AMD Instinct MI325X vs NVIDIA GeForce RTX 5090 Comparison

Head-to-Head Benchmarks

The recorded data shows no direct head-to-head benchmark results between the AMD Instinct MI325X and the NVIDIA GeForce RTX 5090. The MI325X has no benchmark entries, an average score of 0, and holds the 50th percentile among all GPUs in the database. The RTX 5090, in contrast, has ten recorded benchmark scores, an average score of 79,842, and sits at the 92nd percentile.

The RTX 5090's strongest recorded result is in Geekbench Vulkan with a score of 376,728, followed by Geekbench OpenCL at 334,370. In Passmark tests, the G3D score reaches 39,650, while GPU compute lands at 26,756. DirectX 10, 11, and 12 scores are 226, 341, and 185 respectively, with DirectX 9 at 395. The 2D score is 1,413.

Because the MI325X carries no benchmark scores, every comparison in this section must rely on its architectural specifications and the RTX 5090's measured results. The MI325X's raw compute figures are substantial: FP32 and FP16 both reach 81.72 TFLOPS with a 1:1 ratio. The RTX 5090 delivers 104.8 TFLOPS in both FP32 and FP16, also at 1:1. That puts the RTX 5090 roughly 28% ahead in peak floating-point throughput, a meaningful margin for compute-heavy workloads.

Texture rate tells a different story. The MI325X achieves 2,553.6 GTexel/s, while the RTX 5090 reaches 1,636.8 GTexel/s. The MI325X leads by about 56% in texture fill, reflecting its larger TMU count of 1,216 versus 680. However, the MI325X has zero ROPs and a pixel rate of 0 MPixel/s, meaning it cannot perform traditional rasterization output. The RTX 5090 has 176 ROPs and a pixel rate of 423.6 GPixel/s, a fundamental capability difference.

Memory bandwidth heavily favors the MI325X. It uses 256 GB of HBM3e across an 8192-bit bus, yielding 6.14 TB/s. The RTX 5090 uses 32 GB of GDDR7 across a 512-bit bus, yielding 1.79 TB/s. The MI325X offers 3.4 times the bandwidth and eight times the capacity. Shading unit counts are closer: the MI325X has 19,456 shading units, while the RTX 5090 has 21,760, a 12% advantage for NVIDIA.

The RTX 5090's nearest rivals in the database, based on average scores, include the NVIDIA Tesla P100 PCIe 16 GB at 79,605 (0.3% lower), the Tesla P100 PCIe 12 GB at 79,396 (0.6% lower), the AMD Radeon RX 6850M XT at 78,940 (1.1% lower), and the AMD Radeon Pro Vega 64X at 80,959 (1.4% higher). These deltas are small, indicating the RTX 5090's measured performance sits in a tight competitive band. The MI325X has no nearest rivals listed, reinforcing its status as a compute accelerator without a benchmark footprint.

Architecture Differences

The MI325X uses the Aqua Vanjaram chip built on CDNA 3.0 architecture, fabricated on a 5 nm process at TSMC. The RTX 5090 uses the GB202 chip built on Blackwell 2.0 architecture, also on a 5 nm process at TSMC. Both share the same process node and foundry, but their transistor budgets diverge sharply. The MI325X packs 153,000 million transistors on a 1017 mm² die, giving a density of 150.4M per mm². The RTX 5090 has 92,200 million transistors on a 750 mm² die, yielding 122.9M per mm². The MI325X uses 66% more transistors on a 36% larger die.

Clock behavior differs substantially. The MI325X has a base clock of 1000 MHz and a boost clock of 2100 MHz. The RTX 5090 has a much higher base of 2017 MHz and a boost of 2407 MHz. Despite the MI325X's lower clocks, its memory runs at 1500 MHz with 6 Gbps effective, while the RTX 5090's memory runs at 1750 MHz with 28 Gbps effective. The RTX 5090's GDDR7 achieves a higher effective data rate per pin, but the MI325X's HBM3e wins on raw bandwidth due to the 8192-bit bus.

The MI325X is a compute module with no display outputs, no ROPs, and no API support for DirectX, OpenGL, or Vulkan. It uses an OAM module slot width, has no power connectors listed, and requires a 1400 W suggested PSU. The RTX 5090 is a dual-slot card with 1x HDMI 2.1b and 3x DisplayPort 2.1b outputs. It supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. It uses a single 16-pin power connector and a 950 W suggested PSU.

