Rumor: AMD’s New 28nm GPUs in December

AMD’s 7 series is currently rumored to hit December 6th according to industry sources. Southern Islands is the code name for the new GPU series from AMD and it is also expected to use a new type of memory. Yep, you may recall that AMD will ditch GDDR5 in favor of Rambus XDR2. Here’s what the 7 series from AMD currently may entail via a chart from tomshardware:

Furthermore, Rambus claims that XDR2 has twice the bandwidth of GDDR5 and it will utilize 30% less power than GDDR5:

The XDR™2 memory architecture is the world’s fastest memory system solution capable of providing more than twice the peak bandwidth per device when compared to a GDDR5-based system. [Furthermore], the XDR 2 memory architecture delivers this performance at 30% lower power than GDDR5 at equivalent bandwidth.

It is also worth nothing that AMD will be switching from a VLIW (very long instruction word) architecture to a more SIMD (single instruction, multiple data) approach similar to Nvidia’s architecture. AMD is calling this new approach GCN (graphics next core). So, let’s quote one of our previous articles to break this new approach down:

This change allows for better GPGPU performance. VLIW5 and VLIW4 were efficient for graphics calculations, but not for general purpose (varying) CPU computations. SIMD brings the best of both worlds. In fact, Nvidia has been using this for quite some time…

Basically, it looks like AMD’s 7 series will be better suited for GPGPU (general purpose graphics processing unit) tasks.