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GS21 3400

GS21 3400 The large-scale mainframe system “GS21 3400 Model group” adopts with our new in-house developed eight core processor, on a single-chip.
GS21 3400 model group also has enhanced Green ICT credentials plus outstanding performance and reliability.


GlobalServer "GS21 3400 model group" provides the power to consolidate your business, information, and optimize your IT infrastructure.

With the current challenging business environment, many companies are looking to cut deployment and operating costs by consolidating servers and storage into datacenters. They are also showing increased interest in intra-corporate cloud computing and other IT infrastructure optimization strategies that link multiple systems seamlessly and efficiently using SOA.

In addition, such companies are also being viewed by the public, not only for the products and services they provide, but also on their business continuity, stability, legal compliance, and environmental actions.
In this climate, and as a result of the mainframe server’s crucial role in centralized data processing, its importance is being re-acknowledged. GlobalServer, with its enhanced performance and reliability, coupled with green IT credentials is able to contribute to customer business growth and improved customer value.

Improved processing performance

  • Higher performance, higher reliability
    GS21 3400 model group adopts a system-on-chip design to boost transaction-processing performance, while also increasing reliability. Each chipset hosts up to 8 cores, equipped with a 256 KB primary cache, as well as a secondary cache of up to 20 MB, an I/O processor, a memory controller, and a system controller.
  • Expanded scalability
    When configuring large-scale virtual machines (VM) with around 20,000 virtual I/O devices as a development environment, previous models were limited to configurations of three VM per cluster. However, GS21 3400 models offer both hardware and software enhancements that enable a dramatically larger number of virtual I/O configurations of over 10 VM. This allows concurrent development, revision and testing for different applications regardless of scale.

Green ICT approach

  • Lower power consumption
    GS21 3400 model group use system-on-chip technology to consolidate into a single chipset. Furthermore, features such as a compact, high-performance power unit reduce power consumption by as much as 50% over previous models, with the same processing performance.


Model 10J, 10K, 10L, 10M, 10N, 10P, 10Q, 10R, 10S, 10, 20R, 20S, 20, 30, 40
No. of CPU 1 to 4
Main Memory Max. 64GB
Channels Max. 96
Supported Channel Types FCLINK, CTS, PSD, ONA4
Dual Power Options (Cluster)
Dimensions (W x D x H)Note1 700 × 1,110 × 2,000 (mm)
Power Requirement (KVA)Note1 2.4
Weight (kg)Note1 380

Note1:Standard configuration is shown