Kabylake重裝再戰第八代，Intel i7-8550U評測
Kabylake重裝再戰第八代，Intel i7-8550U評測https://lh3.googleusercontent.com/H6fatZlm2rNhldnnX3wURWVyU31WQSZDnygXa5Di5KwwT7gZqOMM9sruUamrJ4x_z35sOkgPSKsMsvjGBrRP-xhNbgcOYXd9sf3VMOlTsC71xElA_9_Q2FnH4N96wFf6024n2pp6(圖片來源:wikichip CC-BY-SA)I.前言 2017年可說是近五年來硬體市場變動最大的一年，自3月起AMD發表一系列的Zen架構CPU，涵蓋了伺服器、桌面、筆電市場，而Intel也不得不好好處理這個"久違"的市場危機，僅僅只有4核心設計的消費級i7，低功耗版本更只有雙核心的設計，面對AMD CPU全面翻倍的帳面規格，Intel也不得不在8月時抓住AMD產品發表的空檔，發布了第八代Intel處理器，並由Kabylake Refresh的i7/i5 U系列打頭陣，核心配置翻倍，繼續佔領著AMD早已缺席許久的Ultrabook市場，而今天我們的重點就在Kabylake Refresh出來的i7-8550U。
II.老架構新配置，核心不夠就再加下去
https://lh6.googleusercontent.com/42_45YnpDLbW7Ucj6JYyyh6lMfmw_iOrnUoaQZZ_utb_wEpG13eAjwZUFtNMk3kqTMoPfSxYt2PS4QCxTrMKc8t3vwFtONrh8DBvdHWCmLQV3P44Ks8OuDGfGVrgLqlJidWPrEs4(圖片來源於: WikiChip CC-BY-SA)
I7-8550U雖然是第八代intel處理器，不過其硬體架構與第七代處理器實際而言相差無幾，對應第七代i7-7500U最大的差別僅在核心數目翻倍、各級Cache容量倍增，以及移除了intel TSX指令集(不過該指令集的應用相對較少，並且有漏洞傳出，一般使用者應該算是無感)，其餘規格都算是比較小的更動，內建顯示從HD 620更名為UHD 620也只是後者較前者擁有+50mhz的時脈提升而已，連腳位也可以沿用前代；雖然如此但是其核心的發表也是對市場投下了一個震撼彈，在此之前從未有如此高規格的CPU投入UltraBook市場，其帳面規格甚至超越先前世代標準電壓版本CPU的規格，雖說如此但是也受限於UltraBook平台功耗的限制，限制住了運作的時脈，本篇將實測擁有高規格的I7-8550U是否能在UltraBook闖出一片天，一改U版CPU效能不彰的刻板印象。 III.I7-8550U規格與環境設定https://lh3.googleusercontent.com/6UOrCGZtFd03vErtwcA2HVaGT7C0nMjrfliOpxgv3P9Ix4cvfDvnwG1jztxKVVcbe_j-ithTPXnF3xwPssA0GB_XZD1Z3Ocfw7p_LK8w0Dzq5dy_OmThfsLUskCuwuwmYqYx4fAE上圖為 I7-8550U的詳細規格，來源於CPU World本次的測試環境使用的是CJS 喜傑獅的Z530筆記型電腦，詳細配置如下:機型:CJS Z530CPU: I7-8550URAM:Micron 8G DDR4-2400 *2 GPU:Intel UHD 620SSD:WDC WDS250G1B0B-00AS40
https://lh5.googleusercontent.com/CABxV1oosOcH_4YI8KRpoahaG72duTpOoTMVRjHfhrWjsBdvQP5MPf3njyMxKZ-t-gFeFmgwERr1_MkD55kauuQMJAWvead2fpUUuPgAVfAXHcfxpheiPukIZeyG_yPTCv9a71Ip上圖為I7-8550U CPU-Z GPU-Z與工作管理員的相關資訊https://lh5.googleusercontent.com/zDnBrEx1Xd2SaA9SW9zW0ZQm2pivoLk0a6BCxS0FIm4DLeM4FnHU648Tcu6DhlPDhEauRj3SgCUmKI2mQWotdnXlaK0seqsNGN7qtJlPmxX_GPyBFQrQv3iqH8b60qiNVjo21MJBI7-8550U CPU-Z 自帶Benchmark 單核心432.2 多核心1663.5https://lh6.googleusercontent.com/ZeenSxx83ZcJsLNdXvX6H2cja_iyKLm82z7438K0lKS3ymjix5pavyHVeFrQNSynUa6AH3RpyjzoTsPTw7X3GNDUu7r7jSDgQiZVIldR6UG_U6b9cG4eZ4HOXuW-pqRSrfQUm8dx上圖為I7-8550U的AIDA CPUID資訊
