Radeon Instinct MI300X vs RX 6600 XT

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Primary details

GPU architecture, market segment, value for money and other general parameters compared.

Place in the ranking90not rated
Place by popularity93not in top-100
Cost-effectiveness evaluation62.98no data
Power efficiency18.36no data
ArchitectureRDNA 2.0 (2020−2024)CDNA 3.0 (2023−2024)
GPU code nameNavi 23Aqua Vanjaram
Market segmentDesktopWorkstation
Release date30 July 2021 (3 years ago)6 December 2023 (1 year ago)
Launch price (MSRP)$379 no data

Cost-effectiveness evaluation

Performance to price ratio. The higher, the better.

no data

Detailed specifications

General parameters such as number of shaders, GPU core base clock and boost clock speeds, manufacturing process, texturing and calculation speed. Note that power consumption of some graphics cards can well exceed their nominal TDP, especially when overclocked.

Pipelines / CUDA cores204819456
Core clock speed1968 MHz1000 MHz
Boost clock speed2589 MHz2100 MHz
Number of transistors11,060 million153,000 million
Manufacturing process technology7 nm5 nm
Power consumption (TDP)160 Watt750 Watt
Texture fill rate331.42,554
Floating-point processing power10.6 TFLOPS81.72 TFLOPS
ROPs64no data
TMUs1281216
Tensor Coresno data1216
Ray Tracing Cores32no data

Form factor & compatibility

Information on compatibility with other computer components. Useful when choosing a future computer configuration or upgrading an existing one. For desktop graphics cards it's interface and bus (motherboard compatibility), additional power connectors (power supply compatibility).

InterfacePCIe 4.0 x8PCIe 5.0 x16
Length190 mmno data
Width2-slotOAM Module
Supplementary power connectors1x 8-pinNone

VRAM capacity and type

Parameters of VRAM installed: its type, size, bus, clock and resulting bandwidth. Integrated GPUs have no dedicated video RAM and use a shared part of system RAM.

Memory typeGDDR6HBM3
Maximum RAM amount8 GB192 GB
Memory bus width128 Bit8192 Bit
Memory clock speed2000 MHz2525 MHz
Memory bandwidth256.0 GB/s5,171 GB/s
Shared memory--

Connectivity and outputs

Types and number of video connectors present on the reviewed GPUs. As a rule, data in this section is precise only for desktop reference ones (so-called Founders Edition for NVIDIA chips). OEM manufacturers may change the number and type of output ports, while for notebook cards availability of certain video outputs ports depends on the laptop model rather than on the card itself.

Display Connectors1x HDMI, 2x DisplayPortNo outputs
HDMI+-

API compatibility

List of supported 3D and general-purpose computing APIs, including their specific versions.

DirectX12.0 Ultimate (12_2)N/A
Shader Model6.5N/A
OpenGL4.6N/A
OpenCL2.13.0
Vulkan1.2N/A

Pros & cons summary


Recency 30 July 2021 6 December 2023
Maximum RAM amount 8 GB 192 GB
Chip lithography 7 nm 5 nm
Power consumption (TDP) 160 Watt 750 Watt

RX 6600 XT has 368.8% lower power consumption.

Instinct MI300X, on the other hand, has an age advantage of 2 years, a 2300% higher maximum VRAM amount, and a 40% more advanced lithography process.

We couldn't decide between Radeon RX 6600 XT and Radeon Instinct MI300X. We've got no test results to judge.

Be aware that Radeon RX 6600 XT is a desktop card while Radeon Instinct MI300X is a workstation one.


Should you still have questions concerning choice between the reviewed GPUs, ask them in Comments section, and we shall answer.

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AMD Radeon RX 6600 XT
Radeon RX 6600 XT
AMD Radeon Instinct MI300X
Radeon Instinct MI300X

Comparisons with similar GPUs

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Community ratings

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4.3 4341 vote

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3.5 59 votes

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Questions & comments

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