Question PSU Requirement for i9 12th Gen and RTX 3080 12GB ?

[Gamefreaknet]

Currently I have a PC build (not yet bought) with a i9 12th Gen and am currently looking at having a 3080 paired with the CPU however would an 850 watt PSU be enough to power a build with this?

(The list is currently private however I can duplicate it as a Public build)
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Component		Selection	Base	Promo	Shipping	Tax	Price	Where
CPU		i9 12900K					£569.97
CPU Cooler		Deepcool GAMMAXX L240 V2 69.34 CFM Liquid CPU Cooler	£62.99		FREE		£62.99	Buy
Thermal Compound		Thermal Grizzly Kryonaut 1 g Thermal Paste	£5.89			£5.89	Buy
Motherboard		Asus ROG STRIX B660-G GAMING WIFI Micro ATX LGA1700 Motherboard	£222.29				£222.29	Buy
Memory		2x Patriot Viper Steel RGB DDR4 1x 32GB 3600Mhz Module					£210.00
Storage		ADATA XPG SPECTRIX S40G RGB 256 GB M.2-2280 NVME Solid State Drive	£37.39		£1.99		£39.38	Buy
Storage		Samsung 870 Evo 2 TB 2.5" Solid State Drive	£168.00				£168.00	Buy
Video Card		MSI GeForce RTX 3080 12GB LHR 12 GB GAMING Z TRIO Video Card	£799.99		£9.90		£809.89	Buy
Case		MSI MAG FORGE 100R ATX Mid Tower Case	£42.99		FREE		£42.99	Buy
Power Supply		Corsair RM (2021) 850 W 80+ Gold Certified Fully Modular ATX Power Supply	£95.99		FREE		£95.99	Buy
Operating System		Microsoft Windows 11 Pro OEM 64-bit	£124.04			£124.04	Buy
Wired Network Adapter		Asus XG-C100C 10 Gb/s Ethernet PCIe x4 Network Adapter	£99.59		£24.17		£123.76	Buy
Wireless Network Adapter		Gigabyte GC-WBAX200 802.11a/b/g/n/ac/ax PCIe x1 Wi-Fi Adapter	£45.99		FREE		£45.99	Buy
Monitor		ViewSonic VX2718-2KPC-mhd 27" QHD Curved Monitor					£164.99

 

[Ralston18]

Start here:

https://www.tomshardware.com/reviews/best-psus,4229.html

Try the listed power calculators and then do your own manual calculation,

Look for a consensus on the wattage recommendation.

 

[Zerk2012]

Currently I have a PC build (not yet bought) with a i9 12th Gen and am currently looking at having a 3080 paired with the CPU however would an 850 watt PSU be enough to power a build with this?

(The list is currently private however I can duplicate it as a Public build)

Component		Selection	Base	Promo	Shipping	Tax	Price	Where
CPU		i9 12900K					£569.97
CPU Cooler		Deepcool GAMMAXX L240 V2 69.34 CFM Liquid CPU Cooler	£62.99		FREE		£62.99	Buy
Thermal Compound		Thermal Grizzly Kryonaut 1 g Thermal Paste	£5.89			£5.89	Buy
Motherboard		Asus ROG STRIX B660-G GAMING WIFI Micro ATX LGA1700 Motherboard	£222.29				£222.29	Buy
Memory		2x Patriot Viper Steel RGB DDR4 1x 32GB 3600Mhz Module					£210.00
Storage		ADATA XPG SPECTRIX S40G RGB 256 GB M.2-2280 NVME Solid State Drive	£37.39		£1.99		£39.38	Buy
Storage		Samsung 870 Evo 2 TB 2.5" Solid State Drive	£168.00				£168.00	Buy
Video Card		MSI GeForce RTX 3080 12GB LHR 12 GB GAMING Z TRIO Video Card	£799.99		£9.90		£809.89	Buy
Case		MSI MAG FORGE 100R ATX Mid Tower Case	£42.99		FREE		£42.99	Buy
Power Supply		Corsair RM (2021) 850 W 80+ Gold Certified Fully Modular ATX Power Supply	£95.99		FREE		£95.99	Buy
Operating System		Microsoft Windows 11 Pro OEM 64-bit	£124.04			£124.04	Buy
Wired Network Adapter		Asus XG-C100C 10 Gb/s Ethernet PCIe x4 Network Adapter	£99.59		£24.17		£123.76	Buy
Wireless Network Adapter		Gigabyte GC-WBAX200 802.11a/b/g/n/ac/ax PCIe x1 Wi-Fi Adapter	£45.99		FREE		£45.99	Buy
Monitor		ViewSonic VX2718-2KPC-mhd 27" QHD Curved Monitor					£164.99

850 watts should be fine but that PSU only comes with 2 PCI-E cables (much rather see 3) your buying WIFI adapter when the board comes with WIFI, no need for the extra thermal paste and that cooler is not going to cool that processor very good.

