AMD Instinct MI300A vs NVIDIA GeForce RTX 4070 Mobile Comparison

The Verdict

The AMD Instinct MI300A and NVIDIA GeForce RTX 4070 Mobile are fundamentally different hardware classes. The MI300A is a data center compute accelerator built on CDNA 3.0 architecture, while the RTX 4070 Mobile is a laptop graphics processor built on Ada Lovelace. Benchmark data for the MI300A is absent from the database, meaning its recorded percentile rank sits at 50 against all GPUs with an average benchmark score of zero. The RTX 4070 Mobile, by contrast, holds a 73rd percentile rank with a recorded average benchmark score of 27,435.

The data shows no head-to-head benchmark comparisons exist between these two parts, and neither unit records a win in direct testing. For rendering and graphics workloads, the RTX 4070 Mobile is the only one of the two with functional display outputs, and its API support includes DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4. The MI300A lists no graphics APIs and has no display outputs, confirming it is not a consumer graphics card. Anyone needing a mobile GPU for gaming or graphics work must choose the RTX 4070 Mobile, as the MI300A cannot output video at all.

For compute-heavy server workloads, the MI300A carries massive resources: 128 GB of HBM3 memory, a 5.32 TB/s memory bandwidth, and 61.29 TFLOPS of FP32 throughput. The RTX 4070 Mobile offers 8 GB of GDDR6, 256.0 GB/s of bandwidth, and 15.62 TFLOPS of FP32. The MI300A also uses a 5 nm process at 150.4M transistors per mm² versus the RTX 4070 Mobile's 121.8M per mm². The MI300A targets rack-scale compute with a 750 W thermal envelope and PCIe 5.0 x16, while the RTX 4070 Mobile fits an IGP form factor at 115 W with PCIe 4.0 x8.

FAQ

Q: Which GPU has the higher average benchmark score?

A: The NVIDIA GeForce RTX 4070 Mobile has a recorded average benchmark score of 27,435. The AMD Instinct MI300A has an average benchmark score of zero in the database.

Q: Does the MI300A support DirectX or Vulkan?

A: No. The MI300A lists DirectX, OpenGL, and Vulkan APIs as N/A and has no display outputs. The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: How much memory bandwidth does each processor provide?

A: The MI300A provides 5.32 TB/s of bandwidth across a 8192-bit HBM3 interface. The RTX 4070 Mobile provides 256.0 GB/s across a 128-bit GDDR6 interface.

Q: What are the transistor counts and die sizes?

A: The MI300A has 153,000 million transistors on a 1017 mm² die, for a density of 150.4M per mm². The RTX 4070 Mobile has 22,900 million transistors on a 188 mm² die, for a density of 121.8M per mm².

Q: Which card has ray tracing and tensor cores?

A: The RTX 4070 Mobile has 36 ray tracing cores and 144 tensor cores. The MI300A lists no ray tracing cores and no tensor cores in the database.

Q: How do the clock speeds compare?

A: The MI300A has a base clock of 1000 MHz and a boost clock of 2100 MHz. The RTX 4070 Mobile has a base clock of 1395 MHz and a boost clock of 1695 MHz.

Architecture Differences

The two processors come from different architectural lineages. The AMD Instinct MI300A uses the CDNA 3.0 architecture, built on a chip called Aqua Vanjaram. The NVIDIA GeForce RTX 4070 Mobile uses the Ada Lovelace architecture, built on the AD106 chip. Both are manufactured by TSMC on a 5 nm process, but the MI300A packs 153,000 million transistors into a 1017 mm² die, achieving a density of 150.4M per mm². The RTX 4070 Mobile fits 22,900 million transistors into a 188 mm² die, reaching 121.8M per mm².

The MI300A is part of AMD's Instinct (MIx) generation and succeeds the Radeon Instinct line. The RTX 4070 Mobile belongs to the GeForce 40-series, follows the GeForce 30 Mobile, and has a successor in the GeForce 50 Mobile. The MI300A has no successor recorded in the database.

Feature support separates the two sharply. The MI300A has no display outputs, no DirectX support, no OpenGL support, no Vulkan support, and no pixel rate output. It reports a texture rate of 1,915.2 GTexel/s and an FP32 throughput of 61.29 TFLOPS. The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, outputs 81.36 GPixel/s, and reaches 244.1 GTexel/s. It also includes 36 ray tracing cores and 144 tensor cores, features the MI300A lacks entirely.

The memory subsystems reflect different design goals. The MI300A uses HBM3 with 128 GB capacity, an 8192-bit bus, and 5.32 TB/s bandwidth. The RTX 4070 Mobile uses GDDR6 with 8 GB capacity, a 128-bit bus, and 256.0 GB/s bandwidth. The MI300A also has far more shading units: 14,592 versus 4,608, with 912 texture mapping units versus 144.

