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NVIDIA GeForce RTX 5080vsAMD Radeon RX 7900 XTX

Both GPUs launched at $999, but they take very different technological paths. The RTX 5080 brings newer Blackwell architecture and GDDR7 memory, while the RX 7900 XTX relies on more video memory and a wider bus.

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Intro

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Best for

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Biggest differences

  • Shader cores

    NVIDIA GeForce RTX 5080 leads

    +75%

    higher is better

    • NVIDIA GeForce RTX 508010,752 cores
    • AMD Radeon RX 7900 XTX6,144 cores

  • Video memory

    AMD Radeon RX 7900 XTX leads

    +50%

    higher is better

    • NVIDIA GeForce RTX 508016 GB
    • AMD Radeon RX 7900 XTX24 GB

  • Memory bus width

    AMD Radeon RX 7900 XTX leads

    +50%

    higher is better

    • NVIDIA GeForce RTX 5080256 bit
    • AMD Radeon RX 7900 XTX384 bit

  • Memory speed

    NVIDIA GeForce RTX 5080 leads

    +50%

    higher is better

    • NVIDIA GeForce RTX 508030 Gbps
    • AMD Radeon RX 7900 XTX20 Gbps

Where each one wins

  • NVIDIA GeForce RTX 5080

    • Shader cores
    • Boost clock
    • Memory type
    • Memory speed
    • PCIe version
    • HDMI version
    • DisplayPort version
    • DisplayPort outputs
    • Slot width

  • AMD Radeon RX 7900 XTX

    • FP32 compute
    • Video memory
    • Memory bus width
    • Last-level cache
    • Board power
    • Recommended PSU
    • Card length

What both have

  • Launch price999 USD
  • Memory bandwidth960 GB/s
  • PCIe lanes16 lanes
  • HDMI outputs1 ports
  • Max displays4 displays
  • Hardware encodeH.264, HEVC, AV1
  • Video encoders2 encoders

Every spec

Red marks the better value in each row.

SpecNVIDIA GeForce RTX 5080AMD Radeon RX 7900 XTX
Overview

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Overview specs

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Release date2025-012022-121
Launch price999 USD999 USD2
Graphics chip

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Graphics chip specs

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ArchitectureBlackwellRdna 3
Shader cores10,752 cores6,144 cores
Boost clock2,620 MHz2,500 MHz3
Base clock2,300 MHzNot published
FP32 compute56.3 TFLOPS61.4 TFLOPS
Memory

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Memory specs

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Video memory16 GB24 GB
Memory typeGddr7Gddr6
Memory bus width256 bit384 bit
Memory bandwidth960 GB/s960 GB/s4
Memory speed30 Gbps20 Gbps
Last-level cache64 MB96 MB
Power

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Power specs

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Board power360 W355 W
Recommended PSU850 W5800 W6
Power connectors12V-2x68-pin7
Interface

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Interface specs

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PCIe version5.04.0
PCIe lanes16 lanes16 lanes
Display outputs

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Display outputs specs

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HDMI version2.1b2.1
DisplayPort version2.1b82.19
HDMI outputs1 ports1 ports
DisplayPort outputs3 ports2 ports
Max displays4 displays4 displays
Video engine

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Video engine specs

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Hardware encodeH.264, HEVC, AV1H.264, HEVC, AV110
Video encoders2 encoders2 encoders11
Size

