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A Principled Technologies report 2

Workstation heat, power usage, and sound: Lenovo

ThinkStation C30 vs. HP Z620 Workstation

WHICH WORKSTATION MAKES FOR A RELIABLE, POWER-

EFFICIENT, AND PLEASANT WORK ENVIRONMENT?

A workstation that generates more heat and noise and uses more

power than necessary can be more prone to system failure, can be distracting

and uncomfortable for workers , and can boost electricity bills—both because of

the power the system itself draws and the power that additional air

conditioning uses. To determine how two workstations compared on these

fronts, we measured the heat, noise, and power consumption of the Lenovo

ThinkStation C30 and the HP Z620 Workstation.

We performed the tests while the two systems were idle and again

while they were running a heavy workload that consisted of two benchmarks

stressing each system’s hard disk, processor, and memory.

Figure 1 presents highlights of our test results.

Lenovo ThinkStation C30

HP Z620 Workstation

Comparison

Heat (degrees Celsius above room temperature)

Rear system fan

exhaust (idle)

3.9

4.5

15.4% cooler

Average of 5 internal

locations (idle)

9.4

11.5

22.3% cooler

Power usage (watts)

Idle

68.1

85.0

Uses 19.9% less power

Under load

128.7

149.1

Uses 13.7% less power

Figure 1: Test result summary. Lower numbers are better.

For detailed specifications of our test systems, see Appendix A. For

details of our testing, see Appendix B.

COOL UNDER PRESSURE

The operating temperatures of computers vary considerably. While one

advantage of a cooler workstation is obvious—no one wants a hot office—

workstations running at cooler temperatures also bring other benefits.

It is well known within the IT industry that operating temperatures

degrade hardware reliability. Excess heat can cause hard drives, CPUs, memory,

and other components to fail. For example, overheating can expand hard drive

platters, causing hard drive failure. At the very least, excess heat can reduce the

drive’s effective operating life. According to a recent Fujitsu white paper, hard

disk manufacturers now suggest cooler operating temperatures for drive

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