AMD Radeon HD 8750M vs AMD Radeon RX 6400 Comparison

FAQ

Q: How do the two GPUs compare in overall average benchmark score?

A: The AMD Radeon RX 6400 has an average benchmark score of 6001, while the AMD Radeon HD 8750M scores 5970. The RX 6400 sits at the 35th percentile of all GPUs, and the HD 8750M is at the 34th percentile.

Q: Which GPU wins in the only shared head-to-head benchmark?

A: The RX 6400 wins the Geekbench OpenCL test with a score of 32011 against the HD 8750M’s 5970, a delta of 436.2%. This is the only benchmark where both GPUs have recorded scores.

Q: What are the nearest rivals for each card based on average score?

A: The RX 6400’s closest rival is the NVIDIA GeForce GTX 770M, with an average score of 6000 and a delta of 0%. The HD 8750M’s nearest rival is the AMD Radeon HD 8730M, scoring 5955 with a delta of 0.3%.

Q: How do the memory subsystems differ between the two?

A: The RX 6400 uses 4 GB of GDDR6 on a 64-bit bus with 128.0 GB/s bandwidth. The HD 8750M uses 1024 MB of DDR3 on a 128-bit bus with 28.80 GB/s bandwidth.

Q: What are the architectural generations and process nodes?

A: The RX 6400 is built on RDNA 2.0 with a 6 nm process, while the HD 8750M uses GCN 1.0 on a 28 nm process. Both are manufactured by TSMC.

Q: Do both cards support the same DirectX version?

A: No. The RX 6400 supports DirectX 12 Ultimate (12_2), whereas the HD 8750M supports DirectX 12 (11_1). Vulkan support is 1.4 on the RX 6400 versus 1.2.170 on the HD 8750M.

Architecture Differences

The RX 6400 is built on the RDNA 2.0 architecture, the second generation of AMD’s Navi design, fabricated on a 6 nm process at TSMC. It integrates 5,400 million transistors on a 107 mm² die, yielding a transistor density of 50.5 million per square millimeter. The chip is named Navi 24 and belongs to the Navi II generation within the Radeon RX 6000 series. Its predecessor is Navi, and its successor is Navi III.

In contrast, the HD 8750M uses the older GCN 1.0 architecture, with the chip codenamed Mars. It is built on a 28 nm process at TSMC, packing 950 million transistors on a 77 mm² die, for a density of 12.3 million per square millimeter. It belongs to the Solar System generation (HD 8700M), with the predecessor London and successor Gem System.

The RX 6400 features 768 shading units, 48 texture mapping units, and 32 ROPs, along with 12 ray tracing cores. The HD 8750M has 384 shading units, 24 TMUs, and 8 ROPs, with no ray tracing cores. The RX 6400’s clock speeds are substantially higher: a base of 1923 MHz, boost of 2321 MHz, and a game clock of 2039 MHz, versus the HD 8750M’s base of 775 MHz and boost of 825 MHz. Memory clocks differ as well — the RX 6400 runs at 2000 MHz (16 Gbps effective), while the HD 8750M runs at 900 MHz (1800 Mbps effective).

The RX 6400 also brings hardware ray tracing support, a feature entirely absent from the HD 8750M. API support diverges with DirectX 12 Ultimate and Vulkan 1.4 on the RX 6400, versus DirectX 12 (11_1) and Vulkan 1.2.170 on the HD 8750M. Both support OpenGL 4.6. The RX 6400 is a discrete single-slot card with no power connectors and a 53 W TDP, while the HD 8750M’s TDP and slot width are not specified in the data.

The Verdict

The data points to a decisive generational leap. The RX 6400 delivers an average benchmark score of 6001, only 0.5% higher than the HD 8750M’s 5970 in the overall average, but that narrow margin is misleading because the two cards only share one benchmark. In that shared test — Geekbench OpenCL — the RX 6400 scores 32011 versus 5970, a 436.2% advantage. This is not a close contest.

For users seeking modern features, the RX 6400 is the only choice with ray tracing cores, DirectX 12 Ultimate support, and a 6 nm process. The HD 8750M is a legacy part from 2013, with no ray tracing, a 28 nm process, and only 1 GB of DDR3 memory. The RX 6400’s 4 GB of GDDR6 memory with 128.0 GB/s bandwidth versus the HD 8750M’s 1 GB DDR3 with 28.80 GB/s bandwidth underscores the performance gap.

The RX 6400’s nearest rival is the NVIDIA GeForce GTX 770M with a delta of 0%, meaning the RX 6400 essentially matches that mobile GPU. The HD 8750M’s nearest rival is the AMD Radeon HD 8730M with a 0.3% delta, showing it is a mid-range part from its era. The RX 6400’s percentile rank of 35 versus the HD 8750M’s 34 places both in the lower half of all GPUs, but the RX 6400 does so with far more modern architecture and capabilities.

Pick the RX 6400 if you need current API support, ray tracing, or play modern titles. Pick the HD 8750M only if you are constrained to legacy hardware or drivers — the data shows no performance reason to choose it.

