# RAM (Maximum) Configuration

**URL:** <https://forums.suse.com/t/ram-maximum-configuration/28570>\
**Category:** SLES Install-Boot\
**Created:** [August 25, 2016, 9:01pm UTC](https://forums.suse.com/t/ram-maximum-configuration/28570 "2016-08-25T21:01:54Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![acastaneda32](https://avatars.discourse-cdn.com/v4/letter/a/cab0a1/32.png) [@acastaneda32](https://forums.suse.com/u/acastaneda32)\
**Post date:** [August 25, 2016, 9:01pm UTC](https://forums.suse.com/t/ram-maximum-configuration/28570/1 "2016-08-25T21:01:54Z")

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We are using a SLES VM (VMware) and are trying to increase the RAM on a system. We currently have 980GB of RAM and are trying to add an additional 380GB. When trying to do so in vCenter, we are not allowed to increase it above 1TB. We checked and we are using ESX 6.0 (update 2) and were told it supports up to 4TB. Where can I determine what the max amount of RAM allowed with SLES 11 SP3?

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**Author:** ![malcolmlewis](https://sea2.discourse-cdn.com/flex022/user_avatar/forums.suse.com/malcolmlewis/32/11375_2.png) [@malcolmlewis](https://forums.suse.com/u/malcolmlewis)\
**Post date:** [August 25, 2016, 9:13pm UTC](https://forums.suse.com/t/ram-maximum-configuration/28570/2 "2016-08-25T21:13:49Z")

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Hi  
The release notes… if it’s x86\_64 then, certified for 16 TIB  
[https://www.suse.com/releasenotes/x86\_64/SUSE-SLES/11-SP3/#TechInfo.Kernel](https://www.suse.com/releasenotes/x86_64/SUSE-SLES/11-SP3/#TechInfo.Kernel)

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**Author:** ![ab1](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@ab1](https://forums.suse.com/u/ab1)\
**Post date:** [August 25, 2016, 9:33pm UTC](https://forums.suse.com/t/ram-maximum-configuration/28570/3 "2016-08-25T21:33:11Z")

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I have customers running 2 TiB on SLES boxes; you should be fine. If you  
CANNOT change it higher, meaning VMware is not letting you, then probably  
check with them. If no more than that shows up when booting, then that’s  
kind of weird. How are you determining the amount there?

–  
Good luck.

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<div class="post-metadata">

**Author:** ![acastaneda32](https://avatars.discourse-cdn.com/v4/letter/a/cab0a1/32.png) [@acastaneda32](https://forums.suse.com/u/acastaneda32)\
**Post date:** [August 25, 2016, 11:23pm UTC](https://forums.suse.com/t/ram-maximum-configuration/28570/4 "2016-08-25T23:23:42Z")

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Thanks. Is there a way to confirm that there’s nothing limiting the max RAM allowed? In the OS or even the BIOS?

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**Author:** ![ab1](https://avatars.discourse-cdn.com/v4/letter/a/d2c977/32.png) [@ab1](https://forums.suse.com/u/ab1)\
**Post date:** [August 26, 2016, 5:06pm UTC](https://forums.suse.com/t/ram-maximum-configuration/28570/5 "2016-08-26T17:06:49Z")

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In the OS: there isn’t; the kernel supports tons of RAM, and there is  
no-longer a separate installation for “big-smp” systems with lots of RAM,  
or for x86\_64 system separately from x86\_32 systems with lots of RAM.

The BIOS is virtual, so check with your virtualization provider (VMware I  
think you said).

–  
Good luck.

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show your appreciation and click on the star below…