Xbox 360:GPU Retrofit

From ConsoleMods Wiki
Revision as of 12:41, 29 April 2024 by Senator-man (talk | contribs)
Jump to navigation Jump to search
Exclamation-triangle-fill.svgThis page is intended for advanced technicians only. If you do not have advanced component and BGA rework skills, you will not be able to complete the process successfully.


Some GPUs can be retrofitted onto earlier boards. This page contains instructions for what changes need to be done in order for the retrofit to work.

Xenon

All variants of the phat GPU can be retrofitted onto a Xenon motherboard. (Demo Video with GPU RHEA)

Guide By: Senator_man

Limitations

Read this BEFORE doing anything with board

90nm chips are work without huge modifications on board because they very similar to factory ones, but there is still some aspects i must mention:

Limitations of board with 90nm GPU:

  • Standart JTAG wiring will cause RROD with 0021 error code. So use this one:
    • IMG 20240415 134219.jpg
  • Board with Samsung RAM will NOT boot RGH2, because on Xenon it uses Falcon(at least at this moment) bootloader which haven't support for this RAM

Limitations of board with 65nm GPU:

  • Retail Xenon firmware will NOT boot because it has no support for 65nm gpu, so you need to to xeBuild as Jasper
  • Jasper firmware can NOT be booted without blowing fuse
  • Jasper firmware has NO support of Xenon type 1 KV, so Retail nand can be only booted on Elpis motherboard with Jasper firmware
  • JTAG is not tested

Instructions

GPU Table

Name Part Number Specifics GPU/eDRAM Lithography GPU/eDRAM Temp Target GPU/eDRAM Temp Critical
Y2 X02127 Unreliable 90nm/90nm 80C/82C 100C/102C
Rhea X810480 Unreliable

with black underfill

90nm/90nm 75C/78C 100C/102C
Rhea

(revisited)

X810480

X816970

X816971

All chips

with white underfill reliable

90nm/90nm 75C/78C 100C/102C
Elpis X819195 no need to do

PCI_e swap

90nm/90nm 75C/78C 100C/102C
Zeus X810478
X817793
- 65nm/90nm 71C/73C 90C/92C
Kronos X820894 - 65nm/65nm 75C/77C 90C/92C

Install GPU

  • Replace 90nm U4D1 with 90nm or 65nm

PCI_e Swap (not needed for Elpis GPU)

Main modification to install newer chips, scheme of wiring:

  • PCI e swap.png


Example of perfoming this mod:

  • PCI e swap example pt1.png
  • PCI e swap example pt2.png
  • PCI e swap example pt3.png
  • PCI e swap example pt4.png
  • PCI e swap example pt5.png
  • PCI e swap example pt7.png


Modification for 65nm

GPU part of your board is now basically is Zephyr_B/C, if you installing 65nm chip follow instructions down below. This is no need to do any other changes for 90nm chip.

Modify Firmware

  • Use J-Runner with Extras to dump the nand
  • RGH/JTAG the console to get the CPU key
  • Set the required XeBuild options and build the image
  • Open the SMC Config Editor from the Nand menu, and update the thermal targets from the table above
  • Write the nand to the console

Zephyr_B/C

Both variants of the 65nm GPU can be retrofitted onto a Zephyr_B/C motherboard. (Demo Video)

Guide By: Octal450

Instructions

GPU Table

Name Part Number GPU/eDRAM Lithography GPU/eDRAM Temp Target GPU/eDRAM Temp Critical
Zeus X810478
X817793
65nm/90nm 71C/73C 90C/92C
Kronos X820894 65nm/65nm 75C/77C 90C/92C

Install GPU

  • Replace 90nm U4D1 with 65nm

Set VID 1.075V

  • Remove 0 ohm R8B9
  • Remove 0 ohm R8B10

Set FSB/PCIe/Memory Calibration

  • FSB:
    • Remove 4.87K ohm R5R3
    • Install 40.2 ohm as pullup to nearby V_GPUCORE
      • You can either use a wire to the capacitor as shown, or scrape to expose V_GPUCORE voltage plane
      • Fsbcal65.pngFsbcal65b.png
  • PCIe:
    • Remove 1.47K ohm R4R3
    • Remove 562 ohm R5D1
    • Replace 2K ohm R5D2 with 49.9 ohm
  • Memory:
    • Replace 40.2 ohm R4R8 with 240 ohm
    • Replace 40.2 ohm R4T1 with 240 ohm

Tie V_GPUPCIE to V_GPUCORE

  • Remove IC U5C1
  • Install jumper as shown to tie V_GPUPCIE to V_GPUCORE
    • Use a 28awg or thicker gauge wire
    • Be careful not to short to any nearby components or pads
    • Strongly recommended to cover jumper with PCB mask
    • Vpcietie65.png

Modify Firmware

  • Use J-Runner with Extras to dump the nand
  • Change the type to Jasper 16MB, then RGH the console to get the CPU key
  • Set the required XeBuild options and build the image
  • Open the SMC Config Editor from the Nand menu, and update the thermal targets from the table above
  • Write the nand to the console

Falcon

Both variants of the 65nm GPU can be retrofitted onto a Falcon motherboard. (Demo Video)

Guide By: Octal450

Instructions

GPU Table

Name Part Number GPU/eDRAM Lithography GPU/eDRAM Temp Target GPU/eDRAM Temp Critical
Zeus X810478
X817793
65nm/90nm 71C/73C 90C/92C
Kronos X820894 65nm/65nm 75C/77C 90C/92C

Install GPU

  • Replace 90nm U4D1 with 65nm

Set VID 1.075V

  • Remove 0 ohm R8B9
  • Remove 0 ohm R8B10

Set FSB/PCIe/Memory Calibration

  • FSB:
    • Install 40.2 ohm R4R9
    • Remove 4.87K ohm R5R3
  • PCIe:
    • Remove 1.47K ohm R4R3
    • Remove 562 ohm R5D1
    • Replace 2K ohm R5D2 with 49.9 ohm
  • Memory:
    • Replace 40.2 ohm R4R8 with 240 ohm
    • Replace 40.2 ohm R4T1 with 240 ohm

Tie V_GPUPCIE to V_GPUCORE

  • Remove 0 ohm R4C31
  • Install 0 ohm R4P13
  • Install 0 ohm R4P14
  • Remove IC U5C1

Modify Firmware

  • Use J-Runner with Extras to dump the nand
  • Change the type to Jasper 16MB, then RGH the console to get the CPU key
  • Set the required XeBuild options and build the image
  • Open the SMC Config Editor from the Nand menu, and update the thermal targets from the table above
  • Write the nand to the console

Jasper

The Kronos GPU can be retrofitted onto a Jasper motherboard. (Demo video)

Guide By: Octal450

Instructions

GPU Table

Name Part Number GPU/eDRAM Lithography GPU/eDRAM Temp Target GPU/eDRAM Temp Critical
Kronos X820894 65nm/65nm 75C/77C 90C/92C

Install GPU

  • Replace Zeus U4D1 with Kronos

Modify Firmware (Optional)

  • This step is optional, Zeus targets 71C/73C, there is no harm by running the chip a few degrees cooler
  • Use J-Runner with Extras to dump the nand
  • Open the SMC Config Editor from the Nand menu, and update the thermal targets from the table above
  • Write the nand to the console