F5F Stay Refreshed Hardware Desktop Need assistance with your XFX Speedster MERC319 Radeon RX 6800XT at 3.3V? Let me know how I can help!

Need assistance with your XFX Speedster MERC319 Radeon RX 6800XT at 3.3V? Let me know how I can help!

Need assistance with your XFX Speedster MERC319 Radeon RX 6800XT at 3.3V? Let me know how I can help!

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Respeur
Junior Member
3
09-04-2025, 04:04 AM
#1
You’ve got a used GPU with LEDs but no fan operation. The seller offered a refund because it was non-functional, and you’re checking if repairs are possible. Your multimeter detected a short on the +3.3V PCIe rail—this is critical. No schematics available, but the video guides usually stop early when a short is found. You’ve shared reference images; please include them. Need advice on fixing this issue or assessing whether it’s salvageable. Thanks!
R
Respeur
09-04-2025, 04:04 AM #1

You’ve got a used GPU with LEDs but no fan operation. The seller offered a refund because it was non-functional, and you’re checking if repairs are possible. Your multimeter detected a short on the +3.3V PCIe rail—this is critical. No schematics available, but the video guides usually stop early when a short is found. You’ve shared reference images; please include them. Need advice on fixing this issue or assessing whether it’s salvageable. Thanks!

D
DuelMond
Junior Member
4
09-04-2025, 04:04 AM
#2
The short is located near the +3.3V PCIe rail, close to its connector area.
D
DuelMond
09-04-2025, 04:04 AM #2

The short is located near the +3.3V PCIe rail, close to its connector area.

W
Winkler1212
Member
172
09-04-2025, 04:04 AM
#3
It seems you're unsure about the readings from your multimeter. The beeping when testing the +3.3V pads suggests there might be an issue with the connections or the circuit. Double-check the wiring and ensure the probes are properly inserted.
W
Winkler1212
09-04-2025, 04:04 AM #3

It seems you're unsure about the readings from your multimeter. The beeping when testing the +3.3V pads suggests there might be an issue with the connections or the circuit. Double-check the wiring and ensure the probes are properly inserted.

L
LBLoLBros
Junior Member
32
09-04-2025, 04:04 AM
#4
Yes, I have a digital thermal camera that warms up when turned on.
L
LBLoLBros
09-04-2025, 04:04 AM #4

Yes, I have a digital thermal camera that warms up when turned on.

I
I_Like_To_Pvp
Junior Member
26
09-04-2025, 04:04 AM
#5
That's a great suggestion, I'll give it a shot tomorrow.
I
I_Like_To_Pvp
09-04-2025, 04:04 AM #5

That's a great suggestion, I'll give it a shot tomorrow.

B
Bryceconner62
Member
57
09-04-2025, 04:04 AM
#6
You're right, this area seems to be a problem. Here are some suggestions you could try:
- Check for loose connections or damaged components.
- Ensure proper ventilation and cooling.
- Inspect for any signs of wear or corrosion.
- Consult the manual for specific troubleshooting steps.
Let me know if you want more detailed advice!
B
Bryceconner62
09-04-2025, 04:04 AM #6

You're right, this area seems to be a problem. Here are some suggestions you could try:
- Check for loose connections or damaged components.
- Ensure proper ventilation and cooling.
- Inspect for any signs of wear or corrosion.
- Consult the manual for specific troubleshooting steps.
Let me know if you want more detailed advice!

R
raroman07
Member
107
09-04-2025, 04:04 AM
#7
Next, we need to identify the component and find a suitable substitute. I’ll start with some research.
R
raroman07
09-04-2025, 04:04 AM #7

Next, we need to identify the component and find a suitable substitute. I’ll start with some research.

E
epicallee
Member
119
09-04-2025, 04:04 AM
#8
I'm the best in the game.
E
epicallee
09-04-2025, 04:04 AM #8

I'm the best in the game.

N
Nitro_PT
Member
182
09-04-2025, 04:04 AM
#9
The thermal image overlay might be slightly misaligned. It appears to correspond to the IC identified as U304. Use a digital multimeter to test both the capacitor and resistor, checking for shorts or unusual behavior.
N
Nitro_PT
09-04-2025, 04:04 AM #9

The thermal image overlay might be slightly misaligned. It appears to correspond to the IC identified as U304. Use a digital multimeter to test both the capacitor and resistor, checking for shorts or unusual behavior.

B
Brittany_Love
Member
118
09-04-2025, 04:04 AM
#10
Yes, there are numbers and letters on U304.
B
Brittany_Love
09-04-2025, 04:04 AM #10

Yes, there are numbers and letters on U304.

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