Radeon RX 7990 XTX vs RX 6900 XTX

VS

Primary details

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

Place in the rankingnot ratednot rated
Place by popularitynot in top-100not in top-100
ArchitectureRDNA 2.0 (2020−2024)RDNA 3.0 (2022−2024)
GPU code nameNavi 21Navi 31
Market segmentDesktopDesktop
Release date28 October 2020 (4 years ago)2023 (1 year ago)

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 cores51206144
Core clock speed2075 MHz2500 MHz
Boost clock speed2435 MHz3599 MHz
Number of transistors26,800 million57,700 million
Manufacturing process technology7 nm5 nm
Power consumption (TDP)330 Watt405 Watt
Texture fill rate779.21,382
Floating-point processing power24.93 TFLOPS88.45 TFLOPS
ROPs128192
TMUs320384
Ray Tracing Cores8096

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 x16PCIe 4.0 x16
Length267 mm287 mm
Width2-slot3-slot
Supplementary power connectors2x 8-pin3x 8-pin

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 typeGDDR6GDDR6
Maximum RAM amount16 GB24 GB
Memory bus width256 Bit384 Bit
Memory clock speed2250 MHz3000 MHz
Memory bandwidth576.0 GB/s1.15 TB/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 Connectors1x HDMI 2.1, 2x DisplayPort 1.4a, 1x USB Type-C1x HDMI 2.1a, 2x DisplayPort 2.1, 1x USB Type-C
HDMI++

API compatibility

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

DirectX12 Ultimate (12_2)12 Ultimate (12_2)
Shader Model6.76.7
OpenGL4.64.6
OpenCL2.12.2
Vulkan1.31.3

Pros & cons summary


Maximum RAM amount 16 GB 24 GB
Chip lithography 7 nm 5 nm
Power consumption (TDP) 330 Watt 405 Watt

RX 6900 XTX has 22.7% lower power consumption.

RX 7990 XTX, on the other hand, has a 50% higher maximum VRAM amount, and a 40% more advanced lithography process.

We couldn't decide between Radeon RX 6900 XTX and Radeon RX 7990 XTX. We've got no test results to judge.


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

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite graphics card.


AMD Radeon RX 6900 XTX
Radeon RX 6900 XTX
AMD Radeon RX 7990 XTX
Radeon RX 7990 XTX

Comparisons with similar GPUs

We selected several comparisons of graphics cards with performance close to those reviewed, providing you with more options to consider.

Community ratings

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


3.2 128 votes

Rate Radeon RX 6900 XTX on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5
4.2 404 votes

Rate Radeon RX 7990 XTX on a scale of 1 to 5:

  • 1
  • 2
  • 3
  • 4
  • 5

Questions & comments

Here you can ask a question about this comparison, agree or disagree with our judgements, or report an error or mismatch.