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January 23rd, 2025 02:59
PCIe slot for new GPU on precision 5820
I am upgrading the GPU and trying to figure out which slot is best to use. Everything I read online says to use the top slot. But looking at the manual it seems slot 3 and 5 would be best?
mazzinia_
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January 23rd, 2025 09:29
Hello,
Slot 2 (pcie 16x) , aka the note number 5 in that picture
mazzinia_
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January 23rd, 2025 13:48
Technically should be ok, is the slot for the 2nd gpu or the quad nvme card. bandwidth is identical
Chino de Oro
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January 24th, 2025 17:14
mazzinia is spot on, see detailed engineering specifications for supported voltage, maximum wattage, and card dimensions.
Mogwai248
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January 23rd, 2025 13:05
Thank you! Do you think slot 4 would be ok (3 in the picture)? Could use the extra space if there isn’t a difference in bandwidth.
Mogwai248
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January 24th, 2025 21:25
@Chino de Oro
Great info thanks. I have it in slot 4 but it doesn’t seem to be performing well in benchmark tests like Superposition. Probably bottlenecked by the CPU.
Chino de Oro
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January 25th, 2025 02:50
If you are experiencing performance issue with graphics card on slot 4, go into BIOS settings and change PCIe bus allocation to option 2, which will increase more bus numbers to slot 4. If it does not improve your graphics performance, you can restore back to default value.
Review this article to know more about PCIe bus allocation https://www.dell.com/support/kbdoc/en-us/000146802/pcie-bus-allocation-in-dell-precision-5820-7820-7920-tower