【2026年10月第4週】自作PC向け メモリ価格推移調査 | Corsair DDR5 5200 16GBが29.86%値下がり／5600 64GBは−29,800円 全51製品

Summary

The video tracks prices for 51 DDR4 and DDR5 memory products as of October 20. Compared with the previous week, 6 products fell in price, 4 rose, and 41 were unchanged. Most price reductions came from Corsair and other models discounted at PC shops, while increases were associated with Dospara and Tsukumo.

Biggest Price Changes

• Largest percentage drop: Corsair DDR5-5200, 16GB (2×8GB), fell ¥15,701, from ¥52,580 to ¥36,879—a 29.86% decrease.
• Largest yen drop: Corsair DDR5-5600, 64GB (2×32GB), fell ¥29,800, from ¥159,780 to ¥129,980—an 18.65% decrease.
• G.Skill DDR5-5600, 32GB (2×16GB): Fell ¥26,620 to ¥70,180, a 27.5% decrease.
• Corsair DDR5-6000, 32GB: Two models fell to ¥72,979 each.
• G.Skill DDR4-3200, 32GB: Fell about ¥11,941 to ¥34,320.

Price Trends by Capacity and Speed

• 16GB: The average price for DDR5-5200 dropped 15.33% to ¥43,354. DDR5-4800 averaged ¥35,580, while DDR4-3200 averaged ¥16,820.
• 32GB: DDR5-4800 and DDR5-5600 averages were nearly level at ¥71,373 and ¥71,508, respectively. This narrows the price-based case for choosing 4800 over 5600.
• 64GB: Prices remain a substantial expense. The recent Corsair 5600 reduction stands out, while a Lexar DDR5-6000 64GB model was listed at ¥110,990 as a relatively low-priced option.

Other Notable Movements

• An ADATA DDR5-4800 32GB product rose ¥5,000 to ¥65,980, contributing to the increase in the category average.
• An ADATA DDR5-5600 16GB product rose ¥4,000 to ¥36,980; the other products in that category were unchanged.
• DDR4-3200 16GB prices were stable, with a lowest listed price of ¥15,980.

Buying Guidance

This is a weekly price-tracking guide, not a performance review or benchmark test. Its main takeaway is to compare current prices across similar capacities and speeds: prices can differ substantially even between models from the same brand. The video also points viewers to a comparison site where they can check store prices, price history, and similar model numbers.

Main speaker/source: A single narrator from the 損しないPC選び – KIMERUCA / キメルカ channel. Price changes are attributed primarily to retailer listings, including PC shops, Dospara, and Tsukumo.