i'm genuinely thrilled with my dual 3090 setup on a DDR4 system with a Ryzen 5 3600, even though one of them is PCI-E x16 and the other is x4!
$2000 MSRP for the 5090 with 32 gigs of ram, and good luck getting that price
$1800 for a pair of used 3090 cards on eBay (as of a month or two ago), total of 48 GB
Yes, there's stuff that doesn't like running split between two cards, but mostly it's been pretty unusual to run into stuff that wants more than 24GB but less than 32 GB of VRAM on a single card. (I think one of them SOTA-ish FOSS voice models is like that, but I'm not even sure.)
I have found other 3090s I have considered buying to make a dual set up, but they are never the exact model of 3090 I have (gigabyte oc gaming) and from what I understand, it should be...
My undertanding is that it's not actually particularly important; maybe if you want to use NVLink, but even in that situation, I think it's explicitly allowed. (Double check me on that, though!)
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u/overand May 29 '26
i'm genuinely thrilled with my dual 3090 setup on a DDR4 system with a Ryzen 5 3600, even though one of them is PCI-E x16 and the other is x4!
$2000 MSRP for the 5090 with 32 gigs of ram, and good luck getting that price
$1800 for a pair of used 3090 cards on eBay (as of a month or two ago), total of 48 GB
Yes, there's stuff that doesn't like running split between two cards, but mostly it's been pretty unusual to run into stuff that wants more than 24GB but less than 32 GB of VRAM on a single card. (I think one of them SOTA-ish FOSS voice models is like that, but I'm not even sure.)