heggs
Spamalamadingdong
+581|6658|New York
Reading through Tom's hardware, I ran into an interesting paradox. Now I understand how DDR and DDR2 memory clocks work for memory (200 mhz speed for ddr2 translates into 800 mhz overall speed in CPU Z), but looking at a GPU Z screenshot and seeing the accompanying text is really throwing me off.

On the GPU Z screen they have 700 mhz as the clock speed for the memory, but they call out a memory speed of 1666 mhz for the memory in the text of the article. How do they come about with these differences in numbers? Is there some odd multiple that I don't know about?

Link: http://www.tomshardware.com/reviews/pci … 915-7.html

Any help would be greatly appreciated, because I'm stumped.
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DUnlimited
got any popo lolo intersting?
+1,160|6733|cuntshitlake

Must be a typo
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Sydney
2λчиэλ
+783|7113|Reykjavík, Iceland.
And 200 MHz DDR2 is 400MHz effective, not 800MHz.
Brasso
member
+1,549|6900

I'll take a stab at it, although honestly, I'm not sure.

Wikipedia wrote:

To improve bandwidth, GDDR3 memory transfers 4 bits of data per pin in 2 clock cycles.
I'm guessing that means it is x4, instead of x2 like GDDR2.  So 700MHz / 4 = 175 MHz.
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aimless
Member
+166|6395|Texas

heggs wrote:

(200 mhz speed for ddr2 translates into 800 mhz overall speed in CPU Z)
Should say (400 mhz speed for ddr2 translates into 800 mhz overall speed in CPU Z).
Sydney
2λчиэλ
+783|7113|Reykjavík, Iceland.

aimless wrote:

heggs wrote:

(200 mhz speed for ddr2 translates into 800 mhz overall speed in CPU Z)
Should say (400 mhz speed for ddr2 translates into 800 mhz overall speed in CPU Z).

Sydney wrote:

And 200 MHz DDR2 is 400MHz effective, not 800MHz.

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