Identifying a Jasper

Unlike the Falcon transition, the move to Jasper isn't very clean cut. You can't rely on a lot number or manufacturing date to tell you whether or not you've got a Jasper, there are some hints and only one sure-fire way to determine if you're holding a box with a Jasper inside without actually opening the packaging.

The hints are pretty basic: the Xbox 360 Arcade bundles appear to be the best chance at getting a Jasper right now, although there have been reports of some Xbox 360 Pro systems featuring Jasper. As of now there haven't been any confirmed Elites that have the Jasper boards in them. Remember that Jasper is not only a potential fix for the RRoD, but is also a cost reduction for Microsoft - the GPU die is smaller and the power supply is less powerful, which means lower overall costs - something that makes the most sense in the most price constrained of the three Xbox 360s available today: the $199 Arcade.

Xbox 360 Arcade Things to Look For Likelihood that You've Got a Jasper
Lot # 0842X or newer Maybe
Xbox 360 Arcade Sticker Markings XGX-00019 Probably a Guarantee
Xbox 360 Arcade Sticker Markings Value Bundle 2008 E Probably a Guarantee
Current Rating on 12V Rail 12.1A Guaranteed


The first thing you'll want to do is look at the sticker on the outside of the box, this will have the lot number, team and some other potentially useful information. The lot numbers you're looking for are 0842X or newer, although unlike Falcon-hunting, the lot number won't guarantee you a Jasper. The lot number refers to the year and week that the console was built, 08 being the year, 42 being the 42nd week of the year. The X is there for, well, good luck I guess. The team isn't as important as it was in the Falcon days either, Xbox 360 Arcade bundles marked lot 0842X from team CSON and FDOU have been both Jasper or Falcons.

If you can't rely on the lot number and manufacturing team, then what can you? The sticker on the side of the box holds the first clues, while you can find the lot number here that's just a quick way of determining the likelihood of you having found a Jasper (e.g. if your lot number is really old, like 0830 then it's not a Jasper). There are two lines that right now appear to be good indications that you may have found a Jasper, I've highlighted them in the picture below:

If you see this XGX-00019 line below the top barcode, chances are that you've got a Jasper. And if you see this Xbox 360 Arcade System Value Bundle 2008 E line (exactly like that, note that this only applies to Arcade units) then you most likely have a Jasper as well. If you want full confirmation though you'll need to look at the current rating on the 12V rail which, believe it or not, you can do without ever opening the box.

Microsoft cut out a little window in the Xbox 360 packaging to allow the barcode/serial number to be scanned. Looking through this window the information you want is most likely obstructed by the cardboard cutout and it's to the left of the opening. The least destructive way to get access to this information is to push down on the Xbox 360 itself through the window on the right side, which will hopefully reveal the information you're looking for. A quicker, easier and potentially get-you-kicked-out-of-the-store way is to push the cardboard itself to the left a bit, possibly even tearing it slightly, to reveal the text you're interested in. The line you're looking for is this:

12.1A on the 12V rail nets you a Jasper

The important text is the current rating on the 12V line, which is immediately to the left of the current rating on the 5V rail. The three options here are 16,5A, 14,2A and 12,1A. All that really matters is the last digit, if you see a 5 then you've got a Zephyr, if you see a 2 you've got a Falcon (most likely) or if you see a 1 you've got a Jasper (take it and run).

12V Current Rating Xbox 360 Revision
16,5A Zephyr
14,2A Falcon
12,1A Jasper


Now some Jaspers have been mislabeled as 14,2A, but no Zephyr or Falcon has been mislabeled as 12,1A. The explanation is simple, this rating indicates what sort of power supply you'll need to use with the machine. Zephyr and Falcon boxes can't run with only 12.1A on the 12V rail, you'd end up with a box that either crashed a lot, rebooted or had other undesirable behavior (assuming it would even start, assuming you could even find a power supply that you could plug into it). There's only one Xbox 360 power supply that can deliver a max of 12.1A on the 12V rail, that is the 150W power supply that is keyed to only work on Jaspers. Find a machine with 12,1A written on the back of it and you've got yourself a Jasper.

