Radeon Instinct MI300X vs GeForce 6800 Ultra

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Primary details

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

Place in the ranking1280not rated
Place by popularitynot in top-100not in top-100
Power efficiency0.30no data
ArchitectureCurie (2003−2013)CDNA 3.0 (2023−2024)
GPU code nameNV45Aqua Vanjaram
Market segmentDesktopWorkstation
Release date26 July 2004 (20 years ago)6 December 2023 (1 year ago)
Launch price (MSRP)$499 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 coresno data19456
Core clock speed425 MHz1000 MHz
Boost clock speedno data2100 MHz
Number of transistors222 million153,000 million
Manufacturing process technology130 nm5 nm
Power consumption (TDP)81 Watt750 Watt
Texture fill rate6.8002,554
Floating-point processing powerno data81.72 TFLOPS
ROPs16no data
TMUs161216
Tensor Coresno data1216

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 1.0 x16PCIe 5.0 x16
Length197 mmno data
Width2-slotOAM Module
Supplementary power connectors1x 6-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 typeGDDR3HBM3
Maximum RAM amount256 MB192 GB
Memory bus width256 Bit8192 Bit
Memory clock speed550 MHz2525 MHz
Memory bandwidth35.2 GB/s5,171 GB/s

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 Connectors2x DVI, 1x S-VideoNo outputs

API compatibility

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

DirectX9.0c (9_3)N/A
Shader Model3.0N/A
OpenGL2.1N/A
OpenCLN/A3.0
VulkanN/AN/A

Pros & cons summary


Recency 26 July 2004 6 December 2023
Maximum RAM amount 256 MB 192 GB
Chip lithography 130 nm 5 nm
Power consumption (TDP) 81 Watt 750 Watt

6800 Ultra has 825.9% lower power consumption.

Instinct MI300X, on the other hand, has an age advantage of 19 years, a 76700% higher maximum VRAM amount, and a 2500% more advanced lithography process.

We couldn't decide between GeForce 6800 Ultra and Radeon Instinct MI300X. We've got no test results to judge.

Be aware that GeForce 6800 Ultra 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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NVIDIA GeForce 6800 Ultra
GeForce 6800 Ultra
AMD Radeon Instinct MI300X
Radeon Instinct MI300X

Comparisons with similar GPUs

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Community ratings

Here you can see the user ratings of the compared graphics cards, as well as rate them yourself.


3.7 16 votes

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3.5 59 votes

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Questions & comments

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