Confirming Your Jasper

If you can physically open the box, there's another way of confirming that you have a Jasper without even opening the plastic bag that the console comes in: look at the power connector on the Xbox 360 itself. Each Xbox 360 generation has a power connector that's keyed differently so you can't use a lower powered power supply on a console that requires more power. Now all Xbox 360 power supplies will work on newer consoles, but you can't use newer power supplies on older consoles. Make sense? Let me explain:

The first Xbox 360 (Xenon) needs a 203W power supply. Falcon needs a 175W power supply but can also work with the 203W unit (it just doesn't need to draw that much power so the 203W unit is overkill, but it'll work). Jasper needs 150W but can work with a 203W and a 175W. In other words, the Xbox 360 power supplies are forwards but not backwards compatible.

If you get a Jasper it's not guaranteed that you'll get a 150W power supply, Microsoft still has a lot of Falcons and Falcon-parts in its distribution system so some Jaspers have been sighted with 175W power supplies. If you end up with a 175W unit it's not a big deal, it's going to be slightly less efficient than the 150W unit and your system may end up drawing an extra few watts but it's not a big deal at all - you'll still be far cooler/more power efficient than a Falcon (and possibly be red-ring-free).

To prevent an under powered power supply from being used in the wrong Xbox, Microsoft keyed each of the three Xbox 360 generations differently. The chart below explains it all:

Click to Enlarge

If you see one flat bar on top and a square peg in the middle of the power connector on the console itself you've got a 1st generation Xenon or Zephyr board, these machines use 90nm CPUs and GPUs. If you've just got a flat bar on top with no square peg in the middle, you've got a 2nd generation Opus or Falcon board, these things use 65nm CPUs and 80nm GPUs. Finally if you've got a flat bar split in two on top with no square peg you've got a Jasper, that's a board with a 65nm CPU and a 65nm GPU.

Identifying a Jasper Jasper Dissection
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  • HYPhoenix - Saturday, September 26, 2009 - link

    is it possible for someone with a mid level knowledge of hardware to switch the power connector on the console to make it look like jasper?

    The question is just out of pure curiosity.
  • abul3ass - Monday, June 29, 2009 - link

    My xbox360 has a Zephyr chip and uses 16,5A current rating.. I was wondering if i could put this xbox's CD drive into my new xbox that contains the Falcon chip with a 14,2A current?

    Thanks in advance.
  • Sasparilla - Monday, November 26, 2012 - link

    It depends if you can even use that drive (it has to be the exact same kind and Microsoft used several different kinds throughout production of the Zephyr / Falcon / Jasper machines) and then on top of that Microsoft tied each individual drive via its ROM to each individual xBox (why did they have to make it so hard to keep your machine if your drive failed?) - so if you have the exact same drive type and you have to be able to switch the ROM (a couple of drives this is just unplugging and replugging cables, other drive types you literally have to flash the drive with a copy of the ROM from the original) then you can.
  • chashint - Saturday, June 6, 2009 - link

    I know this is an old article but I am really surprised that the author chose not to do any research into the manufacturing processes of lead free solder and instead chose to generate and perpetuate urban legends in regards to it.

    Most of the comments that have been made about the solder, and the design process also illustrate a complete lack of knowledge about the subject matter. Ball grid array packages have been very common for years and the cirduit cards they are soldered to are very well characterized and understood by the circuit designers. To suggest otherwise is a real stretch.

    There is only one significant issue that plagues the lead free solder process and it is a worldwide industry issue.
    It is called "tin whiskers" which are strands of crystalized tin that grow out of the lead free solder. These whiskers can grow out of the solder connections and create shorts with adjacent conductors.

    Since consumer electronics are now considered disposable not many manufacturers worry a whole lot about this, however it is a huge reliability issue with electronics that are used for aircraft, ships, television stations, power plants ... another words for anything that is expected to last for a long time.

    Some of you have speculated about the glue under one of the components, if this component is a BGA package I will speculate that the adhesive may be there in an attempt to stop tin whiskers from shorting to the adjacent solder joints.
  • ColdFusion718 - Thursday, December 23, 2021 - link

    Microsoft revealed the root cause of the RROD and it's not tin whiskers. Funny that you're giving the author flack for not doing research and perpetuating urban legends when you yourself are parroting similar things.

    The author speculated (correctly) that the root cause could have been the solder balls (bumps) between the die and the substrate itself.

    Here's Microsoft talking about the break-through after months of testing:

    The video is from December 13th 2021, so it's very recent. Thought you'd like to know.
  • theolar - Thursday, May 14, 2009 - link

    I've just purchased on of these for my grandsons. I have not received it yet, but I do have the Model # 52T-00141. Can I tell if its a Jasper by that number? If it isn't, I'd like to return it without even opening it.
  • rfast10 - Sunday, March 22, 2009 - link

    So i bought a360 Elite July 25/08. Just 2 days ago i got the E74 single red ring and now my elite will not run period, I'm currently waiting to ship it out to get repaired. Now my Elite has a MFD of Jan.19/08 BUT says 16.5a on the 12v rail, THE TWIST is i have a 175w falcon power brick. So indeed my Elite is a Falcon despite the misleading labels on the back of the console. My xbox elite BOX says LOT NO: 0803 TEAM:CSON and it says 47-63Hz, 203W!!!!!!! Definitely misleading give the power brick is a falcon and the connector on the console is a falcon!!!!! Now im not going to wait to send out my console, get it repaired and get it back, im going to buy another one, i would like to get the PRO but after alot of searching i havent read there have been sightings for the JASPER on the PRO 60gig console,,,,so is this true??? i dont want an arcade BUT i want a JASPER...but let it be known to ALLLLLLL ive owned my 360 ELITE for just UNDER 8 MONTHS and got E74, i knew of ALL the problems and BABIED my machine! its definitely the GPU as my HDMI cable is working FINE...and when i smell the machine around the HDMI/AV connectors it smells BURNT, DEFINITELY something overheated and malfunctioned most likely the GPU has been dislogded or damanged and I HOPE when my ELITE gets repair they repair it with the JASPER motherboard...
  • Sasparilla - Monday, November 26, 2012 - link

    Sorry to hear your bad luck on this. Microsoft set up an extensive reprocessing process for RROD 360's (presumably they thought this would be cheaper than actually redesigning the console and providing folks with one that doesn't RROD) and it involves taking the old RROD console and sending out one in its place that previously RROD'd but had been made to work again (they're not new).

    They guaranteed to do this for 3 years, if memory serves, obviously the machines folks got in their place would RROD again at a very high rate as nothing was fixed, just made to work again and you got someone else's old RROD'd 360. Folks talked of having 5 or 6 360's that have RROD'd after they send theirs in after their initial RROD because of this.
  • blau808 - Wednesday, March 11, 2009 - link

    Does the die shrink mean cooler temps and a less noisy fan? I bought my xbox the day it was released and was surprised how noisy it was. It sounds like a turbine compared to my ps3 or pc. If it sit on the floor next to it, it vibrates the floor. Does Jasper bring a little peace and quiet? Also since it uses less power, is the brick a different size? i.e. not the size of an actual brick?
  • Sasparilla - Monday, November 26, 2012 - link

    For the most part no, because the primary cause of the turbine noise is the fact that the DVD spins at such a high speed (most noise is coming from it) and that is still there no matter what version of the 360 you get.

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