IV.AIDA系列測試https://lh4.googleusercontent.com/nnjxAY56PuS9twXqKuSmrP7E3DzeBVWldVWADDVWzZGmlHiaUGZNs2R0TqhoKXzq7f-i4AJXyDNvmjreiCHhv9GShTRwn7juhaKcg2kC8YqeXCz6o5TZtcZSHGRKMI6oGpBsUkcZ
上圖為i7-8550U AIDA快取與記憶體頻寬測試記憶體讀取:32489MB/s記憶體寫入:34384MB/s記憶體複製:29804MB/s延遲:64.5nsL1快取讀取:692.16GB/s L1快取寫入:348.27GB/s L1快取複製:768.84GB/s 延遲:1.0nsL2快取讀取:283.12GB/s L2快取寫入:191.06GB/s L2快取複製:260.06GB/s 延遲:3.0nsL3快取讀取:177.95GB/s L3快取寫入:125.06GB/s L3快取複製:167.42GB/s 延遲:11.5ns
https://lh3.googleusercontent.com/Erg1VWrpGSpPkvtARHkd8Fmd5_vsGcxCyX6PpYdEIJI2tXgg3kVAycw8zEMiHw38Vk0L6smj0MPX3N-I9SLIiQ01ojxd7PLdckBqhGib_E_Dra2WBoeYrUurY5RaZdg0RJ3mojjW上圖為I7-8550U CPU與GPU的GPGPU測試
https://lh3.googleusercontent.com/n1gb93UqcKplrFUIDF1Dz2IEMyyshaV3c5U4Zjg8LH9WEimpZFEhrkXdjjcqXfUlTCpHl6EQlNXgliPdLYRZg2AQFBBPn3e7AWZAm0699U9EBkNJ1MAYryX7LyX9liCDhJtxSEZiI7-8550U AIDA記憶體讀取 :32558MB/shttps://lh3.googleusercontent.com/_uxH0PAL-ADwCw6Yc7xoNu9rMYYYKDgAOMa6RRPm-wQ3bg6ImKIU6BOyz0T13Bm8PkDHFaHRlu0qnFwtM-ixhEcJLTwoWckemfn9IQxNcty2uLY55hxiLh5OamIT_SjyuOIvtvB3 I7-8550U AIDA記憶體寫入 :34920MB/shttps://lh3.googleusercontent.com/EDZYTXe94ms9pXqA-pdYljtaOd3kACzuD7TTeErDxWI3RSjLhlKw34ZiEYpkfaLjWcfcUAYuWokC50DHeiik6-wrxkMfD1picyRA2CQZ-qXXsOGccPsXwr7baBqg0wGsjYbERafO I7-8550U AIDA 記憶體複製:30363MB/shttps://lh3.googleusercontent.com/oaoiZG6sqZdFL_jiz-W2EnUc7HKPEqgSKr0WuMbI-KHpQSij_PRjzZGNWMXjhszcPVVxDmq4Qk8yjY_MyILJmXGwWugUN4ZW5OHhSG1quJf76zWfdnfklRQACZvCQO6b7FWndEWm
I7-8550U CPU Queen 36599https://lh4.googleusercontent.com/qvqnflEyZK4-gUY4KuIHG1x2eYBakJXCK2AWTeXX6ON4_iOMo2f1G5SeV6WVX5qv6IVIfzIJ7xjCSpkEn-H9DVrMGwYHZ68bVFGJkhRwOA5q-dNGuxz5IcpjrGmwSAVT9wvWkX4z I7-8550U CPU PhotoWorxx :19619MPixel/shttps://lh4.googleusercontent.com/0Y-YLpw-IJ0jahJMqc9fIlTHbCWNAaC5tmM3U_u2L-_J9SILSgAy7D67T3I4LIU_iCnbfgOYE1BTt9FxwEv-cQ8X33lnZZ_udCeN_HveT3Wd8B5JVPPd3gI-sBZToQoUU8grogff
