AMD Instinct MI350X vs AMD Radeon RX 7800 XT Comparison

AMD Instinct MI350X and AMD Radeon RX 7800 XT occupy different corners of the AMD accelerator lineup. The MI350X is a compute-focused module built for data center workloads, while the RX 7800 XT is a consumer graphics card aimed at rasterization and gaming. Direct benchmark comparisons are not recorded in the database for these two products, so the analysis relies on architectural specifications, memory configurations, and the recorded performance scores of the RX 7800 XT.

Head-to-Head Benchmarks

The database contains no head-to-head benchmark entries between the AMD Instinct MI350X and the AMD Radeon RX 7800 XT. The `headToHeadBenchmarks` field is empty, and the wins counters for both products are zero. This absence of direct comparative tests means that a side-by-side score comparison cannot be constructed from recorded measurements. Instead, the available data for the RX 7800 XT provides a standalone performance profile, while the MI350X has no benchmark scores at all, with an average benchmark score of zero and a percentile ranking of 50 among all GPUs.

For the RX 7800 XT, the database lists ten benchmark results. The highest recorded score is in the Geekbench Vulkan test at 54228, followed by the Geekbench OpenCL test at 18290. The 3DMark Steel Nomad DX12 test yields a score of 4157. In Passmark tests, the G3D score reaches 24176, while the GPU compute score is 13473. Lower scores appear in the DirectX 10 test at 121, DirectX 11 at 249, DirectX 12 at 93, and DirectX 9 at 304. The G2D test records 1177. The average benchmark score across all these tests is 11627, and the percentile ranking versus all GPUs is 51.

The nearest rivals for the RX 7800 XT, based on average scores, include the NVIDIA GeForce GTX 1660 with an average score of 11680 and a delta percentage of -0.5, meaning the RX 7800 XT trails that card by half a percent. The AMD Radeon Pro 5500M has an average score of 11528 with a delta of 0.9, placing the RX 7800 XT ahead by 0.9 percent. The NVIDIA Tesla K20c scores 11479 with a delta of 1.3, and the AMD Radeon RX 6500 XT scores 11842 with a delta of -1.8, indicating the RX 7800 XT is 1.8 percent behind that card. These deltas are small, suggesting the RX 7800 XT sits in a tightly contested performance band among these rivals.

Where Each One Wins

Without direct head-to-head data, the win analysis must be inferred from the architectural roles each product serves. The MI350X, with its compute-oriented design, targets workloads where raw parallel throughput and memory capacity dominate. It features 16384 shading units and a texture rate of 2,252.8 GTexel/s, which is roughly four times the texture rate of the RX 7800 XT at 583.2 GTexel/s. The MI350X delivers 72.09 TFLOPS for both FP32 and FP16 operations, while the RX 7800 XT provides 37.32 TFLOPS for each precision. This gives the MI350X a clear advantage in compute-heavy tasks such as large-scale matrix operations or scientific simulations, where the doubling of floating-point throughput matters.

The RX 7800 XT wins in areas tied to conventional graphics output. It has 96 ROPs and a pixel rate of 233.3 GPixel/s, whereas the MI350X reports zero ROPs and a pixel rate of zero MPixel/s. The RX 7800 XT supports display outputs with 1x HDMI 2.1a and 3x DisplayPort 2.1, while the MI350X has no display outputs. For rasterization-based rendering, the RX 7800 XT is the only one of the two that can produce frames for a screen. The MI350X also lacks any API support for DirectX, OpenGL, or Vulkan, all listed as N/A, while the RX 7800 XT supports DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4. This makes the RX 7800 XT the sole option for consumer graphics applications.

Memory capacity favors the MI350X decisively. It carries 288 GB of HBM3e memory on an 8192-bit bus, delivering 8.19 TB/s of bandwidth. The RX 7800 XT has 16 GB of GDDR6 memory on a 256-bit bus, with a bandwidth of 624.1 GB/s. For workloads that require holding massive datasets on the accelerator, the MI350X offers over seventeen times the memory capacity and more than thirteen times the bandwidth. The RX 7800 XT, with its smaller memory pool, suits typical gaming or workstation scenarios where 16 GB is sufficient.

