Ha! I have the same desktop computer! I bought a little Nvidia Geforce 9500 PCI-E card and now have no problems with the /3GB option.

Jason

On 18 Nov 2009, at 08:54, Homin Jiang wrote:

My Windows desktop is Dell OptiPlex 755, Intel Q35 Express chipset onboard graphics.
regards


Jason Manley wrote:
The biggest difference between working /3GB option and not working is the memory card and its driver. It depends how much system memory it's mapping. With the /3GB option, you're only leaving 1GB for kernel address space and everything else. We've had to fit PCI- E graphics cards to our Dell machines (which had onboard graphics previously) to get it to work properly.
The nvidia cards seem to play nicely with the /3GB option.
Jason
On 18 Nov 2009, at 03:41, Zhiwei Liu wrote:
Hello,

For me, I just put the /3GB option in boot.ini. Everything just works fine.

Zhiwei

On Tue, Nov 17, 2009 at 8:42 PM, Homin Jiang <[email protected] > wrote:
Hello:

I am writing this email just for record.
I met the same problem as ZhiWei had in OCt 13,2009 while compiling the tutorial example 4,'poco_wide_10_r311'.

http://www.mail-archive.com/[email protected]/msg00901.html

I followed the suggestion in the emails, put the /3GB option in boot.ini. After rebooting, my Windows desktop didn't function as it was, couple of strange error messages kept popping out and the response is extremely slow. After i removed the /3GB option, it back to normal. So, i am pretty sure the 3GB option made the malfunction of Windows computer.
After searching the internet, i put USERVA = ???? with /3GB option.
At first attempt, i put "/3GB /USERVA = 2500" that means 2.5G user memory. With the USERVA option, the Windows computer functioned well as it should be, but i still got the "out of memory" error message while compiling the wide band tutorial 4 example, 'poco_wide_10_r311'. I also tried to increase USERVA =3030, the compilation of tut4 still failed by "out of memory".

Then i put another option of PAE ,Physical Address Extension,as the website below suggested as :

/PAE /3GB /USERVA = 3030

The compilation of 'poco_wide_10_r311' passed with computer time of 5:18:42. I compiled it again with computer time of 04:15:30.

http://blogs.technet.com/askperf/archive/2007/03/23/memory-management-demystifying-3gb.aspx

Cheers
homin jiang




--Zhiwei Liu


--
Regards,
Homin Jiang(¦¿§»©ú)



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