7800GTX 512MB hard to find? i can go out right NOW, drive 5 minutes to a local computer store, and come back less $1000cdn with a brand new spanking ASUS 7800GTX 512MB... and i live in Canada btw lol
There's 1GHz GDDR3 parts, but they're not in mass production. I would guess that GDDR3 will be able to hit around 1.1-1.2 GHz but it may not be worth the effort (lousy yields, high power consumption, etc) to mass produce them.
When they say 1.25GHz GDDR4, do they mean 625MHz "double-pumped GDDR3"? I'm a little confused by which of these RAM types have 1x 2x and 4x the standard bandwidth. Can anyone here explain? And what will the latencies be like comparatively?
To my understanding, the frequencies mentioned here are the base clocks, which means that their effective frequency is twice that (it is DDR - Double Data Rate).
How much actual bandwidth you have at the end of the day also depends on the width of the data path of course - 32 bit per chip in this case.
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ShadowVlican - Thursday, December 22, 2005 - link
7800GTX 512MB hard to find? i can go out right NOW, drive 5 minutes to a local computer store, and come back less $1000cdn with a brand new spanking ASUS 7800GTX 512MB... and i live in Canada btw lolViRGE - Friday, December 23, 2005 - link
Then you're fortunate. AnandTech's RTPE shows that the 512 is http://labs.anandtech.com/search.php?q=GTX+512">out of stock everywhere, as it has been for weeks.mat128 - Saturday, December 24, 2005 - link
A major supplier in Canada reported an available quantity of 22 as of dec. 22 2005 for the 7800GTX/2DHTV/512M (that's the asus one).Enjoy =)
DSson - Saturday, August 22, 2020 - link
Amazing facts. Thanks for sharing. <a href="<a href="https://appliancerepaircalgarypros.com/">a...bobsmith1492 - Thursday, December 22, 2005 - link
"ram"ifications.... very punny. :PRyan Smith - Friday, December 23, 2005 - link
It wasn't intentional, I swear. It just happened.stephenbrooks - Thursday, December 22, 2005 - link
The first thing that fell out of Googlehttp://www.xbitlabs.com/news/memory/display/200405...">http://www.xbitlabs.com/news/memory/display/200405...
seems to imply that there's no additional "redoubling" of the data - it's still a sort of DDR (and not QDR or anything like that), just with some tweaks to let it hit in the region of 1.4GHz.
Brian23 - Thursday, December 22, 2005 - link
So then what is it about GDDR4 that lets it get up to 1.25GHz when GDDR3 is stuck at 900ish MHz?Furen - Thursday, December 22, 2005 - link
There's 1GHz GDDR3 parts, but they're not in mass production. I would guess that GDDR3 will be able to hit around 1.1-1.2 GHz but it may not be worth the effort (lousy yields, high power consumption, etc) to mass produce them.stephenbrooks - Thursday, December 22, 2005 - link
When they say 1.25GHz GDDR4, do they mean 625MHz "double-pumped GDDR3"? I'm a little confused by which of these RAM types have 1x 2x and 4x the standard bandwidth. Can anyone here explain? And what will the latencies be like comparatively?Anton74 - Thursday, December 22, 2005 - link
To my understanding, the frequencies mentioned here are the base clocks, which means that their effective frequency is twice that (it is DDR - Double Data Rate).How much actual bandwidth you have at the end of the day also depends on the width of the data path of course - 32 bit per chip in this case.
phaxmohdem - Thursday, December 22, 2005 - link
Yep 900MHz GDDR3 will run at an effective 1800MHz, as seen in the GTX 512.