AMD Radeon HD 8790M vs Intel UHD Graphics P750 Comparison

Intel UHD Graphics P750 and AMD Radeon HD 8790M represent two distinct approaches to mobile graphics, one integrated into the CPU die and the other a discrete module. The database records only a single shared benchmark, Geekbench OpenCL, and the results show a decisive performance gap between the two. The Intel UHD Graphics P750 scores 6554 points, while the AMD Radeon HD 8790M scores 5017 points, yielding a 30.6% advantage for the Intel part in this specific test. This is the only head-to-head comparison available, and it determines the win count: one win for Intel, zero for AMD.

Head-to-Head Benchmarks

The sole recorded benchmark comparison places the Intel UHD Graphics P750 firmly ahead. The Geekbench OpenCL score of 6554 for the Intel part versus 5017 for the AMD Radeon HD 8790M translates to a 30.6% delta, a substantial margin in a compute-oriented workload. This result is consistent with the broader percentile rankings in the database. The Intel UHD Graphics P750 sits at the 38th percentile of all GPUs, while the AMD Radeon HD 8790M ranks lower at the 33rd percentile. The average benchmark score across all recorded tests for the Intel part is 6554, while the AMD part's average, including its Vulkan score, is 5691.

When examining the nearest rivals for each card, the competitive context becomes clearer. The Intel UHD Graphics P750's closest competitor is the AMD Radeon HD 7730M, which scores 6581, a mere 0.4% difference. The NVIDIA GeForce GTX 670M scores 6513, putting it 0.6% behind the Intel part. The AMD Radeon R7 M460 scores 6612, which is 0.9% ahead, and the NVIDIA GeForce GT 555M scores 6493, trailing by 0.9%. These tight margins indicate that the Intel UHD Graphics P750 is positioned within a very competitive cluster of mid-range mobile GPUs from the same era. Its 30.6% lead over the AMD Radeon HD 8790M is therefore not a reflection of the Intel part being exceptionally fast in absolute terms, but rather of the AMD part being noticeably slower than its direct peers.

The AMD Radeon HD 8790M's nearest rivals reinforce this view. The Intel Iris Pro Graphics P6300 scores 5712, which is 0.4% higher than the AMD part. The NVIDIA GeForce GTX 670MX scores 5721, a 0.5% difference, and the NVIDIA GeForce GTX 550 Ti scores 5731, a 0.7% difference. The NVIDIA Quadro M500M scores 5604, which is 1.6% lower. The AMD Radeon HD 8790M's score of 5017 in OpenCL is significantly below all of these rivals, making its 33rd percentile ranking understandable. The data shows a clear stratification: the Intel UHD Graphics P750 competes with a higher tier of mobile GPUs, while the AMD Radeon HD 8790M sits in a lower performance band, despite having a larger number of shading units.

The benchmark results indicate that for OpenCL compute tasks, the Intel UHD Graphics P750 is the superior choice. The 30.6% delta is not a minor fluctuation; it is a substantial performance advantage that would manifest in real-world workloads that leverage OpenCL. The AMD Radeon HD 8790M does have a separate Vulkan score of 6365, which is notably higher than its OpenCL score, suggesting that its performance varies significantly depending on the API. However, without a head-to-head Vulkan comparison with the Intel part, the OpenCL result remains the definitive metric for direct competition. The recorded data shows a single winner, and it is the Intel UHD Graphics P750.

Architecture Differences

The two GPUs are built on fundamentally different architectures and manufacturing processes, which explains their divergent performance profiles. The Intel UHD Graphics P750 is an integrated graphics processor based on the Rocket Lake chip, using Intel's Generation 12.1 architecture. It is manufactured on Intel's 14 nm+++ process node at Intel's own foundry. In contrast, the AMD Radeon HD 8790M is a discrete GPU based on the Mars chip, using the GCN 1.0 architecture. It is built on a 28 nm process at TSMC, and the die size is recorded as 77 mm² with 950 million transistors, giving a transistor density of 12.3M per mm². The Intel part does not have recorded transistor or die size data.

