AMD Radeon RX 6850M XT vs NVIDIA RTX A4500 Mobile Comparison

# NVIDIA RTX A4500 Mobile vs AMD Radeon RX 6850M XT

The NVIDIA RTX A4500 Mobile and AMD Radeon RX 6850M XT are two end-of-life mobile GPUs from different design philosophies—one aimed at professional workloads, the other at high-end consumer graphics. The data shows a split decision: NVIDIA wins the OpenCL compute race by 23.8%, while AMD dominates Vulkan performance by 22.6%. Each card occupies a distinct performance tier, with the A4500 Mobile ranking in the 93rd percentile of all GPUs and the RX 6850M XT at the 92nd percentile.

Head-to-Head Benchmarks

The two available direct comparisons paint a clear picture of divergent strengths. In Geekbench OpenCL, the NVIDIA RTX A4500 Mobile scores 105,307 against the AMD Radeon RX 6850M XT's 85,040. That is a 23.8% advantage for NVIDIA in a compute-oriented API that heavily favors raw FP32 throughput and memory bandwidth. The A4500 Mobile's FP32 rating of 17.66 TFLOPS exceeds the RX 6850M XT's 13.21 TFLOPS, and its 512.0 GB/s memory bandwidth outpaces AMD's 432.0 GB/s—both factors directly contribute to this OpenCL lead.

Flip to Vulkan, and the tables turn decisively. The RX 6850M XT posts 99,483 in Geekbench Vulkan versus the A4500 Mobile's 76,960, a 22.6% swing back in AMD's favor. Vulkan workloads often reward higher clock speeds and geometry throughput, and the RX 6850M XT boosts to 2581 MHz with a texture rate of 413.0 GTexel/s, compared to the A4500 Mobile's 1500 MHz boost and 276.0 GTexel/s. The raw pixel rate also favors AMD at 165.2 GPixel/s versus 144.0 GPixel/s, reinforcing the Vulkan result.

Notably, the average benchmark scores tell a different story than either individual test. The A4500 Mobile's average benchmark score is 91,134, derived from its two Geekbench runs, while the RX 6850M XT averages 78,940 across four tests including 3DMark Steel Nomad DX12 and Geekbench Metal. The NVIDIA card's average sits 15.4% higher, but this aggregate includes tests the other card didn't run, so it should be read as a composite index rather than a head-to-head metric.

Architecture Differences

The architectural gap between these two is fundamental. NVIDIA's GA104 chip uses the Ampere architecture on an 8 nm Samsung process, packing 17,400 million transistors into a 392 mm² die. AMD's Navi 22 uses RDNA 2.0 on a 7 nm TSMC process, with 17,200 million transistors in a smaller 335 mm² die. That process advantage shows in transistor density: AMD achieves 51.3M transistors per mm² versus NVIDIA's 44.4M per mm².

Core configurations diverge sharply. The A4500 Mobile fields 5,888 shading units, 184 TMUs, and 96 ROPs, alongside 46 ray tracing cores and 184 tensor cores. The RX 6850M XT counters with 2,560 shading units, 160 TMUs, and 64 ROPs, plus 40 ray tracing cores—but no tensor cores at all. Despite having fewer than half the shading units, AMD's much higher clocks (2321 MHz base, 2581 MHz boost, with a 2463 MHz game clock) close much of the raw compute gap. NVIDIA's 930 MHz base and 1500 MHz boost are dramatically lower, a consequence of the Ampere architecture's design for sustained professional workloads rather than peak gaming clocks.

Memory configurations also differ meaningfully. The A4500 Mobile carries 16 GB of GDDR6 on a 256-bit bus, yielding 512.0 GB/s of bandwidth. The RX 6850M XT has 12 GB of GDDR6 on a narrower 192-bit bus, producing 432.0 GB/s. Both use 16 Gbps and 18 Gbps effective memory speeds respectively, with AMD's faster memory partially compensating for its narrower interface. Thermal design power favors NVIDIA at 140 W versus AMD's 165 W, meaning the A4500 Mobile achieves its results with lower power draw. Both cards are PCIe 4.0 x16 and support DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 identically.

Where Each One Wins

The RTX A4500 Mobile wins in compute-heavy OpenCL workloads, thanks to its 1.34x FP32 advantage (17.66 TFLOPS versus 13.21 TFLOPS) and 18.5% higher memory bandwidth. Its 16 GB frame buffer also gives it a capacity edge for large datasets, and the presence of 184 tensor cores makes it suited for AI inference tasks that AMD cannot accelerate with dedicated hardware. The 140 W TDP means it delivers this performance in a lower power envelope, which matters for thermal-constrained mobile chassis.

