AMD Radeon RX 6400 vs Intel UHD Graphics P750 Comparison

Intel UHD Graphics P750 is an integrated graphics solution built into Rocket Lake processors, while the AMD Radeon RX 6400 is a discrete single-slot card from the Radeon RX 6000 series. The benchmark data shows a stark performance gap: the RX 6400 delivers a Geekbench OpenCL score of 32,011 against the P750’s 6,554, a 79.5% deficit for the Intel part. The RX 6400 wins the sole head-to-head test, and the P750’s nearest rivals are older mobile GPUs like the AMD Radeon HD 7730M and NVIDIA GeForce GTX 670M, while the RX 6400 trades blows with the NVIDIA GeForce GTX 770M and AMD FirePro W4100.

The Verdict

The data is unambiguous: the AMD Radeon RX 6400 is the superior performer for any graphics-intensive workload. Its Geekbench OpenCL score of 32,011 is nearly five times the Intel UHD Graphics P750’s 6,554, a 79.5% lead in the only shared benchmark. The RX 6400 also posts a Passmark G3D score of 7,673, while the P750 has no equivalent result in the pack. For gaming, rendering, or GPU compute, the RX 6400 is the only viable choice between these two.

The Intel UHD Graphics P750 is for systems where a discrete GPU is impossible or unnecessary. Its 15 W TDP and integrated design mean it draws minimal power and requires no expansion slot. The data shows it sits at the 38th percentile of all GPUs, just behind the AMD Radeon HD 7730M (6,581, -0.4%) and slightly ahead of the NVIDIA GeForce GT 555M (6,493, 0.9%). This places it in the range of decade-old mobile discrete parts, making it suitable only for basic desktop tasks, legacy software, or as a fallback display adapter.

The RX 6400, at the 35th percentile, has a lower percentile ranking despite vastly higher raw scores, indicating the benchmark distribution is skewed by high-end cards. Its nearest rivals include the NVIDIA GeForce GTX 770M (6,000, 0% delta) and the NVIDIA RTX PRO 6000 Blackwell Server (5,996, 0.1%), which are all within 0.3% of its average score of 6,001. This suggests the RX 6400 is competitive with mid-range mobile GPUs from several generations ago, but the OpenCL result shows it far outstrips the P750. Choose the RX 6400 for any real GPU work; choose the P750 only when power and space constraints dominate.

Architecture Differences

The two GPUs come from entirely different design philosophies. The Intel UHD Graphics P750 is built on Intel’s Generation 12.1 architecture, using a 14 nm+++ process node at Intel’s foundry, and is integrated into the Rocket Lake chip. It has 256 shading units, 64 texture mapping units, and 32 ROPs, with a base clock of 350 MHz and a boost clock of 1300 MHz. Its memory is system shared, with a bus width and type also marked as system shared, and bandwidth is system dependent. The P750’s FP32 throughput is 665.6 GFLOPS, with FP16 at 1,331.2 GFLOPS (2:1). It supports DirectX 12 (12_1), OpenGL 4.6, and Vulkan 1.4, but has no dedicated ray tracing or tensor cores listed.

The AMD Radeon RX 6400 uses RDNA 2.0 architecture on a 6 nm process from TSMC, with 5,400 million transistors on a 107 mm² die, giving a transistor density of 50.5M per mm². It has 768 shading units, 48 TMUs, and 32 ROPs, plus 12 ray tracing cores. Its clocks are far higher: a base of 1923 MHz, a game clock of 2039 MHz, and a boost of 2321 MHz. Memory is 4 GB of GDDR6 on a 64-bit bus, delivering 128.0 GB/s bandwidth, with a memory clock of 2000 MHz (16 Gbps effective). The RX 6400’s FP32 is 3.565 TFLOPS and FP16 is 7.130 TFLOPS (2:1). It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The architectural gap is massive. The RX 6400 has three times the shading units, roughly 5.4 times the FP32 throughput, and 128.0 GB/s of dedicated memory bandwidth versus the P750’s system dependent shared memory. The RX 6400 also has dedicated ray tracing hardware, which the P750 lacks entirely. The process node difference—6 nm versus 14 nm+++—explains the clock speed advantage: the RX 6400 boosts at 2321 MHz versus the P750’s 1300 MHz. The RX 6400’s TDP of 53 W is higher than the P750’s 15 W, but it is still a low-power card that requires no power connectors and runs on a 250 W suggested PSU. The P750 uses a Ring Bus interface, while the RX 6400 uses PCIe 4.0 x4.