The compute unit configurations differ markedly. The Intel UHD Graphics P750 has 256 shading units, 64 texture mapping units, and 32 raster output units. The AMD Radeon HD 8790M has 384 shading units, 24 texture mapping units, and only 8 raster output units. This is a significant architectural divergence: AMD packs more shaders but far fewer texture and pixel processing units. The consequences are visible in the calculated rates. The Intel part achieves a pixel rate of 41.60 GPixel/s and a texture rate of 83.20 GTexel/s. The AMD part manages only 7.200 GPixel/s and 21.60 GTexel/s. Despite having 50% more shading units, the AMD card's fillrate capabilities are drastically lower, which impacts its performance in geometry-heavy and pixel-heavy workloads.

Clock speeds also play a role. The Intel UHD Graphics P750 has a base clock of 350 MHz and a boost clock of 1300 MHz. The AMD Radeon HD 8790M runs at a base clock of 850 MHz and a boost clock of 900 MHz. The AMD part starts at a much higher base frequency, but its boost headroom is minimal, only 50 MHz. The Intel part's boost clock is 400 MHz above its base, allowing it to scale significantly under load. The memory subsystems are entirely different as well. The Intel UHD Graphics P750 uses system shared memory, with a system-dependent bandwidth. The AMD Radeon HD 8790M has 2 GB of dedicated GDDR5 memory on a 128-bit bus, providing a fixed bandwidth of 64.00 GB/s. The memory clock for the AMD part is 1000 MHz, rated at 4 Gbps effective.

The floating-point performance is close despite the architectural differences. The Intel UHD Graphics P750 delivers 665.6 GFLOPS of FP32 performance, while the AMD Radeon HD 8790M delivers 691.2 GFLOPS. The AMD part is slightly ahead in raw FP32, but the Intel part also has recorded FP16 performance of 1,331.2 GFLOPS, using a 2:1 ratio. The AMD part has no recorded FP16 data. The API support is comparable, with both supporting DirectX 12 and OpenGL 4.6. The Intel part supports Vulkan 1.4, while the AMD part supports Vulkan 1.2.170. The production status for both is end-of-life. The AMD Radeon HD 8790M has a recorded release date of 2013-03-31, while the Intel part has no release date in the database.

The Verdict

The data points to a clear verdict for compute performance: the Intel UHD Graphics P750 is the stronger GPU. Its 30.6% lead over the AMD Radeon HD 8790M in the only shared benchmark is decisive. The Intel part's 38th percentile ranking versus AMD's 33rd percentile confirms that this is not an isolated result but a consistent performance tier difference. Users whose workloads rely on OpenCL acceleration should favor the Intel UHD Graphics P750 without hesitation, as it delivers a substantial performance advantage in this API.

However, the AMD Radeon HD 8790M is not without merit for a specific subset of users. Its Vulkan score of 6365 is higher than its OpenCL score of 5017, indicating that it performs significantly better under the Vulkan API. For applications that use Vulkan, the AMD part may offer competitive performance, though no direct comparison with the Intel part in this API exists in the database. The AMD part also has dedicated GDDR5 memory with a fixed 64.00 GB/s bandwidth, which can be advantageous in scenarios where memory bandwidth is a bottleneck, whereas the Intel part relies on system memory with variable bandwidth. For users who already have a system with an Intel UHD Graphics P750, the data suggests no reason to seek out the AMD Radeon HD 8790M for compute tasks. For users considering a system with the AMD part, the data advises caution in OpenCL-heavy workloads, as the performance is notably below its rivals.

The architectural differences also inform the verdict. The Intel part's much higher pixel and texture rates, 41.60 GPixel/s and 83.20 GTexel/s respectively, versus the AMD part's 7.200 GPixel/s and 21.60 GTexel/s, suggest that the Intel GPU may be more balanced for graphics rendering tasks, even if raw FP32 compute is slightly lower. The AMD part's high shader count does not translate into superior real-world performance in the recorded data. The verdict is straightforward: for the measured benchmarks, the Intel UHD Graphics P750 is the superior product.

