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RAM Upgrade Guide — ASUS ROG Strix G15 G513QR (Ryzen 9 5900HX, RTX 3070)

Your machine: 2 SO-DIMM slots, DDR4-3200 (PC4-25600), 64 GB ceiling. Both slots are currently filled with 2× 8 GB, so any upgrade means replacing both sticks — there is no free slot to add to.

✅ 64 GB verified compatible (2026-06-24). Your laptop's firmware reports a "32 GB max," but that is ASUS's conservative 2021 spec label hardcoded into SMBIOS — a deprecated, OEM-supplied value, not a hardware limit. The Ryzen 9 5900HX officially supports 64 GB; ASUS shipped this exact chassis with 64 GB from the factory; and Crucial, Kingston, A-Tech & Adamanta all certify 64 GB kits for the G513QR. Confirmed by independent adversarial fact-check.

⚠️ Critical: buy native 1.2 V JEDEC, NOT a 1.35 V "XMP" kit. On this AMD platform a 1.35 V/XMP-only SO-DIMM downclocks to ~2666 MHz. The kits below are all native 1.2 V JEDEC and run at full 3200. Avoid Crucial Ballistix / anything labeled "XMP" or "1.35 V".

🔧 BIOS: yours is v331 (2023); latest is v335 (2025-12-24) via ASUS EZ Flash. Not required for 32 GB modules, but recommended hygiene before/after the swap.

(A) Buying Guide

Spec checklist — every box must match

Spec Required value
Memory type DDR4 (NOT DDR4L, NOT DDR5)
Form factor SO-DIMM, 260-pin (laptop)
Speed 3200 MT/s (PC4-25600)
Voltage 1.2 V
CAS latency CL22 (Crucial) or CL20 (Kingston Fury) — both fine
ECC / register Non-ECC, unbuffered
  • Buy a matched dual-channel kit (one box, two sticks). The 5900HX runs dual-channel; two identical sticks guarantee it. Don't mix old 8 GB sticks with new.
  • Over-spec sticks just downclock. A 3600 kit runs at 3200 here — no benefit, so buy 3200. CL20 vs CL22 is negligible.

64 GB (2× 32 GB) — the max

  • Primary: Crucial CT2K32G4SFD832A — 2×32 GB, DDR4-3200, CL22, 1.2 V, 260-pin, non-ECC. Exactly what Crucial's tool certifies for the G513QR. ~€110–150.
  • Alt: Kingston FURY Impact KF432S20IBK2/64 — 2×32 GB, CL20. ~€120–160.

32 GB (2× 16 GB) — value sweet spot

  • Primary: Crucial CT2K16G4SFRA32A — 2×16 GB, DDR4-3200, CL22, 1.2 V, 260-pin, non-ECC. ~€45–70.
  • Alt: Kingston FURY Impact KF432S20IBK2/32 — 2×16 GB, CL20. ~€50–75.

For gaming + RTX 3070, 32 GB is the practical sweet spot. Go 64 GB only for VMs, large datasets, heavy content creation, or many memory-hungry apps at once. Given your ~42 GB commit charge, 64 GB is justified for your actual workload.

Sources

  • Crucial compatibility tool: https://www.crucial.com/compatible-upgrade-for/asus/rog-strix-g513
  • Crucial 64 GB kit: https://www.crucial.com/memory/ddr4/ct2k32g4sfd832a
  • Crucial 32 GB kit: https://www.crucial.com/memory/ddr4/ct2k16g4sfra32a
  • Belgium listing (Crucial 64 GB): https://www.amazon.com.be/-/en/Crucial-CT2K32G4SFD832A-3200MHz-2933MHz-2666MHz/dp/B07ZLCVKPV

(B) Installation Guide

Tools & prep

  • #0 (PH0) Phillips screwdriver (magnetized if possible).
  • Plastic pry tool / guitar pick / old card — never metal to pry.
  • Magnetic tray / labeled cups for screws.
  • Anti-static: hard non-carpet surface, touch bare grounded metal (or wrist strap) before handling RAM, hold sticks by the edges — never contacts/chips.

Step 1 — Pre-work

  1. Back up anything critical.
  2. Fully shut down (Start → Power → Shut down). For a truly cold state, hold Shift while clicking Shut down.
  3. Unplug AC and any USB-C power.
  4. ASUS recommends running the battery to ≤25% before opening.
  5. Hold the power button ~10–15 s to discharge residual power.

Step 2 — Remove the bottom panel

  1. Lid closed, laptop face-down on a soft cloth.
  2. Remove the 11 Phillips screws. Screw lengths can differ by position — keep them organized.
  3. One screw is captive — it loosens but won't fully come out. Don't force it.
  4. No glue; the panel is held by clips. Start at a corner, insert the pry tool at a shallow angle, and work around releasing clips slowly.
  5. CRITICAL: the panel is tethered by RGB LED ribbon cable(s). Lift only a few cm, then disconnect the LED ribbon before fully removing the panel.
  • Unplug the battery connector from the motherboard so the slots are unpowered. Reconnect last.

Step 4 — Swap the RAM

  1. Find the two SO-DIMM slots near center, beside the heatpipes, under a silver heat-shield/sticker.
  2. Peel the shield back (don't fully remove) to expose modules.
  3. Each old stick: push the two side clips outward → stick pops to ~30° → pull straight out by the edges.
  4. New stick: align the notch with the slot key, insert at ~30°, then press down flat until both clips snap. Repeat for the second. Confirm both fully seated and level.
  5. Re-lay the heat-shield/sticker.