Specification Differences

The two GPUs differ across nearly every hardware specification in the FACT PACK.

• Process Node: RX 6400 is 6 nm; HD 8750M is 28 nm.
• Transistors: RX 6400 has 5,400 million; HD 8750M has 950 million.
• Die Size: RX 6400 is 107 mm²; HD 8750M is 77 mm².
• Transistor Density: RX 6400 is 50.5M / mm²; HD 8750M is 12.3M / mm².
• Base Clock: RX 6400 is 1923 MHz; HD 8750M is 775 MHz.
• Boost Clock: RX 6400 is 2321 MHz; HD 8750M is 825 MHz.
• Game Clock: RX 6400 is 2039 MHz; HD 8750M has none listed.
• Memory Clock: RX 6400 is 2000 MHz (16 Gbps effective); HD 8750M is 900 MHz (1800 Mbps effective).
• Memory Size: RX 6400 is 4 GB; HD 8750M is 1024 MB.
• Memory Type: RX 6400 is GDDR6; HD 8750M is DDR3.
• Memory Bus Width: RX 6400 is 64 bit; HD 8750M is 128 bit.
• Memory Bandwidth: RX 6400 is 128.0 GB/s; HD 8750M is 28.80 GB/s.
• Shading Units: RX 6400 has 768; HD 8750M has 384.
• TMUs: RX 6400 has 48; HD 8750M has 24.
• ROPs: RX 6400 has 32; HD 8750M has 8.
• Ray Tracing Cores: RX 6400 has 12; HD 8750M has none.
• Pixel Rate: RX 6400 is 74.27 GPixel/s; HD 8750M is 6.600 GPixel/s.
• Texture Rate: RX 6400 is 111.4 GTexel/s; HD 8750M is 19.80 GTexel/s.
• FP32 Performance: RX 6400 is 3.565 TFLOPS; HD 8750M is 633.6 GFLOPS.
• FP16 Performance: RX 6400 is 7.130 TFLOPS (2:1); HD 8750M has none listed.
• TDP: RX 6400 is 53 W; HD 8750M has none listed.
• Bus Interface: RX 6400 is PCIe 4.0 x4; HD 8750M is PCIe 3.0 x8.
• Display Outputs: RX 6400 has 1x HDMI 2.1 and 1x DisplayPort 1.4a; HD 8750M has none listed.
• DirectX Support: RX 6400 is 12 Ultimate (12_2); HD 8750M is 12 (11_1).
• Vulkan Support: RX 6400 is 1.4; HD 8750M is 1.2.170.
• Release Date: RX 6400 is 2022-01-18; HD 8750M is 2013-02-25.
• Launch MSRP: RX 6400 has a launch MSRP of 159 USD; HD 8750M has none listed.

Head-to-Head Benchmarks

The single recorded head-to-head benchmark is Geekbench OpenCL. The RX 6400 scores 32011, while the HD 8750M scores 5970, giving the RX 6400 a 436.2% advantage. This is a massive margin, reflecting the architectural and clock-speed differences between the two.

The RX 6400 also has a broader benchmark profile. It records scores in 3DMark Steel Nomad (DX12) at 176, Geekbench Vulkan at 16372, and multiple Passmark tests: DirectX 10 at 54, DirectX 11 at 70, DirectX 12 at 30, DirectX 9 at 93, G2D at 722, G3D at 7673, and GPU Compute at 2812. The HD 8750M has only the Geekbench OpenCL score of 5970 in its recorded data.

In the Passmark G3D test, the RX 6400’s score of 7673 is far above its own average of 6001, while its DirectX 9 score of 93 and G2D score of 722 indicate strong 2D and legacy API performance. The Geekbench Vulkan score of 16372 shows modern API efficiency, whereas the HD 8750M has no Vulkan benchmark recorded.

The RX 6400’s FP32 throughput of 3.565 TFLOPS is over five times the HD 8750M’s 633.6 GFLOPS. Its texture rate of 111.4 GTexel/s dwarfs the HD 8750M’s 19.80 GTexel/s, and its pixel rate of 74.27 GPixel/s is more than eleven times the HD 8750M’s 6.600 GPixel/s. These raw throughput numbers align with the benchmark gap.

Memory bandwidth tells a similar story: 128.0 GB/s on the RX 6400 versus 28.80 GB/s on the HD 8750M, a 4.4x difference that directly impacts texture-heavy workloads. The RX 6400’s 4 GB VRAM capacity also prevents the sort of capacity stutters that 1 GB parts like the HD 8750M would hit in modern games.

In terms of rival positioning, the RX 6400’s nearest rival is the GTX 770M at a 0% delta, meaning they are statistically tied in average score. The HD 8750M’s nearest rival is the HD 8730M at a 0.3% delta, also a near tie. This places both cards in similar company overall, but the RX 6400 achieves that standing with far newer hardware and a higher feature set. The wins tally is 1 for the RX 6400 and 0 for the HD 8750M in head-to-head tests, and every metric in the FACT PACK that shows a numerical comparison favors the RX 6400.