AMD Instinct MI300 vs AMD Radeon RX 7700 Comparison

Architecture Differences

The AMD Instinct MI300 and AMD Radeon RX 7700 represent two fundamentally different design philosophies from the same manufacturer, built on the same 5 nm TSMC process node but diverging sharply in every architectural priority.

The Instinct MI300 uses the CDNA 3.0 architecture, purpose-built for compute acceleration rather than graphics rendering. Its chip, codenamed Aqua Vanjaram, packs 153,000 million transistors across a massive 1017 mm² die, yielding a transistor density of 150.4M per mm². The RX 7700, by contrast, uses the RDNA 3.0 architecture with the Navi 32 chip, containing 28,100 million transistors on a 346 mm² die at 81.2M per mm². The density gap reflects the MI300's dense compute arrays versus the RX 7700's more balanced graphics pipeline.

Memory configurations could not be more different. The MI300 carries 128 GB of HBM3 across an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The RX 7700 uses 16 GB of GDDR6 on a 256-bit bus, providing 624.1 GB/s. That is an 8.5x difference in memory capacity and a bandwidth advantage of roughly 8.5x for the Instinct part. The memory clock rates also differ: the MI300 runs memory at 1300 MHz (5.2 Gbps effective), while the RX 7700 runs at 2438 MHz (19.5 Gbps effective), yet the MI300's enormous bus width completely overwhelms the RX 7700's faster per-pin signaling.

Compute resources follow the same pattern. The MI300 contains 14,080 shading units, 880 texture mapping units, and zero raster output pipelines. The RX 7700 has 2,560 shading units, 160 TMUs, and 96 ROPs. The MI300 also omits dedicated ray tracing cores, while the RX 7700 includes 40 RT cores. The MI300's pixel rate is listed as 0 MPixel/s, since it has no display outputs, while the RX 7700 achieves 236.1 GPixel/s. Texture rates are 1,496.0 GTexel/s for the MI300 versus 393.4 GTexel/s for the RX 7700.

Peak compute figures show the MI300's raw throughput advantage. FP32 performance is 47.87 TFLOPS for the Instinct part versus 25.18 TFLOPS for the RX 7700. FP16 performance mirrors this at 47.87 TFLOPS (1:1) versus 25.18 TFLOPS (1:1). The MI300 does not expose DirectX, OpenGL, or Vulkan APIs, reflecting its non-graphics role, while the RX 7700 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Power requirements diverge dramatically. The MI300 has a 600 W TDP with a suggested 1000 W power supply, while the RX 7700 draws 200 W and suggests a 550 W PSU. Both use 2x 8-pin power connectors. Physical dimensions show the MI300 at 267 mm length and 111 mm height, while the RX 7700 measures 267 mm length, 135 mm height, and 50 mm width in a dual-slot form factor. The MI300 has no display outputs; the RX 7700 offers 1x HDMI 2.1, 2x DisplayPort 2.1, and 1x USB Type-C. Bus interfaces also differ: PCIe 5.0 x16 for the MI300 versus PCIe 4.0 x16 for the RX 7700.

The Verdict

The recorded data draws a clear line between these two accelerators. The AMD Instinct MI300 is a compute-oriented part with no graphics pipeline, no display outputs, and no consumer API support. It delivers 47.87 TFLOPS of FP32 throughput, 128 GB of HBM3 memory with 5.32 TB/s bandwidth, and consumes 600 W. The AMD Radeon RX 7700 is a conventional graphics card with 25.18 TFLOPS FP32, 16 GB GDDR6, 624.1 GB/s bandwidth, full DirectX 12 Ultimate support, and a 200 W TDP.

Benchmark data exists only for the RX 7700, which sits in the 58th percentile of all GPUs in the database. Its average benchmark score is 15,852, placing it within 1.7% of the NVIDIA GeForce RTX 3060 Ti (16,129), within 1% of the AMD Radeon RX 9060 (16,014), and effectively tied with the AMD Radeon R9 370X (15,862, delta -0.1%). The Pro W5500 trails by 1.1% at 15,679. No benchmark scores exist for the MI300, which sits at the 50th percentile with an average score of zero, meaning direct numerical comparison is impossible.

For users needing graphics output, gaming, or consumer API support, the RX 7700 is the only viable option from this pair. Its 40 RT cores and 96 ROPs enable rendering workloads, and its display connectivity supports standard monitors. For compute workloads that require massive memory capacity and bandwidth, the MI300 is purpose-built, but the absence of display outputs and consumer API compatibility restricts it to server or accelerator roles. The data shows no overlap in intended use cases, and the choice follows the workload rather than performance preference.

FAQ

Q: Which GPU has higher FP32 compute performance?

A: The AMD Instinct MI300 delivers 47.87 TFLOPS of FP32 throughput, while the AMD Radeon RX 7700 delivers 25.18 TFLOPS. The MI300 leads by roughly 1.9x.

Q: Can the Instinct MI300 be used for gaming?

