Hardware

This graphic shows where our power goes.

As we can see from this pie graphic, the biggest part of energy wastes on display. The second place goes to memory controller hub, power supply and CPU.  Another leaders of power usage are hard drive, graphic card and miscellaneous. Also 5 percents used by clock. 

 

Lab 14 computer characteristics

Number of computers	25
Type of computers	Desktop pc
Unit	HP dx 5150 MT Base Unit
Monitor	HP L1506, 15 inch TFT LCD, 50-60 Hz frequency, typical power consumption 21W, max power consumption 23 W.
Processor	AMD Athlon 64 X2 dual core 3800+, 1,99 GHz, Thermal Design Power 89 W
Video card	ATI Radeon xpress 200 series
Hard drive	80 GB, SATA driver
RAM	1 Gb, (958 Mb usable)
Power supply	200 Watts.

 

Changes:

• Our group decided to change, first of all, the processor. We choose Intel® Core™ i3-530 Processor, 2.93 GHz, 2 cores, 73W, with Intel SpeedStep technology . This model has higher frequency, which means better performance and speed, but at the same time requires 73 W instead of 89 W of old AMD processor. ( 16 W difference)

• 1 Gb of RAM in not enough for a good performance, so we change it to 2 Gb. The original motherboard has DDR I type memory slot, so it is impossible to use DDR III memory kit, which is greener. Anyway there is no point to chance a motherboard so we suggest PNY OPTIMA 2GB (2x1GB) Dual Channel Kit DDR 400 MHz. We need only 13 completes of this memory for upgrading 25 PCs, because an old memory can be combined.

• We already changed two most important parts and improve overall speed and performance. Now we need a new power supply, because old one in not powerful enough. We suggest Antec EA-380D Power Supply, 380Watt Bronze Certified ATX12V v2.3 power supply, with Dual 12V output circuits. Help save the environment with this EarthWatts Green PSU. The Antec EarthWatts EA-380D Green PC Power Supply meets the Bronze level of efficiency from 80 PLUS, the most widely recognized independent standard in power-supply efficiency. It means that the EA-380D is at least 80-percent (or greater) energy efficient, meaning you will save energy while reducing heat output and fan noise. [3]. 

What we didn’t change:

• Monitor with HP L1506, 15 inch TFT LCD, 50-60 Hz frequency, typical power consumption 21W, is satisfies work and green technology needs.
• Mouse and keyboard are standard and wired. Also mouse is optical. Usually this two output devices use 6-8 W, so changing mouse and keyboard is wasting of budget. 
• Motherboard is quite old, but we still can use it.  We think that there is no point to change motherboard, better to buy new PC. 
• Graphic card is integrated in motherboard, so we can’t change it. And at the same time it’s useless, because existing card works well.

 

Hardware	Price per 1 piece (MYR)	Quantity	Total price (MYR)
Intel® Core™ i3-530 Processor (4M Cache, 2.93 GHz)	360	25	9000
PNY OPTIMA 2GB (2x1GB) Dual Channel Kit DDR 400 MHz	150	13	1950
Antec EA-380D Power Supply EA-380D	130	25	3250
Total			14200