Why even bother with the expensive DDR5 memory and if you do buy it get it in a matched set as in one package of 2 not 2 individual sticks.

The motherboard don't even have room for everything your using.

In general just a bad build (nothing personal) might be better off stating what it will be used for and your budget.

 

[Why_Me]

Currently I have a PC build (not yet bought) with a i9 12th Gen and am currently looking at having a 3080 paired with the CPU however would an 850 watt PSU be enough to power a build with this?

(The list is currently private however I can duplicate it as a Public build)

Component		Selection	Base	Promo	Shipping	Tax	Price	Where
CPU		i9 12900K					£569.97
CPU Cooler		Deepcool GAMMAXX L240 V2 69.34 CFM Liquid CPU Cooler	£62.99		FREE		£62.99	Buy
Thermal Compound		Thermal Grizzly Kryonaut 1 g Thermal Paste	£5.89			£5.89	Buy
Motherboard		Asus ROG STRIX B660-G GAMING WIFI Micro ATX LGA1700 Motherboard	£222.29				£222.29	Buy
Memory		2x Patriot Viper Steel RGB DDR4 1x 32GB 3600Mhz Module					£210.00
Storage		ADATA XPG SPECTRIX S40G RGB 256 GB M.2-2280 NVME Solid State Drive	£37.39		£1.99		£39.38	Buy
Storage		Samsung 870 Evo 2 TB 2.5" Solid State Drive	£168.00				£168.00	Buy
Video Card		MSI GeForce RTX 3080 12GB LHR 12 GB GAMING Z TRIO Video Card	£799.99		£9.90		£809.89	Buy
Case		MSI MAG FORGE 100R ATX Mid Tower Case	£42.99		FREE		£42.99	Buy
Power Supply		Corsair RM (2021) 850 W 80+ Gold Certified Fully Modular ATX Power Supply	£95.99		FREE		£95.99	Buy
Operating System		Microsoft Windows 11 Pro OEM 64-bit	£124.04			£124.04	Buy
Wired Network Adapter		Asus XG-C100C 10 Gb/s Ethernet PCIe x4 Network Adapter	£99.59		£24.17		£123.76	Buy
Wireless Network Adapter		Gigabyte GC-WBAX200 802.11a/b/g/n/ac/ax PCIe x1 Wi-Fi Adapter	£45.99		FREE		£45.99	Buy
Monitor		ViewSonic VX2718-2KPC-mhd 27" QHD Curved Monitor					£164.99

If the primary use of your build will be gaming then you're doing it wrong. The B660 chipset only has 12 PCIe lanes and will gimp a second M.2 SSD. You are spending too much money on that power hungry heat producing cpu and you've shorted yourself on your case and monitor not to mention that RAM is meant to run in dual channel as in a set of two sticks.

For a single M.2 SSD then look at this board.

https://www.amazon.co.uk/dp/B09NTPHRG7
MSI MAG Intel B660M MORTAR DDR4 £146.62

https://www.msi.com/Motherboard/MAG-B660M-MORTAR-DDR4

For dual M.2 SSD's then this board.

https://www.currys.co.uk/products/gigabyte-z690-gaming-x-ddr4-lga1700-motherboard-10233083.html
Gigabyte Z690 GAMING X DDR4 £187.00

https://www.gigabyte.com/Motherboard/Z690-GAMING-X-DDR4-rev-10

https://www.amazon.co.uk/dp/B07ZPLM1R1
Corsair Vengeance LPX DDR4 3600MHz 32GB (2x16GB) £112.99

This is the cpu you want. Now find a real PC case instead of that MSi.

https://www.aria.co.uk/Products/Com...Core+Alder+Lake+CPU/Processor?productId=74047
Intel Core i7 12700F £319.99

https://ark.intel.com/content/www/u...2700f-processor-25m-cache-up-to-4-90-ghz.html

 

[Gamefreaknet]

If the primary use of your build will be gaming then you're doing it wrong. The B660 chipset only has 12 PCIe lanes and will gimp a second M.2 SSD. You are spending too much money on that power hungry heat producing cpu and you've shorted yourself on your case and monitor not to mention that RAM is meant to run in dual channel as in a set of two sticks.

