AMD Instinct MI355X vs NVIDIA RTX 5880 Ada Generation Comparison

FAQ

Q: What are the architectural generations of the AMD Instinct MI355X and NVIDIA RTX 5880 Ada Generation?

A: The AMD Instinct MI355X uses the CDNA 4.0 architecture built on a 3 nm process, while the NVIDIA RTX 5880 Ada Generation uses the Ada Lovelace architecture on a 5 nm process.

Q: How much memory does each card have, and what type?

A: The AMD Instinct MI355X has 288 GB of HBM3e memory on an 8192-bit bus, delivering 8.19 TB/s of bandwidth. The NVIDIA RTX 5880 Ada Generation has 48 GB of GDDR6 memory on a 384-bit bus, delivering 864.0 GB/s.

Q: Which card has the higher FP32 compute throughput?

A: The AMD Instinct MI355X reaches 78.64 TFLOPS of FP32, compared to 69.27 TFLOPS for the NVIDIA RTX 5880 Ada Generation.

Q: What are the power requirements for each card?

A: The AMD Instinct MI355X has a 1400 W TDP with a suggested 1800 W power supply, while the NVIDIA RTX 5880 Ada Generation has a 285 W TDP with a suggested 600 W power supply.

Q: What is the form factor of each card?

A: The AMD Instinct MI355X is an OAM Module with no display outputs, while the NVIDIA RTX 5880 Ada Generation is a Dual-slot card measuring 267 mm in length, 112 mm in height, with 4x DisplayPort 1.4a outputs.

Q: What does the database show for the NVIDIA card's benchmark percentile?

A: The NVIDIA RTX 5880 Ada Generation sits at the 85th percentile among all GPUs with an average benchmark score of 45972. The AMD Instinct MI355X has no recorded benchmark scores and stands at the 50th percentile.

Architecture Differences

The two cards represent fundamentally different design philosophies. The AMD Instinct MI355X is built on CDNA 4.0, a compute-optimized architecture fabricated on a 3 nm process at TSMC. Its physical scale is enormous: 185,000 million transistors spread across a 2380 mm² die, yielding a transistor density of 77.7M per mm². This is an accelerator-class chip with 16,384 shading units, 1,024 texture mapping units, and no ROPs (0 MPixel/s pixel rate). The architecture is built around massive memory throughput, using HBM3e across an 8192-bit bus.

The NVIDIA RTX 5880 Ada Generation uses the Ada Lovelace architecture, also from TSMC but on a 5 nm process. The chip is far smaller: 76,300 million transistors on a 609 mm² die, with a higher density of 125.3M per mm². This card is a workstation-oriented GPU with 14,080 shading units, 440 texture mapping units, 176 ROPs, 110 RT cores, and 440 tensor cores. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4, whereas the AMD card lists no graphics API support. The NVIDIA card also includes display outputs (4x DisplayPort 1.4a), making it usable in interactive and visualization workloads.

The AMD chip is designed for pure compute density in a server context: no display outputs, no graphics APIs, and an OAM Module form factor. The NVIDIA card is a Dual-slot PCIe 4.0 x16 workstation card with a 267 mm length and 112 mm height. Both use PCIe x16, but the AMD card uses PCIe 5.0, which doubles the bus bandwidth available to the host.

Clock behavior also differs. The AMD card has a 1000 MHz base clock and 2400 MHz boost clock, while the NVIDIA card has a 975 MHz base and 2460 MHz boost. The AMD card runs memory at 2000 MHz (8 Gbps effective), while the NVIDIA card runs memory at 2250 MHz (18 Gbps effective).

Head-to-Head Benchmarks

The database contains no direct head-to-head benchmark results between these two cards, and the AMD Instinct MI355X has no benchmark scores recorded at all. The comparison must therefore draw on the recorded data for the NVIDIA RTX 5880 Ada Generation and its nearest rivals, plus the architectural specifications of both cards.

The NVIDIA RTX 5880 Ada Generation delivers a Geekbench OpenCL score of 326898. In Passmark tests, its G3D score is 25096, its GPU compute score is 14208, and its DirectX scores are 335 for DirectX 9, 228 for DirectX 11, 167 for DirectX 10, and 70 for DirectX 12. The G2D score is 777. These results place it at the 85th percentile among all GPUs with an average benchmark score of 45972.

The nearest rivals in the database show the NVIDIA card's competitive position. It trails the NVIDIA RTX A2000 by 0.2% (both near 46,000 average score), leads the Intel Arc A730M by 0.8%, leads the AMD Radeon Pro 5500 XT by 1.3%, and trails the AMD Radeon RX 5600M by 1.4%. These are tight margins, indicating that in the recorded average score metric, the RTX 5880 Ada Generation sits in a crowded performance band. Its 85th percentile ranking, however, places it well above most of the GPU population.

For the AMD Instinct MI355X, the absence of benchmark scores means no direct numerical comparison is possible from the database. The FP32 compute figure of 78.64 TFLOPS is 13.5% higher than the NVIDIA card's 69.27 TFLOPS, and memory bandwidth is an order of magnitude higher at 8.19 TB/s versus 864.0 GB/s. These are specification-level differences, not measured benchmark results, but they indicate the AMD card is oriented toward memory-bound and compute-heavy workloads.