Sneaky Microsoft: Still Shipping Zephyrs

In my Jasper hunting I came across a strange beast, I found an Xbox 360 Pro with lot number 0843X. I figured it was new enough that it could be a Jasper, but looking at the 12V current rating I found that it was a 16.5A unit. I thought perhaps it was mislabeled and I'd heard about some newer systems having a 16.5A 12V rating, so I thought I'd buy it and take a closer look.

Once I got it home I confirmed: the machine was a Zephyr, that's the original Xbox 360 hardware with HDMI support, meaning a 90nm CPU, 90nm GPU and 90nm eDRAM - the very configuration most likely to Red Ring. I'm guessing it's a reworked Xbox 360 that never made it out of the factory in the first place due to an instant failure; something Microsoft fixed and sent out at a much later date.

Even if you don't care about getting a Jasper, it may be worth looking into what it is you are getting to make sure that you're not stuck with a box that's more likely to fail.

Index Confirming Your Jasper


View All Comments

  • george1976 - Thursday, December 11, 2008 - link

    I feel sorry for the x360 buyers that experienced RROD. I cant picture myself buying a product with such a high rate of failure.....50%???? Damn. Reply
  • TiM3SH1FT - Thursday, December 11, 2008 - link

    Anyone knows if the new Jasper is out on other models than the Arcade?

    I'd like to have Jasper but not the arcade pack...

    Also how do I transfer my HDD content to a new HDD?
  • 01wolff - Thursday, December 11, 2008 - link

    When you get a Xbox that has a larger hard drive, you can go on the Xbox 360 site under support and request the transfer kit. It is free from microsoft. They messed up and sent me two of them. If you buy just the hard drive, some come with the kit already (like the 120Gb hard drives). If you just change from one 20Gb to another 20 Gb drive, or from a 60 Gb drive to another 60Gb drive.... Microsoft won't do anything. You have to go up in hard drive capacity. Once you have the kit, then you have to go on the 360 site to modify your DRM information also.

    The alternitave is to not get the transfer kit, change your DRM info on the site, and download everything again. I think using the kit is a better option. (did it from my 360 Prem to my 360 Elite)
  • Myrandex - Thursday, December 11, 2008 - link

    I'm not saying that the failures are made up, but I did want to indicate that I have an original XBox360 Premium and it is still standing up well to the test of time. I have thought about trying to get it real hot and see if it fails just to RMA it and hope for a new one with maybe HDMI and less electricity usage, but I'm pretty satisfied with mine.
  • 01wolff - Thursday, December 11, 2008 - link

    After reading this I had to check both of my 360's. What I found baffled me. My Elite 360 had the 12v like the Jasper, but the second-generation power plug. Hummmmmmmm. Reply
  • rekcah2000a - Thursday, December 11, 2008 - link

    Same here 16.5A on sticker but power supply 175W and Opus/Falcon power connector
    A new strange beats from M$ ?
    Tom from BELGIUM
  • bill3 - Thursday, December 11, 2008 - link

    The power usage comparisons, and most important the die size comparisons are great stuff for console/GPU tech junkies like myself.

    Although now that I've seen the comments wishing for noise level comparisons, I have to admit that would have made the article complete..
  • bill3 - Thursday, December 11, 2008 - link

    Besides comparing Xenos to X1800, another inaccuracy was referring to the 256MB internal flash as a improvement. All that does is replace the 256 MB external memory card that used to come with Arcade unit. In essence the same memory card comes with the unit as before, it has just now been made internal. If anything this is a downgrade, as the external mem card has the advantage of portability, aka taking your profile and saves to a friends house and so forth.

    I believe MS made the memory internal to prevent it from being separated from the console in anyway (lost, etc) and having consoles not capable of running NXE (NXE requires 128 MB memory I believe, though I'm not sure if thats only for the install?) out there in the wild. That's my theory.
  • poohbear - Thursday, December 11, 2008 - link

    BLASPHEMERSS!!!!! you review console stuff on a pc hardware site?!!?!?? how could u
  • strikeback03 - Thursday, December 11, 2008 - link

    The subtitle says "your source for hardware analysis and news". As this is hardware, I'd say it fits more than reviews of games... Reply

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