Supermicro E3 boards and PCI-E power.

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Glock24

Active Member
May 13, 2019
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Some time ago I gave a friend a Supermicro X10SLL-F board with CPU and RAM, he used it as a desktop with a low power GPU (Radeon HD6450).

He recently installed an nVidia GTX 750Ti that has no additional power connectors and he says when he powered the computer on some traces on the motherboard went into smoke.

Now the board does not power on anymore.

I know this board has x8 electrical in x16 physical a slot, is that the reason this happened? I would've expected that if there's not enough power the GPU would just not work.

What's the usable PCI-E power on x2, x4 and x8 slots?
 
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RolloZ170

Well-Known Member
Apr 24, 2016
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Glock24 said:
What's the usable PCI-E power on x2, x4 and x8 slots?
Click to expand...
manual says PEG can be installed in any slot. 4pin JPW2 connected ? 24Pin(not only 20) ATX connector ?
bad GTX 750Ti shorting some connections ?
 
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i386

Well-Known Member
Mar 18, 2016
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Glock24 said:
What's the usable PCI-E power on x2, x4 and x8 slots?
Click to expand...
In the pcie specifications it's 25 watt for x1, x2, x4 and x8 pcie slots and 75watt for x16 slots:
1667924114832.png

BUT: mainboard vendors can implement ways to deliver more power and fry other devices...
Glock24 said:
He recently installed an nVidia GTX 750Ti that has no additional power connectors and he says when he powered the computer on some traces on the motherboard went into smoke.
Click to expand...
Every gpu starts in a low power modes (max 25 watt), if the pcie slot can provide more power or the gpu gets power directly from the psu it will change in "high power" mode
 
G

Glock24

Active Member
May 13, 2019
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i386 said:
Every gpu starts in a low power modes (max 25 watt), if the pcie slot can provide more power or the gpu gets power directly from the psu it will change in "high power" mode
Click to expand...
This is strange then, maybe defective GPU card? Or the board tried to supply more amps than it should.
 
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