Step 5 — Reassemble

  1. Reconnect the LED ribbon (and battery connector last).
  2. Align panel, press edges until clips click.
  3. Reinstall all 11 screws (right screw, right hole, don't over-tighten).

Step 6 — First boot

  • Reconnect AC, power on. First POST may take 20–40 s longer with a black screen while memory retrains — normal. If no boot, reseat the sticks (#1 cause is a not-fully-clicked stick).

Step 7 — Verify

  1. BIOS: tap F2/Del at the ASUS logo → Total Memory = 65536 MB / 64 GB.
  2. Windows — Task Manager → Performance → Memory: capacity 64.0 GB, Speed 3200 MHz, Slots used 2 of 2.
  3. PowerShell (read-only): 
    Get-CimInstance Win32_PhysicalMemory | Select-Object DeviceLocator, Capacity, Speed, Manufacturer, PartNumber
    Each Capacity = 34359738368 (32 GB), Speed = 3200.

Warranty note

ASUS treats memory/storage as user-upgradeable on ROG Strix laptops (official upgrade guide + user-accessible memory). In the EU/Belgium, opening the laptop to upgrade RAM cannot void your statutory legal guarantee; "warranty void" stickers aren't enforceable against EU consumer rights for user-serviceable parts. But damage you cause during the swap isn't covered — photograph seals first and check your ASUS Belgium terms.

Sources

  • ASUS official RAM/SSD upgrade guide: https://rog.asus.com/articles/guides/how-to-upgrade-the-ram-and-ssd-of-your-rog-strix-laptop/
  • LaptopMedia teardown: https://laptopmedia.com/highlights/inside-asus-rog-strix-g15-g513-disassembly-and-upgrade-options/
  • ASUS G513 service guide (PDF): https://documents.cdn.ifixit.com/oKCDWCgQLxt13uAE.pdf
  • iFixit device page: https://www.ifixit.com/Device/ASUS_ROG_Strix_G15_G513

Bottom line: For your workload (~42 GB commit on 16 GB), the Crucial CT2K32G4SFD832A 2×32 GB (64 GB) is the right target. Install is ~15 min: 11 screws, mind the LED ribbon, swap both sticks at 30°, then verify 64 GB @ 3200 MHz.

(C) Live price comparison → Belgium (June 2026)

⚠️ DDR4 surged hard in 2026 (this kit peaked ~$666 in Jan 2026). The €45–150 estimates earlier in this doc are PRE-surge — use the verified current prices below.

64 GB — Crucial CT2K32G4SFD832A | Price | Where | Notes | |---|---|---| | ~€452–459 | Geizhals DE/EU floor | unnamed small DE shop + shipping | | €510.99 ✅ | bol.com (in stock, ships BE) | cheapest fully-verified buy |

32 GB — Crucial CT2K16G4SFRA32A | Price | Where | Notes | |---|---|---| | ~€229 | Geizhals DE floor | + shipping | | €239 ✅ | Megekko.nl (in stock, next-day) | cheapest verified named buy | | €256 | bol.com | easy BE delivery |

Kingston FURY is no cheaper (64 GB Kingston ~€927 — avoid). Ordering DE/FR saves only ~€10–25 vs NL — not worth the hassle.

(D) Cheaper route — buy used / salvage

Used meaningfully undercuts surged-new. Verified-safe only if it's 1.2 V JEDEC DDR4-3200 SO-DIMM, 260-pin, non-ECC, non-XMP.

Path 32 GB (2×16) 64 GB (2×32) Where
Used kits (best value) €90–130 €160–300 2dehands.be / 2ememain.be (BE), Marktplaats.nl (ships BE ~€5), Kleinanzeigen.de (floor ~€65), Leboncoin.fr
eBay "tested pulls" (buyer protection) €60–90 + ship €150–180 + ship befr.ebay.be, ebay.de — filter Used + "tested" + seller ≥98%, prefer EU sellers (no customs)
Broken-laptop harvest rarely beats buying a kit rarely worth it only if donor is cheap AND has confirmed socketed 2×16/2×32 SO-DIMM, or you resell the other parts

Used safety checklist: reject anything 1.35 V / XMP-only / DDR4L / LPDDR4 / ECC / desktop DIMM (288-pin); buy a matched pair (same brand + part# + rank, 1Rx8 vs 2Rx8); demand a label or CPU-Z photo before paying; prefer buyer-protected platforms (eBay Money-Back, 2dehands "veilig betalen"); run MemTest86 3–4 passes after install. Watch for relabeled fakes — stick to Samsung / SK Hynix / Micron-Crucial / Kingston.

Verdict: Used 32 GB ≈ €90–130 (vs €239 new) and used 64 GB ≈ €160–300 (vs €480 new) — both ~40–60% savings. Buy a used matched kit (not random singles) via 2dehands/Marktplaats or eBay tested-pulls; skip the broken-laptop harvest unless you stumble on a genuinely cheap dead unit with confirmed socketed RAM of the right capacity. To verify a donor laptop's RAM is socketed (not soldered), run its exact model through the Crucial compatibility tool — if it shows SO-DIMM upgrades, it's harvestable.