GDDR2與DDR是一樣的東西嗎？
 

小弟有一張技嘉的9550 AGP顯卡，規格寫：內建 256MB GDDR2 顯示記憶體
但我用GPU-Z看，Memory Type是顯示DDR


請問這樣是對的嗎？

GDDR2與DDR2是一樣的東西嗎？
GDDR3與DDR3是一樣的東西嗎？

我也很想知道~

GDDR 的G 是指 graphic 繪圖記憶體 ... 所以 GDDR = DDR
DDR 和 DDR2 最大差別不同在於使用電壓不同...其他運作的時脈和封裝方式來看比較不準..
況且~ 探討這個似乎好像沒有意義...

問一下wiki......

The first commercial product to claim using the "DDR2" technology was the NVIDIA GeForce FX 5800 graphics card. However, it is important to note that this GDDR-2 memory used on graphics cards is not DDR2 per se, but rather an early midpoint between DDR and DDR2 technologies. Using "DDR2" to refer to GDDR-2 is a colloquial misnomer. In particular, the performance-enhancing doubling of the I/O clock rate is missing. It had severe overheating issues due to the nominal DDR voltages. ATI has since designed the GDDR technology further into GDDR3, which is more true to the DDR2 specifications, though with several additions suited for graphics cards.

GDDR3 is now commonly used in modern video cards, Graphics cards and some tablet PCs. However, further confusion has been added to the mix with the appearance of budget and mid-range graphics cards which claim to use "DDR2". These cards actually use standard DDR2 chips designed for use as main system memory. These chips cannot achieve the clock speeds that GDDR3 can but are inexpensive enough to be used as memory on mid-range cards.

so....GDDR3比較接近我們主記憶體的DDR2... :rolleyes:

看一下顯示卡...GDDR3真實時脈應該是*2沒錯...

軟體誤判機率很大 拍一張記憶體的圖片來看一下較真實啦

謝謝，剛剛查了一下記憶體的編號，是DDR2

一樣試9550預設值差真多

http://www.compotech.com.tw/article...p?cid=5&id=8222

GDDR2電壓是2.5v? GDDR3電壓是1.8v?

因為早期9600跟9550卡幾乎設計類似(只差gpu時脈)

所以後期有不少超頻至9600的超頻9550卡

像是msi的洛克人9550,精星更是推出各種版本9550卡

這個問題我來回答應該是剛好吧,
坦白說,
差不多.....
GDDR2也可以拿來打成模組,
我不用錢的MODULE都是這樣來的......