Where Each One Wins

The AMD Radeon RX 6400 wins every measurable benchmark category in this comparison. In Geekbench OpenCL, it scores 32,011 versus the P750’s 6,554, a 79.5% delta. The RX 6400 also has results in Vulkan (16,372), Passmark G3D (7,673), and Passmark GPU Compute (2,812), none of which the P750 has data for. For DirectX workloads, the RX 6400 shows Passmark scores of 93 in DirectX 9, 70 in DirectX 11, 54 in DirectX 10, and 30 in DirectX 12, plus a G2D score of 722. These numbers indicate the RX 6400 handles legacy and modern APIs alike, with the DirectX 9 result being the strongest relative to the rest of its Passmark suite.

The Intel UHD Graphics P750 has no benchmark wins. Its only score is the Geekbench OpenCL result of 6,554, which places it 38th percentile overall. Its nearest rivals—AMD Radeon HD 7730M (6,581, -0.4%), AMD Radeon R7 M460 (6,612, -0.9%), NVIDIA GeForce GTX 670M (6,513, 0.6%), and NVIDIA GeForce GT 555M (6,493, 0.9%)—are all within 1% of its score. This means the P750 is effectively equivalent to those older mobile parts, but it has no edge over the RX 6400 in any test. The P750’s only advantage is qualitative: it is an IGP with a 15 W TDP, meaning it consumes far less power than the RX 6400’s 53 W and requires no PCIe slot or power connector. For a system that must run on integrated graphics alone, the P750 is the only option here, but for any performance metric, the RX 6400 wins outright.

FAQ

Q: Which GPU has a higher Geekbench OpenCL score?

A: The AMD Radeon RX 6400 scores 32,011, which is 79.5% higher than the Intel UHD Graphics P750’s 6,554.

Q: Does the Intel UHD Graphics P750 support ray tracing?

A: No. The P750 has no ray tracing cores listed in its specs. The AMD Radeon RX 6400 has 12 ray tracing cores.

Q: What is the memory configuration of each GPU?

A: The Intel UHD Graphics P750 uses system shared memory with system dependent bandwidth. The AMD Radeon RX 6400 has 4 GB of GDDR6 on a 64-bit bus with 128.0 GB/s bandwidth.

Q: How does the RX 6400 compare to its nearest rivals?

A: The RX 6400’s average benchmark score is 6,001, with nearest rivals including the NVIDIA GeForce GTX 770M (6,000, 0% delta) and NVIDIA RTX PRO 6000 Blackwell Server (5,996, 0.1% delta).

Q: What is the TDP difference between the two?

A: The Intel UHD Graphics P750 has a TDP of 15 W, while the AMD Radeon RX 6400 has a TDP of 53 W. The RX 6400 also has a suggested PSU of 250 W.

Q: Which API versions does each GPU support?

A: Both support OpenGL 4.6 and Vulkan 1.4. The P750 supports DirectX 12 (12_1), while the RX 6400 supports DirectX 12 Ultimate (12_2).

Head-to-Head Benchmarks

The only direct benchmark comparison in the data is Geekbench OpenCL, and it is a decisive win for the AMD Radeon RX 6400. The RX 6400 scores 32,011 against the Intel UHD Graphics P750’s 6,554, a delta of -79.5% from the perspective of the Intel part. That means the RX 6400 is roughly 4.9 times faster in this test. This single result tells the story: the P750 is built for basic display output and light compute, while the RX 6400 is a real GPU capable of meaningful workloads.

Beyond the shared test, the RX 6400 has a suite of additional benchmarks that the P750 lacks entirely. Its Vulkan score of 16,372 indicates strong performance in cross-platform graphics APIs. The Passmark G3D score of 7,673 is its highest overall in the Passmark suite, followed by G2D at 722, DirectX 9 at 93, DirectX 11 at 70, DirectX 10 at 54, and DirectX 12 at 30. The GPU compute score of 2,812 shows that the RX 6400 handles compute tasks as well as graphics. The P750 has no equivalent results, so the RX 6400 wins by default in every one of these categories.

The delta between the two GPUs is stark even when considering their percentile rankings. The P750 sits at the 38th percentile of all GPUs, while the RX 6400 is at the 35th percentile. This counterintuitive result arises because the RX 6400’s average benchmark score of 6,001 is pulled down by its weaker Passmark DirectX scores (30 in DirectX 12, for example), whereas the P750 has only one high-relative score. In practical terms, the RX 6400’s OpenCL lead is the most representative comparison of raw compute power, and it shows an overwhelming advantage for the AMD card. The RX 6400’s nearest rival, the NVIDIA GeForce GTX 770M, matches its average score exactly at 6,000, but even that rival cannot match the RX 6400’s OpenCL result. The P750’s nearest rivals are all within 1% of its score, confirming that it belongs in the same class as those older mobile GPUs, not alongside the RX 6400.