標題: 430 W 火牛夠唔夠推 i7.. [打印本頁]

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作者: m23    時間: 2012-5-19 18:15     標題: 430 W 火牛夠唔夠推 i7..

而家用緊 Antec Neo Power 430,
諗住想 upgrade 上 i7 3770K /3770S + Z77 + 7750/7770 版..
唔知夠唔夠火數呢？
如果唔夠，又要大約幾多先夠呢？
先謝！

現 Config 如下:
Phenom FX 5000
ATI HD 4650
AMD 790 GX

其他用番原本O個 D ..
12X BR-RW
24X DVD-RW
1.5TB HDD
120GB SSD
USB 3.0 Add-on card

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作者: TeraBytes    時間: 2012-5-19 18:19

冇問題

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作者: m23    時間: 2012-5-19 18:29




    Thanks~!

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作者: GD唔GD    時間: 2012-5-19 21:11



請教chihg如何計算樓主名單的 W數

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作者: tuyylihk    時間: 2012-5-19 21:43

回復 4# GD唔GD
呢度成堆人用高級過樓主不知幾多既機測過啦
根本除非用到最高階
400W乜機都夠，超埋都得
除左少數12V奇低既老牛或爛牛

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作者: TeraBytes    時間: 2012-5-19 21:48



以前d人用Pentium D咪又係用400w牛去推...
何況樓主果堆7野全部都慳電過以前D機一大截, full load俾盡佢咪用250w...

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作者: m23    時間: 2012-5-19 23:51



其實我都係見而家 D 機閒閒地都 500/600W 火牛，
先會擔心自己隻牛夠唔夠力...

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作者: TeraBytes    時間: 2012-5-19 23:55



好多時買500W未必因為佢輸出大...
而係依家細火數牛用料都好雞, 迫住用大牛... 又或者想買modular型號...

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作者: TeraBytes    時間: 2012-5-19 23:56

我買corsair hx520都係因為佢係modular, 實際上成部機既loading有95%時間都唔夠100W...

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作者: m23    時間: 2012-5-20 00:01



其實而家隻牛買O個陣都唔平，
冇記錯都差唔多 500...

唔駛換的話，可以高一級 CPU 了

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作者: TeraBytes    時間: 2012-5-20 00:03



買塊好D既板玩K U

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作者: m23    時間: 2012-5-20 00:07




    都係睇緊 Gigabyte 同 Asus Z77

反而諗緊 Display 可能會遲D 先買...

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作者: hioohi    時間: 2012-5-20 12:13

回復 4# GD唔GD


    cpu 少過77W
7770~83W
其他野加埋5,6十W

成個Config~200W

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作者: wilsonkf    時間: 2012-5-20 14:33

提示: 作者被禁止或刪除 內容自動屏蔽

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作者: asvin    時間: 2012-5-20 18:43

回復 1# m23

用緊CM GX450W 行你個spec
No problem!

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作者: au1990    時間: 2012-5-20 19:57

回復 7# m23


    要有番咁上下好既牛，無500W都無得揀
    就好似HCG呢D叫好少少既牛，香港最細都要520W
    雖然ANTEC出左4XXW既白金牛，但又鬼到死左...

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作者: Miipp    時間: 2012-5-20 22:25



我以前買左隻 seasonic SII 330W 比部動物機用.

因為代理要大利錢, 所以唔入細火數. 人地廠機都好多都係用 100~200W 牛牛

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作者: au1990    時間: 2012-5-21 00:47

回復 17# Miipp


    S12II都係近期先有賣，以前想搵隻好少少既低WATT牛都真係好難-口-

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作者: rexma    時間: 2012-5-21 04:42

no problem with no extra display card

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作者: LikMan727    時間: 2012-5-21 06:52

夠.....不過有大買大

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作者: triforce    時間: 2012-5-21 09:12

3770 95w 加張670gtx 都仲得

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作者: gary0723    時間: 2012-5-21 10:11

提示: 作者被禁止或刪除 內容自動屏蔽

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作者: XXXXPLAY    時間: 2012-5-21 11:10

其實正常用好小真係去到430w

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作者: GD唔GD    時間: 2012-5-21 15:07



完全明白, 原來依家D人動不動則用600, 800W的火牛是用來壯膽, 壯大List 聲勢啫.

