Description
TL;DR: The N-ST4090TQ-X-V4 is the V4 Continuous Usage full-cover GPU water block for the ZOTAC RTX 4090 family and several PCB-equivalent partner cards. Verified fitments include the ZOTAC Gaming GeForce RTX 4090, RTX 4090 Trinity, Trinity OC, AMP Extreme AIRO, ZOTAC RTX 4090D and RTX 4090D Trinity, plus...
The N-ST4090TQ-X-V4 is the V4 Continuous Usage full-cover GPU water block for the ZOTAC RTX 4090 family and several PCB-equivalent partner cards. Verified fitments include the ZOTAC Gaming GeForce RTX 4090, RTX 4090 Trinity, Trinity OC, AMP Extreme AIRO, ZOTAC RTX 4090D and RTX 4090D Trinity, plus reference-PCB Manli RTX 4090 and the NVIDIA GeForce RTX 4090 Gallardo. The cold plate is nickel-electroplated high-purity copper, the top is PMMA acrylic for visible flow, and the backplate is black anodized aluminum that never contacts coolant. G1/4 inch ports support series or parallel multi-GPU loops, and the channel design covers GPU core, GDDR6X memory and VRM in one piece.
Q: Which ZOTAC RTX 4090 cards fit this block?
A: ZOTAC Gaming GeForce RTX 4090, RTX 4090 Trinity, RTX 4090 Trinity OC, RTX 4090 AMP Extreme AIRO, ZOTAC RTX 4090D and RTX 4090D Trinity, plus reference-PCB Manli RTX 4090 and the NVIDIA RTX 4090 Gallardo. Heavily redesigned non-reference variants may not fit.
Q: What materials are used?
A: Cold plate is nickel-electroplated high-purity copper, top is PMMA acrylic, and the backplate is black anodized aluminum that does not contact coolant.
Q: What is the difference vs older V2 / V3 blocks?
A: V4 is part of Bykski's Continuous Usage line, with material and seal refinements for sustained 24/7 use while retaining the same ZOTAC-family PCB footprint.
Q: Is the lighting 5V A-RGB or 12V RGB?
A: Lighting is 5V 3-pin addressable RGB (RBW). Mixing it with a 12V 4-pin RGB header will damage the LEDs.
Q: Does it support multi-GPU loops?
A: Yes. G1/4 inch ports and a high-flow channel design allow several blocks to be plumbed in series or parallel within a single loop.