AMD Instinct MI300X vs NVIDIA Quadro RTX 6000 Comparison

Head-to-Head Benchmarks

The recorded database contains one direct benchmark comparison between these two accelerators: Geekbench OpenCL. In that test, the AMD Instinct MI300X scores 317,994 points, while the NVIDIA Quadro RTX 6000 scores 74,179 points. This gives the AMD part a dominant 328.7% lead over the NVIDIA card. The MI300X sits at the 100th percentile among all GPUs in the database, meaning it outperforms every other recorded GPU. The Quadro RTX 6000, by contrast, sits at the 94th percentile, which is still a strong position but clearly a tier below the AMD flagship.

Looking at the nearest rivals for the MI300X provides context: the NVIDIA B200 scores 345,482, the NVIDIA H200 NVL scores 334,891, the NVIDIA L40S scores 295,763, and the NVIDIA RTX 6000 Ada Generation scores 287,237. The MI300X trails the B200 by 8%, trails the H200 NVL by 5%, but beats the L40S by 7.5% and the RTX 6000 Ada by 10.7%. So while the MI300X is not the absolute top performer in the database, it is within striking distance of the fastest accelerators and clearly ahead of the mid-range compute cards.

For the Quadro RTX 6000, the nearest rival data shows a much tighter cluster. The AMD Radeon Pro W6600X scores 107,342, the AMD Radeon Pro Vega II Duo scores 106,750, the AMD Radeon RX 7900M scores 97,487, and the AMD Radeon Pro VII scores 97,131. The Quadro RTX 6000 trails the W6600X by 5.1% and the Vega II Duo by 4.6%, while leading the RX 7900M by 4.5% and the Pro VII by 4.9%. This places the Quadro RTX 6000 in a competitive mid-range bracket, with no single rival holding a decisive advantage.

The OpenCL result is the only head-to-head benchmark in the database, so the 328.7% delta constitutes the entirety of the measured comparison. That is a massive gap, and it reflects the fundamental differences in design philosophy and target workload between these two products. The MI300X is built for scale, with a focus on raw compute throughput and enormous memory capacity, while the Quadro RTX 6000 is a workstation card designed for professional graphics and visualization tasks. The benchmark data shows that in a pure compute workload like OpenCL, the AMD part wins by a wide margin, but the NVIDIA card has its own strengths in other areas.

Architecture Differences

The AMD Instinct MI300X uses the CDNA 3.0 architecture, built on TSMC's 5 nm process. The chip, codenamed Aqua Vanjaram, packs 153,000 million transistors onto a 1017 mm² die, yielding a transistor density of 150.4 million per square millimeter. The NVIDIA Quadro RTX 6000 uses the Turing architecture, built on TSMC's 12 nm process. Its TU102 chip contains 18,600 million transistors on a 754 mm² die, for a density of 24.7 million per square millimeter. The process node advantage is stark: 5 nm versus 12 nm means the AMD chip can fit roughly eight times as many transistors per square millimeter, and it uses a larger die overall.

The two architectures target different compute paradigms. CDNA 3.0 is a compute-focused architecture with no traditional graphics pipeline. The MI300X has 19,456 shading units, 1,216 texture mapping units, and zero ROPs. Its pixel rate is listed as 0 MPixel/s. This is a pure accelerator with no display outputs whatsoever. The Quadro RTX 6000, on the other hand, is a full-featured graphics card with 4,608 shading units, 288 TMUs, and 96 ROPs. It includes 72 RT cores and 576 tensor cores, making it suitable for ray tracing and AI inference workloads. Its pixel rate is 169.9 GPixel/s and its texture rate is 509.8 GTexel/s.

API support also differs completely. The MI300X has no DirectX, OpenGL, or Vulkan support listed, all marked as N/A. The Quadro RTX 6000 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This makes the NVIDIA card usable for graphics applications, while the AMD card is strictly for compute workloads that do not require a graphics API.