I7-8550U CPU ZLib :247.9MB/shttps://lh5.googleusercontent.com/MHjxFTvty1ZwsYRAKqUGD61fc7LcqW98D6-8XVVt11_uEdj_mMqI9CacjinFouaP24BUc5Xanb_HatdmOL1E59bUKKy_37-i8tm_cQZcN0cBGhf7g6gkk-oorgyceuhpdk4CwEV3 I7-8550U CPU AES:14081MB/shttps://lh6.googleusercontent.com/EjK4RRfnanYK1_4rocNjg4gx-7zG4l8GUNBHtwiu7fpS-XCriYbjyvXaFVFURbmAB9Zn8ZStBxOPZ184swPxsW9XZRed4Pq0fiU_uJj94IXWQBKK3pH4Q6zViyzJSiG1Ix26mZS0I7-8550U CPU Hash :2964MB/shttps://lh6.googleusercontent.com/GjZfgFWzhEC1vdtKEq30tIT4DN9Uy6cA5k4gKmy-76yupuFJf9ofQZyuu47FXS0onX3-NSeut86UcC4tWPBawoxC-GRDzUiZBl4le4IA1_GKRttjXxZ4PNvxAnd6UGfY6G4jy0DlI7-8550U FPU VP8 :5071https://lh5.googleusercontent.com/eo9nf6FjTDD5lx_1YjG9Uq4NkIRQFNXcrB2T6GGfXDeIojhkoslmmBPEsb-fwbQqmBsm4Y4Z1skw62CAALB8xQRdm9eKGd5Zf68rqmbi3vy7tUtP1RTQeB9DN_EQxYU1xid9mXJY I7-8550U FPU Julia :20573https://lh6.googleusercontent.com/bjRLxEvW63rlFa4WtfKzkv0smy0WB9KdACnUovzAYakvmwzI6P2zlwoDOFM58fzmVxQ-E9OH1QRtHn9f6m1BkVC7PP0VXo6r3ITqJrt_i2moSWGxk-lsHC2pExEcyv9Sesvd8Gle I7-8550U FPU Mandel :10165https://lh6.googleusercontent.com/X_fsE1udHKend5scQ3zqHKk0t1kgOm8OMCn-xc9Hraz3j6Qdo_Rvf0RBHawEmF9HS0AH4-2U7rAkQHaxDY4Wvc5E2dj-0ZZLQd74vQ8_nRfvXna-OgfaytEXB2uAMWa68yI0zwXA I7-8550U FPU SinJulia :3619https://lh5.googleusercontent.com/of5EKJmvmYNKanYvy20fAVjrpjDAh8EPuBjs5WvoXAEZqUzxJx-BMuXRQBZZ89uUX6qVaY9QN6n05YUdLBHmxgV3AXF1vbxWjbu-OPHCJIFHkeAy_Nlcdx41fgaIOSUi8KEJEnXYI7-8550U FP32 Ray-Trace : 3958KRay/shttps://lh3.googleusercontent.com/B4gMLIvGvjn2JXjxwh9unPMhtYHRcazD2o4HdlSmZFgWlnLMXxnwzMuRhDQfEJVsrUM05d4qby3CBDn8eOro4EOPTMk8u_8kRD3rcwjeaFHTy9RyjGvwAT20cWHXNFZjzmPtdxIWI7-8550U FP64 Ray-Trace :2149KRay/s
V.3DMark 系列測試https://lh6.googleusercontent.com/UFojIjfDspVF_swxwQKdsGpb1m4lbyCWdoGmWYKPytsZX6wSdKfVDhJaV_3fMD7zXxkLrJdUDXm1ys82XPZILI_UwIfmvyb1IQlTX1eCP8OhzTJdu0iEqgTNBs0I5RKJa1cIonX_I7-8550U 3DMARK11 : P1997詳細資料:https://www.3dmark.com/3dm11/12543170
https://lh6.googleusercontent.com/wwX-2CprWPjMBh0K75FNZJj_5Sh8c7d_bA3sXvN-jzN-PyPPmYRbcSu8VYVYNz4ddiuIeMt1bmUcuMO0bVHgVDk0odgbgl0zcU3-F8XNcMGx_3aRO79UDsi3pLb8Y1Kxae_jq2gSI7-8550U Timespy: 425詳細資料:https://www.3dmark.com/3dm/23909424
https://lh6.googleusercontent.com/dWGRgF53l0bL5iNXBD7JeXCINiGnyQFF0difvDuP_gfCRmfhh8IrKUfHKtVOMW8Cbh257rX07fLXq-GPxFkoiL6-Jkd6eEAQvE2I725EhV3dBIi3EV383Ld02Ry81T_sTBbsN9TYI7-8550U Fire Strike : 1146詳細資料:https://www.3dmark.com/3dm/23909523https://lh3.googleusercontent.com/uyKFtkm5qF8zGCq38nL0xztSJfSYhjzih4jHKpqw6psGC-CY1mOXm2Ep23ik9LAUi_E_HIwOaIBx5_ZLD0qo7NGVIBBRE6FWQ5OWxDW3ZT5S_BEz8gN3AfGTggSbFyBT_vcjNmh5I7-8550U