---
title: "Cluster specifications (legacy reference)"
description: "Historical hardware tables for CARC clusters, including retired systems such as Wheeler, Taos, Gibbs, and Xena."
type: Reference
tags:
- Systems
- Hardware
- Legacy
status: deprecated
generated:
by: "claude/fable-5"
at: "2026-08-29T00:00:00Z"
sources:
- id: webinfo
resource: "https://github.com/UNM-CARC/webinfo/blob/master/systems_information.md"
title: "UNM-CARC webinfo: systems_information.md"
author: "team:unm-carc"
last_modified: "2023-01-23T10:24:36-07:00"
---
# Cluster specifications (legacy reference)
!!! warning "Legacy content"
This page is kept for history and links. Wheeler, Taos, Gibbs, and Xena have been retired — see the [Systems overview](overview.md) for current clusters.
## CARC Supercomputer and Cluster Resources
| **Machine Name** | **Wheeler** | **Taos** | **Gibbs** | **Xena** | **Hopper** |
| :---: | :---: | :---: | :---: | :---: | :---: |
| **Model/Type** | SGI AltixXE
Xeon X5550
2.67 GHz | Dell PowerEdge R630
Xeon E5-2698 V4
2.20 GHz | Dell PowerEdge R620
Intel Xeon E5-2670
2.6 GHz | Dell PowerEdge R730
Intel Xeon E5-2640
2.6 GHz
and
PowerEdge R930
Intel Xeon E7-4809
2.0 Ghz | Dell PowerEdge R640
Intel Xeon Gold 6226R
2.9 GHz
and
Dell PowerEdge R740
Intel Xeon Gold 6242
2.8 GHz |
| **Linux Operating
System** | CentOS 7 | CentOS 7 | Scientific Linux | CentOS 7 | Rocky Linux |
| **Interconnect** | Mellanox IS5600
InfiniScale IV
ConnectX-2 IB QDR
(MT26428) | Mellanox SX6000
ConnectX-3 IB FDR
(MT4099) | InfiniBand QDR | InfiniBand FDR | InfiniBand HDR |
| **Nodes** | 304 | 9 | 24 | 32 | 61 |
| **Cores/Node** | 8 | variable | 16 | 16, 32 | 32 |
| **Total Cores** | 2432 | 180 | 384 | 576 | 2176 |
| **RAM/Core** | 6GB | variable | 4 GB | 4 GB, 32 GB, 96 GB | variable |
| **Local disk/node** | Diskless | 1 TB | 1 TB | 1 TB | 448 GB |
| **Peak FLOPS
(theoretical),
in TFLOPS** | 25 | (TBD) | 3.996 | 18 | (TBD) |
| **Processor Architecture** | Intel Xeon
Nehalem EP | Intel Xeon
Broadwell | Intel SandyBridge | Intel Xeon E7-2640
Intel Xeon E7-4809
(Haswell) | Intel Xeon Gold 6226R
Intel Xeon Gold 6242
(Cascade Lake) |
| **Local Scratch Space
(TB)** | 40 | 27 | 6.3 | 73 | (TBD) |
### Xena Cluster Specs
| **Queue Name** | bigmem-1TB | bigmem-3TB | dualGPU | singleGPU |
| :---: | :---: | :---: | :---: | :---: |
| **Nodes** | 2 | 2 | 4 | 24 |
|**Cores/Node** | 32 | 32 | 16 | 16 |
|**Memory/Node** | 1 TB | 3 TB| 64 GB | 64 GB |
| **Total Cores** | 64 | 64 | 64 | 384 |
| **Processor
Architecture** | Intel Xeon
CPU E7-4809 | Intel Xeon
CPU E7-4809 | Intel Xeon
CPU E5-2640 | Intel Xeon
CPU E5-2640 |
| **CPU GHz** | 2.00 | 2.00 | 2.60 | 2.60 |
| **GPU** | N/A | N/A | 2 x Nvidia Tesla
K40M per node | 1 x Nvidia Tesla
K40M per node |
### Historical queue limits
Queue limits in force when these systems were retired:
#### Xena
| Queue | GPU | Bigmem | Debug |
|---: |:---: |:---: |:---: |
| Number of Processors | 192 | 128 | 8 |
| Number of Nodes | 12 (singleGPU)
4 (dualGPU) | 1 | 2 |
| Processors per Node | 16 | 32 | 4 |
| Walltime(H:M:S) | 48:00:00 | 48:00:00 | 04:00:00 |
| Memory Limit | 60 Gb (singleGPU and dualGPU) | 1 Tb (bigmem-1TB)
3 Tb (bigmem-3TB)| 60 Gb |
#### Wheeler
| Queue: | Default | Debug |
|----------------------:|:----------:|:----------:|
| Number of Processors | 400 | 32 |
| Number of Nodes | 50 | 4 |
| Processors per Node | 8 | 8 |
| Walltime(H:M:S) | 48:00:00 | 04:00:00 |
| Memory Limit | 44 Gb | 44 Gb |
Migrated from [UNM-CARC QuickBytes](https://github.com/UNM-CARC/webinfo/blob/master/systems_information.md){target=_blank} (last source update 2023-01-23). Spotted a problem? [Open an issue or pull request](https://github.com/UNM-CARC/QuickBytes){target=_blank}.