The memory architecture is another major divergence. The MI300X uses 192 GB of HBM3 on an 8192-bit bus, delivering 5.32 TB/s of bandwidth. The Quadro RTX 6000 uses 24 GB of GDDR6 on a 384-bit bus, delivering 672.0 GB/s. That is an 8x difference in capacity and roughly 7.9x difference in bandwidth. The MI300X memory clock is listed at 1300 MHz with 5.2 Gbps effective, while the Quadro RTX 6000 runs at 1750 MHz with 14 Gbps effective. The AMD card compensates for the lower per-pin speed with a vastly wider bus.

Where Each One Wins

The MI300X wins in raw compute throughput. Its FP32 performance is 81.72 TFLOPS, compared to 16.31 TFLOPS for the Quadro RTX 6000. That is a 5x advantage in single-precision compute. In FP16, the MI300X delivers 81.72 TFLOPS at a 1:1 ratio, while the Quadro RTX 6000 delivers 32.62 TFLOPS at a 2:1 ratio. Even accounting for the ratio difference, the AMD card has more than double the half-precision throughput. The texture rate for the MI300X is 2,553.6 GTexel/s versus 509.8 GTexel/s for the NVIDIA card.

The Quadro RTX 6000 wins in areas that require a graphics pipeline. Its 96 ROPs and 169.9 GPixel/s pixel rate give it actual display and rasterization capability, while the MI300X has none. The NVIDIA card also supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, making it usable in professional visualization, CAD, and content creation environments. The MI300X has no display outputs and no graphics API support, so it cannot drive a monitor or run standard graphics workloads.

Memory capacity is a clear win for the MI300X. 192 GB of HBM3 versus 24 GB of GDDR6 means the AMD card can hold far larger datasets in memory, which matters for large language model inference, scientific simulations, and other memory-bound compute tasks. The bandwidth advantage of 5.32 TB/s versus 672.0 GB/s reinforces this: the MI300X can feed its compute units with data much faster.

Power consumption is a point where the Quadro RTX 6000 has an advantage. The NVIDIA card has a TDP of 260 W and requires a 600 W suggested PSU, while the MI300X has a TDP of 750 W and suggests a 1150 W PSU. The NVIDIA card is also a dual-slot PCIe card with a 267 mm length, while the MI300X is an OAM module with no standard PCIe slot format. For a workstation or desktop system, the Quadro RTX 6000 is far easier to integrate. For a server or data center, the MI300X OAM form factor is appropriate.

Specification Differences

The two cards differ in nearly every specification category. The MI300X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The Quadro RTX 6000 has a base clock of 1440 MHz and a boost clock of 1770 MHz. Despite the lower clock speeds, the MI300X achieves far higher throughput due to its massive core count and wider memory bus.

Shading units: 19,456 for the MI300X versus 4,608 for the Quadro RTX 6000. TMUs: 1,216 versus 288. ROPs: 0 versus 96. The MI300X has no RT cores or tensor cores listed, while the Quadro RTX 6000 has 72 RT cores and 576 tensor cores. FP32: 81.72 TFLOPS versus 16.31 TFLOPS. FP16: 81.72 TFLOPS (1:1) versus 32.62 TFLOPS (2:1). Pixel rate: 0 MPixel/s versus 169.9 GPixel/s. Texture rate: 2,553.6 GTexel/s versus 509.8 GTexel/s.

Memory: 192 GB HBM3 versus 24 GB GDDR6. Bus width: 8192 bit versus 384 bit. Bandwidth: 5.32 TB/s versus 672.0 GB/s. Memory clock: 1300 MHz (5.2 Gbps effective) versus 1750 MHz (14 Gbps effective). TDP: 750 W versus 260 W. Slot width: OAM Module versus Dual-slot. Power connectors: None versus 1x 6-pin + 1x 8-pin. Suggested PSU: 1150 W versus 600 W. Bus interface: PCIe 5.0 x16 versus PCIe 3.0 x16. Display outputs: No outputs versus 4x DisplayPort 1.4a plus 1x USB Type-C.

