AMD Radeon HD 7730M vs AMD Radeon RX 6400 Comparison

FAQ

Q: Which GPU has the higher Geekbench OpenCL score?

A: The AMD Radeon RX 6400 scores 32,011 in Geekbench OpenCL, while the AMD Radeon HD 7730M scores 6,581. The RX 6400 leads by 79.4% in this benchmark.

Q: How do the two GPUs compare in transistor density?

A: The RX 6400 uses a 6 nm process with 5,400 million transistors on a 107 mm² die, yielding 50.5M transistors per mm². The HD 7730M uses a 28 nm process with 1,500 million transistors on a 123 mm² die, yielding 12.2M transistors per mm².

Q: What is the memory configuration difference?

A: The RX 6400 has 4 GB of GDDR6 memory on a 64-bit bus with 128.0 GB/s bandwidth. The HD 7730M has 2 GB of DDR3 memory on a 128-bit bus with 28.80 GB/s bandwidth.

Q: Which GPU has higher pixel and texture rates?

A: The RX 6400 achieves 74.27 GPixel/s pixel rate and 111.4 GTexel/s texture rate. The HD 7730M achieves 10.80 GPixel/s and 21.60 GTexel/s respectively.

Q: What API support levels do the two GPUs offer?

A: The RX 6400 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. The HD 7730M supports DirectX 12 (11_1), OpenGL 4.6, and Vulkan 1.2.170.

Q: What are the power requirements?

A: The RX 6400 has a TDP of 53 W and a suggested PSU of 250 W, with no power connectors needed. The HD 7730M has a TDP of 25 W.

The Verdict

The data points to a clear generational leap. The AMD Radeon RX 6400 outperforms the AMD Radeon HD 7730M in the only shared benchmark, Geekbench OpenCL, by a massive margin — 32,011 versus 6,581, a 79.4% difference. Anyone seeking modern gaming or compute performance should choose the RX 6400 without hesitation.

The HD 7730M is an end-of-life mobile chip from 2012, with GCN 1.0 architecture, 28 nm process, and DDR3 memory. Its 38th percentile ranking among all GPUs puts it near peers like the Intel UHD Graphics P750 (0.4% ahead) and AMD Radeon R7 M460 (0.5% behind). It remains relevant only for legacy systems or basic 2D workloads.

The RX 6400, despite being end-of-life as well, offers RDNA 2.0 architecture, 6 nm process, GDDR6 memory, and ray tracing cores. Its 35th percentile ranking places it alongside the NVIDIA GeForce GTX 770M (0% delta) and AMD FirePro W4100 (0.2% delta). The average benchmark score of 6,001 across ten tests reflects broader capability, even though its percentile is slightly lower than the HD 7730M's 38.

For gaming, compute, or any modern workload, the RX 6400 is the only rational choice. The HD 7730M should be reserved for vintage hardware collections or extremely low-power embedded use cases.

Head-to-Head Benchmarks

The head-to-head comparison contains one benchmark: Geekbench OpenCL. The RX 6400 scores 32,011, while the HD 7730M scores 6,581. The delta is -79.4% from the RX 6400's perspective, meaning the HD 7730M trails by over three-quarters of the RX 6400's performance.

This single result encapsulates the entire story. In raw compute throughput, the RX 6400's 3.565 TFLOPS FP32 dwarfs the HD 7730M's 691.2 GFLOPS — a fivefold difference. The RX 6400's shading units number 768 versus 512, its TMUs 48 versus 32, and its ROPs 32 versus 16. Every hardware resource scales in the RX 6400's favor.

The RX 6400 also shows strength in its own benchmark suite. Its PassMark G3D score of 7,673 and GPU compute score of 2,812 indicate solid general-purpose performance. Its Geekbench Vulkan score of 16,372 demonstrates modern API efficiency. The 3DMark Steel Nomad DX12 score of 176, while modest in absolute terms, confirms DirectX 12 Ultimate support.

The HD 7730M has no additional benchmarks beyond Geekbench OpenCL. Its single score of 6,581 places it within 1.4% of the NVIDIA GeForce GT 555M and 1% of the NVIDIA GeForce GTX 670M. These rivals represent the mobile GPU landscape of its era — the HD 7730M was competitive among its contemporaries but cannot bridge the decade-long gap to the RX 6400.

Specification Differences

The two GPUs differ across nearly every specification field. The RX 6400 belongs to the Radeon RX 6000 series with the Navi 24 chip, while the HD 7730M uses the Chelsea chip from the London (HD 7700M) generation.

