DisplayPort Cable: cable choice decides whether your 8K monitor locks a clean 60Hz signal or drops to 4K when the GPU starts pushing frames. Read on for the short version, then the detail for SA tech buyers. Setup pitfalls and Rand-budget notes are included.
You need a DisplayPort 2.1 cable certified to UHBR20 (Ultra High Bit Rate 20, or 80 Gbps). This is the only passive cable specification that delivers uncompressed 8K at 60Hz. Cables labelled only as 8K-compatible or DisplayPort without a version number are almost certainly DP 1.4 using Display Stream Compression and cannot carry uncompressed 8K/60Hz.
DisplayPort 2.1 introduced three bandwidth tiers: UHBR10 at 40 Gbps, UHBR13.5 at 54 Gbps, and UHBR20 at 80 Gbps. Uncompressed 8K at 60Hz with 8-bit colour requires approximately 48 Gbps. With HDR (10-bit colour at 60Hz), the requirement rises to around 60 Gbps. UHBR20 at 80 Gbps comfortably covers both scenarios with headroom. UHBR10 and UHBR13.5 cannot deliver 8K/60Hz in full HDR without DSC. Buy a cable explicitly labelled UHBR20 or DP 2.1 80G. If the product listing only says DP 2.1 without the UHBR tier, verify the bandwidth rating with the retailer before purchasing. Locally stocked UHBR20 certified cables in the 2m passive range cost from around R500 to R750.
The cable alone does not determine 8K/60Hz output. Your GPU must have a native DP 2.1 output port. Currently that means RTX 5080, RTX 5090, RX 9070 XT, RX 9070, or newer cards from either manufacturer. Your monitor must have a DP 2.1 input rated to accept 8K/60Hz. The monitor's specification sheet should list the maximum resolution on the DP port. All three components (GPU, cable, and monitor) must support DP 2.1 UHBR20 for the combination to output uncompressed 8K/60Hz. If any single component is DP 1.4, the system falls back to DP 1.4 bandwidth for the full connection.
VESA certifies passive DP 2.1 UHBR20 cables to 2m. This means a passive cable beyond 2m is not guaranteed to maintain UHBR20 bandwidth continuously. For desktop setups where the tower is within 2m of cable path from the monitor, a standard 2m passive cable is the correct choice. For longer runs, an active DP 2.1 cable embeds signal amplification circuitry inside the connector housing and maintains full bandwidth to 5m or more. Active DP 2.1 cables cost significantly more, from around R800 to R1,400 for quality options, but are the only reliable solution for long cable paths in larger rooms or standing desk configurations with under-floor routing.
Not all DP 2.1 cables are UHBR20. Some early DP 2.1 cables are certified to UHBR10 only (40 Gbps), which is insufficient for full 8K 60Hz HDR output. Always confirm the UHBR tier in the product specification, not just the DP version number, before purchasing for an 8K setup.
HDMI 2.1 at 48 Gbps uses Display Stream Compression for 8K/60Hz. If your monitor's primary 8K input is HDMI 2.1, use a certified 48G HDMI cable. For uncompressed 8K/60Hz, DP 2.1 UHBR20 is the appropriate standard. Most 8K monitors support both.
Look for DP 2.1, UHBR20, or 80 Gbps bandwidth. Some brands print all three. One confirmation is sufficient. Avoid cables that state only 8K-ready without a DP version or bandwidth figure.
Yes. Evetech and other SA retailers stock certified DP 2.1 cables. Buying locally avoids import duty uncertainty, ensures local warranty, and means the cable specification matches international certification standards without customs documentation concerns.
Ready to connect your 8K display with the correct cable? Evetech stocks certified DP 2.1 cables and 8K-capable monitors to complete your high-resolution build. Find what you need at Evetech.
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