Process node: 5 nm versus 12 nm, both from TSMC. Transistors: 153,000 million versus 18,600 million. Die size: 1017 mm² versus 754 mm². Transistor density: 150.4M / mm² versus 24.7M / mm². Release date: the MI300X released on 2023-12-05, while the Quadro RTX 6000 released on 2018-08-12. The Quadro RTX 6000 is marked as end-of-life, with its predecessor being Quadro Volta and its successor being Workstation Ampere. The MI300X has its predecessor listed as Radeon Instinct and no successor. The Quadro RTX 6000 has a launch MSRP of 6,299 USD, while the MI300X has no launch MSRP recorded.

The Quadro RTX 6000 measures 267 mm in length and 111 mm in height. The MI300X has no dimensions recorded in the database. The NVIDIA card is listed in the GeForce 60-series series, while the MI300X has no series designation. The MI300X generation is listed as Instinct (MIx), and the Quadro RTX 6000 generation is Quadro Turing (Tx000).

FAQ

Q: Which card has higher FP32 compute performance?

A: The AMD Instinct MI300X, with 81.72 TFLOPS versus 16.31 TFLOPS for the NVIDIA Quadro RTX 6000.

Q: How much memory does each card have?

A: The MI300X has 192 GB of HBM3, while the Quadro RTX 6000 has 24 GB of GDDR6.

Q: Does the MI300X support graphics APIs like DirectX or Vulkan?

A: No. The MI300X lists DirectX, OpenGL, and Vulkan as N/A. The Quadro RTX 6000 supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4.

Q: What is the power requirement difference?

A: The MI300X has a TDP of 750 W and suggests a 1150 W PSU. The Quadro RTX 6000 has a TDP of 260 W and suggests a 600 W PSU.

Q: Which card has ray tracing and tensor cores?

A: The NVIDIA Quadro RTX 6000, with 72 RT cores and 576 tensor cores. The MI300X lists no RT cores or tensor cores.

Q: How do their OpenCL scores compare?

A: The MI300X scores 317,994, which is 328.7% higher than the Quadro RTX 6000's 74,179.

The Verdict

The data draws a clear line between these two products. The AMD Instinct MI300X is a compute accelerator with enormous memory capacity, massive bandwidth, and leading FP32 and FP16 throughput. It sits at the 100th percentile in the database and beats the Quadro RTX 6000 by 328.7% in OpenCL. It also outperforms the NVIDIA L40S by 7.5% and the RTX 6000 Ada Generation by 10.7%, though it trails the B200 by 8% and the H200 NVL by 5%. For anyone running large-scale compute workloads, especially those that need to hold very large models or datasets in memory, the MI300X is the stronger choice.

The NVIDIA Quadro RTX 6000 is a workstation graphics card with a full feature set: display outputs, DirectX 12 Ultimate support, ray tracing cores, and tensor cores. It sits at the 94th percentile, which is respectable, but its nearest rivals are all within a narrow band of plus or minus 5.1%. It trades blows with the Radeon Pro W6600X, Radeon Pro Vega II Duo, Radeon RX 7900M, and Radeon Pro VII, none of which holds a decisive edge. Its 260 W TDP and dual-slot PCIe form factor make it far easier to install in a standard workstation than the OAM-module MI300X, and its 24 GB of GDDR6 is ample for many professional visualization tasks.

The choice depends entirely on the workload. If the task requires graphics output, ray tracing, or standard API support, the Quadro RTX 6000 is the only option of the two. If the task is pure compute, the MI300X is overwhelmingly faster and has 8x the memory capacity. The MI300X is a server-scale component, however, and its 750 W TDP and OAM form factor mean it is not a drop-in replacement for a desktop GPU. The Quadro RTX 6000 is end-of-life, but it remains a capable workstation card for its intended niche. The recorded data gives no scenario where the Quadro RTX 6000 wins on raw compute, but its graphics and display capabilities are unique advantages that the MI300X does not attempt to match.