Hello, I have a compaq presario 900 (from 2002) with the following configuration :
 
cpu : amd athlon 1500+
ram : 256 mb PC2100
hdd : 20 gb  
grafics card : mobility u1
screen : 15''
 
my question is if I can upgrade the cpu - I did some googling and found that the cpu is socket-A  
Can I put every socket-A cpu I like or do I heve to take something in mind? (perhaps the FSB or Vcore)
 
What I did to start my upgrade is buying 512 mb ram pc2100 and I also want to buy a larger Hdd
 
PS 1 : I can't afford buying a new lapton so I want to upgrade it  
     2 : it's my first post so if I'm doing something wrong tell me
 
Thanks !  
 
 
 

 
can I upgrade it with this one?

help me!!!
any cpu,hdd,dvd combo upgrade ideas are welcome!!!

a few more characteristics of my laptop (I used cpu-z)
 

 

 

 

 

 

The biggest problem is finding out what the specific chipset can handle in terms of CPU upgrades. ATM, I can hardly find any info about your motherboard. This may be something you can talk to AMD/ATI about through their support.
 
The other thing you need to consider is whether or not you are actually going to be able to find a CPU that will work. You may want to consider saving your money at this point to get a new system.

well I upraded my memory from 256MB to 768 and the hdd from 20GB to 250GB.  
The RAM works fine but with the HDD upgrade I have the following problem:
Every time I the HDD is working the CPU goes up to 90-100% and the whole laptop is VERY slow. Do you know why this could happen?
 
 the new hdd is : WESTERN DIGITAL WD2500BEVE HDD 2.5'' 250GB ATA
the old hdd is : toshiba 20GB, IBM IC25N020ATCS04-0, ATA-5, UDMA-100
 
I used aida and did a few benchmarks which were I bit weird...  
 
TYPE OF BENCHMAR        OLD HDD                NEW  HDD
                  CPU MB/S      CPU                    MB/S
LINEAR READ  7% 19 NO RESULT NO RESULT
QUICK LINEAR READ 7% 17.2 NO RESULT NO RESULT
RANDOM READ 7% 16.7 NO RESULT NO RESULT
BUFFERED READ 4% 19.9 100%                    2,05
AVERAGE ACCESS  2% 21.7 3%                    17,8

can't anybody help me????