The RTX 5090 includes 170 ray tracing cores and 680 tensor cores, features entirely absent from the MI325X's listed specifications. The MI325X has no RT cores and no tensor cores listed. This reflects their divergent purposes: the MI325X targets compute acceleration, while the RTX 5090 handles graphics, ray tracing, and AI workloads through dedicated hardware. The MI325X's TDP is 1000 W, versus 575 W for the RTX 5090.

Physical dimensions differ as well. The RTX 5090 measures 304 mm in length, 137 mm in height, and 40 mm in width. The MI325X has no dimensions recorded beyond its OAM module form factor. The RTX 5090's production status is active, and its release date is 2025-01-29. The MI325X released on 2024-10-09, with no production status recorded. The MI325X's predecessor is Radeon Instinct, while the RTX 5090's predecessor is GeForce 40 and successor is GeForce 60.

The Verdict

The data indicates a clear split by workload type. For graphics rendering, rasterization, ray tracing, and general-purpose GPU compute with API support, the RTX 5090 is the only viable option. It has ROPs, pixel output, display connections, and full DirectX, OpenGL, and Vulkan support. The MI325X cannot output pixels at all, with a pixel rate of 0 MPixel/s and no display outputs. No benchmark score exists for the MI325X, while the RTX 5090 records an average score of 79,842 and a 92nd percentile rank.

For memory-bound and capacity-bound compute workloads, the MI325X dominates on paper. Its 256 GB HBM3e pool with 6.14 TB/s bandwidth exceeds the RTX 5090's 32 GB GDDR7 with 1.79 TB/s by factors of 8 and 3.4 respectively. Texture rate also favors the MI325X at 2,553.6 GTexel/s versus 1,636.8 GTexel/s. However, the RTX 5090 counters with higher FP32 and FP16 throughput at 104.8 TFLOPS versus 81.72 TFLOPS, a 28% advantage.

The RTX 5090's 92nd percentile rank among all GPUs reflects its measured performance in the database. The MI325X's 50th percentile rank with an average score of 0 indicates it has no verified benchmark presence. This is not a judgment of capability but a fact of measurement: the RTX 5090 has data, the MI325X does not. The MI325X's nearest rivals list is empty, while the RTX 5090's nearest rivals cluster within 1.4% of its average score, showing tight competition in its measured tier.

The RTX 5090's launch MSRP is 1,999 USD. No price data exists for the MI325X. The RTX 5090's power requirement of 575 W TDP and 950 W suggested PSU is far lower than the MI325X's 1000 W TDP and 1400 W suggested PSU. This makes the RTX 5090 more suitable for conventional systems, while the MI325X demands server-class power delivery.

FAQ

Q: Which GPU has more memory bandwidth?

A: The AMD Instinct MI325X has 6.14 TB/s from HBM3e across an 8192-bit bus. The NVIDIA GeForce RTX 5090 has 1.79 TB/s from GDDR7 across a 512-bit bus. The MI325X delivers about 3.4 times the bandwidth.

Q: Does the MI325X support DirectX or Vulkan?

A: No. The MI325X lists N/A for DirectX, OpenGL, and Vulkan APIs. The RTX 5090 supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4.

Q: What is the RTX 5090's average benchmark score?

A: The RTX 5090 has an average benchmark score of 79,842 across ten tests, putting it at the 92nd percentile of all GPUs. The MI325X has an average score of 0 and no recorded benchmarks.

Q: How do their transistor counts compare?

A: The MI325X has 153,000 million transistors on a 1017 mm² die. The RTX 5090 has 92,200 million transistors on a 750 mm² die. Both use a 5 nm TSMC process.

Q: Which GPU has a higher FP32 compute throughput?

A: The RTX 5090 achieves 104.8 TFLOPS in FP32, while the MI325X achieves 81.72 TFLOPS. The RTX 5090 is approximately 28% higher. Both support FP16 at a 1:1 ratio with their FP32 figures.

Q: Does the MI325X have ray tracing cores?

A: No. The MI325X lists no RT cores and no tensor cores. The RTX 5090 has 170 RT cores and 680 tensor cores.

