AMD Instinct MI350X vs NVIDIA GeForce RTX 4070 Mobile Comparison

Where Each One Wins

The recorded data presents two fundamentally different products with almost no overlap in their intended workloads. The AMD Instinct MI350X is a data center accelerator with no display outputs and no graphics API support, while the NVIDIA GeForce RTX 4070 Mobile is a laptop GPU with full DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 support. The MI350X wins in every raw compute metric recorded, including FP32 throughput, texture rate, memory capacity, and memory bandwidth. The RTX 4070 Mobile wins in the only category where it has recorded benchmark scores: the Geekbench and Passmark suites, where it achieves an average benchmark score of 27,435 and sits at the 73rd percentile among all GPUs in the database.

The MI350X has no recorded benchmarks and an average benchmark score of 0, placing it at the 50th percentile. This does not indicate poor performance; rather, it reflects that the database contains no test results for this accelerator, likely because it targets server deployments rather than consumer benchmarking scenarios. The RTX 4070 Mobile, by contrast, has nine recorded benchmark scores spanning OpenCL, Vulkan, and six Passmark tests. Its strongest results include a Geekbench OpenCL score of 109,197, a Geekbench Vulkan score of 108,367, and a Passmark G3D score of 19,587. The MI350X's FP32 throughput of 72.09 TFLOPS is 4.6 times higher than the RTX 4070 Mobile's 15.62 TFLOPS, and its texture rate of 2,252.8 GTexel/s is 9.2 times higher. The MI350X also delivers 8.19 TB/s of memory bandwidth versus 256.0 GB/s, a 32-fold advantage.

For gaming, rendering, or any client-side graphics workload, the RTX 4070 Mobile is the only viable option because the MI350X exposes no display outputs and supports no graphics APIs. For compute-heavy tasks such as AI training, scientific simulation, or large-scale data processing, the MI350X's massive memory pool and raw compute throughput make it the clear choice, provided the software stack does not require graphics API support.

Architecture Differences

The two GPUs use entirely different architectures from different generations and design philosophies. The MI350X is built on CDNA 4.0, AMD's compute-optimized architecture, fabricated on a 3 nm process at TSMC. It packs 185,000 million transistors into a 2,380 mm² die, yielding a transistor density of 77.7 million transistors per square millimeter. The chip is designated MI350 256CU, indicating 256 compute units, which translates to 16,384 shading units, 1,024 texture mapping units, and 0 ROPs. The absence of ROPs aligns with its role as a pure compute accelerator with no display pipeline.

The RTX 4070 Mobile uses NVIDIA's Ada Lovelace architecture, built on a 5 nm process at TSMC. The AD106 chip contains 22,900 million transistors on a 188 mm² die, for a transistor density of 121.8 million per square millimeter. This is a notably denser design, though the MI350X's much larger die gives it nearly 8 times more total transistors. The RTX 4070 Mobile has 4,608 shading units, 144 TMUs, 48 ROPs, 36 ray tracing cores, and 144 tensor cores. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the MI350X reports N/A for all graphics APIs.

Memory configurations differ drastically. The MI350X uses 288 GB of HBM3e on an 8,192-bit bus, achieving 8.19 TB/s of bandwidth. The RTX 4070 Mobile uses 8 GB of GDDR6 on a 128-bit bus, achieving 256.0 GB/s. Clock speeds also differ: the MI350X has a 1,000 MHz base and 2,200 MHz boost, while the RTX 4070 Mobile runs at 1,395 MHz base and 1,695 MHz boost. The mobile GPU's higher base clock reflects its smaller, more power-efficient design. Power consumption is another divider: the MI350X has a 1,000 W TDP and requires a 1,400 W suggested PSU, while the RTX 4070 Mobile has a 115 W TDP and operates as an IGP with no power connectors.

The MI350X connects via PCIe 5.0 x16, uses an OAM Module slot, and has no display outputs. The RTX 4070 Mobile uses PCIe 4.0 x8, is an IGP, and has portable-device-dependent outputs. Release dates place the RTX 4070 Mobile in January 2023 and the MI350X in June 2025, with the latter succeeding the Radeon Instinct line and the former succeeding GeForce 30 Mobile and preceding GeForce 50 Mobile.

The Verdict

The data supports a straightforward choice based on workload. For any task requiring graphics output, ray tracing, or consumer API support, the RTX 4070 Mobile is the only option between the two. Its 73rd percentile ranking and average benchmark score of 27,435 place it in the upper tier of all GPUs in the database, with nearest rivals including the AMD Radeon RX 6700 XT (delta 0%), NVIDIA GeForce RTX 3090 (delta -0.5%), NVIDIA RTX PRO 4000 Blackwell (delta 1.1%), and AMD Radeon Pro Vega 20 (delta -1.5%). These deltas are all within 1.5 percentage points, indicating that the RTX 4070 Mobile performs essentially on par with desktop GPUs from a few generations ago.

For compute-heavy workloads that do not require graphics output, the MI350X delivers vastly superior raw specifications: 72.09 TFLOPS FP32, 2,252.8 GTexel/s texture rate, 288 GB of HBM3e memory, and 8.19 TB/s of bandwidth. The 1,000 W TDP and OAM Module form factor indicate a server-class component, not something that would ever appear in a consumer desktop or laptop. The RTX 4070 Mobile's 15.62 TFLOPS FP32 and 256.0 GB/s bandwidth are sufficient for mobile gaming and moderate compute tasks but are dwarfed by the MI350X's specifications.

Choose the RTX 4070 Mobile if the use case involves gaming, content creation, or any graphical interface. Choose the MI350X if the workload is purely computational and can leverage massive memory and throughput, with no need for display output. The two products do not compete in any meaningful sense; they serve disjoint markets.

FAQ

Q: Which GPU has higher FP32 compute throughput?

