[XF] 免DP即可Eyefinity多螢幕 Sapphire藍寶 FleX HD 7870 GHz Edition 顯示卡評測
AMD早在2009年推出Radeon 5000系列GPU時就導入可橫跨3螢幕進行遊戲的的Eyefinity技術，但要構成可運行Eyefinity模式有一個絕對必要的條件就是：必須至少有一個螢幕訊號是由DisplayPort輸出。但支援DisplayPort訊號的螢幕通常都不便宜，想要透過轉接的方式也必須動用主動式的轉接器，要價也不低。
AMD專業顯示卡大廠Sapphire藍寶看到了消費者的苦惱，因此推出FleX系列的顯示卡，強調不需要連接DisplayPort也可輕鬆達成3螢幕的Eyefinity模式，而這次要為大家介紹的是中高階的FleX HD 7870 GHz Edition顯示卡。
p包裝與配件
外盒正面同樣是以女大兵作為視覺主題，右側標示顯示記憶體為2GB GDDR5
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/01.jpg
FleX特別標示
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/02.jpg
背面有特色說明
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/03.jpg
配件有2條單大4 pin轉PCI-E 6 pin電源轉接線、DV-I轉D-Sub轉接頭、HDMI轉DVI轉接線和HDMI訊號線
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/04.jpg
驅動軟體光碟與說明書
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/05.jpg
p外觀與散熱
本體正面
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/06.jpg
FleX也是採用雙風扇的Dual-X散熱器
視訊輸出介面有DisplayPort 1.2、HDMI1.4a、DVI-I DL和DVI-D SL各1組
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/07.jpg
顯示卡頂部可見2組PCI-E 6 pin電源輸入端子
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/08.jpg
卸下散熱器
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/10.jpg
散熱器與GPU接觸面為銅底材質，搭配4根熱導管與綿密的鋁鰭迅速散熱
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/11.jpg
風扇使用4 pin PWM溫控設計
外側兩根熱導管直徑達8mm
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/12.jpg
另外還有連成一氣的記憶體+MOSFET散熱片，具有簡單的PCB防彎功效
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/13.jpg
散熱片的絕緣保護措施也做得不錯
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/21.jpg
p用料細節
藍色的PCB
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/14.jpg
Radeon HD 7870 GPU，Pitcairn XT晶片本體
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/15.jpg
顯示記憶體採用Elpida W2032BBBG 2Gb GDDR5顆粒，共8顆構成2GB的容量
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/16.jpg
視訊接頭內部設有金屬遮罩，降低訊號干擾
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/17.jpg
擁有1組CrossFireX橋接頭，可雙卡串接
GPU使用6相供電
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/19.jpg
顯示記憶體獨立使用2相供電，照片下方可見BIOS切換器
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/18.jpg
FleX的精髓，利用Analogix ANX9830C晶片達成免DP的Eyefinity
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/22.jpg
p性能實測
測試平台與環境
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/20.jpg
CPU: Intel Core i7-3770X @ 4.8GHz
Cooler: Antec KÜHLER H2O 920 改2D冷排
Thermal Compound: Antec Formula 7
MB: ASUS ROG Maximus V Gene
RAM: Corsair Vengeance DDR3-1866 4GB*4 @ 2400 MHz 10-12-12-30-2T
Graphic: Sapphire FleX HD 7870 GHz Edition
Storage: Adata XPG SX900 SSD 128GB
PSU: Antec HCP-1200W
Chassis: Lubic Open Paltform 3
Monitor: Dell U2410
OS: Windows 7 64 Bit
室溫27ﾟC，相對濕度60%
3DMark06 (DirectX 9)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/3DMark06.png
3DMark Vantage Performance (DirectX 10)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/3DMarkVantageP.png
3DMark Vantage Extreme (DirectX 10)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/3DMarkVantageX.png
3DMark11 Performance (DirectX 11)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/3DMark11P.png
3DMark11 Extreme (DirectX 11)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/3DMark11X.png
快打旋風 4 (DirectX 9, 1920x1200, 16xQ CSAA, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/StreetFighterIV.png
快打旋風 X 鐵拳 (DirectX 9, 1920x1200, 16xQ CSAA, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/SFTK.png
太空戰士 XIV (DirectX 10, 1920x1080, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/FFXIV.png
惡靈古堡 5 (DirectX 10, 1920x1200, 8x MSAA, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/RE5.png
越野精英賽:大地長征 3 (DirectX 11, 1920x1200, 8x MSAA, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/DiRT3.png
F1 2011 (DirectX 11, 1920x1200, 8x MSAA, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/F1-2011.png
失落的星球 2 (DirectX 11, 1920x1200, 8x MSAA, 特效全開)
https://picx.xfastest.com/elvis/Graphic/Sapphire/FleX-HD7870/LP2.png
p功耗與溫度表現
測試平台與成績引用自XF顯示卡比較平台
CPU: Intel Core i7-2600K OC @ 4.8GHz
Cooler: CoolerMaster V6-GT
Thermal Compound: Antec Formula 7
MB: ASRock Fatal1ty P67 Professional
Memory: Kingston HyperX T1 DDR3 @ 1600MHz 8-8-8-24
Power Supply: Antec SG1200W
Chassis: Lani-Li PC-P50R
https://pic.xfastest.com/elvis/XF-VGA/XF-VGA-Bench-01.jpg
使用FurMark 1.10.1 燒機5分鐘
整機最大耗電量來到306W
https://pic.xfastest.com/XF-VGA/X00116-07.jpg
GPU最高溫度來到84ﾟC
https://pic.xfastest.com/XF-VGA/X00116-06.jpg
p小結
Sapphire FleX系列顯示卡的出現可以說是許多遊戲玩家的福音，不用再多花錢購買DiplayPort螢幕或是主動式轉接器了。
這張 HD 7870 GHz Edition顯卡雖然出場預設時脈只有超頻到1000MHz，但配上一般HD7870少有的BIOS切換器，還可將GPU時脈提升至1050MHz，整體性能來說絕對足夠應付市面上大部分的遊戲將特效開到最大來運行。
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