Where Each One Wins

The MI325X wins decisively in memory capacity and bandwidth. With 256 GB of HBM3e and 6.14 TB/s, it suits large-scale data processing, model training, or inference workloads where the working set exceeds 32 GB. The RTX 5090's 32 GB GDDR7 is a fraction of that capacity. The MI325X also wins on texture rate at 2,553.6 GTexel/s, a 56% lead.

The RTX 5090 wins on raw floating-point compute. Its 104.8 TFLOPS in FP32 and FP16 surpasses the MI325X's 81.72 TFLOPS. It also wins on pixel output, with 423.6 GPixel/s and 176 ROPs, versus the MI325X's 0 MPixel/s and zero ROPs. The RTX 5090 has higher clocks, with a boost of 2407 MHz versus 2100 MHz.

The RTX 5090 wins on software ecosystem and API support. It runs DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4, and it has display outputs for direct monitor connection. The MI325X has no display outputs and no API support, making it unusable for standard graphics workloads. The RTX 5090 also wins on power efficiency, consuming 575 W TDP versus 1000 W, and requiring a 950 W PSU versus 1400 W.

The MI325X wins on transistor count and die size, with 153,000 million transistors on 1017 mm². The RTX 5090 uses 92,200 million on 750 mm². The MI325X also has more shading units at 19,456 versus 21,760? No, that is incorrect: the RTX 5090 has more shading units at 21,760. The MI325X has more TMUs at 1,216 versus 680. The RTX 5090 wins on shading units, ROPs, RT cores, tensor cores, and clock speeds.

For pure compute throughput per watt, the RTX 5090 is better. It delivers 104.8 TFLOPS at 575 W, while the MI325X delivers 81.72 TFLOPS at 1000 W. The RTX 5090's efficiency advantage is substantial. The MI325X's advantage is exclusively in memory and texture throughput, making it a specialized accelerator rather than a general-purpose GPU.

Specification Differences

The two accelerators differ in nearly every measurable specification except process node, foundry, and bus interface. Both use 5 nm TSMC and PCIe 5.0 x16. The MI325X uses CDNA 3.0 architecture with 153,000 million transistors on a 1017 mm² die. The RTX 5090 uses Blackwell 2.0 with 92,200 million transistors on a 750 mm² die. Transistor density is 150.4M per mm² for AMD and 122.9M per mm² for NVIDIA.

Clocks: the MI325X runs at 1000 MHz base and 2100 MHz boost, with memory at 1500 MHz (6 Gbps effective). The RTX 5090 runs at 2017 MHz base and 2407 MHz boost, with memory at 1750 MHz (28 Gbps effective). Memory: the MI325X has 256 GB HBM3e on an 8192-bit bus with 6.14 TB/s. The RTX 5090 has 32 GB GDDR7 on a 512-bit bus with 1.79 TB/s.

Compute units: the MI325X has 19,456 shading units, 1,216 TMUs, and 0 ROPs. The RTX 5090 has 21,760 shading units, 680 TMUs, 176 ROPs, 170 RT cores, and 680 tensor cores. Pixel rate is 0 MPixel/s for AMD and 423.6 GPixel/s for NVIDIA. Texture rate is 2,553.6 GTexel/s for AMD and 1,636.8 GTexel/s for NVIDIA. FP32 and FP16 are 81.72 TFLOPS for AMD and 104.8 TFLOPS for NVIDIA, both at 1:1 ratios.

Power and form factor: the MI325X has a 1000 W TDP, OAM module slot, no power connectors, and a 1400 W suggested PSU. The RTX 5090 has a 575 W TDP, dual-slot width, one 16-pin connector, and a 950 W suggested PSU. Display outputs: none for the MI325X; 1x HDMI 2.1b and 3x DisplayPort 2.1b for the RTX 5090. APIs: N/A for AMD; DirectX 12 Ultimate, OpenGL 4.6, and Vulkan 1.4 for NVIDIA.

Release dates: the MI325X launched 2024-10-09; the RTX 5090 launched 2025-01-29. The RTX 5090 has an active production status and a launch MSRP of 1,999 USD. The MI325X has no production status and no price. The RTX 5090 measures 304 mm by 137 mm by 40 mm; the MI325X has no recorded dimensions. The RTX 5090's predecessor is GeForce 40 and successor is GeForce 60; the MI325X's predecessor is Radeon Instinct with no successor listed.