Replacing the graphics processing unit in a water-cooled 8335-GTW or 8335-GTX system

To replace a graphics processing unit in a water-cooled system, complete the steps in this procedure.

Procedure

  1. Ensure that you have the electrostatic discharge (ESD) wrist strap on and that the ESD clip is plugged into a ground jack or connected to an unpainted metal surface. If not, do so now.
  2. Remove the GPU from the protective packaging. Remove the protective covers from the bottom of the GPU.
    Remove the protective cover starting with its corner.
  3. Using your labels, noting the orientation of the GPU, use the alignment pins under the GPU to carefully insert the GPU onto the system backplane.
    Figure 1. Replace GPU
    Replace GPU
  4. Secure the GPU to the system backplane. Use a #2 Phillips head screw driver. Tighten the screws in the sequence that is shown in Figure 2.
    Start with the inner four screws. Thread the inner four screws half-way using the sequence that is shown. Once all four screws are threaded, then fully tighten them. Next, tighten the outer four screws by using the sequence that is shown. Take care to not damage the system backplane with the screw driver tip.
    Figure 2. Replacing the GPU assembly into GPU socket
    Replacing the GPU and heat sink into GPU socket
  5. Place a new TIM on each of the aluminum heat covers of each GPU, for the cold plate that you are replacing. See Figure 3 for the orientation.
    The part number is 00E5133.
    Figure 3. TIM orientation
    TIM orientation
  6. Replace the GPU cold plate.
    1. Unhook the cold plate (A) from the service hook (B) and carefully align the cold plate on 2 or 3 GPUs.
      See Figure 4.
      Figure 4. Aligning the cold plate on the GPUs
      Aligning the cold plate on the GPUs
    2. Beginning with the middle GPU, swing the retainer over the GPU and code plate, then tighten the cold plate retainer screw as shown in Figure 5.
      Repeat this step for each of the remaining GPUs.
      Figure 5. Secure the cold plate retainer screw
      Secure the cold plate retainer screw
    3. Return the service hook to its latched position on the bracket.
  7. Replace the air baffles you removed.
  8. Place the protective covers on the bottom of the replaced GPUs.
    This protects the pins when returning the GPU.

What to do next

Prepare the system for operation. For instructions, see Preparing the 8335-GTC, 8335-GTG, 8335-GTH, 8335-GTW, or 8335-GTX system for operation after you remove and replace internal parts.