Both chips are produced on the same 5 nm node at TSMC, but the MI300A's die is more than five times larger and carries nearly seven times the transistor count. The higher density of the MI300A indicates a more compact arrangement of logic per square millimeter. The RTX 4070 Mobile's architecture includes dedicated hardware for graphics acceleration, while the MI300A appears focused on raw compute throughput without graphics-oriented blocks.

Specification Differences

The database records several fields where the two processors differ. The MI300A has a base clock of 1000 MHz and a boost clock of 2100 MHz, while the RTX 4070 Mobile starts at 1395 MHz and boosts to 1695 MHz. Memory clocks differ as well: the MI300A runs at 1300 MHz with 5.2 Gbps effective, and the RTX 4070 Mobile runs at 2000 MHz with 16 Gbps effective.

Memory capacity, type, bus width, and bandwidth all differ. The MI300A has 128 GB of HBM3 on a 8192-bit bus with 5.32 TB/s bandwidth. The RTX 4070 Mobile has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Compute resources differ substantially. The MI300A has 14,592 shading units, 912 TMUs, and zero ROPs. The RTX 4070 Mobile has 4,608 shading units, 144 TMUs, and 48 ROPs. Ray tracing and tensor core counts appear only on the RTX 4070 Mobile: 36 RT cores and 144 tensor cores. The MI300A records neither.

Pixel and texture rates diverge. The MI300A reports 0 MPixel/s and 1,915.2 GTexel/s. The RTX 4070 Mobile reports 81.36 GPixel/s and 244.1 GTexel/s. FP32 performance favors the MI300A at 61.29 TFLOPS versus 15.62 TFLOPS for the RTX 4070 Mobile. The RTX 4070 Mobile also lists FP16 at 15.62 TFLOPS with a 1:1 ratio, while the MI300A has no FP16 figure recorded.

Power and interface specs differ. The MI300A has a TDP of 750 W, a suggested PSU of 1150 W, an OAM Module slot width, and no power connectors listed. The RTX 4070 Mobile has a TDP of 115 W, no suggested PSU, an IGP slot width, and no power connectors listed. The MI300A uses PCIe 5.0 x16; the RTX 4070 Mobile uses PCIe 4.0 x8.

Display outputs separate the two completely. The MI300A lists no outputs. The RTX 4070 Mobile lists outputs as portable device dependent. Form factors also differ: the MI300A is an OAM Module while the RTX 4070 Mobile is an IGP. The MI300A released on 2023-12-05, and the RTX 4070 Mobile released on 2023-01-02.

Head-to-Head Benchmarks

No direct head-to-head benchmark results exist in the database for the AMD Instinct MI300A against the NVIDIA GeForce RTX 4070 Mobile. The MI300A has no recorded benchmarks, no wins, and no nearest rivals. The RTX 4070 Mobile, however, has nine recorded benchmark scores and a set of nearest rivals that place its performance in context.

The RTX 4070 Mobile's strongest recorded result is a Geekbench OpenCL score of 109,197, with a Geekbench Vulkan score of 108,367 close behind. Its Passmark G3D score reaches 19,587, and its Passmark GPU compute score sits at 8,399. Lower scores appear in the Passmark DirectX tests: 223 in DirectX 9, 179 in DirectX 11, 116 in DirectX 10, and 85 in DirectX 12. The Passmark G2D score is 763.

The nearest rival data for the RTX 4070 Mobile shows tight competition. The AMD Radeon RX 6700 XT has an average score of 27,425, a delta of 0 percent from the RTX 4070 Mobile. The NVIDIA GeForce RTX 3090 scores 27,565, which is 0.5 percent above the RTX 4070 Mobile. The NVIDIA RTX PRO 4000 Blackwell scores 27,135, which is 1.1 percent below the RTX 4070 Mobile. The AMD Radeon Pro Vega 20 scores 27,839, which is 1.5 percent above the RTX 4070 Mobile.

These delta values indicate that the RTX 4070 Mobile performs in a narrow band around the Radeon RX 6700 XT. The RTX 4070 Mobile trails the Radeon Pro Vega 20 by 1.5 percent and the RTX 3090 by 0.5 percent, while leading the RTX PRO 4000 Blackwell by 1.1 percent. The average benchmark score of 27,435 places it within 404 points of the RX 6700 XT, which is under 1.5 percent either way.

The MI300A's absence from benchmark data means no direct comparison is possible from the database. Its 50th percentile rank against all GPUs reflects the zero average score, not a measured performance level. The RTX 4070 Mobile's 73rd percentile rank reflects the recorded benchmark suite. In the absence of head-to-head results, the only quantitative comparison available is the specification-level analysis above. The MI300A's FP32 throughput of 61.29 TFLOPS is roughly four times the RTX 4070 Mobile's 15.62 TFLOPS, and its memory bandwidth of 5.32 TB/s exceeds the RTX 4070 Mobile's 256.0 GB/s by a factor of more than 20. Those figures, however, come from the specification fields, not from any direct benchmark run in the database.