A: The AMD Instinct MI350X delivers 72.09 TFLOPS FP32, compared to 15.62 TFLOPS for the NVIDIA GeForce RTX 4070 Mobile.

Q: Does the MI350X support DirectX or Vulkan?

A: No. The MI350X reports N/A for DirectX, OpenGL, and Vulkan. The RTX 4070 Mobile supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: How much memory does each GPU have?

A: The MI350X has 288 GB of HBM3e on an 8,192-bit bus with 8.19 TB/s bandwidth. The RTX 4070 Mobile has 8 GB of GDDR6 on a 128-bit bus with 256.0 GB/s bandwidth.

Q: What is the power requirement for each GPU?

A: The MI350X has a 1,000 W TDP and a suggested PSU of 1,400 W. The RTX 4070 Mobile has a 115 W TDP and no suggested PSU listed.

Q: Which GPU has ray tracing cores?

A: The RTX 4070 Mobile has 36 ray tracing cores and 144 tensor cores. The MI350X does not list any ray tracing or tensor cores.

Q: How does the RTX 4070 Mobile compare to its nearest rivals?

A: Its average benchmark score of 27,435 is within 1.5% of the AMD Radeon RX 6700 XT (27,425, 0% delta), NVIDIA GeForce RTX 3090 (27,565, -0.5%), NVIDIA RTX PRO 4000 Blackwell (27,135, 1.1%), and AMD Radeon Pro Vega 20 (27,839, -1.5%).

Head-to-Head Benchmarks

The database records no direct head-to-head benchmark comparisons between the MI350X and RTX 4070 Mobile, so the analysis relies on the individual recorded specifications and benchmark scores. The MI350X has zero recorded benchmarks and an average score of 0, while the RTX 4070 Mobile has nine recorded scores. The largest wins for the MI350X come from raw specification advantages. Its FP32 throughput of 72.09 TFLOPS is 4.6 times the RTX 4070 Mobile's 15.62 TFLOPS. Its texture rate of 2,252.8 GTexel/s is 9.2 times the RTX 4070 Mobile's 244.1 GTexel/s. Memory bandwidth of 8.19 TB/s versus 256.0 GB/s represents a 32-fold difference, and memory capacity of 288 GB versus 8 GB is a 36-fold difference.

The RTX 4070 Mobile's wins are in actual benchmark scores and graphics capability. Its Geekbench OpenCL score of 109,197 and Vulkan score of 108,367 demonstrate strong compute performance in a mobile form factor. Its Passmark G3D score of 19,587 and GPU compute score of 8,399 provide additional data points. The RTX 4070 Mobile also has a pixel rate of 81.36 GPixel/s, while the MI350X records 0 MPixel/s, reflecting the latter's lack of a rasterization pipeline.

The MI350X's 1,000 W TDP versus the RTX 4070 Mobile's 115 W TDP indicates that the MI350X consumes roughly 8.7 times more power, which is consistent with its larger die and higher performance targets. The MI350X's base clock of 1,000 MHz is lower than the RTX 4070 Mobile's 1,395 MHz, but its boost clock of 2,200 MHz exceeds the mobile GPU's 1,695 MHz. The MI350X uses a 3 nm process versus 5 nm for the RTX 4070 Mobile, yet the mobile chip achieves a higher transistor density (121.8M/mm² versus 77.7M/mm²), reflecting the different design goals of compute accelerators versus consumer GPUs.

Specification Differences

The two GPUs differ in nearly every recorded specification field. The MI350X uses CDNA 4.0 architecture, while the RTX 4070 Mobile uses Ada Lovelace. The process nodes are 3 nm and 5 nm, respectively, both fabricated by TSMC. Transistor counts are 185,000 million versus 22,900 million, and die sizes are 2,380 mm² versus 188 mm². The MI350X has 16,384 shading units, 1,024 TMUs, and 0 ROPs; the RTX 4070 Mobile has 4,608 shading units, 144 TMUs, and 48 ROPs. Ray tracing cores are absent on the MI350X but number 36 on the RTX 4070 Mobile, and tensor cores are also absent on the MI350X but number 144 on the RTX 4070 Mobile.

Base clocks are 1,000 MHz for the MI350X and 1,395 MHz for the RTX 4070 Mobile. Boost clocks are 2,200 MHz and 1,695 MHz, respectively. Memory speed is 8 Gbps effective for the MI350X and 16 Gbps effective for the RTX 4070 Mobile. Memory size is 288 GB HBM3e versus 8 GB GDDR6. Bus widths are 8,192 bit versus 128 bit. Bandwidth is 8.19 TB/s versus 256.0 GB/s. Texture rates are 2,252.8 GTexel/s versus 244.1 GTexel/s. Pixel rates are 0 MPixel/s versus 81.36 GPixel/s. FP32 performance is 72.09 TFLOPS versus 15.62 TFLOPS, and FP16 performance is identical at 72.09 TFLOPS versus 15.62 TFLOPS, both at 1:1 ratios.

The MI350X has a 1,000 W TDP, a 1,400 W suggested PSU, an OAM Module slot width, and no power connectors. The RTX 4070 Mobile has a 115 W TDP, no suggested PSU, an IGP slot width, and no power connectors. The bus interfaces are PCIe 5.0 x16 versus PCIe 4.0 x8. The MI350X has no display outputs, while the RTX 4070 Mobile has portable-device-dependent outputs. The MI350X measures 102 mm by 165 mm, while the RTX 4070 Mobile has no recorded dimensions. Release dates are June 2025 for the MI350X and January 2023 for the RTX 4070 Mobile. The MI350X's predecessor is Radeon Instinct, while the RTX 4070 Mobile's predecessor is GeForce 30 Mobile and its successor is GeForce 50 Mobile.