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作者: asvin    時間: 2012-5-21 17:11



咁又未必
一般80+牛最efficient就係50%嗰個位，呢個係有D人買牛買大一倍既原因

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作者: Miipp    時間: 2012-5-21 21:37



更係唔係近期啦, 我係好耐前同 pcbulb 買架.
係建 x 太奸唔入細火數

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作者: Miipp    時間: 2012-5-21 21:38



師兄咁講唔覺得太軒強嗎?

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作者: FlyingForever    時間: 2012-5-21 21:50


問題係平均負載遠少於50%……
大部分機full load都係得果200w上下…平平一般唔超過100w

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作者: asvin    時間: 2012-5-21 23:08

真正玩高階牛既，點會剩係開兩三個鐘打文件呢?
點都長開玩下超頻，SLI/CF，水冷咁啦...

當然，我都真係見過有人拎隻AX750黎做文書機既

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作者: asvin    時間: 2012-5-21 23:12



每日開個幾個鐘係唔覺既，開7x24再睇張電費單就會明白...

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作者: Miipp    時間: 2012-5-21 23:15



講下數先講, 睇下要幾多年的電費先 cover 到

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作者: au1990    時間: 2012-5-21 23:26

回復 26# Miipp


    我見HCG有400W都無入嫁喎

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作者: Jamie06    時間: 2012-5-22 00:00

你要留意顯卡用電需求... 換新顯卡時候

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作者: asvin    時間: 2012-5-22 01:15

本帖最後由 asvin 於 2012-5-22 01:19 編輯


A brief calculation:

Sample 1. 80plus Gold 800W
Sample 2. 80plus 800W
Sample 3. Normal 800W

For sample 1, 50% load typically has above 90% efficiency, for simplicity, i use 90%(actually higher)
For sample 2, 50% load typically has above 80% efficiency, for simplicity, i use 80%(actually higher)
For sample 3, 50% load typically has above 70-75% efficiency, for simplicity, i use 75%(actually more or less)

For the advanced user, normally the system power consumption is above 400W, i use 400W as a benchmark here
sample 1 real input power = 400/0.90 = 444.444W
Sample 2 real input power = 400/0.80 = 500W
Sample 3 real input power = 400/0.75 = 533.333W

The unit for measuring electricity consumption for electric companies is kWh(kilowatt-hour).Here is the conversion,

Pre-assumption:
1. The computer is switched on 24 hours for 7 days (whole week)
2. For simplicity, 30 days per month is assumed.
3. The PSUs work as efficient as it is stated

The electricity used in 1 month for,
Sample 1: 444.444*1/1000*24*30 = 319.99kWh
Sample 2: 500*1/1000*24*30 = 360kWh
Sample 3: 533.333*1/1000*24*30 = 383.999kWh

For the fee, for CLP, first 400 units cost 77.8cents per kWh, plus 17.8 cents per kWh fuel clause charge
(but normally, only a few homes will use fewer than 400 units...and the next step is 89.3cents per kWh, plus 17.8 cents per kWh fuel clause charge )

The electricity fee per month for CLP
Sample 1: 319.99*(0.778+0.178) = $305.91
Sample 2: 360*(0.778+0.178) = $344.16
Sample 3: 383.999*(0.778+0.178) = $367.10

Difference compare to 80plus Gold:
sample 1: N/A
sample 2: 344.16-305.91 = $38.25 per month
sample 3: 367.10-305.91 = $61.19 per month

The calculation for HK Electric is much more complicated, sorry for skipping it. However, it should be more or less the same, or even higher.

Sample 2: 38.25*12 = $459
sample 3: 61.19*12 = $734.28

From above, the cost can be covered within 2 years

PS: My typing is extremely slow in chinese , sorry for my bad english
Also, the values of other factors are omitted, e.g. noise & heat produced, second-hand values, etc.

Please feel free to tell me if any mistake is made, thanks!

