[情報] AMD Radeon HD8870/8850 規格曝光
[link] http://www.xfastest.com/thread-84324-1-1.html
HD 8800 將採用 Oland 核心,擁有 34 億個電晶體
比現在 HD 7800 系列 Pitcairn 核心的 28 億個多出 21%
由於還是採用 TSMC 的 28nm 工藝製作,所以核心面積會比 Pitcairn 大不少
推測 Oland 的核心面積將會在 270~280mm^2 之間
距相關消息指出,Radeon HD 8870 的性能將堪比 GTX 680,比 GTX 660 Ti 快 30% 以上
核心頻率 1050MHz,可 Boost 至 1100MHz,而記憶體頻寬則為 192GB/s
推測通道寬度為 256bit,而頻率將會運行在 6GHz
比較讓人驚訝的是這個 HD 8870 的 TDP 居然比 HD 7870 還要低,TDP 僅為 160W
HD 8850 則會擁有與GTX 670相近的,核心頻率 925MHz,可 Boost 至 975MHz
記憶體頻寬上和 HD 8870 一致,TDP 與 HD 7850一樣都是 130W
可以看出海島家族的能源利用率更加高,性能功耗比更為突出,紋理單元也進行了改進
雖然並不是很確定,不過消息來源稱這兩卡的流處理器可能分別是 1792 和 1536
預計發佈時間會在 2013 年一月,售價上 HD 8870 為 279 美元,HD 8850 為 199 美元
比 HD 7870/7850 的發佈售價要低不少
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