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admin 發表於 2004-5-22 09:29 PM

神奇: 四條DDR 1G = 3.6G...

神奇: 四條DDR 1G = 3.6G...
有沒有人有同樣情況?

yo_sucks 發表於 2004-5-23 12:26 AM

It happens particularly when most of the mother boards now in the market come with on-board video, which shares some of the momery though...

admin 發表於 2004-5-23 12:33 AM

bios already set video use 16M only.
2 DDR = 2G
3 DDR = 3G
4 DDR = 3.6G
terrible.

icefire 發表於 2004-5-23 01:19 AM

http://taiwan.asus.com.tw/support/faq/qanda.aspx?KB_ID=87812&SLanguage=zh-tw

這是因為PCI 的規範原因,當安裝4GB記憶體時,系統只能偵測到3.6GB左右,是因為系統資源(包括ICH南橋晶片、主機板上所安裝的AGP/PCI卡以及其他onboard 裝置)會重新對應到高層的記憶體位址空間,由於在現今32位元的x86個人電腦系統架構下,會從4GB開始以下佔用,因此,系統開機時會顯示少於4GB記憶體,這是現今32位元的x86個人電腦系統架構下正常的現象 。

admin 發表於 2004-5-23 01:28 AM

oh.
即係3g ram底用d...

betachicken 發表於 2004-9-4 10:29 PM

you need a Athlon64 (x86-64 platform) in order to overcome this limit

it's very common on x86 platform where everythign is 32 bits

lolee 發表於 2004-10-21 11:21 AM

厲害,1GX4..牛XX

sinatemp 發表於 2005-2-6 01:53 PM

[quote]Originally posted by [i]icefire[/i] at 2004-5-23 01:19 AM:
[url]http://taiwan.asus.com.tw/support/faq/qanda.aspx?KB_ID=87812&SLanguage=zh-tw[/url]

這是因為PCI 的規範原因,當安裝4GB記憶體時,系統只能偵測到3.6GB左右,是因為系統資源(包括ICH南橋晶片、主機板上所安裝 ... [/quote]

明白了:lol:
厲害!!

betachicken 發表於 2005-2-9 12:27 AM

32bits CPU has 4GB addressing space limit

you need an Athlon64

austin666 發表於 2005-2-21 09:56 PM

**** 作者被禁止或刪除 內容自動屏蔽 ****

pctong 發表於 2005-5-17 10:21 PM

[quote]Originally posted by [i]austin666[/i] at 2005-2-21 09:56 PM:
4g ddr

咁你部腦要不要$25000


我公司有部腦張video card 差不多$20000
不過我都係用黎睇下dvd,上下網
都吳知咁勁攪乜q野
d公司錢多就+俾我好過啦 [/quote]
我以前公司已用緊double layer 1G

pctong 發表於 2005-5-17 10:26 PM

[quote]Originally posted by [i]pctong[/i] at 2005-5-17 10:21 PM:

我以前公司已用緊double layer 1G [/quote]
本身用 1G ram 間了256mb 做phy hardisk, 專用來downlad 野同render movie, 但 bad is reboot 就clear, coz 佢係實體ram

趙公子 發表於 2005-5-26 05:26 PM

[quote]Originally posted by [i]pctong[/i] at 2005-5-17 10:26 PM:

本身用 1G ram 間了256mb 做phy hardisk, 專用來downlad 野同render movie, 但 bad is reboot 就clear, coz 佢係實體ram [/quote]

Ram disk其實唔係咁有用架咋喎

pctong 發表於 2005-6-6 11:29 PM

[quote]Originally posted by [i]趙公子[/i] at 2005-5-26 05:26 PM:


其實唔係咁有用
但速率會快過你靠software 計數,風險就係reboot 同hang 機果時
total lose

westsider 發表於 2005-8-24 12:21 AM

I'm using dual-Opteron cluster, one of the node has:

XXXX$ free
             total       used       free     shared    buffers     cached
Mem:       3993380     565832    3427548          0      68376     288496
-/+ buffers/cache:     208960    3784420
Swap:      1020116          0    1020116

XXXX$ head -n 5 /proc/cpuinfo
processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 15
model           : 5
model name      : AMD Opteron(tm) Processor 248

so for "4GB" ram
there're 3.993380 X 10^9 BYTES
but 3993380/1024/1024=3.808 GB
it really depends on the definition.

hung414 發表於 2005-11-25 12:01 PM

[quote]Originally posted by [i]pctong[/i] at 2005-6-6 11:29 PM:
[quote]Originally posted by [i]趙公子[/i] at 2005-5-26 05:26 PM:


其實唔係咁有用
但速率會快過你靠software 計數,風險就係reboot 同hang 機果時
total lose [/quote]

but u got a fast access time HD wor (Virtual one),
u save time, u pay for data lost
it is a balance of risk

acery2k 發表於 2007-3-25 11:06 AM

hehe,notebook 最多插兩條 RAM,暫時唔會有呢種問題 :)

mhkk 發表於 2007-8-17 01:17 AM

4000000000/1024/1024/1024=3.72G左右...

leety112233 發表於 2007-9-24 10:45 PM

**** 作者被禁止或刪除 內容自動屏蔽 ****

awolswat 發表於 2007-11-22 04:03 PM

算啦,用64bit OS先用得盡

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