Sandy Bridge roadmap leaked

Details of Sandy Bridge CPUs have turned up on the web thanks to a leak by a German magazine.

Computer Base seems to have managed to get its paws on some details of some of the mobile Sandy Bridge processors. They are a little different to the roadmap slides which have been seen so far.

To throw a spanner in the works, Intel has made some changes to its model number scheme. Desktop CPUs will carry K, S, T as their suffixes. K is the same as the current K models, S is similar again to Intel’s current S suffix CPUs. Models with a T on the end have a TDP of 35-45W, will a reduced clock speed. All Sandy Bridge processors will have a four digit model number, plus a potential suffix letter. We are glad they sorted that one out.

Looking at less esoteric details, it seems that Intel has almost completely dropped support for hyperthreading on the quad core models. Only the Core i7 LGA-1155 processors still support it.

The Core i7s are also the only models that will have 8MB of L3 cache. The Core i5’s have 6MB of L3 cache. The Core i5 2930T has 3MB L3 cache.

The Core i3s become dual core processors with Hyperthreading, but no Turbo boost and a mere 3MB of L3 cache.

Only two K models will see the light of day. These are the Core i7 2600K and the Core i5 2500K.

There might be a Core i7 2600S with a default clock of 2.8GHz instead of 3.4GHz.

There are seven Core i5 models mentioned, but only three model numbers so we can’t really tell what Intel is up too here.

The new mobile Sandy Bridge processors seem to have four Core i7 models and only two Core i5 models. There is an Extreme Edition here which uses the XM suffix and two quad core models that carries the QM suffix. Those listed alongside the XM model are all quad cores.

The 2920XM and the 2820QM come with 8MB of L3 cache while the 2720QM has 6MB. The Core i7 2620M is dual core with Hyper-Threading and 4MB of L3 cache. The Core i5 models are both dual core, but with 3MB of L3 cache.

The leaked slides are mostly for Intel’s business platforms so it is fairly likely that we will see other models for other markets.

There are some other interesting stuff in the slides. The Sandy Bridge processors will use AES-NI with Advanced Vector Extensions support which can improve performance for some tasks.

It looks like Intel has been tinkering with its Turbo Boost feature if only because it is called version 2.0 which is supposed to manage clock speeds better.

Intel has been talking about a new IGP which is referred to as “GT2” on the roadmaps. Intel has been talking about sticking the IGP on die for a while.