The RX 6850M XT wins in Vulkan and Metal environments. Its Geekbench Vulkan score of 99,483 is 29.3% higher than NVIDIA's 76,960, and it also posts a Geekbench Metal score of 128,981—a test the A4500 Mobile doesn't have a recorded result for. The 3DMark Steel Nomad DX12 score of 2,257 further demonstrates DirectX 12 competence. AMD's 2:1 FP16 ratio (26.43 TFLOPS versus NVIDIA's 17.66 TFLOPS at 1:1) gives it a significant advantage in workloads that can leverage half-precision math, such as certain rendering passes and machine learning inference. The higher boost clock of 2581 MHz and texture rate of 413.0 GTexel/s make it more responsive in geometry-heavy and texture-bound scenarios.

For gaming specifically, the RX 6850M XT's higher pixel rate (165.2 GPixel/s) and game clock of 2463 MHz suggest better frame throughput in rasterized titles. The A4500 Mobile's lower clocks and professional focus indicate it prioritizes stability and precision over raw gaming frames.

The Verdict

Choose the NVIDIA RTX A4500 Mobile if your work revolves around OpenCL compute, large memory footprints, or AI acceleration. The 23.8% OpenCL lead is substantial, and the 16 GB VRAM buffer is 33% larger than AMD's 12 GB. The tensor cores provide dedicated hardware for neural network workloads that the RX 6850M XT simply cannot match. Its 93rd percentile ranking versus AMD's 92nd also reflects a slightly higher overall standing in the GPU landscape. The lower 140 W TDP makes it the more power-efficient choice for sustained professional rendering sessions.

Choose the AMD Radeon RX 6850M XT if Vulkan performance, gaming, or half-precision compute are your priorities. The 22.6% Vulkan win is equally decisive, and the FP16 throughput of 26.43 TFLOPS is 49.6% higher than NVIDIA's 17.66 TFLOPS. The Metal score of 128,981 indicates strong macOS compatibility, and the 3DMark Steel Nomad result confirms DirectX 12 capability. For a mobile GPU that prioritizes frame rates and API versatility over raw compute density, the RX 6850M XT is the stronger pick.

The data does not support a universal winner. Each card leads where its architecture is strongest, and both sit near the top of the GPU percentile rankings. The A4500 Mobile edges ahead in average benchmark score (91,134 versus 78,940), but that gap is inflated by test selection. In direct competition, it's a 1-1 split with each card winning by roughly 23%. Your choice should hinge on which API and workload profile matters more.

FAQ

Q: Which GPU has a higher average benchmark score?

A: The NVIDIA RTX A4500 Mobile averages 91,134 across its benchmark results, while the AMD Radeon RX 6850M XT averages 78,940 across its four recorded tests. That's a 15.4% difference, though the tests run are not identical between the two.

Q: How do the two GPUs compare in Vulkan performance?

A: The AMD Radeon RX 6850M XT scores 99,483 in Geekbench Vulkan, which is 22.6% higher than the NVIDIA RTX A4500 Mobile's 76,960. This is AMD's strongest head-to-head result.

Q: What memory configurations do the two cards use?

A: The NVIDIA RTX A4500 Mobile has 16 GB of GDDR6 on a 256-bit bus with 512.0 GB/s bandwidth. The AMD Radeon RX 6850M XT has 12 GB of GDDR6 on a 192-bit bus with 432.0 GB/s bandwidth.

Q: Which GPU has higher clock speeds?

A: The AMD Radeon RX 6850M XT runs at a 2321 MHz base clock and 2581 MHz boost, with a 2463 MHz game clock. The NVIDIA RTX A4500 Mobile is significantly lower at 930 MHz base and 1500 MHz boost.

Q: Does the NVIDIA card have tensor cores?

A: Yes, the RTX A4500 Mobile includes 184 tensor cores. The AMD Radeon RX 6850M XT has no tensor cores, which limits its dedicated AI acceleration capabilities.

Q: What is the power draw difference?

A: The NVIDIA RTX A4500 Mobile has a 140 W TDP, while the AMD Radeon RX 6850M XT draws 165 W. NVIDIA achieves its compute lead with 25 W less power.