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300W power supply prices

The lowest listed unit price is $0.20 per watt. The median is $0.62 per watt, across 2 ranked Newegg listings.

Checked on Oct 12, 2026. US dollars; tax and shipping excluded.

Typical unit prices

Checked on
300W power supply2 listed$0.62/wattUnchanged in 7 days, unchanged in 30 days

Typical = median of the listed products. Daily lines describe the recorded sample.

Compare 300W power supply prices

FiltersModel, maker and specifications

Showing the first 2 of 2 products.

Newegg links are affiliate links; a purchase may earn a commission. Affiliate status does not affect order.

Current unit prices · Updated Oct 12, 2026
Product and specificationsNewegg priceUnit pricePrice referenceCondition and availability
TOPOWER Flex ATX Series TOP-FLEX-300W 300 W 300W Power SupplyTOPOWER Flex ATX Series TOP-FLEX-300W 300 W 300W Power Supply300 WSpecifications from the Newegg listing$59.30View at Newegg (affiliate)Checked Oct 12, 2026$0.20 / wattLowest we have recorded since Aug 3, 2026Lowest price per watt of 2 like itNew · In stockWarranty: not recorded
SilverStone Technology 300W Fixed Cable TFX Power Supply 80 Plus Bronze TX300SilverStone Technology 300W Fixed Cable TFX Power Supply 80 Plus Bronze TX300300 W · 80 Plus BronzeSpecifications from the Newegg listing$313.06View at Newegg (affiliate)Checked Oct 12, 2026$1.04 / wattLowest we have recorded since Aug 3, 2026Lower price per watt than 0% of 2 like itNew · In stockWarranty: not recorded

How to read this list

Generation, speed, latency, socket, interface and form factor can be searched together. Listing-title specifications are labelled on each row; they do not establish fit. “New” means the listing is not labelled used or refurbished. A missing warranty is unknown. “Like it” compares a product with the others of the same wattage, condition on this page. “Lowest we have recorded” compares today's price with every daily price we have recorded for that exact product.

2 ranked products · Updated Oct 12, 2026

2 ranked products · Newegg US · Updated (19 hours ago).

Listings are on Newegg; the marketplace seller is not supplied. Prices exclude tax and shipping. Availability can change at checkout.

Download the complete category price list (CSV)

300W power supply over time

300W power supply · USD per watt · Updated Oct 12, 2026

$0.62per watt · Last observed Oct 12, 2026

Lowest recorded $0.62 on Aug 9, 2026 · Highest $0.62 on Aug 3, 2026

56 observed dates. Use the arrow keys on the chart to inspect a date.

