Tuesday, May 3rd 2016
Intel Intros "Crystalwell" IGP Based Core "Skylake-R" Embedded CPUs
Intel introduced a trio of embedded CPUs for SFF desktops and industrial PCs (IPCs), based on its "Skylake-R" silicon. This variant of Skylake features the largest integrated GPU Intel ever made - the Intel Iris Pro 580. This IGP features 72 execution units (compared to 24 on, say, the i7-6700K), and relies on a 128 MB eDRAM L4 cache for fast frame-buffering operations. The IGP uses this tiny yet fast cache, in conjunction with its traditional UMA system memory share, as video memory. The "Skylake-R" package is a multi-chip module of the main die with four "Skylake" CPU cores and the 72-EU IGP, and a second die housing the L4 cache.
Among the three "Skylake-R" chips Intel launched are the Core i7-6785R, the Core i5-6685R, and the Core i5-6585R. The i7-6785R features HyperThreading enabling 8 logical CPUs, 8 MB of L3 cache, and 3.30 GHz nominal clock speed, with 3.90 GHz Turbo Boost. The i5-6685R and the Core i5-6585R lack HyperThreading, and feature just 6 MB of L3 cache; the former features clock speeds of 3.20 GHz nominal with 3.80 GHz Turbo Boost, while the latter offers 2.80 GHz nominal with 3.60 GHz Turbo Boost. All three feature iGPU clocks of 350 MHz nominal, with up to 1150 MHz boost. The 14 nm chips further feature TDP of 65W, and feature dual-channel memory controllers that support both DDR4 and DDR3L memory. Sold in the OEM channel, the i7-6785R, i5-6685R, and i5-6585R, are priced at US $370, $288, and $255, respectively, per-piece, and in 1000-unit tray quantities.
Source:
AnandTech
Among the three "Skylake-R" chips Intel launched are the Core i7-6785R, the Core i5-6685R, and the Core i5-6585R. The i7-6785R features HyperThreading enabling 8 logical CPUs, 8 MB of L3 cache, and 3.30 GHz nominal clock speed, with 3.90 GHz Turbo Boost. The i5-6685R and the Core i5-6585R lack HyperThreading, and feature just 6 MB of L3 cache; the former features clock speeds of 3.20 GHz nominal with 3.80 GHz Turbo Boost, while the latter offers 2.80 GHz nominal with 3.60 GHz Turbo Boost. All three feature iGPU clocks of 350 MHz nominal, with up to 1150 MHz boost. The 14 nm chips further feature TDP of 65W, and feature dual-channel memory controllers that support both DDR4 and DDR3L memory. Sold in the OEM channel, the i7-6785R, i5-6685R, and i5-6585R, are priced at US $370, $288, and $255, respectively, per-piece, and in 1000-unit tray quantities.
20 Comments on Intel Intros "Crystalwell" IGP Based Core "Skylake-R" Embedded CPUs
Even with that skylake die, they could make it fit in a desktop chip. They would need to reorient the parts to be more square than rectangular, though.
As for my labeling sorry should read edram for gpu I shouldn't make pictures while in class.
Can someone explain why this eDRAM is so big (physical size)?
For example Micron produces 8GBit DRAM chips that are in 9x13.2 mm BGA package (die itself is surely smaller).
8GBit is 8 times more memory than 128MB.
Also look at any regular 8GB or 16GB memory stick, memory chips are not so big.
Desktop DDR4 @ 3200 MHz = roughly 44000 MB/s. L3 cache on-chip with Skylake = 275 GB/s, going on 6x faster, with 11ns latency vs ~52ns latency on DDR4. The L4 cache is also connected "to the system" in a much different way.
AFAIK, the 2nd die is all cache, and the added execution units are inside the smaller chip (which is what makes the smaller chip larger than a standard desktop Skylake chip.
On the desktop side, the standard configuration comes with 24 EUs and takes roughly ~50% of the die. Therefore we can extrapolate that the GPU in the 72EU part takes 75% of the die.
I have no idea why they chose to stack the two dies on top of each other instead of putting them parallel, side by side.
I want another tinybox desktop with this.
Compare that to a 4950HQ, the compute die is still very big compared to crystal well the only difference is that the compute cores have been elongated and made to be more rectangular than square. The picture in the OP seriously just looks like Skylake with Crystal Well slapped on (even if it's not as simple as merely "slapping it on".)