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OS/2 - Technical => Hardware => Topic started by: BigWarpGuy on 2008.07.20, 02:58:36

Title: 3 gigs of ddr memory?
Post by: BigWarpGuy on 2008.07.20, 02:58:36
I saw an ad for a barebones box with 3 gig of ddr memory. Can eCS be able to see and use 3 gig of ddr memory?
http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=4007981&sku=B450-2230%20B&SRCCODE=WEM1658SS&cm_mmc=Email-_-Main-_-WEM1658-_-components (http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=4007981&sku=B450-2230%20B&SRCCODE=WEM1658SS&cm_mmc=Email-_-Main-_-WEM1658-_-components)
Title: Re: 3 gigs of ddr memory?
Post by: Saijin_Naib on 2008.07.20, 07:29:45
Yeah, should be under the 4gb ceiling of fail.
Title: Re: 3 gigs of ddr memory?
Post by: cytan on 2008.07.20, 20:21:22
Quote from: BigWarpGuy on 2008.07.20, 02:58:36
I saw an ad for a barebones box with 3 gig of ddr memory. Can eCS be able to see and use 3 gig of ddr memory?
http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=4007981&sku=B450-2230%20B&SRCCODE=WEM1658SS&cm_mmc=Email-_-Main-_-WEM1658-_-components (http://www.tigerdirect.com/applications/searchtools/item-Details.asp?EdpNo=4007981&sku=B450-2230%20B&SRCCODE=WEM1658SS&cm_mmc=Email-_-Main-_-WEM1658-_-components)

I have 3 GB of DDR memory. eCS works fine with it. However, the bigger problem isn't the 4GB limit but shared and virtual memory. See the article in this month's os2voice:

http://www.os2voice.org/VNL/past_issues/VNL0708H/feature_3.html

We really, really need a new kernel or a fix for the 512MB limit. With today's memory hog apps like all the mozilla apps and openoffice, I'm hitting this limit easily.

cytan

Title: Re: 3 gigs of ddr memory?
Post by: RobertM on 2008.07.20, 23:27:09
4GB works fine for me - within the contraints noted below.

Here's a related question for which I have heard different answers...

What is the memory limit on quad CPU machines? I have heard it is 4GB total, and I have heard it is 4GB per CPU (16GB total).

I've also heard the same thing for threads... 4096 total - and 4096 per CPU (16384 total in that scenario).

Does anyone know which information is accurate? I have 2 quad CPU machines, each with 4GB... I'd rather not spend money raising them to 8GB or 16GB if (a) it wont work, and/or (b) if it causes problems because of unaddressable (but reported to the OS) memory.

Someplace I heard that there is a 36bit memory addressing switch that the Intel CPUs support allowing 8GB access... but I am unsure if (a) that is relevant (since there are technically enough CPUs to handle up to 16GB), or (b) if OS/2 supports it.

Anyone?

Thanks,
Robert