AMD Radeon HD 8750M vs Intel Iris Pro Graphics P6300 Comparison

The AMD Radeon HD 8750M and Intel Iris Pro Graphics P6300 are both end-of-life mobile graphics solutions, but benchmark data shows a clear, if narrow, winner. In the sole head-to-head benchmark available, the AMD Radeon HD 8750M outperforms the Intel Iris Pro Graphics P6300, securing a 4.5% lead in Geekbench OpenCL scores (5970 vs 5712). This places the AMD part at the 34th percentile of all GPUs, while the Intel solution sits just one point lower at the 33rd percentile, indicating both are entry-level performers by modern standards.

Head-to-Head Benchmarks

The only direct comparison available is the Geekbench OpenCL test, and the results are decisive for AMD. The Radeon HD 8750M scores 5970, while the Iris Pro Graphics P6300 scores 5712. That 258-point gap translates to a 4.5% performance advantage for the AMD part. This is a statistically significant margin in synthetic workloads, suggesting the AMD solution holds a tangible edge in general-purpose compute tasks.

The delta is consistent with the nearest rival data. The Radeon HD 8750M’s closest competitor is the NVIDIA Quadro K4000, which averages 5982 and is only 0.2% faster. On the other side, the Iris Pro P6300’s closest rival is the NVIDIA GeForce GTX 670MX, which averages 5721 and is 0.1% faster. Both parts are tightly clustered with their respective peers, but the AMD chip’s cluster sits roughly 4-5% higher on the performance scale.

Looking at the margins, the AMD Radeon HD 8750M is 0.2% faster than the AMD Radeon HD 8730M (5955) and 0.3% faster than the NVIDIA Quadro K620M (5957). The Intel Iris Pro P6300 is 0.4% faster than the AMD Radeon HD 8790M (5691) and 1.9% faster than the NVIDIA Quadro M500M (5604). These figures confirm that while both GPUs are near the bottom of the performance hierarchy, the AMD part consistently edges out its immediate rivals by small but measurable amounts.

Where Each One Wins

The AMD Radeon HD 8750M wins the only benchmark category recorded, making it the default choice for compute-heavy workloads. Its 4.5% advantage in OpenCL means applications leveraging GPU acceleration for tasks like video encoding, image processing, or scientific calculations will see better performance on the AMD part. The data shows a single win for AMD and zero for Intel, leaving no category where the Intel solution takes the lead.

However, the Intel Iris Pro Graphics P6300 is not without merit in qualitative terms. It features a 15 W TDP, which is a clearly defined power envelope, whereas the AMD part has no TDP listed. For systems prioritizing low power consumption and thermal efficiency, the Intel solution’s defined power characteristics are an advantage, even if raw performance is lower. The Intel part also uses system-shared memory, which simplifies system design, though this comes with bandwidth that is "System Dependent" and cannot match the dedicated 28.80 GB/s of the AMD part.

In terms of rendering throughput, the AMD Radeon HD 8750M has a higher pixel rate at 6.600 GPixel/s versus 4.800 GPixel/s for Intel, a 37.5% advantage. But the Intel Iris Pro P6300 counters with a higher texture rate: 38.40 GTexel/s versus 19.80 GTexel/s for AMD, which is a 94% advantage. This suggests the Intel part could be better suited for texture-bound workloads, despite losing the overall compute benchmark.

Architecture Differences

The two GPUs are built on fundamentally different architectures and process nodes. AMD uses the Graphics Core Next (GCN) 1.0 architecture on a 28 nm TSMC process, featuring 950 million transistors on a 77 mm² die. The Intel Iris Pro P6300 uses Intel’s Generation 8.0 architecture on a 14 nm Intel process, with no transistor or die size data provided. This node advantage gives Intel a more modern manufacturing process, though the AMD part’s larger die and dedicated memory system compensate in raw performance.

Both parts have 384 shading units, but the similarity ends there. The Intel part has double the texture mapping units (48 vs 24), which explains its higher texture rate. Conversely, the AMD part has more render output units (8 vs 6), driving its higher pixel rate. The AMD chip uses a 128-bit DDR3 memory interface with 1024 MB of dedicated memory and 28.80 GB/s bandwidth, while the Intel part relies on system-shared memory with no fixed bus width or bandwidth figures.

