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Title: AMD 7770 question Post by: feofhweufheuiwhfef on March 02, 2014, 01:30:16 AM I am looking to get an AMD 7770.
According to litecoin.info, these are the types of 7770s tested..... https://i.imgur.com/BsfXOmp.png first column is Mhs, 2nd is core clock, 3rd is memory clock... But when I look for this item on websites like scan.co.uk, I get the following (http://www.scan.co.uk/products/1gb-xfx-radeon-hd-7770-core-edition-4500mhz-gddr5-28nm-gpu-1000mhz-640-cores-dp-dl-dvi-i-hdmi) https://i.imgur.com/mscNiTP.png As you can see, memory clock is 4500 Mhz..... I don't get it.... Why is memory clock 4500 Mhz...?? All the ones on litecoin.info show between 1125 and 1425 memory clock... 4500 Mhz is vastly more..?? What is going on here.. Title: Re: AMD 7770 question Post by: DarthMuffin on March 02, 2014, 08:46:24 PM That's the "effective memory clock". It's a marketing gimmick. The actual clock is less but but it's a wide pathway. I don't know the exact specs on that card but probably something like a 32-bit processor and a 128-bit wide memory bus so 4x the bits are pushed through on each clock cycle.
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