Architecture Differences

The two products use different GPU architectures from AMD. The MI350X is built on CDNA 4.0, a compute-focused architecture, while the RX 7800 XT uses RDNA 3.0, designed for gaming and graphics. The process nodes also differ: the MI350X uses a 3 nm process from TSMC, whereas the RX 7800 XT uses a 5 nm process from the same foundry. The MI350X has a much larger die, measuring 2380 mm², compared to the RX 7800 XT’s 346 mm². Transistor counts reflect this scale: the MI350X has 185,000 million transistors, while the RX 7800 XT has 28,100 million. Transistor density is similar, with the MI350X at 77.7M per mm² and the RX 7800 XT at 81.2M per mm².

Clock speeds differ in configuration. The MI350X has a base clock of 1000 MHz and a boost clock of 2200 MHz, while the RX 7800 XT runs at a base of 1295 MHz, a boost of 2430 MHz, and a game clock of 2124 MHz. The RX 7800 XT operates at higher frequencies, but the MI350X compensates with many more compute units. The MI350X chip is labeled "MI350 256CU," indicating 256 compute units, while the RX 7800 XT uses the Navi 32 chip. The MI350X has 16384 shading units, 1024 TMUs, and no ROPs, while the RX 7800 XT has 3840 shading units, 240 TMUs, and 96 ROPs. The RX 7800 XT also includes 60 ray tracing cores, a feature absent from the MI350X’s specification list.

Memory technology is a major differentiation. The MI350X uses HBM3e memory at a speed of 2000 MHz with an effective rate of 8 Gbps, while the RX 7800 XT uses GDDR6 at 2438 MHz with an effective rate of 19.5 Gbps. The bus widths are 8192 bits for the MI350X and 256 bits for the RX 7800 XT. The power envelope also differs greatly: the MI350X has a TDP of 1000 W and a suggested PSU of 1400 W, while the RX 7800 XT has a TDP of 263 W and a suggested PSU of 600 W. Physical dimensions reflect their form factors: the MI350X is an OAM module measuring 102 mm in length and 165 mm in width, while the RX 7800 XT is a dual-slot card at 267 mm in length, 111 mm in height, and 50 mm in width.

FAQ

Q: Which product has more shading units?

A: The AMD Instinct MI350X has 16384 shading units, compared to 3840 on the AMD Radeon RX 7800 XT.

Q: What is the memory capacity difference between the two?

A: The MI350X has 288 GB of HBM3e memory, while the RX 7800 XT has 16 GB of GDDR6 memory.

Q: Does the MI350X support any display outputs?

A: No, the MI350X lists no display outputs, whereas the RX 7800 XT has 1x HDMI 2.1a and 3x DisplayPort 2.1.

Q: What is the FP32 performance of each product?

A: The MI350X delivers 72.09 TFLOPS for FP32, and the RX 7800 XT delivers 37.32 TFLOPS.

Q: Which product has a higher boost clock?

A: The RX 7800 XT has a boost clock of 2430 MHz, while the MI350X has a boost clock of 2200 MHz.

Q: What are the recorded benchmark scores for the MI350X?

A: The database shows no benchmark scores for the MI350X, with an average benchmark score of zero.

Specification Differences

The following fields differ between the AMD Instinct MI350X and the AMD Radeon RX 7800 XT:

