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標題: 神奇: 四條DDR 1G = 3.6G... [打印本頁]

作者: admin 時間: 2004-5-22 09:29 PM 標題: 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?

作者: yo_sucks 時間: 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...

作者: admin 時間: 2004-5-23 12:33 AM

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

作者: icefire 時間: 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。

作者: admin 時間: 2004-5-23 01:28 AM

oh.
即係3g ram底用d...

作者: betachicken 時間: 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

作者: lolee 時間: 2004-10-21 11:21 AM

厲害,1GX4..牛XX

作者: sinatemp 時間: 2005-2-6 01:53 PM

Originally posted by icefire at 2004-5-23 01:19 AM:
http://taiwan.asus.com.tw/suppor ... amp;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 ...

明白了

厲害!!

作者: betachicken 時間: 2005-2-9 12:27 AM

32bits CPU has 4GB addressing space limit

you need an Athlon64

作者: austin666 時間: 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

作者: pctong 時間: 2005-5-17 10:21 PM

Originally posted by austin666 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

我以前公司已用緊double layer 1G

作者: pctong 時間: 2005-5-17 10:26 PM

Originally posted by pctong at 2005-5-17 10:21 PM:

我以前公司已用緊double layer 1G

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

作者: 趙公子 時間: 2005-5-26 05:26 PM

Originally posted by pctong 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

Ram disk其實唔係咁有用架咋喎

作者: pctong 時間: 2005-6-6 11:29 PM

[quote]Originally posted by 趙公子 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

作者: westsider 時間: 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.

作者: hung414 時間: 2005-11-25 12:01 PM

Originally posted by pctong at 2005-6-6 11:29 PM:
[quote]Originally posted by 趙公子 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

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

作者: acery2k 時間: 2007-3-25 11:06 AM

hehe，notebook 最多插兩條 RAM，暫時唔會有呢種問題

作者: mhkk 時間: 2007-8-17 01:17 AM

4000000000/1024/1024/1024=3.72G左右...

作者: leety112233 時間: 2007-9-24 10:45 PM

Originally posted by mhkk at 2007-8-17 01:17 AM:
4000000000/1024/1024/1024=3.72G左右...

You mis-understading that G=10^9, but actually, G=giga=1024^3

作者: awolswat 時間: 2007-11-22 04:03 PM

算啦,用64bit OS先用得盡

作者: BZ6869 時間: 2007-11-25 10:14 AM

作業系統要換64位元的..

作者: KC-Alen 時間: 2007-11-28 06:37 AM

If you are using windows xp home or either professional windows will only reconize 3gb ram, because its 32 bits, not 64bits, unless u got the windows xp professional 64 bit OS.

Vista 32 do reconize 4gb but, it wont work well with it so its better to take a vista 64 bits, anyway there are still many problems with 64 bits OS working with those 32bits softwares.

as i said before (few months back) There are still many problems with vista u should wait for it, the requirments is to high either, so you computer will be slower then using xp, but this is off-topic.

Just use windows xp with max 3gb .... u dont need more, unless ur going to use it for video editting etc...

作者: KC-Alen 時間: 2008-2-2 07:35 AM

just noticed that vista 32bits not automaticly reconize 4gb only some tweaks.

If you are not doing stuffs like home studio or whatever just keey that 3gb, or 3.65g, you dont need more then needed.

Conclusion:
Only OS with 64 bits reconize it (xp pro 64, n' Vista 64)
Not sure about linux and apple trashes.

(Srry for bumping old topic up, but i felt to correct my post =))

作者: OxygenHK 時間: 2008-7-30 11:27 AM

如果你用Vista, 可用盡4G

作者: joyexp 時間: 2009-10-24 01:44 PM

其實可以用盡4G的,將認唔到的Ram轉到Ram Drive用.
做暫存可加快電腦速度.

作者: x7806105 時間: 2009-12-28 03:23 PM

吾见过哦~~

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