tests (Geekbench OpenCL and Vulkan), the NVIDIA card wins both. The AMD card has separate scores in 3DMark Steel Nomad (2,257) and Geekbench Metal (128,981), but these are not directly comparable.

Q: What is the TDP difference?

A: The RTX 4500 has a 210 W TDP, while the RX 6850M XT has a 165 W TDP. The RTX 4500 is a dual-slot desktop card, and the RX 6850M XT is an IGP (mobile) part.

Q: Does the AMD card have tensor cores?

A: No, the RX 6850M XT has no tensor cores. The RTX 4500 has 240 tensor cores, which are useful for AI and machine learning workloads.

Q: Which card is more recent?

A: The RTX 4500 was released on 2023-08-08 and is still active in production. The RX 6850M XT was released on 2022-01-03 and is end-of-life.

The Verdict

The data is unambiguous: the NVIDIA RTX 4500 Ada Generation is the superior GPU in every shared benchmark and specification that matters for raw performance. It is 89.1% ahead in OpenCL, 72.3% ahead in Vulkan, has three times the FP32 throughput, double the memory capacity, and a higher percentile rank (97 versus 92). It also has tensor cores, a more advanced 5 nm process, and a newer architecture with more shading units, TMUs, and ROPs. For anyone doing compute, rendering, or AI-adjacent work on a desktop, the RTX 4500 is the clear choice.

The AMD Radeon RX 6850M XT is a mobile part, designed for laptops and portable systems. Its 165 W TDP and IGP form factor make it suitable for that use case, and it does have a slightly higher base clock and a game clock of 2,463 MHz. However, its 12 GB memory and 13.21 TFLOPS FP32 are far below the RTX 4500’s capabilities. If the workload is portable and does not require extreme compute, the RX 6850M XT may suffice, but the recorded benchmark data shows it cannot compete with the RTX 4500 in raw performance.

The choice is simple: the RTX 4500 for workstation-class desktop tasks, the RX 6850M XT for mobile systems where the RTX 4500’s dual-slot design and 210 W TDP are not viable. The RTX 4500’s 24 GB memory and 97th percentile standing make it a top-tier part in the database, while the RX 6850M XT’s 92nd percentile is respectable but not in the same league. The benchmark results indicate that any user prioritizing compute performance should select the NVIDIA card without hesitation.