MSI is gearing up for a big comeback in the extreme overclocking graphics card scene, and an early look at its upcoming GeForce RTX 5090 Lightning Z OCER suggests it’s not holding back. Ahead of its expected showcase at CES 2026, the graphics card has reportedly been pictured and even pushed through an initial overclocking test, giving enthusiasts an early taste of what this heavyweight GPU could deliver.
The leaked images focus on what overclockers care about most: the PCB. This appears to be a GeForce RTX 5090 Lightning Z model carrying the “OCER” label, a designation that strongly hints at a purpose-built variant aimed at hardcore overclocking rather than everyday gaming builds.
From the board layout alone, it’s clear MSI is designing this card for serious power delivery and thermal control. The PCB reportedly features an imposing VRM configuration, with 40 VRMs plus four additional phases positioned near the power connectors. Power input is handled through dual 16-pin connectors, signaling that this flagship is built to feed the RTX 5090’s GB202 GPU with the kind of headroom competitive overclockers demand.
There are other details that stand out, too. The board shows several small copper heatsinks placed around key components, which look more like custom additions than cosmetic touches. At the center sits the massive GB202 GPU package, and surrounding it are 16 GDDR7 memory modules in their expected positions—an arrangement consistent with a high-end, fully loaded RTX 5090-class design. The rear of the PCB also appears to include additional ports, further underlining that this isn’t a typical reference-style layout.
Even more interesting than the photos are the first performance claims under liquid nitrogen (LN2). In early testing, the GPU reportedly reached a peak core clock of 3457 MHz, while the GDDR7 memory was pushed to an eye-catching 36 Gbps. For anyone following next-generation NVIDIA flagship overclocking, those numbers are an attention-grabber—especially this early, before the card is widely available and fine-tuned by more extreme OC specialists.
This first glimpse is likely only the beginning. Once more overclockers get their hands on the MSI GeForce RTX 5090 Lightning Z OCER, expect higher clocks, better tuning, and potentially record-setting benchmark runs that show just how far the Blackwell-based RTX 5090 platform can be pushed when paired with MSI’s most aggressive Lightning-class hardware.
