How Much Faster Is USB-C 3.1 vs 2.0 in Android Phones?
Jun 19, 2024 pm 12:22 PM從 USB-C 2.0 到 USB 3.2 的跳躍看似很小,但實際上,它們在 Android 設(shè)備之間的數(shù)據(jù)傳輸方面有著天壤之別。這種差異很容易被忽視——USB-C 標準可以幫助您做出更明智的購買,尤其是當您在兩個類似的選擇之間徘徊時。
USB-C 3.2 與 USB-C 2.0
所有 USB-C 端口可能看起來都很相似,但它們的作用并不相同。如果拆下任何 USB-C 連接器,您將看到 24 個導(dǎo)電引腳。并非所有這些引腳都是活動鏈路(用于供電或數(shù)據(jù)傳輸),但 USB-C 2.0 的活動引腳少于 USB-C 3.2。更活躍的鏈接意味著更快的數(shù)據(jù)傳輸?shù)念~外積分。
得益于這些額外的鏈接,USB-C 3.2 可以提供高達 20Gbps 的數(shù)據(jù)傳輸速度,而 USB-C 2.0 的數(shù)據(jù)傳輸速度僅為 480Mbps。 USB-C 3.2 技術(shù)于 2017 年 9 月推出,取代了 USB 3.1 標準。您可以在大多數(shù)優(yōu)質(zhì) Android 手機和平板電腦中找到它。另一方面,經(jīng)濟型和中端設(shè)備仍然停留在 USB-C 2.0 上。
正如我將通過測試演示的那樣,如果您經(jīng)常移動數(shù)據(jù),USB-C 3.2 是必備的。始終值得關(guān)注手機或平板電腦的 USB 規(guī)格。有時,即使是高級型號也不使用最新的 USB-C 標準??梢哉f USB 會變得很復(fù)雜。
測試設(shè)置
理論上,USB-C 3.2 的速度至少比 2.0 快 10 倍。在現(xiàn)實環(huán)境中測試這些速度似乎很簡單。只需將測試文件傳輸?shù)皆O(shè)備或從設(shè)備傳輸測試文件,并記下所用的時間。
但為了使測試可靠,我需要確保沒有存儲瓶頸阻礙傳輸。我使用兩臺 Android 設(shè)備和一個便攜式三星硬盤來進行測試設(shè)置。以下是每個的規(guī)格。
- 三星 Galaxy Tab S7:USB-C 3.2 和 UFS 3.1
- Infinix Zero X Neo:USB-C 2.0 和 UFS 2.1
- 三星 SM 841 便攜式 SSD :讀寫速度高達 500Mbps
我使用 Play 商店提供的跨平臺磁盤測試應(yīng)用程序在兩臺 Android 設(shè)備上運行了內(nèi)部存儲速度測試。存儲測試為我提供了手機和平板電腦的最大內(nèi)部讀寫速度。它們的內(nèi)部速度分別達到近 2Gbps 和 7Gbps。

即使兩種設(shè)備運行不同的 UFS 標準,只要數(shù)據(jù)傳輸速率遠低于最大內(nèi)部存儲速度,就不會有瓶頸。我還使用相同的 USB 電纜進行兩次傳輸。
運行測試
一切設(shè)置完畢后,就可以運行實際測試了。首先,我將一個 5GB 的測試文件從外部驅(qū)動器傳輸?shù)?Android 手機。平均速度保持在 350Mbps 以下,通過 USB-C 2.0 傳輸需要近 120 秒才能完成。

然后,我將外部驅(qū)動器連接到我的平板電腦,并將相同的文件復(fù)制到平板電腦的內(nèi)部存儲中。使用 USB-C 3.2,傳輸僅需 25 秒左右即可完成。傳輸速率徘徊在1.2Gbps左右。

兩種速度都遠低于瓶頸閾值。
現(xiàn)在讓我們嘗試將相同的文件發(fā)送回外部驅(qū)動器。我從Infinix手機上復(fù)制了5GB文件,花了1分40秒。其平均速度為 360Mbps,與第一次 USB-C 2.0 測試大致相同。

接下來,我將相同的測試文件從平板電腦發(fā)送到外部驅(qū)動器。速度為 2.1Gbps,傳輸時間約為 15 秒。

傳輸速率再次遠低于既定參數(shù),因此兩個設(shè)備都沒有遇到瓶頸。
解釋結(jié)果
不出所料,USB-C 3.2 遠遠勝過 USB-C 2.0。當我從外部驅(qū)動器發(fā)送文件時,USB-C 3.2 平板電腦幾乎比 2.0 手機快四倍。在第二次測試中,性能差異更加顯著——USB-C 2.0 甚至無法接近。 USB-C 3.2 比 USB-C 2.0 快 20 倍!
Even on the surface, the contrast is stark. It adds up if you move large files back and forth often, say, for photo or video editing. If you ever have to migrate everything to another device, an Android with USB-C 3.2 will give you faster backup and restore operations. Besides data transfer, playback from your external media should be smoother thanks to the faster read speeds.
Buying the Right Android Device
Manufacturers often release premium phones alongside a “l(fā)ight” version. You’ll typically find USB-C 3.2 and USB-C 2.0 in these pairs. Take the OnePlus 12 and its sibling, the OnePlus 12R, for example. OnePlus doesn’t advertise it, and it’s easy to miss on the specification chart, but the OnePlus 12 has 3.2, and the OnePlus 12R variant comes with USB-C 2.0.
Mid-range and entry-level Androids typically feature USB-C 2.0. A good way to find USB-C 3.2 on the cheap is older flagships from as far back as 2017. These older flagship phones often fall into the same price range as newer mid-range phones. So if you’re considering an old flagship Android, USB-C 3.2 is yet another perk you get.
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