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24GB VRAM planning profile

RTX 3090 for local AI planning

An Ampere 24GB workstation reference for capacity-first local LLM planning.

Source-backed GPU specs availableMedium confidence

Decision snapshot

Where RTX 3090 fits in a shortlist

Profile role

An Ampere 24GB workstation reference for capacity-first local LLM planning.

Reason to consider

It preserves the same broad 24GB memory tier as newer high-end cards while representing an older architecture and board generation.

Main constraint

Age, exact card condition, cooling, and board-specific power details require more attention than the VRAM number alone.

Check workload VRAM firstFollow the GPU selection workflow

RTX 3090 source-backed specification snapshot

Use these values to compare capacity, platform, and board requirements. A specification difference is not presented as a benchmark result.

Planning specifications with source-aware confidence labels
VendorNVIDIA
ArchitectureAmpere
VRAM24 GB
Memory typeGDDR6X
Memory bus384 bit
Memory bandwidth936.2 GB/s
Memory speed19.5 Gbps
CUDA cores10496
Base clock1.4 GHz
Boost clock1.7 GHz
TGP350 W
Board powerNeeds verification

Needs verification from official vendor or trusted manufacturer documentation.

Power consumption350 W
Power connectors1 x 12-pin (reference)
PSU guidanceNeeds verification

Needs verification from official vendor or trusted manufacturer documentation.

Launch year2020

Interpretation

How to read this profile

  • Use this page primarily as a 24GB capacity reference.
  • Compare with RTX 4090 when choosing between the same memory tier across different generations.
  • Do not infer current market value, condition, or performance from this profile.

Decision depth

When RTX 3090 should stay on your shortlist

Use this page to decide whether older 24GB capacity is enough, or whether age, board condition, and generation make a newer route safer.

Use this profile when

  • The workload needs 24GB capacity and the user is comparing older workstation-class planning data.
  • You want a capacity-first NVIDIA reference before evaluating newer high-end cards.
  • You can verify exact card condition, cooling, power setup, and board-partner details outside this profile.

Skip or test first when

  • The user needs current-condition, used-market, price, or availability guidance.
  • Runtime support, power, cooling, or exact board condition cannot be validated.
  • The estimate requires more than 24GB or has a high risk of growing past that tier.

Compare against these profiles next

RTX 4090Same 24GB NVIDIA capacity in a newer architecture and board class.RX 7900 XTXSame 24GB capacity when the user is willing to validate a non-CUDA AMD path.RTX 509032GB step-up when 24GB is no longer a comfortable memory tier.

Compare path

Next GPU profiles to compare with RTX 3090

These routes are selected to keep the decision moving: same-tier comparisons, capacity step-ups, or runtime alternatives. They are not ranked buying recommendations.

Sources behind the RTX 3090 profile

Source coverage includes official vendor material, database cross-checks. Variant-specific values apply only to the named card.

Profile note: Power connector field refers to NVIDIA reference design; AIB models may vary and should be treated as variant-specific.

Available comparisons featuring RTX 3090

RTX 3090 vs RTX 4090 for Local LLM →

Next step

Continue from the question you still need to answer

Need a memory estimate? Open the calculator →Need a wider shortlist? Browse GPU tiers →Need temporary capacity? Review cloud GPU paths →