CPU/Mobo Doubts - Can somone answer this??

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MAGNeT

Galvanizer
i had some questions whose answer i was thinking.......cant find them

earlier when i had p3 systems..ppl used to say get max 120gb hard disc..it wont support above that...... why so??????and any article which states that.....????

also how much ram a present comp can have.......

i have some mor basic questions ..regardin electronics stuff..will ask that l8er after i get answer of this 2......
 
Present comp can take max of 4 GB. 4 sticks of 1 GB each. I am talking abt standard PCs.... not servers :P

And I have also heard that thing abt high capacity HDDS..... dunno why people say that.

Hoping for someone else to enlighten us :P
 
For the same reasons why ppl say "AMD???..no they r very hot and unstable..intel is better"

or "u have a 128mb card???...i have 256mb..hah"
 
I think that was an issue with older BIOSes. They werent able to recognise HDD's greater than 32 GB. All the new mobos have no probs at all. And the max RAM supported on 32 bit CPU's is 4 GB, 64 bit systems support 16 million TB :P But as Nikhil said, a PC mobo cannot take more than 4 GB. AMD processors in the past used to heat up quite a bit, but nowadays its the other way around, Intel heats up a lot more than AMD. Yea many people have that misconception that higher VRAM means better card. The number of times ive tried to explain this to my friends. It all depends on the GPU as well. Thats why a 6600 GT 128 MB beats a 6600 vanilla 256 MB.
 
magnet said:
i had some questions whose answer i was thinking.......cant find them

earlier when i had p3 systems..ppl used to say get max 120gb hard disc..it wont support above that...... why so??????and any article which states that.....????

also how much ram a present comp can have.......

i have some mor basic questions ..regardin electronics stuff..will ask that l8er after i get answer of this 2......
Click to expand...

am not sure if yolder comp can handle 120GB, coz of older bios afaik doesn't support more than 32Gb just like huntr said.

Present comp can support upto 4Gb, i.e 1Gb on each slot.
 
@Magnet,
A 32 bit cpu has 32 bit wide registers and can address 32 bit wide memory addresses
so the total memory it can address physically is
2 ^ 32 = 4294967296 = 4GB

A true 64 bit cpu can physically address
2 ^ 64 = 18446744073709551616 = 16 Exabyte.

for reference :
1024 GB = 1 TerraByte = 2 ^ 40
1024 TB = 1 PetaByte = 2 ^ 50
1024 PB = 1 Exabyte = 2 ^ 60
1024 EB = 1 ZettaByte = 2 ^ 70
and so on .....

RE: windows memory management: first you will have to understand the difference between physical memory and virtual memory to better understand these concepts.

Windows currently uses 32 bit wide "virtual memory address scheme" hence it is limited to 4 GB irrespective of howmuch physical memory is installed. this is for your normal versions of windows like XP. This is further divided into 2GB for applications and 2GB for Kernel.

however in newer versions of windows for e.g. server more memory can be mapped and effectively 2 ^ 36 = 64GB can be used. you have to enable a switch in the boot.ini file for that.
i am not sure about that 64GB limit for server ...perhaps someone more knowledgable in these server cases can give a proper reply ....

RE: HDD size limitations.
you will have to know about sector size, cluster size, nos of heads, geometry translation, os based limitations for e.g. FAT-16, FAT-32 , bios limitations etc.....
You can read all about it here
http://www.storagereview.com/guide2000/ref/hdd/bios/sizeOlder.html
 
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magnet said:
i had some questions whose answer i was thinking.......cant find them

earlier when i had p3 systems..ppl used to say get max 120gb hard disc..it wont support above that...... why so??????and any article which states that.....????

also how much ram a present comp can have.......

i have some mor basic questions ..regardin electronics stuff..will ask that l8er after i get answer of this 2......
Click to expand...
Its not the P3 its the BIOS...I used an 80 gig HDD on a P3...no probs. 32 GB was a BIOS limitation and Intel BIOS's addressed this first.

