The Google translation says:
So I'm assuming the reference to the UM is for the MacBook Air.
The LM versions are also the direct replacements to the LV Penryns.
The LM and UM, especially the UM, have quite impressive Turbo modes.
The LM is essentially DOUBLE the normal clock speed of the UM. The UM isn't the stated "Low Voltage" CPU like the MBA currently uses, it's ultra low voltage. The thing is the current SL9x00 uses 17w, then the chipset uses 12w - totaling 29w. The Intel Core i7-6x0LM is a 25W CPU and includes the GMA IGP, Northbridge and Southbridge. So Intel alone would use less power from just the upgraded Core i7 replacements for the SL9x00 CPUs.
I would much prefer the Core i7-640LM over the Core i7-640UM. We're talking 2.13 vs. 1.2 GHz normal clock speed. As I have mentioned elsewhere, the Core i7-640UM is actually closer to the way the current CPU is utilized in the MBA because Apple throttles the SL9x00 CPUs. However, the SL9x00 is throttled on average to 1.6 GHz and is marketed as 2.13 GHz even though it rarely operates there.
It's hard to say what Apple will ultimately use, but I find it hard to think Apple would be happy saying MBA a 1.2 GHz CPU... that's a marketing problem. Therefore, the stated Core i7-6x0LM makes far more sense from a marketing perspective. However, if we think about the TDP of a dedicated graphics card, 25W TDP for a Core i7 + another 12W to 16W for a dedicated graphics card is too hot.
What I hope is that Apple can figure out how to turn off the IGP when utilizing the dedicated graphics. Right now, we know Optimus just turns on the dedicated graphics when needed, but the Intel GMA IGP stays on at the same time. That may not work with the MBA, unless Apple can set the dedicated graphics to only turn on when a certain threshold is met and needed. Therefore, the vast majority of the time, let's say unless the MBA is also plugged in, the dedicated graphics stays off. That way when connected to an LED ACD it can drive the display and graphics performance needed. It's difficult to envision just using Intel's GMA IGP again... but it's difficult for Apple to give us dedicated graphics in a confined space with limited cooling.
I think we're going to have to make some compromises to get both a Core i7-640LM in the high-end MBA and dedicated graphics. We certainly don't want the same problems as the original MBA. I feel like Apple is going to have a problem sticking with only Intel's GMA IGP since Apple bashed it and we all experienced it with the original MBA. So we have a dilemma, and I don't know how it's going to play out... but I have speculated about this for ten months.
I still am not even positive that this update will not have the same SL9x00 CPUs, Nvidia upgraded GPU, plus RAM and drive space upgrades. I also wonder if Apple needs even more time to determine this whole Arrandale switch and could even stick with C2D in the low-end MBPs, MBAs, MBs, Mm, and even iMac until Apple can find a solution that could work across its entire Mac platform. We all want to believe this update will have Arrandale, dedicated graphics and more but we might be one update off yet. Or, we might have a lot longer wait than the MBP has...