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  #1  
Old 24th May 2009, 10:01
Member Group
 
Just recently built my computer.

I have put 8GB of RAM & using Windows VISTA. I know it can recognize the amount of 8GB ram because in my computer's properties it displays it has 8GB of RAM, however, when i open up task manager it says physical memory of only roughly 3GB.

Why's that? Or is physical memory of that not related to that?

Thanks
  #2  
Old 24th May 2009, 10:10
Administrator Group
 
32bit can only see (and use) 3.25gb across all memory devices.
__________________

My System: Hybr!d

Processor(s):
AMD Turion 64 x2 TL-64 2.2GHz
Motherboard:
HP nForce 560
RAM Memory:
2GB DDR2 PC2-5300
Graphics Card(s):
Nvidia 7150M Onboard Integrated
Sound Card:
5.1 Onboard Integrated
Hard Drive(s):
250GB 5400RPM SATA300
Optical Drive(s):
18x CD/DVDRW-DL ATA
Case / PSU:
Stock HP
Cooling:
Stock HP
Network / Internet:
10/100 Nic / 10MB Virgin Cable
Monitor(s):
17" WXGA+ HD BrightView Widescreen
Operating System(s):
Windows 7 Ultimate 32Bit
  #3  
Old 24th May 2009, 10:18
Member Group
 
So what happened to the other 4.75GB? Are they getting used?

In that case if i install a new Windows VISTA 64 bit over my 32-bit, does that mean it can see & use the whole 8GB? Its like i don't want my other RAM to go unused...
  #4  
Old 24th May 2009, 10:26
Administrator Group
 
Nope, the remaining is useless. Carbon explained it once, but basically 32bit can only see and use 3.25gb, no exception.
  #5  
Old 24th May 2009, 10:31
Member Group
 
OK. what about 64 bit? They can see + use all 8GB. Am i correct to assume that?
  #6  
Old 24th May 2009, 10:42
Administrator Group
 
  • Vista Basic 64-bit: 8 GB
  • Vista Home Premium 64-bit: 16 GB
  • Vista Business/Enterprise/Ultimate 64-bit: 128+ GB
  #7  
Old 24th May 2009, 11:02
Member Group
 
Thanks thats great info. I remember seeing it somewhere before after you reminded me.
So looks like now am going to install a 64bit Vsita over my 32
  #8  
Old 24th May 2009, 11:05
Administrator Group
 
I dont think you can upgrade either, only fresh install... :\
  #9  
Old 24th May 2009, 11:34
Member Group
 
just to confirm Hybrid, you do have to do a totally fresh install aka you loose everything that's not backed up!

Is rather annoying, but imagine its due to using a totally different architecture to 32bit.
  #10  
Old 24th May 2009, 11:51
Member Group
 
I understand your point. Then this leads me onto further questions of:
what is it like to use the 64-bit architecure? is it faster? performance wise? and will my hardware all support 64-bit, i dont know? Is it true that some softwares dont work on 64-bit architectures?
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