AMD Radeon 540 vs AMD Radeon HD 8850M Comparison

The AMD Radeon 540 and the AMD Radeon HD 8850M are both end-of-life mobile graphics solutions from the same manufacturer, but they represent vastly different eras of GPU design. The Radeon 540, built on a modern 14 nm process with GCN 4.0 architecture, offers a higher feature set and efficiency, while the older Radeon HD 8850M, based on 28 nm GCN 1.0, counters with a wider memory bus and more raw shading hardware. The benchmark data reveals a clear, albeit narrow, performance hierarchy between the two, with the older part taking a decisive lead in the single available compute test.

Head-to-Head Benchmarks

The only direct benchmark comparison available is the Geekbench OpenCL test, and the results are unambiguous. The AMD Radeon HD 8850M scores 7447, while the AMD Radeon 540 scores 6184. This translates to a 17% deltaPct in favor of the HD 8850M, making it the winner of this specific head-to-head matchup. In absolute terms, the HD 8850M is roughly one-fifth faster than the Radeon 540 in this compute-oriented workload, a significant margin that suggests the older card's architectural advantages in raw throughput are not negated by its older process node.

This victory is notable because it flips the expected narrative of generational improvement. The Radeon 540's GCN 4.0 architecture is newer, but the data shows that the HD 8850M's higher shading unit count and wider memory interface provide a tangible performance benefit in OpenCL compute. The Radeon 540 does not win any of the head-to-head benchmarks, with winsA equal to 0, while the HD 8850M takes the sole victory with winsB equal to 1.

When placed in the broader context of their respective peer groups, the scores further contextualize this gap. The Radeon 540's average benchmark score of 7673 is derived from both its OpenCL and Vulkan results, while the HD 8850M's average is solely 7447 from the OpenCL test. In the nearestRivals list, the Radeon 540 sits extremely close to the NVIDIA GeForce GTX 1660 Ti, which averages 7723, a deltaPct of only -0.6%. This indicates the Radeon 540 is nearly as fast as a GTX 1660 Ti in aggregate benchmarks, despite the latter being a much more modern and expensive desktop part. The HD 8850M, meanwhile, is positioned right alongside the Intel UHD Graphics 750 (deltaPct of 0.1%), suggesting its performance level is comparable to modern integrated graphics in the average score metric.

The discrepancy between the head-to-head OpenCL result and the average benchmark score is telling. The Radeon 540's Vulkan score of 9162 is significantly higher than its OpenCL score, pulling its average up to 7673. The HD 8850M has no Vulkan score recorded, meaning its average is dragged down by only having the one OpenCL result. Therefore, while the HD 8850M wins the direct compute matchup, the Radeon 540 demonstrates superior capability in modern graphics APIs, as evidenced by its strong Vulkan showing.

The Verdict

From the data alone, the AMD Radeon HD 8850M is the faster card for pure compute workloads, as evidenced by its 17% lead in the Geekbench OpenCL test. The Radeon 540, however, is not without its merits. Its average benchmark score of 7673 is higher than the HD 8850M's 7447, driven by a very strong Vulkan score of 9162. This suggests that in modern gaming or compute APIs that leverage Vulkan, the Radeon 540 would likely outperform the older card, despite losing the OpenCL-specific test.

The Radeon 540 should be the choice for users who prioritize modern API support and efficiency. Its GCN 4.0 architecture, 14 nm process, and support for DirectX 12 (12_0) and Vulkan 1.3 make it a more future-proof option for contemporary software. In contrast, the HD 8850M, with its GCN 1.0 architecture and Vulkan 1.2.170 support, is a legacy part that excels in raw compute but lacks the modern feature set. The HD 8850M's higher memory bandwidth (64.00 GB/s vs 24.00 GB/s) and larger 128-bit bus width are significant advantages for memory-intensive tasks, but the Radeon 540's higher pixel rate (18.93 GPixel/s vs 10.00 GPixel/s) indicates better fill-rate performance per clock.

For a user with an older system that relies on OpenCL-accelerated applications, the HD 8850M is the data-backed winner. For anyone running modern games or applications that can utilize Vulkan, the Radeon 540's superior API support and higher aggregate score make it the more versatile option. The Radeon 540 also holds a 41st percentile rank versus all GPUs, compared to the HD 8850M's 40th percentile, indicating a marginal overall standing in the global performance distribution.

Architecture Differences

The two GPUs are separated by four years of architectural evolution. The Radeon 540 is built on the GCN 4.0 architecture using a 14 nm process at GlobalFoundries, featuring the Lexa chip. It packs 2,200 million transistors into a 103 mm² die, yielding a transistor density of 21.4M / mm². In contrast, the Radeon HD 8850M uses the older GCN 1.0 architecture on a 28 nm process at TSMC, with the Venus chip. It contains 1,500 million transistors on a larger 123 mm² die, resulting in a lower density of 12.2M / mm².

