Desktop Hard Drives — 3.5" IDE, ATA & SATA

Every desktop drive interface from ATA-66 through modern SATA 6Gb/s

About Desktop Hard Drives

Desktop hard drive shopping splits into two very different needs: a modern SATA drive for everyday storage, or an exact-generation replacement for an older machine that cannot simply take "whatever is available." We stock both ends — 3.5-inch desktop drives spanning IDE/ATA-66/100/133 through SATA 1.5Gb/s, 3Gb/s and 6Gb/s, in capacities from legacy 6–80GB drives up to modern multi-terabyte SATA units, pulled largely from decommissioned Dell, HP, and Gateway desktops plus standalone Seagate, WD, and Fujitsu mechanisms.

What's in Stock

IDE / ATA (Ultra ATA-66/100/133) — for pre-2007 desktops that predate SATA entirely; capacities typically 6GB–250GB
SATA 1.5Gb/s & 3Gb/s — the SATA I/II generation used through the mid-2010s, still the correct match for that era's Dell OptiPlex and HP Compaq towers
SATA 6Gb/s — current-generation interface for any modern desktop build or upgrade
7200 & 5400 RPM — both spindle speeds stocked; RPM affects rebuild/copy time more than day-to-day desktop use

Drive interface and connector are not interchangeable across generations — an IDE drive will not plug into a SATA-only board, and vice versa. Send us the Dell/HP model or the part number off the drive you're replacing and we'll confirm the exact interface and capacity before you order.

Featured Desktop Hard Drives Products

Browse all 96,465 Desktop Hard Drives SKUs.

Desktop Hard Drives in stock, by capacity

Live count of desktop hard drives that are priced, photographed and ready to ship, taken from our own catalogue on 16 September 2026. Prices are what you pay, not a list price.

Capacity	Drives available	Price range	Average
20GB	673	$39.09 – $609.62	$169.90
40GB	1,123	$39.25 – $638.06	$151.47
80GB	2,328	$44.56 – $765.36	$156.38
120GB	931	$52.80 – $580.78	$171.04
160GB	2,211	$46.25 – $997.97	$165.72
250GB	2,152	$36.00 – $1,720.78	$185.41
320GB	808	$51.12 – $680.46	$180.79
500GB	2,432	$38.40 – $4,784.42	$210.58
750GB	921	$52.00 – $4,631.47	$254.02
1TB	2,448	$41.60 – $4,107.43	$256.72
2TB	1,500	$46.40 – $6,123.21	$312.35
3TB	827	$76.00 – $5,612.11	$393.99

Need several of one capacity? Paste the part numbers into the quick order pad, or ask for a bulk quote.

Frequently Asked Questions

Can I put a SATA drive in an old IDE-only desktop?

Not directly — the connectors and signaling are physically and electrically different. Some IDE-to-SATA bridge adapters exist, but the safest and most reliable fix for a legacy desktop is a matching IDE replacement drive, which is why we keep ATA-66/100/133 stock rather than relying on adapters.

What is the difference between SATA 1.5Gb/s, 3Gb/s and 6Gb/s?

These are successive SATA revisions (SATA I, II, III) with rising maximum interface bandwidth. They are backward compatible — a 3Gb/s drive works in a 1.5Gb/s port at the lower speed — so for an older desktop board, matching or exceeding the board's native SATA generation is safe. The bottleneck on a mechanical hard drive is usually the platters, not the interface, so the practical speed difference is small.

Do you test these drives before shipping?

Yes — every desktop hard drive is surface-tested and SMART-checked before it ships. These are working pulls and tested surplus, not as-is/untested drives.