Specification Differences

The following fields differ between the two GPUs in the database:

• Chip: Intel UHD Graphics P750 uses Rocket Lake; AMD Radeon HD 8790M uses Mars.
• Architecture: Intel uses Generation 12.1; AMD uses GCN 1.0.
• Generation: Intel is HD Graphics-W (Rocket Lake); AMD is Solar System (HD 8700M).
• Process Node: Intel is 14 nm+++; AMD is 28 nm.
• Foundry: Intel uses Intel; AMD uses TSMC.
• Transistors: Intel has no recorded data; AMD has 950 million.
• Die Size: Intel has no recorded data; AMD has 77 mm².
• Transistor Density: Intel has no recorded data; AMD has 12.3M / mm².
• Base Clock: Intel is 350 MHz; AMD is 850 MHz.
• Boost Clock: Intel is 1300 MHz; AMD is 900 MHz.
• Memory Size: Intel is System Shared; AMD is 2 GB.
• Memory Type: Intel is System Shared; AMD is GDDR5.
• Memory Bus Width: Intel is System Shared; AMD is 128 bit.
• Memory Bandwidth: Intel is System Dependent; AMD is 64.00 GB/s.
• Memory Clock: Intel has no recorded data; AMD is 1000 MHz, 4 Gbps effective.
• Shading Units: Intel has 256; AMD has 384.
• TMUs: Intel has 64; AMD has 24.
• ROPs: Intel has 32; AMD has 8.
• Pixel Rate: Intel is 41.60 GPixel/s; AMD is 7.200 GPixel/s.
• Texture Rate: Intel is 83.20 GTexel/s; AMD is 21.60 GTexel/s.
• FP32: Intel is 665.6 GFLOPS; AMD is 691.2 GFLOPS.
• FP16: Intel is 1,331.2 GFLOPS (2:1); AMD has no recorded data.
• TDP: Intel is 15 W; AMD has no recorded data.
• Slot Width: Intel is IGP; AMD is MXM Module.
• Power Connectors: Intel has no recorded data; AMD is None.
• Bus Interface: Intel is Ring Bus; AMD is MXM-A (3.0).
• Display Outputs: Intel is Motherboard Dependent; AMD is Portable Device Dependent.
• Vulkan Support: Intel is 1.4; AMD is 1.2.170.
• Release Date: Intel has no recorded data; AMD is 2013-03-31.
• Predecessor: Intel has no recorded data; AMD is London.
• Successor: Intel has no recorded data; AMD is Gem System.

FAQ

Q: Which GPU has the higher Geekbench OpenCL score?

A: The Intel UHD Graphics P750 scores 6554, while the AMD Radeon HD 8790M scores 5017. The Intel part is 30.6% faster in this benchmark.

Q: What is the average benchmark score for each GPU?

A: The Intel UHD Graphics P750 has an average score of 6554 across its recorded benchmarks. The AMD Radeon HD 8790M has an average score of 5691, which includes its OpenCL score of 5017 and its Vulkan score of 6365.

Q: How does the shading unit count compare between the two GPUs?

A: The AMD Radeon HD 8790M has 384 shading units, while the Intel UHD Graphics P750 has 256 shading units. Despite having more shading units, the AMD part scores lower in the OpenCL benchmark.

Q: What is the memory configuration of the AMD Radeon HD 8790M?

A: The AMD Radeon HD 8790M has 2 GB of GDDR5 memory on a 128-bit bus, with a bandwidth of 64.00 GB/s. The memory clock is 1000 MHz, rated at 4 Gbps effective.

Q: What is the memory configuration of the Intel UHD Graphics P750?

A: The Intel UHD Graphics P750 uses system shared memory, with a system-dependent bandwidth. Its memory size, type, and bus width are all listed as System Shared or System Dependent.

Q: What are the DirectX and OpenGL versions supported by both GPUs?

A: Both the Intel UHD Graphics P750 and the AMD Radeon HD 8790M support DirectX 12 (with the Intel part supporting 12_1 and the AMD part supporting 11_1) and OpenGL 4.6. The Intel part supports Vulkan 1.4, while the AMD part supports Vulkan 1.2.170.