• Architecture: CDNA 4.0 for the MI350X, RDNA 3.0 for the RX 7800 XT.
• Process node: 3 nm for the MI350X, 5 nm for the RX 7800 XT.
• Transistors: 185,000 million for the MI350X, 28,100 million for the RX 7800 XT.
• Die size: 2380 mm² for the MI350X, 346 mm² for the RX 7800 XT.
• Transistor density: 77.7M per mm² for the MI350X, 81.2M per mm² for the RX 7800 XT.
• Base clock: 1000 MHz for the MI350X, 1295 MHz for the RX 7800 XT.
• Boost clock: 2200 MHz for the MI350X, 2430 MHz for the RX 7800 XT.
• Game clock: not specified for the MI350X, 2124 MHz for the RX 7800 XT.
• Memory speed: 2000 MHz 8 Gbps effective for the MI350X, 2438 MHz 19.5 Gbps effective for the RX 7800 XT.
• Memory size: 288 GB for the MI350X, 16 GB for the RX 7800 XT.
• Memory type: HBM3e for the MI350X, GDDR6 for the RX 7800 XT.
• Memory bus width: 8192 bit for the MI350X, 256 bit for the RX 7800 XT.
• Memory bandwidth: 8.19 TB/s for the MI350X, 624.1 GB/s for the RX 7800 XT.
• Shading units: 16384 for the MI350X, 3840 for the RX 7800 XT.
• TMUs: 1024 for the MI350X, 240 for the RX 7800 XT.
• ROPs: 0 for the MI350X, 96 for the RX 7800 XT.
• Ray tracing cores: not specified for the MI350X, 60 for the RX 7800 XT.
• Pixel rate: 0 MPixel/s for the MI350X, 233.3 GPixel/s for the RX 7800 XT.
• Texture rate: 2,252.8 GTexel/s for the MI350X, 583.2 GTexel/s for the RX 7800 XT.
• FP32: 72.09 TFLOPS for the MI350X, 37.32 TFLOPS for the RX 7800 XT.
• FP16: 72.09 TFLOPS for the MI350X, 37.32 TFLOPS for the RX 7800 XT.
• TDP: 1000 W for the MI350X, 263 W for the RX 7800 XT.
• Slot width: OAM Module for the MI350X, Dual-slot for the RX 7800 XT.
• Power connectors: None for the MI350X, 2x 8-pin for the RX 7800 XT.
• Suggested PSU: 1400 W for the MI350X, 600 W for the RX 7800 XT.
• Bus interface: PCIe 5.0 x16 for the MI350X, PCIe 4.0 x16 for the RX 7800 XT.
• Display outputs: No outputs for the MI350X, 1x HDMI 2.1a and 3x DisplayPort 2.1 for the RX 7800 XT.
• API support: DirectX, OpenGL, and Vulkan all N/A for the MI350X; DirectX 12 Ultimate (12_2), OpenGL 4.6, and Vulkan 1.4 for the RX 7800 XT.
• Dimensions: 102 mm length and 165 mm width for the MI350X; 267 mm length, 111 mm height, and 50 mm width for the RX 7800 XT.
• Release date: 2025-06-11 for the MI350X, 2023-09-05 for the RX 7800 XT.
• Production status: not specified for the MI350X, Active for the RX 7800 XT.
• Series: not specified for the MI350X, Radeon RX 7000 series for the RX 7800 XT.
• Chip: MI350 256CU for the MI350X, Navi 32 for the RX 7800 XT.
• Codename: not specified for the MI350X, Wheat Nas for the RX 7800 XT.
• Generation: Instinct (MIx) for the MI350X, Navi III (RX 7000) for the RX 7800 XT.
• Predecessor: Radeon Instinct for the MI350X, Navi II for the RX 7800 XT.
• Successor: not specified for the MI350X, Navi IV for the RX 7800 XT.
• Launch MSRP: not specified for the MI350X, 499 USD for the RX 7800 XT.

The Verdict

The recorded data indicates that the AMD Instinct MI350X is a compute accelerator with no graphics output and no API support, designed for data center tasks that require massive memory capacity and high floating-point throughput. Its 288 GB of HBM3e memory, 8.19 TB/s bandwidth, and 72.09 TFLOPS of FP32 performance position it for workloads that exceed the memory and compute limits of consumer GPUs. The RX 7800 XT, with its 16 GB of GDDR6 memory, 624.1 GB/s bandwidth, and 37.32 TFLOPS, is suited for graphics rendering and gaming, evidenced by its display outputs, ray tracing cores, and API support.

For users with compute-intensive applications that fit within a server or OAM module form factor, the MI350X offers more than double the FP32 throughput and a memory capacity that is an order of magnitude larger. For users needing a card that can output to a display, run DirectX or Vulkan workloads, and operate within a typical desktop power envelope, the RX 7800 XT is the only viable option. The RX 7800 XT’s benchmark scores, such as 54228 in Geekbench Vulkan and 24176 in Passmark G3D, provide a measurable performance baseline, while the MI350X lacks any comparable recorded scores. The choice depends entirely on the workload: the MI350X for raw compute and memory scale, the RX 7800 XT for graphics and consumer applications.