Data Methodology
Transparency is the foundation of trust. Here is how we collect, validate, and publish RAM pricing data - and the standards we hold ourselves to.
Current Database Snapshot
Live statistics from the most recent daily refresh.
Total modules
4,485
In stock
4,411
Brands tracked
137+
With full specs
100%
DDR4 typical $/GB
$7.44/GB
DDR5 typical $/GB
$16.48/GB
Data Source
Product and pricing data comes from Amazon.com via the Amazon Creators API. Our daily pipeline refreshes listings each morning across DDR3, DDR4, DDR5, laptop, desktop, gaming, and server segments. Figures shown are as of the last refresh and may differ at checkout on Amazon.com. This data is displayed on this site only — it is not a public Amazon data feed.
How We Score & Rank Products
Price Per GB
The total kit price divided by total capacity in gigabytes. This is the most objective value metric - it lets you compare a $60 32GB kit against a $40 16GB kit on equal terms. We always use total kit capacity, not per-stick capacity.
Deal Score
A composite 0-100 value score combining price-per-GB relative to the relevant cohort, customer rating, and review volume. Inventory confidence is deliberately kept separate.
Inventory Confidence
A separate 0-100 score for verified stock evidence, search freshness, specification confidence, valid price, image, and review signals. Reliable inventory is preferred before lowest $/GB.
Buy Signal
Compares today's median $/GB only with methodology v2 snapshots in the clean-consumer-median-v2 cohort (40 snapshots). Legacy mixed cohorts are not blended into the signal.
Quality Standards
Price validation
Prices outside realistic ranges for RAM are flagged and excluded from statistics. This prevents outliers from distorting averages.
Specification normalization
Memory type, form factor, and ECC status are normalized to canonical values. Brand names are standardized across different listing formats.
RAM-only filter
Products are filtered to exclude SSDs, flash drives, graphics cards, and other non-RAM items that occasionally appear in memory search results.
Availability verification
Products that consistently disappear from search results are verified via direct lookup before removal. Network errors do not trigger removal - only confirmed unavailability does.
Cohort versioning
Every new market snapshot records its methodology version and cohort ID. Trend deltas, volatility, and buy signals compare only like-for-like versions.
Deduplication
Duplicate product listings are identified and removed. Each unique product is tracked with its own price history.
Spec completeness
Products with missing critical specifications are shown in listings but excluded from aggregate statistics to keep category averages accurate.
Known Limitations
- Prices reflect Amazon list prices and do not include limited-time coupons, Lightning Deals, or promotional discounts active at time of purchase.
- Specifications are extracted from product listing text and may occasionally contain errors from the original seller.
- We currently track Amazon.com (US) only. Prices in other regions or from other retailers will differ.
- The current cohort starts a fresh like-for-like history after methodology changes. Signals stay unavailable or limited until enough same-version snapshots exist.
- Availability is checked daily but can change between refreshes. Always verify stock on Amazon before purchasing.
Methodology, then buy
Rankings use the rules above. These are live catalog value picks — not sponsored slots.
DDR5 · 64GB
G.SKILL Ripjaws S5 Series 64GB (2 x 32GB) 288-Pin PC RAM DDR5 6000 (PC5 48000) Desktop Memory Model F5-6000J3040G32GX2-RS5K
$114.95 · $1.80/GB
DDR4 · 128GB
Corsair Vengeance LPX 128GB (4x32GB) DDR4 3600 (PC4-28800) C18 1.35V Desktop Memory - Black
$194.99 · $1.52/GB
DDR3 · 16GB
Dolgix MACMEMORY 16GB Kit (2X8GB) PC3-10600 1333MHz SODIMM 204-Pin Laptop Memory for Apple Models
$30.00 · $1.88/GB
Related Pages
Methodology FAQ
How often are prices updated?
Prices are refreshed daily via our automated pipeline. The entire process - price refresh, availability verification, catalog maintenance, and market snapshot - completes every morning before US buyers wake up.
What is a deal score?
The deal score (0-100) combines price-per-GB relative to the relevant cohort, customer rating, and review count. Inventory confidence is scored separately so a cheap but weak listing does not outrank a reliable buyable kit.
How do you determine if a product is in stock?
A product is marked "In Stock" when it appears in Amazon search results with delivery information in our latest daily refresh. Products that consistently disappear from search results are verified via direct lookup before being removed from our database.
Why do some products have missing specifications?
Specifications are extracted from Amazon product listings. Some listings have incomplete or non-standard formatting. Products with missing critical specs are still shown in listings but excluded from aggregate statistics to keep averages accurate.
What is the 52-week buy signal?
The buy signal compares today's median $/GB with same-methodology daily snapshots. We never compare a corrected consumer cohort against legacy mixed inventory; signals remain unavailable until the current cohort has enough history.
Do you accept sponsored placements or paid rankings?
No. Every ranking on this site is computed from price and specification data alone. We do not accept sponsored placements, paid rankings, or manufacturer relationships that could influence our content. Our only revenue is Amazon affiliate commissions on purchases made through our links.