AMD Instinct MI300X vs NVIDIA RTX 3000 Mobile Ada Generation Comparison

AMD Instinct MI300X and NVIDIA RTX 3000 Mobile Ada Generation occupy distant corners of the GPU market, one designed for massive datacenter compute and the other for portable workstations. The database records only a single benchmark score for the MI300X, while the RTX 3000 Mobile has no recorded scores, so the comparison relies heavily on architectural specifications and the MI300X's position against its nearest rivals.

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark results between these two GPUs. The AMD Instinct MI300X has one entry in the Geekbench OpenCL test, scoring 317994 points. This result places it in the 100th percentile of all GPUs in the database, meaning it outperforms virtually every other recorded graphics processor.

The MI300X's nearest rivals provide context for its score. The NVIDIA H200 NVL averages 334891 points, which is 5% higher than the MI300X. The NVIDIA B200 scores 345482, an 8% advantage over the MI300X. Moving in the opposite direction, the NVIDIA L40S averages 295763 points, placing it 7.5% below the MI300X. The NVIDIA RTX 6000 Ada Generation scores 287237, which is 10.7% lower than the MI300X. These figures indicate the MI300X sits in a competitive band among high-end accelerators, trailing the top-tier H200 and B200 but leading the L40S and RTX 6000 Ada.

The NVIDIA RTX 3000 Mobile Ada Generation has no benchmark entries in the database. Its percentile rank of 50 places it at the median of all recorded GPUs, but without a numeric score, direct performance comparisons against the MI300X are impossible. The gap in raw compute capability is nevertheless evident from the specification sheets.

In terms of floating-point performance, the MI300X delivers 81.72 TFLOPS for both FP32 and FP16 operations. The RTX 3000 Mobile provides 15.62 TFLOPS for both FP32 and FP16. The MI300X offers roughly five times the raw compute throughput of the mobile chip, a difference that reflects their entirely different design targets.

Where Each One Wins

The AMD Instinct MI300X wins decisively in any workload that demands massive memory capacity or extreme memory bandwidth. Its 192 GB of HBM3 memory operates across an 8192-bit bus, yielding 5.32 TB/s of bandwidth. This configuration suits large language model inference, scientific simulation, and other memory-bound datacenter tasks. The texture rate of 2,553.6 GTexel/s and 1,216 texture mapping units reinforce its position as a compute-first accelerator.

The NVIDIA RTX 3000 Mobile Ada Generation wins in scenarios that require portability, power efficiency, and standard graphics API support. Its 115 W TDP contrasts sharply with the MI300X's 750 W TDP. The mobile chip includes 36 ray tracing cores and 144 tensor cores, capabilities absent from the MI300X's specifications. It also supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, while the MI300X lists no supported graphics APIs. The RTX 3000 Mobile's 48 ROPs and 81.36 GPixel/s pixel rate give it actual display output capability, whereas the MI300X has no display outputs at all.

The RTX 3000 Mobile also wins on integration flexibility. Its IGP slot width and PCIe 4.0 x16 interface suit laptop and compact workstation designs. The MI300X uses an OAM Module form factor with PCIe 5.0 x16, which requires a server-class chassis.

The Verdict

The data indicates these GPUs serve mutually exclusive purposes. The AMD Instinct MI300X is a datacenter accelerator for compute-heavy, memory-intensive workloads. Its 100th percentile benchmark score, 192 GB memory pool, and 5.32 TB/s bandwidth make it suitable for AI training and inference at scale. The absence of display outputs and graphics API support confirms it is not intended for interactive graphics.

The NVIDIA RTX 3000 Mobile Ada Generation is a mobile workstation GPU. Its 8 GB GDDR6 memory on a 128-bit bus produces 256.0 GB/s of bandwidth, which is modest by datacenter standards but appropriate for portable systems. The inclusion of ray tracing and tensor cores, along with full graphics API support, indicates a dual role in both compute and rendering tasks.

A buyer needing maximum compute throughput for server deployment should select the MI300X based on its benchmark standing and specification sheet. A buyer needing a GPU for a laptop or compact workstation with ray tracing, tensor acceleration, and display output should select the RTX 3000 Mobile. There is no overlap in their intended use cases, and the recorded data offers no basis for recommending one over the other outside those contexts.

FAQ

Q: Which GPU has a higher benchmark score?

A: The AMD Instinct MI300X has a recorded Geekbench OpenCL score of 317994, placing it in the 100th percentile. The NVIDIA RTX 3000 Mobile Ada Generation has no recorded benchmark scores in the database.