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作者: m23    時間: 2012-5-22 02:16



你個 assumption 係假設左部電腦整套電腦一年 365 日都係 full load...
但正常跟本唔會，
而且係連 half-load 都未必有 ...

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作者: avdaemon    時間: 2012-5-22 09:17



idle 60w fullload 280w 之嘛. 真喺識計數就吾會買金牛啦，照日常使用十年都未慳到,有錢買金牛,冇錢買計電錶

http://www.hkepc.com/7715

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作者: asvin    時間: 2012-5-22 09:38



of course for PSUs below 20% load, there is not much differences for 80plus or not and the efficiency is only fair even in a 80plus gold PSU(~60-70%)
But here I'm not talking about the normal office machines that only consume about <100W in idle, I'm talking about some advanced machines such as DIY workstations. For example, it is just not difficult for a DIY quadro workstation to work over 12 hours a day for over 300W for a graphic designer. Also, for the users with multi-display cards. The load power consumption can be much higher than 400W when in use.
Moreover, if 400W is higher than average, The amount can be halved (i.e. 200W)or 1/4(100W)for calculation. Since it is in linear(only additions and multiplications involved), the year required to cover the cost is just doubled or quadrupled. Usually high-end PSUs have longer warranty period than normal(>=5years), it is still protected within the "cost-redeeming"period. That's one of the benefits.
In addition, As I have said before, the values of silence, coolness to the consumer and the salvage value that can help the second-hand price are omitted in this calculation.

Anyway, for normal users, PSU is not really needed to be such advanced.

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作者: Miipp    時間: 2012-5-22 22:40



師兄, 你的計算過份 extreme 了, 現實根本很難出現.

case 1 & 2 已經不太合乎實情 (case 3 是古懂牛, 不看也罷), 而家 80+ 的牛就算係入門型號大多數已經是銅牌, 銅牌已經比白牌好好多, 效率較白牌接近金牌.
你所指的 400W 機基本上最少係頂級單蕊 display 卡骨灰級數的機. 我想像唔到有咩情況會 24 小時 365 日 full load graphic card 囉. 除非那是特殊業務用機器, 我們是在討論這領域的東西嗎?

一部電腦, 平時也會上網文書吧, 在這些情況下, 高階機的功率大多也是 ~100W .
計算各種綜合應用, 低功耗掛機 (non-3D) 模式及關機時間, 365*24 的平均功耗絕對大大底過 400W.

"the cost can be covered within 2 years..." 我相信這句話只會出自大功耗火牛的代理之口

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作者: asvin    時間: 2012-5-22 22:53



my last sentence in the previous paragraph summed  up your view
"Anyway, for normal users, PSU is not really needed to be such advanced."

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作者: Miipp    時間: 2012-5-23 00:10



師兄在錯誤地方發表鳥高見

樓主只係 Antec Neo Power 430, 諗住想 upgrade 上 i7 3770K /3770S + Z77 + 7750/7770....不是全時用高端硬件不關機 100% full load rendering

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作者: asvin    時間: 2012-5-23 00:18

回復 40# Miipp
其實我最初都係想回應某位CHING講既:
"完全明白, 原來依家D人動不動則用600, 800W的火牛是用來壯膽, 壯大List 聲勢啫."
證實一下貴牛都有佢真正既用途姐

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作者: avdaemon    時間: 2012-5-23 10:46



假定正常使用情況： 一日用8小時= 8/24， 回本期由原來2年變成2x3=六年。又大部分時間平均loading當是200W，即200W／400W=1／2，回本期再次延長由六年變成6x2=12年

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作者: Miipp    時間: 2012-5-23 23:11



消費講心癮, 廠就係捉心理生存, 個個消費者都計到咁盡, 大把廠都要執

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作者: 香港人2004    時間: 2012-5-24 09:34

我想問一個問題, 我尋晚出去買左新底板, ram, ssd, 舊野只係得牛同舊harddisk, 之後上機後, 開唔到機, 之後將牛線拆過再插返, 有電到, 開到機, 全部風扇有轉, 但冇畫面 no signal, 求高手幫手!!