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September 4th, 2005 13:00

CPU usage shoots up

Hi I would like some advice.
 
I have a DELL 8400 which has 1024MB RAM and 250GB hard drive and im running XP SP2.
 
Thing is I notice when doing a couple processes that my CPU usage shoots up. I wouldnt call the number of processes alot, there just ones that are needed.
 
How would you go about improving things so the CPU usage isnt shooting up to 100% as it is when say I run a scan with Spysweeper or other programme?
 
I notice I have like 220GB free which I think is alot but with my RAM I only have 55% free of that 1024MB.
 
Can someone give me advice on whats the best thing to do please to improve this.
 
Thank you.
 

2.2K Posts

September 5th, 2005 15:00

The CPU is always going to run as fast as it can whenever it has some work to do, like a system scan. It only throttles back when waiting for other system components to do their job, or when the work is done. Notebooks can be throttled back to preserve battery power when necessary, but I'm not sure if there is anything like that for desktops or not. The CPU contains protection circuitry to throttle back if it begins to overheat, but that will not occur if the cooling system is performing adequately.
 
The 55% free RAM figure may fluctuate as you use different and multiple applications, but Windows will use as much RAM as it can in anticipation of your needs, by copying files from the hard drive to the RAM. I'm no expert, but I believe most of the primary Windows components and all your hardware drivers are loaded into RAM, as well as many other files, as long as you have the room. The CPU only works directly with data in RAM, and only accesses the hard drive to move data back and forth from RAM. Even though you have more room in RAM, Windows XP doesn't anticipate which application(s) you might be running next. A 55% free RAM figure means Windows has loaded nearly 512MB of data from the hard drive into RAM in preparation to serve your needs, and that's a good thing.
 

GM

4.4K Posts

September 5th, 2005 19:00

To add to what Greymack says.

Windows will gracefully release RAM as and when an app needs it. So your RAM is being utilised to best advantage at all times to optimise system performance. No point having it unused, is there.

Message Edited by JRosenfeld on 09-05-2005 09:45 PM

2.7K Posts

September 8th, 2005 08:00

make sure you have hyper threading on it will help with running multiple tasks... and some programs is probably bloated and eating the ram....

you can download process explorer free its will tell you whats hoging all the ram and its free

----------
Dimension 8300
P4 CPU 2.80GHz 800MHz BIOS A05
1024MB DDR-SDRAM 400MHz
Sparkle 6600GT 128mb 500mhz/1000mhz
BearPaw 2400TA Scanner
USB 2.0 tv tuner
NEC DVD+RW ND-2100AD
Pioneer 16x DVD+/-RW DL DVR-109
HP usb CD-Writer+ 8200
256Mb-64mb Usb drives
Wacom graphire3 4x5inch
Creative SB Live!
Conexant SmartHSFi V.9x 56K DF PCI Modem ,ADSL DSL-200
HP deskjet 3550
seagate sata 120Gb
seagate sata 160Gb
seagate usb2 external 200Gb
15inch LCD
pci cooler
7749 3dmark03
3200 3dmark05
PCmark05 3364

94 Posts

September 8th, 2005 08:00

How do you tell you have hyper threading on ?

94 Posts

September 8th, 2005 09:00

I looked in Hardware but only see 1 processor. Am I looking in the right place?

2.7K Posts

September 8th, 2005 09:00

right click my computer../ properties/ device manager/ in the root list lick processors, ifit shows there are two of them, then you have hyper threading enabled

September 8th, 2005 16:00

It will display two logical processors if HT is enabled. If not, go into your system BIOS and change the hyperthreading setting to "on." I don't know why, but some Dell systems shipped with the setting defaulted to off.

94 Posts

September 8th, 2005 23:00

Thanks,
 
I noticed in my BIOS Hyper Threading was not enabled, it is enabled now.
 
Under Hyper Threading there is HDD Acoustic Mode now I dont know what that is exactly but its set on bypass, would this be correct or would that need altering?
 
The four options for HDD Acoustic are Bypass, Quiet, Suggested and Performance.
 
Which should it be set on?
 
Many thanks.
 
Adam.

Message Edited by Adam. on 09-08-2005 07:35 PM

September 9th, 2005 02:00

I'd go with performance as HDDs really don't make that much noise anyways.

94 Posts

September 9th, 2005 05:00

Ok i'll go with that unless anybody knows different? :smileyvery-happy:

I would of thought Hyper Threading would of been switched on, its lucky you said :smileyhappy:

2.7K Posts

September 9th, 2005 06:00

notice any difference with hyper threading on?

94 Posts

September 9th, 2005 06:00

To be honest I dont :smileyvery-happy: What should it be doing? I cant say I notice any speed difference.

2.7K Posts

September 9th, 2005 06:00

it will allow you to multitask better,,, alt ctrl delete and you should see one core processor and one logicial processor and their usage, if you don't click view/cpu history and enable two cpus...

94 Posts

September 9th, 2005 09:00

Thanks:smileyhappy: I have noticed it now since doing a few things.
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