標題: 3700x 降頻 [打印本頁]

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作者: aes090    時間: 2020-3-1 11:52     標題: 3700x 降頻

換左新機約1個月
平時待機溫度平均50-55度
打機 i.e. Warcraft III, Diablo III 等 溫度直上70-75度
室溫係23度左右情況下都上到最高75度, 如果到夏天30度以上真係唔敢想象
部機放枱底隻腳都感覺到陣陣熱氣

上網搵左一堆資料關於3700x 降頻, 以下其中2個:
https://www.pcdvd.com.tw/showthread.php?t=1165900
https://forum.gamer.com.tw/C.php?bsn=60030&snA=527515

實測得出結果
- 將CPU電壓由自動降到1.0v, 經過CPU壓力測試最高溫度由75度降到55度
- 效能損失約19%-23%
- 1.2v、1.1v同1.0v效能差異唔大

新手一問: 將3700x CPU電壓長期降到1.0v會唔會對CPU壽命有影響???

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作者: 1756    時間: 2020-3-1 14:06

提示: 作者被禁止或刪除 內容自動屏蔽

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作者: cnboy    時間: 2020-3-1 14:13

本帖最後由 cnboy 於 2020-3-1 14:25 編輯

換個好D散熱器仲好啦,再唔係用水冷
btw我都係3700X,百幾人仔淘咗個6 heatpipes 3 fans tower
風扇最低速,室溫24,idle=33,full<60
而家搵緊換埋靚風扇

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作者: Pppk    時間: 2020-3-1 14:32

本帖最後由 Pppk 於 2020-3-1 14:34 編輯

我都係用3700x，待機3x度，打機5X~6X左右，都係介意太熱就係散熱到著手~
其實粒U經常都係1.0xV，降乜鬼

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作者: tkc961127    時間: 2020-3-1 16:51

如果用3700X配Noctua NH-U12S夠唔夠呢?
U12A有D貴

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作者: aes090    時間: 2020-3-1 17:27

本帖最後由 aes090 於 2020-3-1 17:31 編輯



    老實講散熱最終d熱力去曬邊?
我就係唔想間房咁熱

講返粒u, 佢閒置係會跳上1.4X v, 直上4x-5x度
相反到高負載又會降到1.2x v

利申: 間房日頭唔開冷氣

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作者: nirokzhk    時間: 2020-3-1 18:10



最終都係去哂機箱外,唔想間房太熱,打開房門打開機箱側蓋直接用風扇吹吧

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作者: Mr.scy    時間: 2020-3-1 19:06


所以我都係放係枱吹出窗(用把CFM大啲嘅去抽出)
同埋用水冷個heatcapcity高啲，吹出嚟啲風溫度無咁高，熱力亦都會平均啲唔會集中喺一個點慢慢散出嚟(個人感覺，有錯指正)
不過打機張卡啲熱又係會散出嚟

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作者: aes090    時間: 2020-3-1 20:04




可能我用中階卡 打機GPU都係4x-5x度
用到依家平均低過50度 打左陣Warcraft III

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作者: kin021360    時間: 2020-3-1 20:08

熄PBO同Core Performance Boost
一係自己手動降電壓超

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作者: anonymoushk    時間: 2020-3-1 21:19

回覆 1# aes090


   
eco mode is your friend

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作者: aes090    時間: 2020-3-2 10:08




    how to do that? thanks!

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作者: anonymoushk    時間: 2020-3-2 16:37

本帖最後由 anonymoushk 於 2020-3-2 16:39 編輯

回覆 12# aes090


   
[url]https://www.techarp.com/computer/ryzen-eco-mode-guide/[/url]

enable PBO in bios , and you will see that in the ryzen master

or you can set cTDP limit in bios



https://www.youtube.com/watch?v=XkBq9zqJGJE
you still got decent boost clock for single thread , so the gaming performance should be fine


3700X in eco mode have less performance impact compare to 3900/3950x  
https://www.hardwaretimes.com/testing-eco-mode-on-the-amd-ryzen-3000-cpus-95-performance-for-70-power/

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作者: doslam    時間: 2020-3-2 19:22

我行4.2G 要1.3V 至穩

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作者: 樹下乘涼    時間: 2020-3-3 08:40

太高電同太低電都唔好...
兩者電路都處於極限狀態....

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作者: yick    時間: 2020-3-3 12:18

pbo off左先
電源管理用 window balance
cpu  min set  85%
fan  active
max cpu 100%

應該會涼到idle 40度以下

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作者: aes090    時間: 2020-3-3 23:29

本帖最後由 aes090 於 2020-3-3 23:32 編輯




Windows balance定Ryzen Balance好?

BIOS Setting
1. pbo off
-->關左pbo 等於fix clock rate? 定係令到超頻無咁進取?

2.
cpu  min set  85%
fan  active
max cpu 100%
呢度唔係好明
講緊CPU Fan 轉速??

3. CPU Vcore set 幾多好? 暫時1.0v

較左1v之後感覺部機反應係慢左，都想調返高d
暫時上hkepc & 開2個Virtubox 溫度平均42-43度

圖片附件: 1.png (2020-3-3 23:21, 33.29 KB) / 下載次數 140
https://h2.hkepc.com/forum/attachment.php?aid=2179258&k=32393c52434281a96a7a883376ff7034&t=1782682917&sid=3VkyzSYZgkG



圖片附件: 2.png (2020-3-3 23:27, 27.59 KB) / 下載次數 174
https://h2.hkepc.com/forum/attachment.php?aid=2179262&k=24612d4cabd9ac3109a130e2e6c34d3d&t=1782682917&sid=3VkyzSYZgkG

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作者: aes090    時間: 2020-3-3 23:35



I search for some websites. They say PBO is running at low efficiency
For overclocking, should close PBO & fix the clock rate

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作者: anonymoushk    時間: 2020-3-4 00:48

本帖最後由 anonymoushk 於 2020-3-4 00:50 編輯

回覆 18# aes090


   
no , enable PBO here is to make eco mode appear in the bios and ryzen master

PBO was Precision Boost Overdrive = it override the boost setting
in common way people adjust to higher limit to get higher clock, so it will consume more power

in eco mode it was override the stock setting and limit the power to less than stock
for example , a 3900x normally will get 105 TDP rating = about 140w PPT
3900x in eco mode you will get 65w tdp rating = about 88w PPT
which mean it will consume less because it reach 88w limit
but at the same time it still give you impressive single thread boost clock , you will get good boost until the 88w limit is reach

fix clock rate you may lose single core boost and idle power save
although you can find the sweet spot and it may have better power ratio than auto boosting
but the trade off are too much (especially you are on gaming or need single thread performance)

PBO is not for overclocking only , it can use as power saving and temperature control
you can set it to whatever you like , some people running their 2700x at 45w setting