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posted by janrinok on Saturday November 07 2015, @03:12AM   Printer-friendly
from the 8=4 dept.

In 2011 AMD released the Bulldozer architecture, with a somewhat untraditional implementation of the "multicore" technology. Now, 4 years later, they are sued for false advertising, fraud and other "criminal activities". From TFA:

In claiming that its new Bulldozer CPU had "8-cores," which means it can perform eight calculations simultaneously, AMD allegedly tricked consumers into buying its Bulldozer processors by overstating the number of cores contained in the chips. Dickey alleges the Bulldozer chips functionally have only four cores—not eight, as advertised.


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  • (Score: 5, Informative) by Hairyfeet on Sunday November 08 2015, @01:21AM

    by Hairyfeet (75) <bassbeast1968NO@SPAMgmail.com> on Sunday November 08 2015, @01:21AM (#260184) Journal

    You are reading it wrong because you are ignoring this part, bold for highlight.."Two symmetrical 128-bit FMAC (fused multiply–add capability) floating-point pipelines per module that can be unified into one large 256-bit-wide unit if one of the integer cores dispatches AVX instruction and two symmetrical x87/MMX/SSE capable FPPs for backward compatibility with SSE2 non-optimized software."

    So each core still has a FPU, it simply has a weaker 128bit FPU that can be combined into a single 256bit FPU if AVX instructions are required. The reason why they did this their engineers have spoken at length about, they believed multicore processing was the future (which it is) and would be upon us as quickly as 64bit computing was (which it wasn't) and so bet on having more cores versus having higher performance per core. If you are like me and are using plenty of multicore aware tasks like transcoding or effects layering? This kicks ass because having high single core performance would be slower than having multicores working on the task, while for someone that used nothing but single process programs it would be a better choice to go for a higher per core performance over having more cores.

    So it isn't a "half core", it is simply a different approach to the same task.

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  • (Score: 3, Informative) by edIII on Sunday November 08 2015, @02:05AM

    by edIII (791) on Sunday November 08 2015, @02:05AM (#260205)

    Thanks for the explanation

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