Radeon HD 5450是ATI HD5000系列的最低階入門卡，雖然低階但也支援目前最新的DirectX 11以及ATI Eyefinity多顯示技術。
就官方的資料，HD5450的核心時脈為650MHz，記憶體時脈為800MHz，會有DDR3及DDR2兩種版本，就目前已經偷跑的幾家來看，記憶體容量有512MB及1GB兩款。待機功耗為6.5W，最高耗電量為19.1W，官方售價在49~59美金之間。 
ATI Radeon HD 5450 規格表 
拿到的公版卡散熱器跟上圖不太一樣，個人覺得靜音版比較帥氣一點，這公版卡看起來就有點陽春。
最後大家期待它的效能吧!
使用3DMARK2006測試完畢後~
SM2.0--->1164
SM3.0--->1446
主打低功耗~且入門卡等級擁有這種效能
筆者相信面對於台灣瞬息萬變的網路遊戲環境而言
要應付起來算是小菜一碟~
更不用說簡單的影片硬解以及文書處理啦~~喝喝
(迷之音:關文書處理啥屁事啊QQ)
首先是專打入門市場的HD5450搶先登場
這款HD5450不僅同樣強調支援DX 11
ATI Eyefinity
ATI Stream技術
最重的是，它的耗電量僅僅只有6.5W~19.1W之間
(比4670 and 5570 9W~47W更低)
因為HD5450主打是的入門市場
規格上擁有80個流處理器
GPU時脈為650MHz
記憶體則有DDR2和DDR3兩種版本
而記憶體容量會有512MB和1GB兩種選擇
至於在記憶體介面則為64bit。
且不支援CF交火~因為根本沒有橋接器金手指部份
這部份其實5670就已經有點伏筆!
由於5670也有分成 512mb & 1G
且只有5670 1G版本有CF交火功能
(可能512MB版的交火候也沒太大效能吧!!)
基本上價格是落在49~59塊美金
大約折合台幣是在1,600~1,900元之間，價格是非常的親民。
5450 被 ATI 定位在 5系列的低階卡，既然是低階卡效能自然不會是本卡的重點2 Z+ A- D( S$ R! s4 E
偶爾拿來打打魔獸 o r跑跑卡丁車之類的小遊戲應該都還ｏｋ2 k' ~4 K8 o# f- U
但這類的低階卡其實還有別的用途，應該說是這類卡的主要功能-----高解析度影片解碼! { H" t) | Y
他完全支援 VC-1、H.264、MPEG2 等全部的HD影片解碼，這種特異功能還不是人人都有呢！！
繼2009年推出的ATI Radeon HD 5970、5870、
5850、5770、5750後，AMD繼續推出更多5000系
列的繪圖卡。
ATI Radeon HD5000系列
進軍筆記型電腦平臺
首先，是在今年1月的CES 2010大展中，宣布將
發表ATI Mobility Radeon 5000系列。而且，ATI
Mobility Radeon HD 5400以
上的產品，除了支援DirectX
11，也將完整支援OpenCL。
對整個業界來說，這樣的產
品是一大創舉，因為它們是第
一批， 也是目前唯一支援
DirectX 11中DirectCompute
11的筆電繪圖環境，因此能讓
微軟最新的作業系統Windows
7，發揮強大的圖形處理能力。
AMD在CES也同時發表ATI Mobility Radeon
HD 5870的繪圖晶片，它具有目前全世界筆記型電
腦最強大的繪圖效能。
基於與5800系列相同的繪圖處理技術，
提供更多選擇
隨後，同樣在1月份發表的ATI Radeon HD 5670
繪圖卡，同樣支援DirectX 11、ATI Eyefinity與ATI
S t r e a m 。此外， 它的運算效能高達6 2 0
GigaFLOPS，並且搭配GDDR5的高速記憶體。
由於ATI Radeon HD 5670支援的ATI Eyefinity 技
術，可同時驅動三臺螢幕的全景顯示，因此能帶來
最具臨場感的遊戲經驗，而產品‚ª˘低於100美元。
在2月份，AMD接著發表了ATI Radeon HD
5450。這張繪圖卡具有和ATI Radeon HD 5800系
列相同的繪圖技術，例如支援DirectX 11、ATI
Eyefinity與ATI Stream，而且搭配512MB的記憶體
規格，售價不到60美元。
ATI Radeon HD 5450的其他特色，還包括：耗
電量超低，一般狀態時為19.1瓦，待機時僅需6.4
瓦；透過認證的硬體合作夥伴，可搭配低噪音、單
片風扇設計的被動式冷卻系統，降低電腦產生的噪
音；它也內建高品質、高解析度的HD audio聲音
處理控制器，支援的HDMI 1.3a技術，可用單條訊
號線達到7.1聲道的環場音效，輸出的音質，也符合
AC-3、AAC、杜比TrueHD和DTS-HD Master
Audio規格。整體而言，它所帶來的影音體驗與所
提供的超高顯示效能與靜音，很適合應用在家庭劇
院環境的建置，而且價格也低廉，性價比很高。
5450發表後，AMD又緊接著推出ATI Radeon
HD 5570繪圖卡，以短版的產品設計，主打小型電
腦的用途。而且，在執行多款遊戲時，它的效能，
足足超越其他廠商的同級產品60％以上。
以目前的小體積電腦來說，能夠搭配的短版設計
顯示卡，款式數量相當有限，不利於使用者採購或
升級相關尺寸的電腦，而ATI Radeon HD 5570的
問世，讓對於小型電腦有需求的消費者，也能以經
濟實惠的價格買到高性能的產品。
到了2月底，AMD發表了ATI Radeon HD 5830
繪圖卡，它是ATI Radeon HD 5800系列中售價最
低的，250美元不到就可以購得。
Introduction:
Since the release of the ATI 5-series graphics cards, ATI has maintained a strong presence in the mid-range and high-end markets, but without an entry-level offering there has been a rather large gap in their current line-up. To fill this gap and expand the series, ATI is releasing the HD 5450, which will replace current cards on the market such as the ATI HD 4350 and HD 4550 as their 'de facto' mainstream entry. The HD 5450 comes with specifications that seem similar to the older HD 4550 graphics cards, but will come with features that were introduced with the 