API support differs notably. Both support DirectX 12 (11_1) and Vulkan, but the AMD part supports OpenGL 4.6 and Vulkan 1.2.170, while the Intel part is limited to OpenGL 4.4 and Vulkan 1.0. The AMD Radeon HD 8750M also has a higher FP32 compute rating at 633.6 GFLOPS versus 614.4 GFLOPS for Intel, a 3.1% difference that aligns with the benchmark results.

Specification Differences

The specification sheets reveal several key differences. The process node is a major divider: AMD uses 28 nm TSMC, while Intel uses 14 nm Intel. The AMD chip has 950 million transistors on a 77 mm² die, giving a transistor density of 12.3M / mm²; the Intel part has no such data. Clock speeds differ significantly: the AMD base clock is 775 MHz with an 825 MHz boost, while the Intel base is only 300 MHz with an 800 MHz boost. The AMD boost clock is 3.1% higher, but the Intel base clock is 61% lower.

Memory is another divider. The AMD Radeon HD 8750M has 1024 MB of DDR3 on a 128-bit bus with 28.80 GB/s bandwidth and a 900 MHz memory clock (1800 Mbps effective). The Intel Iris Pro P6300 uses System Shared memory with System Shared type, bus width, and bandwidth described as "System Dependent." The TDP is listed for Intel at 15 W, while AMD has no TDP value. The Intel part is an IGP with a Ring Bus interface, while the AMD part uses PCIe 3.0 x8.

Other differences: the AMD part has a release date of 2013-02-25, while the Intel part is dated 2014-09-04. The AMD chip’s predecessor is "London" and successor is "Gem System," while the Intel part lists neither. Display outputs are "Motherboard Dependent" for Intel, while AMD has no listing. The AMD part uses a "Mars" chip, while Intel uses "Broadwell GT3e."

FAQ

Q: Which GPU is faster in Geekbench OpenCL?

A: The AMD Radeon HD 8750M is faster, scoring 5970 versus 5712 for the Intel Iris Pro P6300, a 4.5% advantage.

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

A: The AMD part is 0.2% slower than the NVIDIA Quadro K4000 and 0.2% faster than the NVIDIA Quadro K620M. The Intel part is 0.1% slower than the NVIDIA GeForce GTX 670MX and 1.9% faster than the NVIDIA Quadro M500M.

Q: What are the shading unit counts for each?

A: Both the AMD Radeon HD 8750M and Intel Iris Pro P6300 have exactly 384 shading units.

Q: What is the process node difference?

A: The AMD Radeon HD 8750M uses a 28 nm TSMC process, while the Intel Iris Pro P6300 uses a 14 nm Intel process.

Q: What is the memory configuration for each?

A: The AMD part has 1024 MB of DDR3 on a 128-bit bus with 28.80 GB/s bandwidth. The Intel part uses System Shared memory with system-dependent bandwidth.

Q: Which GPU has a higher pixel rate?

A: The AMD Radeon HD 8750M has a 6.600 GPixel/s pixel rate, which is 37.5% higher than the Intel Iris Pro P6300’s 4.800 GPixel/s.

The Verdict

The data is unambiguous: the AMD Radeon HD 8750M is the faster GPU. It wins the only benchmark head-to-head with a 4.5% margin, has a higher FP32 compute rating (633.6 vs 614.4 GFLOPS), and a higher pixel rate (6.600 vs 4.800 GPixel/s). For anyone choosing between these two solely on compute performance, the AMD part is the correct pick.

However, the Intel Iris Pro P6300 has a defined 15 W TDP, while the AMD part has no TDP listed, making Intel the safer choice for power-constrained designs. The Intel part also offers double the texture rate (38.40 vs 19.80 GTexel/s), which could benefit texture-heavy workloads despite the overall benchmark loss. Its 14 nm process is more modern than AMD’s 28 nm node, and its system-shared memory simplifies system integration.

For users prioritizing raw OpenCL performance, the AMD Radeon HD 8750M is the winner. For those prioritizing low power consumption and texture throughput, the Intel Iris Pro P6300 has a niche. But based on the benchmark data, the AMD part is the overall performance leader, and that is the conclusion the numbers support.