The NVIDIA card's texture rate is 1,082.4 GTexel/s and its pixel rate is 433.0 GPixel/s, while the AMD card reaches 2,457.6 GTexel/s with zero pixel rate. The AMD card's texture throughput is more than double, but it cannot render pixels at all.

Specification Differences

The two cards differ across nearly every major specification field.

Process node: AMD uses 3 nm, NVIDIA uses 5 nm, both from TSMC.

Transistors: AMD has 185,000 million, NVIDIA has 76,300 million.

Die size: AMD is 2380 mm², NVIDIA is 609 mm².

Transistor density: AMD is 77.7M / mm², NVIDIA is 125.3M / mm².

Base clock: AMD is 1000 MHz, NVIDIA is 975 MHz.

Boost clock: AMD is 2400 MHz, NVIDIA is 2460 MHz.

Memory clock: AMD is 2000 MHz (8 Gbps effective), NVIDIA is 2250 MHz (18 Gbps effective).

Memory size: AMD is 288 GB, NVIDIA is 48 GB.

Memory type: AMD is HBM3e, NVIDIA is GDDR6.

Memory bus width: AMD is 8192 bit, NVIDIA is 384 bit.

Memory bandwidth: AMD is 8.19 TB/s, NVIDIA is 864.0 GB/s.

Shading units: AMD has 16,384, NVIDIA has 14,080.

Texture mapping units: AMD has 1,024, NVIDIA has 440.

ROPs: AMD has 0, NVIDIA has 176.

RT cores: AMD has none, NVIDIA has 110.

Tensor cores: AMD has none, NVIDIA has 440.

Pixel rate: AMD is 0 MPixel/s, NVIDIA is 433.0 GPixel/s.

Texture rate: AMD is 2,457.6 GTexel/s, NVIDIA is 1,082.4 GTexel/s.

FP32: AMD is 78.64 TFLOPS, NVIDIA is 69.27 TFLOPS.

FP16: AMD is 78.64 TFLOPS (1:1), NVIDIA is 69.27 TFLOPS (1:1).

TDP: AMD is 1400 W, NVIDIA is 285 W.

Slot width: AMD is OAM Module, NVIDIA is Dual-slot.

Power connectors: AMD has none, NVIDIA has 1x 16-pin.

Suggested PSU: AMD is 1800 W, NVIDIA is 600 W.

Bus interface: AMD is PCIe 5.0 x16, NVIDIA is PCIe 4.0 x16.

Display outputs: AMD has no outputs, NVIDIA has 4x DisplayPort 1.4a.

DirectX support: AMD is N/A, NVIDIA is 12 Ultimate (12_2).

OpenGL support: AMD is N/A, NVIDIA is 4.6.

Vulkan support: AMD is N/A, NVIDIA is 1.4.

Dimensions: AMD is 102 mm length and 165 mm width, NVIDIA is 267 mm length and 112 mm height.

Release date: AMD is 2025-06-11, NVIDIA is 2024-01-04.

Production status: AMD has no recorded status, NVIDIA is Active.

Predecessor: AMD lists Radeon Instinct, NVIDIA lists Workstation Ampere.

Successor: AMD has none listed, NVIDIA lists Blackwell PRO W.

Percentile: AMD is 50th, NVIDIA is 85th.

Average benchmark score: AMD is 0, NVIDIA is 45972.

Where Each One Wins

The AMD Instinct MI355X wins in raw compute throughput and memory capacity. Its 78.64 TFLOPS FP32 output exceeds the NVIDIA card by 9.37 TFLOPS, and its 288 GB of HBM3e memory with 8.19 TB/s bandwidth dwarfs the NVIDIA card's 48 GB GDDR6 at 864.0 GB/s. For large-scale compute workloads that fit within the memory footprint, such as dense matrix operations or high-volume data processing, the AMD card's architecture is built specifically for this class of problem. The 8192-bit memory bus and 2,457.6 GTexel/s texture rate further confirm a design aimed at sustained throughput rather than latency-sensitive graphics.

The NVIDIA RTX 5880 Ada Generation wins in every graphics-oriented metric. It has 176 ROPs and a 433.0 GPixel/s pixel rate, while the AMD card cannot rasterize at all. The NVIDIA card includes 110 RT cores and 440 tensor cores, features absent from the AMD chip. It supports DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, making it usable in applications that require a standard graphics API. Its 48 GB of memory is still substantial for workstation use, and its 285 W TDP with a 600 W suggested PSU makes it deployable in conventional desktop or workstation systems, whereas the AMD card requires server infrastructure with an 1800 W power supply.

The NVIDIA card also wins on measured benchmark results in the database. It holds an 85th percentile rank with an average score of 45972, while the AMD card has no recorded scores and sits at the 50th percentile. In the nearest-rival comparison, the NVIDIA card is within 1.4% of the AMD Radeon RX 5600M, 1.3% above the AMD Radeon Pro 5500 XT, 0.8% above the Intel Arc A730M, and 0.2% below the NVIDIA RTX A2000. These are the only recorded performance comparisons available, and they show the NVIDIA card competing in a dense cluster of mid-range GPUs.

The use-case split is therefore clear. The AMD card is a server accelerator for memory-bound and compute-heavy tasks, with no display capability and no graphics API support. The NVIDIA card is a workstation GPU for interactive graphics, rendering, and general-purpose compute, with display outputs, graphics APIs, and a far lower power envelope. Each card wins in the domain it was designed for, and the database shows no overlap in their measured or specified capabilities.