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NVIDIA GeForce RTX 5080vsIntel Arc B580: GPU Showdown

The NVIDIA GeForce RTX 5080 and the Intel Arc B580 both feature dual hardware video encoders and support four displays. Choosing between them comes down to a massive disparity in raw power, memory specifications, and price.

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Intro

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Best for

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Biggest differences

  • Shader cores

    NVIDIA GeForce RTX 5080 leads

    4.2×

    higher is better

    • NVIDIA GeForce RTX 508010,752 cores
    • Intel Arc B5802,560 cores

  • Launch price

    Intel Arc B580 leads

    4.01×

    lower is better

    • NVIDIA GeForce RTX 5080999 USD
    • Intel Arc B580249 USD

  • Memory bandwidth

    NVIDIA GeForce RTX 5080 leads

    2.11×

    higher is better

    • NVIDIA GeForce RTX 5080960 GB/s
    • Intel Arc B580456 GB/s

  • PCIe lanes

    NVIDIA GeForce RTX 5080 leads

    2×

    higher is better

    • NVIDIA GeForce RTX 508016 lanes
    • Intel Arc B5808 lanes

Where each one wins

  • NVIDIA GeForce RTX 5080

    • Shader cores
    • Video memory
    • Memory type
    • Memory bus width
    • Memory bandwidth
    • Memory speed
    • Last-level cache
    • PCIe version
    • PCIe lanes
    • HDMI version
    • DisplayPort version

  • Intel Arc B580

    • Launch price
    • Boost clock
    • Board power
    • Recommended PSU
    • Card length
    • Card height

What both have

  • HDMI outputs1 ports
  • DisplayPort outputs3 ports
  • Max displays4 displays
  • Hardware encodeH.264, HEVC, AV1
  • Video encoders2 encoders
  • Slot width2 slots

Every spec

Red marks the better value in each row.

SpecNVIDIA GeForce RTX 5080Intel Arc B580
Overview

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Overview specs

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Release date2025-012024-12
Launch price999 USD249 USD
Graphics chip

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Graphics chip specs

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ArchitectureBlackwellXe2
Shader cores10,752 cores2,560 cores
Boost clock2,620 MHz2,670 MHz
Base clock2,300 MHzNot published
FP32 compute56.3 TFLOPSNot published
Memory

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Memory specs

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Video memory16 GB12 GB
Memory typeGddr7Gddr6
Memory bus width256 bit192 bit
Memory bandwidth960 GB/s456 GB/s
Memory speed30 Gbps19 Gbps
Last-level cache64 MB18 MB
Power

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Power specs

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Board power360 W190 W
Recommended PSU850 W1600 W
Power connectors12V-2x68-pin
Interface

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Interface specs

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PCIe version5.04.0
PCIe lanes16 lanes8 lanes
Display outputs

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Display outputs specs

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HDMI version2.1b2.1
DisplayPort version2.1b22.13
HDMI outputs1 ports1 ports
DisplayPort outputs3 ports3 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, AV14
Video encoders2 encoders2 encoders
Size

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Size specs

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Card length304 mm272 mm
Card height137 mm115 mm5
Slot width2 slots62 slots
Notes on 6 values — test conditions and caveats
  1. 1NVIDIA 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.
  2. 2NVIDIA GeForce RTX 5080, DisplayPort version: DisplayPort 2.1b at UHBR20 on all three DP outputs.
  3. 3Intel Arc B580, DisplayPort version: Intel rates the DisplayPort outputs at DP 2.1 up to UHBR 13.5 (second output listed at UHBR 10).
  4. 4Intel Arc B580, Hardware encode: Intel's spec table also lists H.264 and H.265 (HEVC) hardware encode as Yes.
  5. 5Intel Arc B580, Card height: Intel publishes this dimension as the card's 'Width' (115 mm) alongside the 272 mm length.
  6. 6NVIDIA 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 Memory

The NVIDIA GeForce RTX 5080 delivers elite graphics processing backed by 16 GB of GDDR7 video memory across a 256-bit bus, achieving a massive 960 GB/s of bandwidth. It utilizes the Blackwell architecture with 10,752 shader cores to handle heavy computational tasks.

In contrast, the Intel Arc B580 relies on the Xe2 architecture with 2,560 shader cores and 12 GB of GDDR6 memory on a 192-bit bus. Its memory bandwidth sits lower at 456 GB/s, making it suited for less demanding workloads.

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Performance and Memory

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Power and System Requirements

System compatibility requires careful attention due to vastly different power demands. The NVIDIA card draws 360 W and requires an 850 W power supply unit along with a 12V-2x6 power connector.

On the other side, the Intel card demands significantly less energy with a 190 W board power and a modest 600 W recommended PSU using a standard 8-pin connector.

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Power and System Requirements

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Dimensions and Physical Fit

Physical dimensions dictate case compatibility for these graphics cards. The NVIDIA GeForce RTX 5080 measures 304 mm long by 137 mm high, occupying 2 slots while requesting 3-slot case clearance.

The Intel Arc B580 offers a more compact build measuring 272 mm long and 115 mm wide, maintaining a strict 2-slot footprint that fits tighter PC chassis easily.

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Dimensions and Physical Fit

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The Verdict

Buy the NVIDIA GeForce RTX 5080 if you need extreme multi-gigabyte memory bandwidth and top-tier shader core counts. Buy the Intel Arc B580 if you want a budget-friendly option with lower power consumption.

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Verdict

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Where to buy

FAQ

What are the launch prices for these graphics cards?

The NVIDIA GeForce RTX 5080 launches at $999 USD, while the Intel Arc B580 arrives at $249 USD.

Which card has faster memory technology?

The NVIDIA GeForce RTX 5080 uses GDDR7 memory operating at 30 Gbps, whereas the Intel Arc B580 uses GDDR6 memory running at 19 Gbps.

Do both cards support PCIe 5.0?

Only the NVIDIA GeForce RTX 5080 supports PCIe 5.0 with 16 lanes, while the Intel Arc B580 runs on PCIe 4.0 with 8 lanes.

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FAQ

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