The GT300/Fermi Thread - Part 2!

[saaya]

its downclocked quite a bit. 4870 idle was from that and terrible power gating. its ~3 watts per IC with gddr5 and there are 12 on the 480. thats 35 watts. tesla was delayed because they are waiting for hynix 2Gb IC's. even then with 6GB you are still consuming a lot of power.

hmmmmm
http://www.pcper.com/article.php?aid...=expert&pid=10

37W higher power consumption of 1gb gddr3 vs 1gb gddr5?
that CANT be caused by the memory chips alone... impossible...
there are only 4 memory chips on those cards, it would mean almost 10W per memory chip... MORE than gddr3... which would mean above 10W per memory chip! they would burn up in no time without a heatsink on them... normal mem chips have 1-2W tdp...

and lets say the imc runs much hotter if its driving gddr5 and the memory chips ONLY consume 5W each, then the memory chips would still burn up without a heatsink and the imc had to run over 15W hotter just by driving gddr5 instead of gddr3? and thats only a 128bit imc? that CANT be right... that gddr5 card must have a terribly unefficient design and they somehow fcked it up or used super cheap very unefficient components in the pwm...

i couldnt find any useful information on wikipedia or samsung or hynix sites regarding gddr5 power consumption... anybody?