Q: How much memory does each GPU have?

A: The AMD Instinct MI300X has 192 GB of HBM3 memory. The NVIDIA RTX 3000 Mobile Ada Generation has 8 GB of GDDR6 memory.

Q: Do both GPUs support ray tracing?

A: No. The NVIDIA RTX 3000 Mobile Ada Generation includes 36 ray tracing cores. The AMD Instinct MI300X lists no ray tracing cores in its specifications.

Q: What is the power consumption difference?

A: The AMD Instinct MI300X has a TDP of 750 W. The NVIDIA RTX 3000 Mobile Ada Generation has a TDP of 115 W.

Q: Can either GPU output to a display?

A: The NVIDIA RTX 3000 Mobile Ada Generation has display outputs described as "Portable Device Dependent." The AMD Instinct MI300X has no display outputs.

Q: Which GPU has higher memory bandwidth?

A: The AMD Instinct MI300X has 5.32 TB/s of bandwidth from its 8192-bit memory bus. The NVIDIA RTX 3000 Mobile Ada Generation has 256.0 GB/s from its 128-bit bus.

Architecture Differences

The AMD Instinct MI300X uses the CDNA 3.0 architecture on a chip codenamed Aqua Vanjaram. It is built on a 5 nm process at TSMC with 153,000 million transistors on a 1017 mm² die, giving a transistor density of 150.4M per mm². The chip includes 19,456 shading units and 1,216 texture mapping units, but no ROPs, ray tracing cores, or tensor cores are listed. Its clock speeds are 1000 MHz base and 2100 MHz boost. The memory subsystem uses HBM3 across an 8192-bit bus. The MI300X has no display outputs and no supported graphics APIs.

The NVIDIA RTX 3000 Mobile Ada Generation uses the Ada Lovelace architecture on the AD106 chip. It is also built on a 5 nm process at TSMC but with 22,900 million transistors on a much smaller 188 mm² die, yielding 121.8M transistors per mm². The mobile chip has 4,608 shading units, 144 texture mapping units, and 48 ROPs. It includes 36 ray tracing cores and 144 tensor cores. Its clocks run at 1395 MHz base and 1695 MHz boost. Memory is GDDR6 across a 128-bit bus. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

The architectural philosophies diverge sharply. The MI300X is a pure compute accelerator with no fixed-function graphics hardware, optimized for throughput on matrix-style workloads. The RTX 3000 Mobile pairs compute with ray tracing and tensor acceleration, retaining full graphics API compatibility for rendering tasks. The transistor counts reflect this split: the MI300X packs over six times more transistors into a die over five times larger.

Specification Differences

The two GPUs differ in nearly every measurable specification. The MI300X has a base clock of 1000 MHz versus 1395 MHz for the RTX 3000 Mobile. Boost clocks are 2100 MHz versus 1695 MHz. The MI300X has 19,456 shading units against 4,608 for the mobile chip. Texture mapping units number 1,216 versus 144. The MI300X lists zero ROPs while the RTX 3000 Mobile has 48. Memory size is 192 GB versus 8 GB. Memory type is HBM3 versus GDDR6. Bus width is 8192 bit versus 128 bit. Bandwidth is 5.32 TB/s versus 256.0 GB/s.

FP32 performance is 81.72 TFLOPS for the MI300X and 15.62 TFLOPS for the RTX 3000 Mobile. FP16 performance follows the same ratio at 81.72 TFLOPS versus 15.62 TFLOPS, with both listed as 1:1 conversion rates. Texture rate is 2,553.6 GTexel/s versus 244.1 GTexel/s. Pixel rate is 0 MPixel/s versus 81.36 GPixel/s. TDP is 750 W versus 115 W. The MI300X uses an OAM Module slot width while the RTX 3000 Mobile is an IGP. Bus interface is PCIe 5.0 x16 versus PCIe 4.0 x16. The MI300X has no display outputs; the RTX 3000 Mobile has portable-device-dependent outputs.

The release dates differ as well. The MI300X launched on 2023-12-05, while the RTX 3000 Mobile launched on 2023-03-20. The MI300X's predecessor is the Radeon Instinct line, and the RTX 3000 Mobile's predecessor is Ampere-MW with a successor of Blackwell-MW. The MI300X has no production status listed, while the RTX 3000 Mobile is marked as Active. Neither GPU has a launch MSRP in the database.