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Home AI ASRock Rack 4U16X-GNR2 NVIDIA HGX B300 8-GPU Server Review

ASRock Rack 4U16X-GNR2 NVIDIA HGX B300 8-GPU Server Review

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ASRock Rack 4U16X-GNR2 Topology

As you might imagine, with GPUs, CPUs, and NICs, there is plenty here for a robust topology diagram.

ASRock Rack 8x NVIDIA Blackwell Ultra Topology
ASRock Rack 8x NVIDIA Blackwell Ultra Topology

We also found a motherboard block diagram which may help explain how the various parts are connected.

ASRock Rack GNR2D32G 2L Block Diagram
ASRock Rack GNR2D32G 2L Block Diagram

Of course, the stars of the system are its GPUs. Here we can see the NVIDIA Blackwell Ultra GPUs each with a 1.1kW power cap.

NVIDIA Blackwell Ultra Nvidia Smi
NVIDIA Blackwell Ultra Nvidia Smi

Next, let us move on to management.

ASRock Rack 4U16X-GNR2 Management

ASRock Rack appears to be using a standard SP-X management interface. Here is the IPMI dashboard.

ASRock Rack 4U16X GNR2 IPMI Dashboard
ASRock Rack 4U16X GNR2 IPMI Dashboard

This is an industry-standard management interface that we have covered many times. Still, given the sheer volume of components in the system, even some features like being able to inventory system components is quite useful.

ASRock Rack 4U16X GNR2 IPMI Kioxia SSDs
ASRock Rack 4U16X GNR2 IPMI Kioxia SSDs

Since many people like to see their memory, here is the DDR5 inventory.

ASRock Rack 4U16X GNR2 IPMI Memory
ASRock Rack 4U16X GNR2 IPMI Memory

There are also various power sensors and a display for overall power consumption.

ASRock Rack 4U16X GNR2 IPMI Power
ASRock Rack 4U16X GNR2 IPMI Power

You can also perform power operations. One great feature ASRock Rack has, but not all vendors do, is the ability to select a boot target at next boot.

ASRock Rack 4U16X GNR2 Power Control
ASRock Rack 4U16X GNR2 Power Control

There is an HTML5 iKVM feature for remote console access. That includes the ability to remotely mount media. This is a simple capability some vendors actually charge for.

ASRock Rack 4U16X GNR2 IPMI HTML5 IKVM
ASRock Rack 4U16X GNR2 IPMI HTML5 IKVM

There is, of course, a lot here, but hopefully this gives you a flavor of the management interface.

ASRock Rack 4U16X GNR2 IPMI Maint
ASRock Rack 4U16X GNR2 IPMI Maint

Next, let us get to the performance.

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