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System RAM Bottleneck with Quadfire???

{SAS}TB

{SAS}TB

{SAS}TB

Soldato
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Hello !

I am currently RMAing one of my 4870x2 (long, different story :P)

Whilst googling the problem I noted a few posts on various forums about quadfire performance being bottlenecked by the amount of system RAM.

One in particular:

"Be advised that such a setup would basically force you to use a 64 bit OS, since you WILL run smack into the 4GB address space limitation inherent in any 32 bit OS:

4870X2 (1GB of memory mapped I/O) times two = 2GB of address space consumed
500~750MB worth of address space required for the Bios, communications and system devices

You are now at 2.5~2.75GB of address space, and only have 1.5GB left for RAM. And it's been a year or three since 1GB was considered excellent for gaming purposes.."

I know the above refers to using a 32bit OS - But IF the above is correct then would 4GB of RAM on a 64bit OS hinder a quadfire 4870x2 set up ?

Cheers

TB
 
As far as I'm aware no. x64 operating systems can use up to 2 Terabytes of RAM (something like that).

My current system had 8GB of RAM and a 1GB Graphics card without issues on both XP 64 and Vista 64.

Hope this helps,

P0wda
 
Sorry if I am being unclear

What I mean is given the above would having 4GB of system RAM on a 64bit OS restrict / bottleneck 2x4870x2s ? Would upping the amount of RAM (say 8gig) help this

Thanks again

TB
 
no not on 64bit OS, on 32bit yes, and someone runining 2 2Gb cards on 32 is a muppet:p
 
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