300W power supply56 observed dates from Aug 3, 2026 to Oct 12, 2026. Range $0.62 to $0.62 per watt. Missing dates have no line. The table below contains every value.$0.62$0.62$0.62Low · Aug 9High · Aug 32026-08-032026-10-12300W power supply56 observed dates from Aug 3, 2026 to Oct 12, 2026. Range $0.62 to $0.62 per watt. Missing dates have no line. The table below contains every value.$0.62$0.62$0.62Low · Aug 9High · Aug 32026-08-032026-10-12
Daily prices and missing dates
300W power supply, updated Oct 12, 2026. Each value is the median of the products observed on that date.
DateUSD / wattProducts observed
Aug 3, 2026$0.622
Aug 4, 2026$0.622
Aug 5, 2026$0.622
Aug 6, 2026$0.622
Aug 7, 2026$0.622
Aug 8, 2026$0.622
Aug 9, 2026$0.622
Aug 10, 2026$0.622
Aug 11, 2026$0.622
Aug 12, 2026$0.622
Aug 13, 2026No observationNone
Aug 14, 2026No observationNone
Aug 15, 2026No observationNone
Aug 16, 2026No observationNone
Aug 17, 2026$0.622
Aug 18, 2026$0.622
Aug 19, 2026No observationNone
Aug 20, 2026$0.622
Aug 21, 2026$0.622
Aug 22, 2026$0.622
Aug 23, 2026$0.622
Aug 24, 2026$0.622
Aug 25, 2026$0.622
Aug 26, 2026$0.622
Aug 27, 2026No observationNone
Aug 28, 2026No observationNone
Aug 29, 2026No observationNone
Aug 30, 2026No observationNone
Aug 31, 2026No observationNone
Sep 1, 2026$0.622
Sep 2, 2026No observationNone
Sep 3, 2026$0.622
Sep 4, 2026$0.622
Sep 5, 2026$0.622
Sep 6, 2026$0.622
Sep 7, 2026$0.622
Sep 8, 2026$0.622
Sep 9, 2026$0.622
Sep 10, 2026$0.622
Sep 11, 2026$0.622
Sep 12, 2026$0.622
Sep 13, 2026$0.622
Sep 14, 2026$0.622
Sep 15, 2026$0.622
Sep 16, 2026$0.622
Sep 17, 2026$0.622
Sep 18, 2026$0.622
Sep 19, 2026$0.622
Sep 20, 2026$0.622
Sep 21, 2026$0.622
Sep 22, 2026$0.622
Sep 23, 2026No observationNone
Sep 24, 2026$0.622
Sep 25, 2026$0.622
Sep 26, 2026$0.622
Sep 27, 2026$0.622
Sep 28, 2026$0.622
Sep 29, 2026$0.622
Sep 30, 2026No observationNone
Oct 1, 2026No observationNone
Oct 2, 2026No observationNone
Oct 3, 2026$0.622
Oct 4, 2026$0.622
Oct 5, 2026$0.622
Oct 6, 2026$0.622
Oct 7, 2026$0.622
Oct 8, 2026$0.622
Oct 9, 2026$0.622
Oct 10, 2026$0.622
Oct 11, 2026$0.622
Oct 12, 2026$0.622
2026-08-03: collected2026-08-04: collected2026-08-05: collected2026-08-06: collected2026-08-07: collected2026-08-08: collected2026-08-09: collected2026-08-10: collected2026-08-11: collected2026-08-12: collected2026-08-13: no observation2026-08-14: no observation2026-08-15: no observation2026-08-16: no observation2026-08-17: collected2026-08-18: collected2026-08-19: no observation2026-08-20: collected2026-08-21: collected2026-08-22: collected2026-08-23: collected2026-08-24: collected2026-08-25: collected2026-08-26: collected2026-08-27: no observation2026-08-28: no observation2026-08-29: no observation2026-08-30: no observation2026-08-31: no observation2026-09-01: collected2026-09-02: no observation2026-09-03: collected2026-09-04: collected2026-09-05: collected2026-09-06: collected2026-09-07: collected2026-09-08: collected2026-09-09: collected2026-09-10: collected2026-09-11: collected2026-09-12: collected2026-09-13: collected2026-09-14: collected2026-09-15: collected2026-09-16: collected2026-09-17: collected2026-09-18: collected2026-09-19: collected2026-09-20: collected2026-09-21: collected2026-09-22: collected2026-09-23: no observation2026-09-24: collected2026-09-25: collected2026-09-26: collected2026-09-27: collected2026-09-28: collected2026-09-29: collected2026-09-30: no observation2026-10-01: no observation2026-10-02: no observation2026-10-03: collected2026-10-04: collected2026-10-05: collected2026-10-06: collected2026-10-07: collected2026-10-08: collected2026-10-09: collected2026-10-10: collected2026-10-11: collected2026-10-12: collected
56 collection days · 15 missed · Aug 3, 2026 to Oct 12, 2026

Daily medians use identifiable products in this list; product availability and mix can change. Missing collection dates remain gaps.

Compare the supply, not just the wattage

A lower price per watt does not measure power quality. Check the manufacturer's stated form factor, ATX specification, GPU connectors and warranty against your build.

Manufacturer-matched supplies in this tier
Model80 PLUS ratingATX specificationWarranty

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