AMD Instinct MI300X vs NVIDIA GeForce RTX 4070 Comparison

# AMD Instinct MI300X vs NVIDIA GeForce RTX 4070: Data Analysis

The Verdict

The benchmark database shows two accelerators built for fundamentally different roles. The AMD Instinct MI300X is a compute-first accelerator with a single recorded Geekbench OpenCL score of 317,994, placing it in the 100th percentile of all GPUs tracked. The NVIDIA GeForce RTX 4070, by contrast, posts an average benchmark score of 37,648 across ten tests, landing in the 81st percentile. The MI300X outscores the RTX 4070 in their shared Geekbench OpenCL test by 105.3%, a decisive margin that reflects their divergent design goals.

The recorded data indicates the MI300X is the clear choice for compute workloads that scale with massive memory capacity and raw throughput. Its nearest rivals in the database are all data center accelerators: the NVIDIA H200 NVL scores 334,891 (5% higher), the NVIDIA B200 scores 345,482 (8% higher), while the NVIDIA L40S scores 295,763 (7.5% lower) and the NVIDIA RTX 6000 Ada Generation scores 287,237 (10.7% lower). The RTX 4070 sits among consumer and prosumer cards, with its nearest rivals including the NVIDIA Tesla P4 (0.1% lower), AMD Radeon RX Vega 56 (0.4% lower), and NVIDIA GeForce RTX 4080 Mobile (1.3% higher).

The RTX 4070 is the only option of the two with display outputs, DirectX 12 Ultimate support, and a dual-slot form factor, making it the relevant choice for graphics rendering, gaming, and workstation visual workloads. The MI300X has no display outputs and no graphics API support in the database, confirming its role as a compute-only processor.

Where Each One Wins

AMD Instinct MI300X wins in raw compute throughput and memory capacity. The MI300X delivers 81.72 TFLOPS of FP32 and FP16 performance, against 29.15 TFLOPS for the RTX 4070. Its memory subsystem is dramatically larger: 192 GB of HBM3 across an 8192-bit bus, yielding 5.32 TB/s of bandwidth. The RTX 4070 uses 12 GB of GDDR6X on a 192-bit bus, producing 504.2 GB/s. The MI300X also has 19,456 shading units and 1,216 texture mapping units, while the RTX 4070 has 5,888 shading units and 184 TMUs.

NVIDIA GeForce RTX 4070 wins in graphics features, display support, and efficiency per watt. The RTX 4070 has 46 ray tracing cores and 184 tensor cores, features absent from the MI300X's spec sheet. It outputs via 1x HDMI 2.1 and 3x DisplayPort 1.4a, while the MI300X provides no display outputs at all. The RTX 4070 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4; the MI300X lists N/A for all three APIs. The RTX 4070 draws 200 W versus 750 W for the MI300X, and its suggested power supply is 550 W compared to 1150 W. The RTX 4070 also fits in a dual-slot, 240 mm long, 110 mm high, 40 mm wide package, whereas the MI300X uses an OAM Module form factor.

The RTX 4070's pixel rate of 158.4 GPixel/s and texture rate of 455.4 GTexel/s stand against the MI300X's 0 MPixel/s pixel rate and 2,553.6 GTexel/s texture rate. The MI300X is built for throughput, not rasterization.

Architecture Differences

The two chips come from different architectural lineages. The MI300X uses the CDNA 3.0 architecture on the Aqua Vanjaram chip, part of the Instinct (MIx) generation. The RTX 4070 uses Ada Lovelace architecture on the AD104 chip, part of the GeForce 40 series. Both are fabricated by TSMC on a 5 nm process, but the similarities end there.

The MI300X integrates 153,000 million transistors on a 1017 mm² die, achieving a transistor density of 150.4M per mm². The RTX 4070 contains 35,800 million transistors on a 294 mm² die, with a density of 121.8M per mm². The MI300X's die is roughly 3.5 times larger in area and holds over four times the transistors.

Clock behavior differs substantially. The MI300X has a base clock of 1000 MHz and a boost clock of 2100 MHz, with memory clocked at 1300 MHz (5.2 Gbps effective). The RTX 4070 runs at 1920 MHz base and 2475 MHz boost, with memory at 1313 MHz (21 Gbps effective). The RTX 4070's higher clocks and smaller die help it achieve its higher pixel rate despite having far fewer ROPs: 64 ROPs on the RTX 4070 versus 0 ROPs listed for the MI300X.

Memory architecture is the starkest differentiator. The MI300X uses HBM3 with an 8192-bit bus and 192 GB capacity. The RTX 4070 uses GDDR6X with a 192-bit bus and 12 GB capacity. Bandwidth scales accordingly: 5.32 TB/s versus 504.2 GB/s, a 10.6x difference in favor of the MI300X.

