PCIe 5.0 ×16 Riser Cables

Precision at
31.25 Picoseconds

When a single bit lives for 31.25 trillionths of a second, every atom of copper, every micron of gold, every milliohm of impedance determines whether your GPU runs at full bandwidth — or negotiates down.

128 GB/s
PCIe 5.0 ×16 bandwidth
No lane fallback
85 Ω
Differential impedance
±3% matched
30 μ″
Gold contact plating
Hard gold
−20 °C
Industrial grade
To +105°C
⚡ Signal Path
The 31.25 ps Reality
At 32 GT/s, adjacent bits overlap — Intersymbol Interference. Without pair-level shielding, the receiver cannot distinguish 1 from 0. The GPU falls back to ×8, or fails to POST.
Nyquist Frequency16 GHz
Insertion Loss Target< 0.35 dB
Shielding ArchitecturePair foil + braid
Conductor SpecAg-plated Cu 29AWG
Engineering

Speed Is Easy.
Signal Integrity Is Hard.

PCIe 5.0 doubles Gen 4 throughput. Without deliberate engineering at the physical layer, that speed is theoretical — your GPU negotiates down before the OS loads.

Three Physics Problems

Intersymbol Interference. At 31.25 ps per bit, pulses overlap at the receiver. Per-pair aluminum foil shielding isolates every differential lane — no crosstalk, no symbol corruption.

Impedance Mismatch. A 5% deviation from the 85Ω target creates return loss that closes the eye diagram. Our 40-pin connectors are machined to ≤3% across all 164 contact points.

Antenna Effect. At 16 GHz Nyquist, the cable behaves as an antenna. PSU rails, VRM switching noise, and even RGB PWM inject EMI. The overall braided shield absorbs external interference before it reaches the signal path.

Full specifications →
32 GT/sTransfer rate per lane
31.25 psUnit interval
16 GHzNyquist frequency
85Ω ±3%Differential impedance
<0.35 dBInsertion loss @ 16 GHz
−35 dBReturn loss
2-LayerPer-pair foil + braid
164-pinGold-plated contacts
"

Most similar setups are limited by the PCIe bus version due to the challenges of running longer PCIe extensions.

— a16z, Building an Efficient GPU Server with NVIDIA RTX 4090s/5090s (2025)
Products

Calculated by Length.
Validated at 32 GT/s.

Signal integrity decays with distance. Five precision lengths, each verified to hold the Gen 5 eye diagram.

100
mm
Direct Link
Min loss · Adjacent slot
RECOMMENDED
150
mm
Server Standard
Balanced reach · 8-GPU rack
200
mm
Compact Build
ITX/SFF · Vertical mount
250
mm
Full Tower
ATX vertical · Extra routing
ENTERPRISE
300
mm
Max Reach
Re-timer active · Signal rebuild

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Specifications

The Difference Is in the Details

Every Horsebiz cable ships with a factory eye-diagram report. Here is what separates the physical layer.

ParameterHorsebiz HBZ SeriesIndustry Typical
InterfaceGen 5.0 ×16 · 128 GB/s bidirectionalGen 4.0 ×16 or 5.0 ×8 fallback
ConductorSilver-plated copper · 29 AWGBare copper · 30–32 AWG
ShieldingPair-level foil + overall copper braidOverall braid (no pair isolation)
Contact PlatingHard gold · ≥30 micro-inchesFlash gold · ~15 micro-inches
Impedance85 Ω ± 3%85 Ω ± 10% (estimated)
Insertion Loss @16GHz< 0.35 dB0.5–1.2 dB
Signal ConditioningRe-timer (300mm) · full rebuildPassive only; Redriver at best
Temperature−20°C to +105°C (industrial)0°C to +80°C (commercial)
ValidationPCI-SIG Gen 5 compliance · Eye-diagram per unitSelf-declared; no test data
Solutions

One Cable. Three Deployment Classes.

From AI clusters to mining farms, the requirement is the same: signal integrity at full Gen 5 bandwidth, under sustained load.

🏢

AI Compute Infrastructure

Eight GPUs, sixteen lanes each. Deploy H200 NVL inference clusters or RTX 5090 research servers — every GPU at full Gen 5 bandwidth, independently verified.

8×
Max GPU density
128 GB/s
Per slot throughput
⚡

Continuous Mining

Solid capacitors. Hard gold contacts. Anti-burn circuitry. USB 3.0 data channels maintain signal across 6–12 GPU parallel configurations — rated for 24/7 continuous duty.

12×
GPU parallel
24/7
Rated duty cycle
🖥️

Professional Workstations

RTX 5090-class GPUs. Vertical mounts. Zero lane reduction. Multilayer EMI shielding isolates the signal from PSU, VRM, and peripheral noise sources.

0
Lane fallback events
±3%
Impedance precision

Informed by 11 independent data sources

ServeTheHomea16zWikipedia PCIeTech-ChampionThewearifyEasyPCModElectronics DigestPC Parts GeekRequirementsPCPCTechkitsEveZone

Engineered for 32 GT/s

Every cable ships with its factory eye-diagram report.

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