The compute configurations differ significantly. The Radeon 540 has 384 shading units, 24 texture mapping units (TMUs), and 16 raster operation units (ROPs). The HD 8850M, despite being older, has more hardware: 640 shading units, 40 TMUs, and 16 ROPs. This explains its raw compute advantage in OpenCL. The Radeon 540 compensates with higher clock speeds: its memory runs at 1500 MHz (6 Gbps effective), while the HD 8850M's memory runs at 1000 MHz (4 Gbps effective). The Radeon 540 also has a higher pixel rate of 18.93 GPixel/s and a texture rate of 28.39 GTexel/s, compared to the HD 8850M's 10.00 GPixel/s and 25.00 GTexel/s.

Memory configuration is a major differentiator. The Radeon 540 uses 1024 MB of GDDR5 on a narrow 32-bit bus, yielding just 24.00 GB/s of bandwidth. The HD 8850M uses 2048 MB of GDDR5 on a 128-bit bus, quadrupling the bandwidth to 64.00 GB/s. This makes the HD 8850M far superior for memory-heavy workloads. The Radeon 540 also has a much lower TDP at 50 W, whereas the HD 8850M's TDP is not listed, but its older process and more shading units suggest higher power draw. The Radeon 540 is a single-slot card with no power connectors and a suggested PSU of 250 W, while the HD 8850M's slot width and power requirements are unspecified.

Feature support also diverges. The Radeon 540 supports DirectX 12 (12_0) and Vulkan 1.3, while the HD 8850M supports DirectX 12 (11_1) and Vulkan 1.2.170. Both support OpenGL 4.6. The Radeon 540 has display outputs (2x DisplayPort 1.4a) and uses a PCIe 3.0 x8 interface, whereas the HD 8850M has no listed display outputs and uses a PCIe 3.0 x16 interface. The Radeon 540 also lists FP16 performance at 908.5 GFLOPS (1:1), while the HD 8850M has no FP16 data.

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The AMD Radeon HD 8850M is faster, scoring 7447 compared to the Radeon 540's 6184, a 17% deltaPct in favor of the HD 8850M.

Q: Does the Radeon 540 have any benchmark advantage over the HD 8850M?

A: Yes, the Radeon 540 has a higher average benchmark score of 7673 (from both OpenCL and Vulkan tests) versus the HD 8850M's 7447 (from OpenCL only). The Radeon 540's Vulkan score of 9162 is particularly strong.

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

A: The HD 8850M has 64.00 GB/s of bandwidth due to its 128-bit bus, while the Radeon 540 has only 24.00 GB/s from a 32-bit bus. The HD 8850M also has 2 GB of memory versus 1 GB on the Radeon 540.

Q: Which GPU has a more modern architecture?

A: The Radeon 540 uses the newer GCN 4.0 architecture on a 14 nm process, while the HD 8850M uses GCN 1.0 on a 28 nm process.

Q: How do these GPUs compare to their nearest rivals?

A: The Radeon 540 is within 0.6% of the NVIDIA GeForce GTX 1660 Ti's average score (7723), while the HD 8850M is within 0.1% of the Intel UHD Graphics 750 (7441).

Q: Which GPU has higher shading unit count?

A: The HD 8850M has 640 shading units, significantly more than the Radeon 540's 384 shading units.

Where Each One Wins

The AMD Radeon HD 8850M wins decisively in raw compute throughput, as demonstrated by its 17% lead in the Geekbench OpenCL test. This makes it the superior choice for legacy OpenCL-accelerated applications, such as older video encoding tools or scientific computing tasks that rely on this API. Its larger 2 GB memory pool and 128-bit bus width, providing 64.00 GB/s of bandwidth, give it a clear edge in memory-bandwidth-sensitive workloads. The HD 8850M also holds a slight edge in raw shading power with 640 shading units and 40 TMUs, which can benefit certain compute kernels that scale with these resources.

The AMD Radeon 540 wins in modern graphics API performance and efficiency. Its Vulkan score of 9162 is a standout figure, indicating strong performance in modern games and applications that utilize Vulkan. The card's support for DirectX 12 (12_0) and Vulkan 1.3, along with its higher pixel rate of 18.93 GPixel/s, makes it more suitable for contemporary gaming workloads. Its 14 nm process and 50 W TDP also make it a much more power-efficient solution, with a lower suggested PSU requirement of 250 W. For users running modern software, the Radeon 540's superior feature set and higher average benchmark score (7673) make it the more versatile and future-ready option, despite losing the single OpenCL head-to-head.

In summary, the HD 8850M is the champion of legacy compute and memory-intensive tasks, while the Radeon 540 is the winner for modern API support, efficiency, and overall aggregate performance. The choice depends entirely on the software environment: older OpenCL-centric workloads favor the HD 8850M, while modern Vulkan-based applications favor the Radeon 540.