is to be said that August onwards manufactured are Jasper unit..

yes,Jasper are stil modable.

I got myself one for testing..so far runing ok,and it's obvious feel from the external that the heat seems to be reduce..

It is equally as irresponsible to claim there are no definitive answers while there actually are.

The first few Jaspers to show up in the wild didn't even have HDDs. They were arcades, with built-in 256MB of flash mem.

Right now there are some sellers claiming they have Jaspers and have been advertising Jasper units and the proof they have is a lot number and a manufacturing date, as well as some venting holes on the PSU. Now, lot number and manufacturing date are very inconclusive, as there are multiple teams and multiple production lines, and Jasper was rolled out on one line first, not all at once. moddage's Jasper date of 28-10-08 and lot number of 083X is proven, but there could well be earlier Jaspers, and other lines may only have begun production much later.

Bottom line is that this is a transitional period, there is no definitive and conclusive evidence that a Jasper is a Jasper based on mfg date or lot number or brick wattage alone. However, since Jaspers are the only ones that can use 150w bricks, that is a good indicator. The thing is, you want to identify a Jasper based on evidence on the console itself, not a power brick. Only then can you be truly sure.

The DEFINITIVE way to verify your console:

1) split pin female connector on the rear of console. This is compatible with the 150w male plug.
2) 12.1A displayed on rear of console.
3) reports of being able to see the Jasper sticker through the rear vent holes. Moddage's Jasper clearly has a sticker on the board near the fans saying, well, "Jasper".