[Manuel Calavera]

Autor xnautix

A sto je najbolje, prema svim HBM slideware hype koji je plasiran od strane AMDa obeacana je revoluciju u pogledu smanjenja potrosnje do 40% jednom kad se pocne koristiti HBM, a GDDR5 ode u povijest. Kad ono prema shushka sajtu ispalo ovo nove kartice pa jos +25W TDP u odnosu na 290Xichinih 275W. Dobro tih +25W i "nije tako strasno" jednom kad kartoica predje 300W no prema slideware hype ja sam imao pretjerana ocekivanja glede toliko nahvaljenog FijiXT/FuryX i max TDP od nekih 200W (dobro, ocekivao sam ja i prolazak Fijia u cetvrtfinale FIFA U20 svjetskog kupa al nis od toga)

Boldano nije istina, nisi baš razumio. Radi se o tome da se prelaskom na HBM potrošnja memorijskog podsistema (dakle ne same grafičke) drastično smanjiti naspram ddr5. A grafa kolko troši troši. Znači:

The end result is a 300% improvement in bandwidth per watt. Attained through significantly higher bandwidth and significantly reduced power. More interestingly, AMD estimates that 15-20% of the R9 290Xs 250W TDP is for the memory sub-system. Which means that AMD can reduce the memory power consumption from 40-50W down to 15W just by switching from GDDR5 to HBM. A 290X that utilizes HBM as a result would be a 215W GPU, rather than a 250W one. We expect to see this materialize with AMD’s upcoming flagship Radeon based on the Fiji GPU.

Što se tiče navodnog povećanja potrošnje Furyja naspram 290X, brutalno je efikasniji:

Fiji, and the Fury line of cards which are based on it, feature notable improvements across the board. Performance is obviously significantly improved. Fury X is faster than the R9 290X by a minimum of 54%. Which brings us to the second major improvement. Fury X achieves this performance improvement with a TDP that’s a meager 10W higher. Which makes Fury X 48% more power efficient than AMD’s previous single GPU flagship the R9 290X, which is quite remarkable.

Going back to the technical specifications of Fiji. AMD has doubled the Render Output Units, ROPs, with Fiji compared to Hawaii. So even though the core count has gone by less than 50% AMD decided to double the ROP count. Which shows a major focus on performance at high resolutions. In which ROPs are taxed the most.

AMD has also managed to significantly improve the area efficiency. We don’t have an official die size for Fiji yet but we do have a fairly good idea about how large this chip is. And what we are able to conclude is that AMD has managed to improve the performance by over 50% with Fiji vs Hawaii. While only expanding the silicon area, i.e. size of the chip, by roughly 25%. Which means that AMD has achieved the holy trifecta of semiconductor engineering. Greater performance, greater power efficiency and greater area efficiency.

Read more: http://wccftech.com/amd-radeon-fury-...#ixzz3dArZcQg1