Technology
EPS is a custom manufacturer. We do not sell from stock — we build interconnects to a specification you define, and the pages below exist so that the specification is right before anything is quoted.
Each page covers one connector family or platform: what the standard actually defines, what it does not define, the compatibility traps that cause returns, and what we need from you in order to build it. Where a number has no published source, we publish a dash rather than a guess.
Which connector standards and platforms does EPS cover?
SlimSAS (SFF-8654) Cable Assemblies
SlimSAS 4i and 8i assemblies built to your specification — SAS and PCIe paths, Y cables, custom lengths and orientations.
SFF Connector Reference — SFF-8639, 8643, 8644, 8654
Which SFF connector is which, what each carries, and why physical fit never proves protocol.
SAS, Mini-SAS and Mini-SAS HD Assemblies
Custom SAS, Mini-SAS and Mini-SAS HD assemblies built to specification.
MCIO cable assemblies built to your specification — 38, 74, 124 and 148-contact, with or without sidebands, Y cables.
OCuLink 4i and 8i assemblies built to your specification — PCIe paths, OCuLink to U.2 and SlimSAS, custom lengths and orientations.
U.2 (SFF-8639) and U.3 NVMe drive cabling built to your specification — host-to-drive paths, power leads, breakouts.
M.2 and mSATA Adapters and Keying
M.2 and mSATA are not the same thing, and keying is not compatibility.
PCIe Risers, Extensions and Relocation
PCIe riser, extension and relocation assemblies built to your specification — x1 through x16, GPU relocation, custom lengths.
Custom NUC lids, internal 2.5-inch SATA cabling and front-panel brackets built to your specification.
SATA, eSATA, Power and Y Cable Assemblies
SATA data and power, slimline, peripheral conversions and Y splits — built to your connector, length and orientation.
QSFP and SFP Direct Attach Copper Cabling
SFP+, SFP28, QSFP+ and QSFP28 direct attach assemblies, straight or split to four single-lane ends.
IDE, SCSI, IDC ribbon, ZIF/LIF and FireWire assemblies for equipment still in service. Low volumes are normal.
PCIe Add-In Cards, Retimers and Redrivers
Host-side cards presenting MCIO, SlimSAS, OCuLink and U.2 — passive or signal-conditioned, to your bracket and outline.
Cable Construction: Gauge, Shielding and Length
How AWG, shielding, impedance control and routed length interact — the inputs behind every assembly on this site.
Drive Enclosures, Carriers and Hot-Swap Backplanes
Removable carriers, bay hardware and backplane interconnect, with the enclosure and the cabling built in one place.
Looking for a stocked part rather than a custom build? Our specialty storefronts hold inventory: see available parts at MicroSATACables, and NUC accessories at GoRite.
How does a custom build run at EPS?
Three steps: engineering review, quote and approval, then manufacture and delivery. You specify length, conductor size and stranding, shielding, jacket material and termination; we confirm lead time with your quote against the actual specification and volume rather than quoting a standard interval. Volumes run from 10 units to 10,000-plus, every assembly QC tested, manufactured in Acton, Massachusetts.
For the manufacturing processes behind these assemblies — custom cable engineering, enclosures, molding and stampings — see Capabilities.
Not sure which connector your build needs?
Send us the endpoints and the protocol path and we will confirm the mechanical detail against the actual parts. Engineering review comes before the quote, not after it.