Interface support also differs. The MI300X uses PCIe 5.0 x16, while the RTX 4070 uses PCIe 4.0 x16. Power delivery is separate: the MI300X has no power connectors (OAM modules receive power through the socket), while the RTX 4070 uses a 1x 16-pin connector.

Production status and release timing differ as well. The MI300X launched on December 5, 2023, and the RTX 4070 launched on April 11, 2023. The RTX 4070 is marked end-of-life in the database, with the GeForce 50 series as its successor. The MI300X's predecessor is listed as Radeon Instinct, with no successor recorded.

FAQ

Q: Which card has more memory?

A: The AMD Instinct MI300X has 192 GB of HBM3 memory, compared to 12 GB of GDDR6X on the NVIDIA GeForce RTX 4070. The MI300X also has a much wider 8192-bit memory bus and 5.32 TB/s bandwidth versus 504.2 GB/s.

Q: Does the MI300X support DirectX or display outputs?

A: No. The MI300X lists N/A for DirectX, OpenGL, and Vulkan support, and provides no display outputs. The RTX 4070 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, Vulkan 1.4, and has 1x HDMI 2.1 plus 3x DisplayPort 1.4a outputs.

Q: How much faster is the MI300X in the shared benchmark?

A: In Geekbench OpenCL, the MI300X scores 317,994 against 154,858 for the RTX 4070. That is a 105.3% higher score, meaning the MI300X is more than twice as fast in this compute test.

Q: What is the power consumption difference?

A: The MI300X has a TDP of 750 W and suggests a 1150 W power supply. The RTX 4070 has a TDP of 200 W and suggests a 550 W power supply. The RTX 4070 also uses a standard 1x 16-pin power connector, while the MI300X uses no connectors at all, drawing power through its OAM Module slot.

Q: How do their nearest rivals compare?

A: The MI300X's closest competitors are data center accelerators: the NVIDIA H200 NVL scores 5% higher, the B200 scores 8% higher, the L40S scores 7.5% lower, and the RTX 6000 Ada Generation scores 10.7% lower. The RTX 4070's nearest rivals include the NVIDIA Tesla P4 (0.1% lower), AMD Radeon RX Vega 56 (0.4% lower), and NVIDIA GeForce RTX 4080 Mobile (1.3% higher).

Q: Which one has more shading units and tensor cores?

A: The MI300X has 19,456 shading units and no tensor cores listed. The RTX 4070 has 5,888 shading units, 184 tensor cores, and 46 ray tracing cores. The MI300X also has 1,216 TMUs versus 184 on the RTX 4070.

Head-to-Head Benchmarks

The database contains one direct head-to-head benchmark between these two products: Geekbench OpenCL. The AMD Instinct MI300X scores 317,994, while the NVIDIA GeForce RTX 4070 scores 154,858. The MI300X wins this test with a 105.3% higher score, a margin that indicates the MI300X delivers more than double the compute performance in this OpenCL workload.

This gap is consistent with the raw specifications. The MI300X has 81.72 TFLOPS of FP32 compute versus 29.15 TFLOPS on the RTX 4070. The MI300X also has 19,456 shading units, 3.3 times the RTX 4070's 5,888, and 1,216 TMUs versus 184. The MI300X's memory bandwidth of 5.32 TB/s versus 504.2 GB/s gives it a 10.6x advantage in data throughput, which is critical for large compute workloads.

The RTX 4070, however, wins in graphics-specific metrics. Its 158.4 GPixel/s pixel rate and 455.4 GTexel/s texture rate demonstrate real rasterization capability, while the MI300X's pixel rate is listed as 0 MPixel/s. The RTX 4070 also has 64 ROPs, whereas the MI300X lists 0 ROPs. These figures confirm that the MI300X is not a graphics processor in the traditional sense, despite its far higher texture rate.

The RTX 4070's own benchmark suite shows a balanced profile across graphics and compute tests. Its highest scores come in PassMark G3D at 26,927 and Geekbench Vulkan at 174,152, with Geekbench OpenCL at 154,858. The MI300X's single score of 317,994 exceeds the RTX 4070's best recorded score in any test by a wide margin, but the RTX 4070's breadth of tests, including DirectX 9 through 12 and G2D, reflects its role as a general-purpose graphics card.

The percentile rankings reinforce the positioning. The MI300X sits at the 100th percentile of all GPUs in the database, while the RTX 4070 sits at the 81st percentile. The MI300X's nearest rivals are all high-end data center parts, and the RTX 4070's nearest rivals are a mix of older data center cards and mobile/workstation GPUs.

The data shows two products that share a manufacturer process node but diverge in nearly every other measurable dimension. The MI300X is a compute accelerator with massive memory, enormous die area, and no display or graphics API support. The RTX 4070 is a conventional graphics card with ray tracing, tensor cores, display outputs, and a dual-slot form factor suitable for desktop use. Their single shared benchmark result reflects this split, with the MI300X dominating the compute test while the RTX 4070's value lies entirely in its graphics capabilities.