this post was submitted on 25 Dec 2023
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PC Master Race

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Out-of-touch old gamer looking for 3090-compatible components (lemmy.world)
submitted 10 months ago* (last edited 10 months ago) by PP_BOY_@lemmy.world to c/pcmasterrace@lemmy.world
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Title pretty much tells you all you need to know about my situation. In a turn of events tonight I've been gifted a used but working EVGA 3090 card to replace my seven year old 1070.

My current system hardware specs are:

CPU: AMD Ryzen 9 5900X 12-Core (upgraded from Ryzen 5 last year)

GPU: MSI 1070

MoBo: MSI MAG B550 TOMAHAWK

PSU - Corsair CX-550 550 Watt

x4 8GB Installed Memory

I also have a 2tb SSD drive with my OS and games installed, and 4 8tb HDD for media.

My main concern is with needing to replace my MoBo with a x3 PCi board and worries about my PSU not being powerful enough. I'm not particularly worried about my tower is a Phanteks Enthoo Pro PH-ES614PC_BK.

Thanks in advance!

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[–] CrazyLikeGollum@lemmy.world 6 points 10 months ago (1 children)

The motherboard is fine, unless you want some of the overclocking features there’s really no need to go above the b550 chipset for a Ryzen 5xxxx series.

That CPU will be excellent paired with a 3090.

You will need more RAM. At least 16GB in a dual channel kit, though 32GB would be better. Going beyond that would be kind of pointless at this point.

The PSU you would definitely need to upgrade. You’d need a minimum of 750W, but going with a 1000W PSU would give you some headroom for future upgrades for a pretty minimal price increase.

[–] PP_BOY_@lemmy.world 3 points 10 months ago (1 children)

Glad to see that the MoBo and CPU should pair without fault for the 3090. Truthfully I haven't refreshed myself on hardware jargon since I built my PC around 2018.

you will need more RAM

That was a complete typo on my part, I meant to put x4 8GB for 32GB total.

PSU was expected, upgrading to a GPU that maxes 350W on its own. Will probably be looking into a 1000W unit on your recommendation, just for future proofing

[–] CrazyLikeGollum@lemmy.world 3 points 10 months ago

As an additional note, if you’re comfortable doing so, I’d recommend going into the BIOS and undervolting the CPU down to 1.2 or 1.3 volts.

A common issue with the higher end Ryzen 5xxx CPUs is that they run a bit hot which prevents them from boosting clock speeds as high for as long as they’re able.

My last build very similar to yours, (3090, 5900x, 32GB RAM) and I was able to shave almost 10C off of the CPU temps by setting a CPU voltage offset of -0.15 volts.