One of the recent commands that I have discovered is lshw. It is used to
obtain detailed information about all of the hardware in a computer. I have
been using it on various Linux boxen and this is the (abridged) output from
one of them:
*-cpu
description: CPU
product: Pentium III (Coppermine)
vendor: Intel Corp.
physical id: 4
bus info: cpu@0
version: 6.8.6
slot: J1
size: 850MHz
capacity: 850MHz
width: 32 bits
clock: 100MHz
capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 sep
mtrr pge mca cmov pat pse36 mmx fxsr sse
*-cache:0
description: L1 cache
physical id: 5
size: 32KB
capacity: 32KB
capabilities: internal varies
*-cache:1
description: L2 cache
physical id: 6
size: 256KB
capacity: 256KB
capabilities: pipeline-burst synchronous internal varies
*-memory
description: System Memory
physical id: c
slot: System board or motherboard
size: 384MB
capacity: 512MB
*-bank:0
description: DIMM DRAM Synchronous 100 MHz (10.0 ns)
physical id: 0
slot: DIMM1
size: 256MB
width: 64 bits
clock: 100MHz (10ns)
*-bank:1
description: DIMM DRAM Synchronous 66 MHz (15.2 ns)
physical id: 1
slot: DIMM2
size: 128MB
width: 64 bits
clock: 66MHz (15.1515ns)
The processor information says that the FSB is running at 100 MHz. The stick
of RAM in bank 0 is also running at 100 MHz. However, according to lshw the
RAM in bank 1 is running at 66 MHz. When I first saw this I figured that the
incorrect type of RAM was installed. Although when I opened up the case, I
saw that both sticks were labeled SDRAM PC-100.
I tried switching the position of the sticks but the 128MB stick still
reports 66 MHz. I also tried running the 128MB stick by itself--same result.
Finally, I removed the 128MB stick and replaced it with a 64 MB stick that
was also labeled SDRAM PC-100. lshw returned a number between 66MHz and
100Mhz (around 90Mhz I think, can't remember exactly) for this other stick.
Could this be a bug with lshw or the sign of a problem with the hardware?
For what it's worth, I have never noticed the computer running strangely. I
am just curious about the numbers that I am seeing.
-Jonathon
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