Clock speeds show the largest gap. The RX 6400 runs at 1,923 MHz base, 2,321 MHz boost, and 2,039 MHz game clock. The HD 7730M runs at 575 MHz base and 675 MHz boost. Memory clocks differ similarly: 2,000 MHz (16 Gbps effective) versus 900 MHz (1,800 Mbps effective).

Memory configuration favors the RX 6400 with 4 GB GDDR6 versus 2 GB DDR3. Bus width favors the HD 7730M at 128-bit versus 64-bit, but bandwidth reverses this — the RX 6400's 128.0 GB/s is over four times the HD 7730M's 28.80 GB/s.

The RX 6400 has 768 shading units, 48 TMUs, 32 ROPs, and 12 ray tracing cores. The HD 7730M has 512 shading units, 32 TMUs, and 16 ROPs, with no ray tracing cores.

Process technology differs dramatically: 6 nm TSMC for the RX 6400 versus 28 nm TSMC for the HD 7730M. Transistor counts are 5,400 million versus 1,500 million, with die sizes of 107 mm² versus 123 mm².

Power and physical specs: the RX 6400 has 53 W TDP, single-slot form factor, no power connectors, and a 250 W suggested PSU. The HD 7730M has 25 W TDP with portable device dependent display outputs.

Bus interfaces: PCIe 4.0 x4 for the RX 6400 versus PCIe 2.0 x16 for the HD 7730M. Display outputs: the RX 6400 offers 1x HDMI 2.1 and 1x DisplayPort 1.4a; the HD 7730M is portable device dependent.

The RX 6400 launched on 2022-01-18 with a launch MSRP of 159 USD. The HD 7730M launched on 2012-04-23.

Architecture Differences

The RX 6400 uses RDNA 2.0 architecture from the Navi II (RX 6000) generation. The HD 7730M uses GCN 1.0 architecture from the London (HD 7700M) generation. This represents two fundamentally different GPU design philosophies separated by a decade of evolution.

RDNA 2.0 is a modern gaming architecture with 12 dedicated ray tracing cores, enabling hardware-accelerated ray tracing effects. GCN 1.0 has no ray tracing support. The RX 6400 also supports DirectX 12 Ultimate (12_2), the latest API feature level, while the HD 7730M only reaches DirectX 12 (11_1).

Vulkan support also differs: the RX 6400 supports Vulkan 1.4, while the HD 7730M supports 1.2.170. Both support OpenGL 4.6.

The 6 nm process node gives the RX 6400 a transistor density of 50.5M per mm², more than four times the HD 7730M's 12.2M per mm². This density enables the RX 6400 to pack 5,400 million transistors into a smaller die (107 mm² versus 123 mm²).

The RX 6400's FP16 throughput of 7.130 TFLOPS (2:1 ratio) indicates it can process half-precision workloads efficiently, a feature absent from the HD 7730M's specifications. The RX 6400's FP32 of 3.565 TFLOPS represents a fivefold increase over the HD 7730M's 691.2 GFLOPS.

Memory architecture differs fundamentally: GDDR6 with 16 Gbps effective speed versus DDR3 with 1,800 Mbps effective speed. The RX 6400's narrower 64-bit bus is compensated by much faster memory, achieving 128.0 GB/s versus 28.80 GB/s.

Where Each One Wins

The RX 6400 wins in every measurable category from the data. In the only direct comparison, Geekbench OpenCL, it dominates with 32,011 versus 6,581. Its compute specifications — 3.565 TFLOPS FP32, 768 shading units, 48 TMUs, 32 ROPs — all exceed the HD 7730M's corresponding values.

Modern gaming workloads favor the RX 6400. Its DirectX 12 Ultimate support and 12 ray tracing cores enable contemporary rendering techniques that the HD 7730M cannot handle. The RX 6400's 4 GB GDDR6 memory with 128.0 GB/s bandwidth supports higher resolutions and texture quality than the HD 7730M's 2 GB DDR3.

The RX 6400's PCIe 4.0 x4 interface provides substantially more bandwidth to the CPU than the HD 7730M's PCIe 2.0 x16, benefiting data-intensive tasks like texture streaming and compute offload.

The HD 7730M's one advantage is power efficiency — 25 W TDP versus 53 W TDP. This makes it suitable for ultra-low-power systems where the RX 6400's power draw would be prohibitive. Its 128-bit memory bus, while paired with slow DDR3, offers wider addressability per clock.

Use cases for the HD 7730M are limited to legacy systems, basic display output, or extremely constrained power envelopes. The RX 6400 serves gamers, content creators, and compute users who need modern API support and performance within a 53 W envelope. The RX 6400 is the clear choice for any workload beyond the most basic tasks.