buildOur unit of comparison is an exact component and purchase package: manufacturer, model/MPN, variant, revision, region, condition and quantity. A related product name is not proof of an exact match.
Facts have sources and dates.
Component pages link the manufacturer page, datasheet or identified merchant page for each recorded claim and show when it was observed. “Unknown” means we have not established that fact. When sources disagree, we retain both claims and mark the effective fact as conflicting; we do not pick the smaller dimension to make a part fit.
The initial specifications were observed November 8, 2026. A source check is not an independent bench test. We use exact-model product images from manufacturer and retailer listings. Image credits retain each source and distinguish published manufacturer permissions from preview references awaiting public reuse review. A product photograph does not establish current inventory, a store partnership or the contents of a purchase package.
Prices need the whole offer.
A current eligible quote must have a reviewed exact-package match, a valid price in US dollars for the US region, known in-stock status and an original observation no more than 24 hours old and not in the future. A newer observation for the same listing supersedes an older one, including an unavailable observation. Import time never refreshes the original quote date.
Public product-page checks record the exact advertised unit price, source date, market, stock and purchase scope. A main visible price can disagree with structured markup; we retain that discrepancy and reject accessory, redirected or mismatched product prices. Dated or unavailable observations are only shown with their context. A component quote does not establish a complete delivered basket. Shipping, tax and rebates remain separate. An unknown amount is never treated as zero.
Ordering and comparison.
The component library defaults to name order. You can sort by a category’s named specification or matching offer price; unknown values sort last. Price, merchant and stock filters must all match the same offer. We do not publish a universal performance, bottleneck or value score, and we do not sort by commission.
Comparison shows exact recorded facts and a temporary replacement check. It changes your build only when you apply the replacement. Remedies identify the check they address, any remaining conflicts and whether a current cash difference is known.
A matching socket is one check.
Results are per check: compatible for recorded facts, incompatible, conditional or unknown. The builder compares platform, DIMM/M.2 counts, nominal physical envelopes, user layout assumptions and a power planning reference. Matching sockets do not verify the installed BIOS. Rated RAM speed does not certify a stable profile. A case’s nominal GPU clearance does not establish the space behind your radiator or power cable.
The memory QVL explorer matches full manufacturer part numbers to official source records. Published CPU families, memory version codes, board revisions, BIOS, DIMM population and profiles remain conditions. One kit listing does not establish mixed-kit operation. Missing listings and inaccessible or incomplete documents remain unknown, not incompatible. Exact firmware support, unresolved QVL scopes, cable inventories, lateral clearance, headers, lane sharing, boost/transient power and full installation behavior remain unresolved where stated. Read the exact component manuals and support lists before buying or assembling. No single overall “all compatible” certification is issued.
Your bill and your saved plan.
User-entered quotes are labeled separately from retailer observations. Already-owned quantities reduce purchase cash. Foreign-currency figures remain in their original currency and are excluded from US dollar totals. An extra instant/bundle discount applies once; conditional rebates stay outside immediate cash. Percentage tax uses the displayed known-goods base and is an editable scenario assumption.
Incomplete prices, required components, tax, shipping or allowances prevent a complete cash total. A known subtotal is partial. Saved snapshot observations retain their dates and are not imported as live offers. We recalculate current quote eligibility and fit checks when you load a plan.
Review and corrections.
Reference guides explain the choices and their limits with source dates. We claim no measured FPS or system performance for those combinations. A correction should include the exact MPN, affected page/fact and a primary source. Source changes are reviewed against exact identity before a public fact or offer match is changed.