Sky Driver : 4604詳細資料:https://www.3dmark.com/3dm/23909616https://lh5.googleusercontent.com/FMlrgfx-2GXz8SmGjhLuW2AzV-fSgiSYQz8URsZq5utehxDrADFcoo51R7OA1O_LVAAg6bHBUgSp957tYCOeAa3xIZSi5HZeasaSrgslrnVZZQhcVDlUaWvxmGtWh9fu2zvl1tTB I7-8550U Cloud Gate : 8674詳細資料:https://www.3dmark.com/3dm/23909689https://lh6.googleusercontent.com/BPoW1bI2l-zmkp74KpaOrNpxx6zNqg930eszv1agC0gOgaYwLxVq-4leq9hYqbNf8sslJrMuSSxkML1XMztFDwMGhp1H8iIPUtulXR_VwNMkidFJdiM7uyui5o3hXNCAdJyLHFKYI7-8550U Ice Storm Extreme : 52870詳細資料:https://www.3dmark.com/3dm/23909756https://lh5.googleusercontent.com/rKuwltHcHEFqrt3MExpjpV3Qgibu_X0rOgOIFFjIQm_bdYSTv2B5MiYggTk4GDKTgP9X0eL8zDvD3W_VhQq1JaONfNVhnBhoQzzr-qqrZyyF0LAiVxwQNxJI3_4VZPr0KKpNcxPGI7-8550U Ice Storm: 73357詳細資料:https://www.3dmark.com/3dm/23909836
https://lh3.googleusercontent.com/mVgf1-IsvQpdX0Du1PvqfkRmNhExZ3jFJNoULVfX3-ox7xAIQZwUFhxQPkgpr0an1BqQVLtACRwhXFFLCdSTWoiejGuoZ1zIERYF_Cc80tmqu5_qJiU0K0wtKItKoMJb6Q82VUop I7-8550U VRMARK Orange Room 測試 : 723詳細資料:https://www.3dmark.com/vrm/23909905
VI.PASSMARK 測試https://lh5.googleusercontent.com/BNugVmY_wIMua63GECvlbx2jxMQMAr1mjXK7xok44NkGSJ6Jgk1nQcNia6hWygbrp9UB5PkI-Xz1vmy_D3tKdTjlFzuXydUHj0rXDmuN5q_4z6b8KiuiT47xyKJ12Q9zPSTZGUXNZ530 PASSMARK 總測試成績 詳細資料:https://www.passmark.com/baselines/V9/display.php?id=93801903174I7-8550U CPU MARK : 9130 2D MARK : 680 3D MARK : 776 MEMORY MARK : 2970
VII. CineBench系列測試https://lh4.googleusercontent.com/Pjqr1RrQN5byzwI_3Zur3T_xcTLMAJhIuAi8DhU5T28vqe9WyO-QLzdB5Pr4dqp0Azg9YTdB0ONqM6Lde4I9IFqOupQw-jnQnBwQ17RhS0LQYIMtTuzqLG6LykVDI0m5t7fLeEYBI7-8550U CineBench R11.5 測試 : 6.25pts Single Core 1.94pts
https://lh6.googleusercontent.com/NR61b69JUd0-hT3jQZEufhXmsuWarM7bmorqbh-KoEOo3Jqwe0deoF4ZwXWZMTH-kE7H376ppiWxLb1v8JAyEp64wq_3FGNnJJvxquNT2YLv5KfyTEZ9CcJxYswd7adJuViFKtuCI7-8550U CineBench R15 測試 : 567cb Single Core:172cb
VIII. X264轉檔測試https://lh4.googleusercontent.com/_uaA-gnOLe21rggXeQ_qzvtK6NaBEnx4vRYCx661dpm3gJY9KRmg2CQXWV1rsNBL51JM07nXhRuACF_XzToq_r6CDcGQ3lGuTrjo4awmwpmIvMryZiDR3F0N_3vRLQOIkHNgPt3QI7-8550U X264 FHD BenchMark : 18.3