Nowadays there is no problem I have used 160*2 + 250 gigs (RAID 0) = 570 GB, used on a 925X with a P4 3.6. worked fine and blazingly fast.
Whats the max GB limit for HDD's for todays PC's??
 
okk some more doubts......this is regarding ip address.....

earlier i was on night plan of internet...wht ip address i had on tcp/ip properties......and wht i used to c on danasoft site was different......so i never try to use proxies.......

but now wht ip it has on tcp/ip properties same one is being shown on site........why so?????
and whtever proxy ip i type i c a particular different ip only on that site(danasoft)...
 
cmmon guys reply 2 my 2nd set of doubts........

now comes the 3rd set....

when we write a cd as data cd of mp3 it works well with dvd players attach to tv...as it supports mp3.........but sometimes when we write data cd of avi files or movie files it doesnt work...and we need to make vcd(which is damn time consuming)...doesnt the present systems support avi files or wht????
 
1.) Just a small addition to the replies about your 1st query:

earlier when i had p3 systems..ppl used to say get max 120gb hard disc..it wont support above that...... why so??????
Click to expand...

That was cause of a limitation with the ATA standard itself, which had 28-bit LBA (Logical block addressing) which limited the max HDD size to ~ 137GB. So yes, they were right in advising you to stick to 120gig disks.

The current ATA standard has been upped to 48-bit LBA which supports upto 144 PetaBytes (which as Deejay mentioned is 144,000,000 GB). 48-bit LBA requires support from both your OS and your BIOS. AFAIK there is a particular registry setting that has to be added for 48-bit LBA support, even in WinXP.

Personally I found no issues without the registry addition, but I did not see any need to take chances (perhaps someone with better info might shed light on that, or maybe it was cause each of my partitions on the larger disk were still less than 137 gigs). Most major hard disk manufacturers should have some sort of tool related to enabling 48-bit LBA on their site (I use a Seagate drive, and first saw the 48-bit LBA tool while browsing their site)

2.) I have no idea about your 2nd query :P

3.) About your 3rd query, most DVD players these days support the MP3 format and hence have no issues playing them back. MP3 discs in essence are 'data' discs as well.

However in the case of AVI files, the format they use (codecs) will vary tremendously.. from MPEG, DivX, XviD to H.264 etc. Most DVD players have support for only MPEG-2/MPEG-1 formats which are the native formats of DVDs/VCDs respectively. Thats why you would need to convert the AVI file in another format, to the native MPEG-1 VCD format to let it play in your DVD player.

Some of the newer DVD players support DivX, XviD formats too.. and in such players, you can put on your DivX/XviD encoded AVI files directly without any conversion process.
 
The current memory usage i guess would be very much limited by the word length of the processor. 32 = 2^32 and 64 = 2^64. But then again if you use a 32-bit operating system, the memory usage capacity is being limited by the OS

The mapping is very different and is very much based on the operating system that is used. I dunno how windows behave but on the general scale some space is allocated for the kernel, and the rest is for the user processes(heap + other code and data segments).

deejay said:
however in newer versions of windows for e.g. server more memory can be mapped and effectively 2 ^ 36 = 64GB can be used. you have to enable a switch in the boot.ini file for that.
i am not sure about that 64GB limit for server ...perhaps someone more knowledgable in these server cases can give a proper reply ....
Click to expand...

@Deejay - The server box that i use at office has a memory of 48GB put on a UltraSPARC IIIi running Solaris 5.8. Let me see if i can gather more details on that...
 
when we write a cd as data cd of mp3 it works well with dvd players attach to tv...as it supports mp3.........but sometimes when we write data cd of avi files or movie files it doesnt work...and we need to make vcd(which is damn time consuming)...doesnt the present systems support avi files or wht????
Click to expand...

Thats because all VCD players work according to MPEG specifications.They cannot play AVI files as they are not designed to play these.Thats why u need to convert ant video file to MPED (.DAT) files to play on VCD players.

okk some more doubts......this is regarding ip address.....
earlier i was on night plan of internet...wht ip address i had on tcp/ip properties......and wht i used to c on danasoft site was different......so i never try to use proxies.......
but now wht ip it has on tcp/ip properties same one is being shown on site........why so?????and whtever proxy ip i type i c a particular different ip only on that site(danasoft)...
Click to expand...

This may happen even if u don't use a proxy.Your ISP may be using a proxy.
 
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