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Size specs

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Card length304 mm287 mm
Card height137 mmNot published
Slot width2 slots122.5 slots
Notes on 12 values — test conditions and caveats
  1. 1AMD Radeon RX 7900 XTX, Release date: First retail sale December 13, 2022; announced November 3, 2022.
  2. 2AMD Radeon RX 7900 XTX, Launch price: AMD's launch figure is the SEP (suggested e-commerce price); partner cards often sold higher.
  3. 3AMD Radeon RX 7900 XTX, Boost clock: Boost is a burst maximum; typical gaming runs near the 2300 MHz game clock.
  4. 4AMD Radeon RX 7900 XTX, Memory bandwidth: AMD also quotes 3500 GB/s 'effective' bandwidth with Infinity Cache; 960 GB/s is the raw VRAM figure.
  5. 5NVIDIA GeForce RTX 5080, Recommended PSU: NVIDIA's minimum for a PC with a Ryzen 9 9950X; it recommends a PCIe CEM 5.1 compliant PSU.
  6. 6AMD Radeon RX 7900 XTX, Recommended PSU: AMD's 800W minimum assumes a Ryzen 9 5900X-class system; other builds may need more headroom.
  7. 7AMD Radeon RX 7900 XTX, Power connectors: The reference card uses two 8-pin connectors.
  8. 8NVIDIA GeForce RTX 5080, DisplayPort version: DisplayPort 2.1b at UHBR20 on all three DP outputs.
  9. 9AMD Radeon RX 7900 XTX, DisplayPort version: DisplayPort 2.1 runs UHBR 13.5, up to 54Gbps of display link bandwidth per AMD.
  10. 10AMD Radeon RX 7900 XTX, Hardware encode: AMD's spec table marks 4K H264 Encode, H265/HEVC Encode and AV1 Encode all as Yes.
  11. 11AMD Radeon RX 7900 XTX, Video encoders: AMD describes a Dual Media Engine, i.e. two encode/decode engines, capable of simultaneous 8K60 HEVC streams.
  12. 12NVIDIA GeForce RTX 5080, Slot width: The card is 2-slot (40 mm thick), but NVIDIA's install guide asks for 3-slot (61 mm) case clearance.

Performance and Architecture

The RTX 5080 surges ahead with 10,752 shader cores and a 2,620 MHz boost clock, yielding faster raw processing speeds than its rival. It also adopts PCIe 5.0 for higher bandwidth potential.

The RX 7900 XTX counters with 61.4 TFLOPS of FP32 compute and a 96 MB last-level cache, maintaining strong performance in raw compute tasks despite older Rdna 3 architecture and a PCIe 4.0 interface.

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Performance and Architecture

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Memory and Resolution

The RX 7900 XTX equips 24 GB of GDDR6 memory across a 384-bit bus, giving it a wider highway for high-resolution texture loads. Its 96 MB cache helps maintain data throughput.

The RTX 5080 offers 16 GB of video memory, but it uses faster GDDR7 type running at 30 Gbps on a 256-bit bus, achieving a 960 GB/s bandwidth that matches the AMD card while processing data much quicker per second.

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Memory and Resolution

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Display and Power

NVIDIA updates its connectivity with HDMI 2.1b and DisplayPort 2.1b across three DisplayPort outputs, letting you drive up to four modern displays. The reference card draws 360 W and requires an 850 W power supply.

AMD includes HDMI 2.1 and two DisplayPort 2.1 outputs, alongside two encode and decode engines capable of simultaneous 8K60 HEVC streams. Its board power sits slightly lower at 355 W, needing an 800 W minimum PSU.

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Display and Power

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The Verdict

Buy the NVIDIA GeForce RTX 5080 if you want newer architecture, faster GDDR7 memory, and advanced PCIe 5.0 support. Buy the AMD Radeon RX 7900 XTX if you prioritize a larger 24 GB frame buffer and a wider memory bus for heavy resolutions.

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Verdict

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Where to buy

FAQ

Which graphics card has more video memory?

The AMD Radeon RX 7900 XTX includes 24 GB of video memory, compared to the 16 GB found on the NVIDIA GeForce RTX 5080.

What power supply do these GPUs require?

NVIDIA recommends an 850 W power supply for its card, while AMD suggests an 800 W minimum PSU depending on your system configuration.

Do both cards support AV1 hardware encoding?

Yes, both graphics cards feature hardware encoding for H.264, HEVC, and AV1 formats.

What is the physical size difference?

The AMD card is shorter at 287 mm compared to the 304 mm length of the NVIDIA card.

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FAQ

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