A: No. The MI300 has no display outputs, a pixel rate of 0 MPixel/s, and does not support DirectX, OpenGL, or Vulkan APIs. The RX 7700 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: How do memory capacities and bandwidth compare?

A: The MI300 offers 128 GB of HBM3 on an 8192-bit bus with 5.32 TB/s bandwidth. The RX 7700 offers 16 GB of GDDR6 on a 256-bit bus with 624.1 GB/s bandwidth.

Q: What is the power consumption difference?

A: The MI300 has a 600 W TDP and suggests a 1000 W power supply. The RX 7700 has a 200 W TDP and suggests a 550 W power supply. Both use 2x 8-pin connectors.

Q: How does the RX 7700 compare to its nearest rivals?

A: The RX 7700's average benchmark score of 15,852 puts it within 0.1% of the Radeon R9 370X (15,862), within 1% of the RX 9060 (16,014), 1.1% ahead of the Radeon Pro W5500 (15,679), and 1.7% behind the GeForce RTX 3060 Ti (16,129).

Q: What are the transistor counts and die sizes?

A: The MI300 contains 153,000 million transistors on a 1017 mm² die. The RX 7700 contains 28,100 million transistors on a 346 mm² die. Both use a 5 nm process from TSMC.

Specification Differences

The two accelerators differ across nearly every specification field in the database. The MI300 uses the CDNA 3.0 architecture with the Aqua Vanjaram chip, while the RX 7700 uses RDNA 3.0 with the Navi 32 chip. The MI300 belongs to the Instinct (MIx) generation; the RX 7700 belongs to the Navi III (RX 7000) series.

Transistor counts are 153,000 million versus 28,100 million, and die sizes are 1017 mm² versus 346 mm². Transistor density is 150.4M per mm² for the MI300 and 81.2M per mm² for the RX 7700. Base clocks are 1000 MHz versus 1900 MHz; boost clocks are 1700 MHz versus 2459 MHz. The RX 7700 also lists a game clock of 2041 MHz, while the MI300 has none.

Memory specifications differ completely: 128 GB HBM3 with 8192-bit bus and 5.32 TB/s bandwidth versus 16 GB GDDR6 with 256-bit bus and 624.1 GB/s bandwidth. Memory clocks are 1300 MHz (5.2 Gbps effective) versus 2438 MHz (19.5 Gbps effective). Shading units number 14,080 versus 2,560; TMUs number 880 versus 160; ROPs are 0 versus 96. The RX 7700 has 40 RT cores; the MI300 has none.

Pixel rates are 0 MPixel/s versus 236.1 GPixel/s; texture rates are 1,496.0 GTexel/s versus 393.4 GTexel/s. FP32 is 47.87 TFLOPS versus 25.18 TFLOPS; FP16 is likewise 47.87 TFLOPS versus 25.18 TFLOPS. TDP is 600 W versus 200 W. Suggested PSU is 1000 W versus 550 W. The MI300 has no slot width listed; the RX 7700 is dual-slot. Power connectors are identical at 2x 8-pin.

Bus interfaces are PCIe 5.0 x16 versus PCIe 4.0 x16. Display outputs are absent on the MI300, while the RX 7700 provides 1x HDMI 2.1, 2x DisplayPort 2.1, and 1x USB Type-C. API support is entirely absent on the MI300; the RX 7700 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. Dimensions differ in height and width: the MI300 is 267 mm by 111 mm, while the RX 7700 is 267 mm by 135 mm by 50 mm. Release dates are 2023-01-03 for the MI300 and 2025-09-17 for the RX 7700. The MI300 lists no production status; the RX 7700 is active. The MI300's predecessor is Radeon Instinct; the RX 7700's predecessor is Navi II, and its successor is Navi IV.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries for these two products, and the MI300 has no individual benchmark scores recorded. The RX 7700, however, has nine benchmark results that establish its performance profile.

In 3DMark Steel Nomad DX12, the RX 7700 scores 2,865. Geekbench OpenCL shows 106,028. Passmark results are as follows: DirectX 10 scores 92, DirectX 11 scores 186, DirectX 12 scores 96, DirectX 9 scores 261, G2D scores 1,206, G3D scores 20,974, and GPU Compute scores 10,963. The average benchmark score across these tests is 15,852.

The MI300's absence from benchmark records means the database cannot produce a direct numerical comparison. The nearest rivals for the RX 7700 provide context. The GeForce RTX 3060 Ti averages 16,129, which is 1.7% ahead of the RX 7700. The Radeon RX 9060 averages 16,014, which is 1% ahead. The Radeon R9 370X averages 15,862, effectively tied at -0.1% delta. The Radeon Pro W5500 averages 15,679, which is 1.1% behind.

These deltas indicate the RX 7700 sits in a tight competitive band among its nearest rivals, with no single competitor holding a decisive edge. The RX 7700's 58th percentile ranking among all GPUs places it in the upper half of the database, and its average score of 15,852 reflects consistent performance across graphics and compute workloads. The MI300's 50th percentile ranking with zero benchmark scores suggests it has not been subjected to the same testing suite, likely due to its non-graphics nature and lack of consumer API support.