4G memory, only 3.8G can use

wangsiyuan · 2011-09-03 00:49:58

hi:
my computer is 4G memory, graphics card is Radeon HD 2400 PRO/256M memort, i installed archlinux x_64.
in system monitor, only 3.8G memory can be seen, why?
thank you

jasonwryan · 2011-09-03 01:13:53

https://bbs.archlinux.org/viewtopic.php?id=62696

https://bbs.archlinux.org/viewtopic.php?id=47366

karol · 2011-09-03 01:28:20

http://support.microsoft.com/kb/929605 can give you ideas too.

wangsiyuan · 2011-09-04 11:06:16

jasonwryan wrote:

https://bbs.archlinux.org/viewtopic.php?id=62696
https://bbs.archlinux.org/viewtopic.php?id=47366

1. i can't find choices about memory in my bios setting, my computer is dell.
2. when i try to compile kernel 3.0, i also can't find setting about memory.

is that because my graphics cart use this memory?

Radioactiveman · 2011-09-04 12:06:23

Yea, I think your card uses "HyperMemory".

graysky · 2011-09-04 13:01:45

+1 - the gfx card is stealing that memory. It's normal. You can potentially adjust this amount in your BIOS.

wangsiyuan · 2011-09-05 01:19:06

graysky wrote:

+1 - the gfx card is stealing that memory. It's normal. You can potentially adjust this amount in your BIOS.

1.how can i know whether my graphics card use my memory?my graphics card has 256M memory its own.
2.how can i fix it in bios? my bios dosen't has this setting.
thank you!

graysky · 2011-09-05 08:35:57

@op - if it's not shared memory then perhaps reservered by your system. I dunno about your specific hardware. I wouldn't worry about it.

example: http://www.zotacusa.com/forum/topic/171 … #entry2621

wangsiyuan · 2011-09-05 14:17:18

graysky wrote:

@op - if it's not shared memory then perhaps reservered by your system. I dunno about your specific hardware. I wouldn't worry about it.
example: http://www.zotacusa.com/forum/topic/171 … #entry2621

in my computer, Memtest86+ sees 4300M, free -m sees 3900M
thank you for your post.

graysky · 2011-09-05 14:41:41

4300M is too much, no? 1024x4=4096. Dunno about your hardware. I wouldn't worry about it.

Awebb · 2011-09-05 15:17:23

Memory hole for PCIE and similar. It's normal.

wangsiyuan · 2011-09-06 02:40:55

Awebb wrote:

Memory hole for PCIE and similar. It's normal.

do you mean there is nothing wrong with my hardware settings and my archlinux?
thank you for your post

wangsiyuan · 2011-09-06 02:49:31

graysky wrote:

4300M is too much, no? 1024x4=4096. Dunno about your hardware. I wouldn't worry about it.

i really cant find these settings in my bios.
by the way, how much is your computer's memory? how much can you see in 'free'?
thank you for your posts these days, i appreciate it, thank you

graysky · 2011-09-06 07:47:00

Mine has 8 G on it and free -m shows 8004. We have different motherboards.

$ free -m
             total       used       free     shared    buffers     cached
Mem:          8004        919       7085          0         27        360
-/+ buffers/cache:        531       7473
Swap:            0          0          0

wangsiyuan · 2011-09-08 02:09:10

graysky wrote:

Mine has 8 G on it and free -m shows 8004. We have different motherboards.

$ free -m
             total       used       free     shared    buffers     cached
Mem:          8004        919       7085          0         27        360
-/+ buffers/cache:        531       7473
Swap:            0          0          0

oh, i thought swap partition is ecessary before, next time i won't make a swap partition

Arch Linux

#1 2011-09-03 00:49:58

4G memory, only 3.8G can use

#2 2011-09-03 01:13:53

Re: 4G memory, only 3.8G can use

#3 2011-09-03 01:28:20

Re: 4G memory, only 3.8G can use

#4 2011-09-04 11:06:16

Re: 4G memory, only 3.8G can use

#5 2011-09-04 12:06:23

Re: 4G memory, only 3.8G can use

#6 2011-09-04 13:01:45

Re: 4G memory, only 3.8G can use

#7 2011-09-05 01:19:06

Re: 4G memory, only 3.8G can use

#8 2011-09-05 08:35:57

Re: 4G memory, only 3.8G can use

#9 2011-09-05 14:17:18

Re: 4G memory, only 3.8G can use

#10 2011-09-05 14:41:41

Re: 4G memory, only 3.8G can use

#11 2011-09-05 15:17:23

Re: 4G memory, only 3.8G can use

#12 2011-09-06 02:40:55

Re: 4G memory, only 3.8G can use

#13 2011-09-06 02:49:31

Re: 4G memory, only 3.8G can use

#14 2011-09-06 07:47:00

Re: 4G memory, only 3.8G can use

#15 2011-09-08 02:09:10

Re: 4G memory, only 3.8G can use

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