IX.LuxMark測試https://lh4.googleusercontent.com/l1FwUQxXm7IpBWgCzKhnBfLxOxnTMpToN5p0Uqoinm_Cnwb11Kogf4nA_07BqCyt08043hR1U0yWorabCX6LTCfU96IJKcmOF2WwbWvMGkHVzN1BLaRXyMGa4VED70mxWT3Rl_FvI7-8550U CPU-oniy:511https://lh4.googleusercontent.com/RsOa7kOTxyX_SVfdqGu2QuGzrUWUKheULogV6pjAn0DoLrpDQpVcKJvwK_HUBuwOKw7fUvTSY0byL5bgHQ3DcdungP0vdACDq8lmLG5ep1DlRP_7Erp8iwEcHYB8sSmtLR22PMXmI7-8550U GPU-only:661
https://lh4.googleusercontent.com/C61z626zzzEvkG-9dI5leQfaNGoUZr2XLO_81NC_WvR-PNCSRgYBQp2fvO3CpSY3MobCrUV8a0ct_Ws5yKZBIlTrd3apEUVu71kr8SLRVKItCyeliFKAW05ahgK5X5GU_WZmlMBLI7-8550U CPU+GPU:795
X.CPUMARK與國際象棋測試https://lh4.googleusercontent.com/ttlF2KYhdZ7GvI6qRhDmhg3HJdlIoAcDaUCyuFuXKGw5mNsJC8tbkEiOb4Db-bIgVi7poxTX6PbZsj48Kbn2V2yQgWtF9EGsgaLVXvNWKk7Cxwh4sFeM6bPnhvoIvvsBb2KlMs_cI7-8550U CPUMARK:715https://lh3.googleusercontent.com/5kR9Nr3F6PVwRtLENPDU_OqZEepMc0m3djtJwQYqfc4xSVHbDFY0MPdeI05OSFv-AjKyR1Nd3yoZ5DSq_Ztoll23I4ECTtt9nSyWnw3js5eUonQ0o8AuMBCv8YQgUZmn0DdSj1hQI7-8550U 國際象棋:10702
XI.7z壓縮效能測試https://lh3.googleusercontent.com/Nqii96AfyLmfa1glL1rMjl4cQfN06Y8m3J5KffLlcrcVFnP0xReN0v9Yz95XH9XlInz-cn1vqU_ebblWeqXAtGZec2miuPp2H60ZfZ53hYDW4QBCK0Xq4SbMQL-oDcU1dYFo4OI3I7-8550U 壓縮效能測試:18256MIPS XII.小結-多工更有優勢，力拼桌面級CPU這次I7-8550U的核心數量翻倍，就連L3 Cache也向桌面級看齊，以同樣的價格能夠獲得這樣的升級，確實是物超所值；不過實測下來也知道雖然規格擴增不少，與標準電壓或是桌面版的處理器仍然有一段的差距，問題主要是在為了顧及功耗，而必須要做的頻率降低，I7-8550U的額定頻率僅為1.8Ghz，在目前的消費級處理器而言算是偏低，不過單核的Turbo頻率能到4Ghz，在做單核測試時也常常可以看到4Ghz的出現，整體而言，效能約莫落在四代的標準電壓I7左右，能將這樣的CPU效能做在UltraBook處理器上，算是前所未有的創舉；整體而言對於一般文書應用的用戶，我會相當推薦I7-8550U打造出來的筆電，相差不多的價格能夠帶來不小的效能成長。當然也有不推薦的地方，I7-8550U的功耗配置雖然與I7-7500U皆為15瓦配置，但是I7-8550U的實際功耗是餘I7-7500U的，實際續航力可能較7500U而言偏低一些，並且8550U在四核全速運行時，頻率僅1.8~2.2Ghz，在單/雙核運行時才有可能運行在3Ghz以上，因此對於一些高時脈需求的應用而言，7500U的表現可能會比8550U還要高；另外文中首段有提到第八代U版處理器與第七代U版處理器腳位都是相容的，所以有許多廠商會直接將7500U的機器直接改成安裝8550U，雖然不是不行但是8550U的散熱需求是較7500U還要高，所以倘若該廠商的散熱設計原先就較為吃緊的話，再安裝上8550U可能會使其效能有大量的降低，因此8550U機型的挑選也是相當重要。這次Intel使用KabyLake Refresh來更新筆電處理器，或許整體看起來成效不差，豪華的規格的確帶來不少的效能增長，不過整體而言也略顯倉促，內建的顯示晶片更是只有名稱多了一個"U"以及透過調高頻率來做出一點點的區隔，這樣的策略或許在桌面版可行，但是在能源、散熱捉襟見肘的筆電上是否是個好做法，就待市場給予我們答案吧。
By Allen Wang以上為筆者個人意見分享，如果有誤歡迎交流討論
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