LG U+ and GS E&C, together with Xi C&A, Gansam Architects and D&O CM, disclosed an agreement to build a PMDC Alliance — prefabricated modular data centres, in which structure, power and cooling equipment are manufactured in a factory and assembled on site. The headline number attached to it is 100MW. It describes a drawing.
What the alliance actually produces
The deliverable is a standardised PMDC model. Two variants are in scope: a new-build model centred on a 100MW-class hyperscale facility, and a retrofit model for converting existing buildings into AI infrastructure. What the five companies have agreed to produce is a reference design and the construction method behind it — not a data centre, and not a commitment to build one.
Five firms, five drafting roles
The division of labour confirms it. LG U+ contributes operating standards, technical requirements and business direction from its own data-centre operations. GS E&C examines structure, construction method, build duration and cost. Xi C&A handles the retrofit model and power and cooling optimisation. Gansam Architects produces the standard design model. D&O CM supplies project and construction management. Every role is a design or review function.
The dates, which the English coverage dropped
The memorandum was signed on 4 September at LG U+'s Pyeongchon Mega Center and disclosed on the 6th. The five firms have been developing the standard model since April. So the announcement marks neither the start of the work nor a new decision to spend — it formalises a collaboration five months old. Parts of the English-language coverage carried neither the signing date nor the qualifier on the capacity figure.
What the framing gets wrong
Read as "LG U+ and GS E&C to develop a 100MW AI data centre," this is a capacity story. It is not. There is no site, no named tenant, no schedule, no investment figure and no committed megawatt in the agreement. What it does signal is real, and worth separating from the number: Korean telcos are now racing on build lead time rather than on compute, and prefabrication is the lever — a second telco-and-builder modular pact in three days, after KT Cloud and LS Electric on 4 September. Whoever can phase capacity in as demand arrives wins on schedule, not on announced megawatts.