5-series, such as DX 11 and be manufactured on a 40nm die. With the reduction in die size from the older cores the HD 5450 can get by with only 20 watts of required power at full load, which should decrease the overall operating temperature of the card. Add to this the low profile design, passive cooling and exceptional HD playback thanks to ATI Avivo™ Technology, all make the HD 5450 look like a really nice option for a HTPC. Also, with the use of ATI Stream technology the graphics card can now split part of the load from tasks such as photo and video editing as well as HD playback. Though part of ATI's new graphics card line, the HD 5450 should not be thought of as a gaming graphics card, but rather a capable replacement for on-board video or older entry-level graphics that just can't quite get the job done with today's demanding applications.
The HD 5450 that we are going to be looking at comes to us from Sapphire and is one of ten models that are going to be release with the HD 5450 title. This card is one of the models in the series that includes 512MB DDR3 memory and comes with a Display port with Eyefinity support. The others versions will be available as either 512MB or 1GB models, using DDR2 or DDR3 with a 64-bit memory interface. There will, however, be one model that comes standard with faster GDDR5 memory and this will be the other model that will support ATI's Eyefinity technology. Even though ATI Eyefinity Technology is only supported by two of the models being introduced, it is nice to see this technology and others, such as DX 11, start to hit a more mainstream audience.
Closer Look:
The packaging the HD 5450 comes in a box that is black and copper in color and has an image of Sapphire's video vixen Ruby on the front! Below Ruby, Sapphire has listed the capabilities of the HD 5450 such as ATI Eyefinity, on-board Display port and DVI, CrossFireX™ and the size of the die. The front of the box also has the memory size and type listed near the top with the graphics card name below it. The reverse side the box has listed features and specifications that the card offers, as well as a run down of how they are beneficial.
The packaging we looked at previously is just an outer shell that houses the protective cardboard casing inside of it. This protective inner cardboard box is where the graphics card and accessories that come with it are found. The inner packaging has liner inside of it that holds the HD 5450 and the accessory securely in place.
I was surprised to see the included accessories that came with the Sapphire HD 5450 only consisted of the manual, driver CD, SimHD disc and two low profile bracket converters. Sapphire usually includes as much as they can when it comes to accessories, but even without all the extra connectors, there should be enough here to get you going.
Reference:
http://www.overclockersclub.com/reviews/sapphire_radeon_hd5450_512mb/3.htm
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