For a single M.2 SSD then look at this board.

https://www.amazon.co.uk/dp/B09NTPHRG7
MSI MAG Intel B660M MORTAR DDR4 £146.62

https://www.msi.com/Motherboard/MAG-B660M-MORTAR-DDR4

For dual M.2 SSD's then this board.

https://www.currys.co.uk/products/gigabyte-z690-gaming-x-ddr4-lga1700-motherboard-10233083.html
Gigabyte Z690 GAMING X DDR4 £187.00

https://www.gigabyte.com/Motherboard/Z690-GAMING-X-DDR4-rev-10

https://www.amazon.co.uk/dp/B07ZPLM1R1
Corsair Vengeance LPX DDR4 3600MHz 32GB (2x16GB) £112.99

This is the cpu you want. Now find a real PC case instead of that MSi.

https://www.aria.co.uk/Products/Components/Processors/Intel+CPUs/Core+i7+-+S1700+Alder+Lake/Intel+Core+i7+12700F+12+Core+Alder+Lake+CPU/Processor?productId=74047
Intel Core i7 12700F £319.99

https://ark.intel.com/content/www/u...2700f-processor-25m-cache-up-to-4-90-ghz.html

The Memory is a custom link (not on PCpartpicker: Here
I am getting the i9 12th Gen over the i7 since I play some pretty heavy games (currently on an i7 8th gen and CPU usage is pretty damn high. (I do stuff like Cyberpunk and Shadow of the tomb raider). Regarding the memory I'm planning for it to be Windows installed on the 256GB and the 2TB solely for main storage.

 

[egda23]

It seems to me that you just picked the best CPU and GPU available because of your impression that your current 8th gen i7 is maxed out.
But you never stated the resolution and frequency at which you play now.
If you use a relatively low resolution, as FHD, any descent GPU will always be able to put that image on screen, but the CPU will struggle to produce as many frames as possible, even going flat out and reaching 100%.
Once you increase your monitor resolution you tranfer the burden to the GPU, as much that a high end GPU will be able to produce something as 60 fps at 4k, but you only need a mid-range CPU to produce that number of frames.

So the real question is what resolution do you plan to use with your new monitor and the 3080 ?
That will very much decide what CPU you need. Ther are plenty of tests on the Internet and many people here who could help you.
Do some research on this topic

 

[Why_Me]

The Memory is a custom link (not on PCpartpicker: Here
I am getting the i9 12th Gen over the i7 since I play some pretty heavy games (currently on an i7 8th gen and CPU usage is pretty damn high. (I do stuff like Cyberpunk and Shadow of the tomb raider). Regarding the memory I'm planning for it to be Windows installed on the 256GB and the 2TB solely for main storage.

You have a DDR5 board paired up with a link to 64GB of DDR4 RAM. Unless you plan on becoming a professional video editor 64GB for a gaming build is a bit over the top to put it mildly. A set of 2x16GB is more than enough for a gaming build. As far as the 12900K vs 12700F, that i9 gets you four more frames per second w/ Cyberpunk and a whopping one more frame per second w/ Shadow of the Tomb Raider while using over 100+ more watts. That cpu is not only power hungry but it requires a board with a beefy VRM design.

https://www.box.co.uk/MAG-B660M-MOR...B660M-MORTAR-WIFI-DDR4-Motherboa_4107910.html
MSI MAG B660M MORTAR WIFI DDR4 £167.97

https://www.msi.com/Motherboard/MAG-B660M-MORTAR-WIFI-DDR4

https://www.amazon.co.uk/MSI-MORTAR-Micro-ATX-Gaming-Motherboard/dp/B09NVZ9GWJ
MSI MAG B660M MORTAR WIFI DDR5 £204.81

https://www.msi.com/Motherboard/MAG-B660M-MORTAR-WIFI

See the review here.

https://www.techspot.com/review/2391-intel-core-i7-12700/

i7 12700 / 12700F gaming benchmarks.

 

[Karadjgne]

No tangible benefits of the i9-12900k over the i7-12700k for gaming use, it honestly only applies to benchmarks as no games can saturate the current amount of available P-cores.

That AIO isn't enough cooling capacity to handle the i9 if it gets pushed. You'll constantly be running high temps for no reason, simply because of the cpu output wattage, if anything you could possibly see thermal throttling if using the i9, actually dropping fps and output performance as boost algorithms suffer.

Running a 3080 with i7 at 1440p (QHD) will get you roughly the same results as with an i9 and 3080.

RM850 with i7 will have more headroom and run cooler and within specs with the 3080 than i9.

You'll have serious issues cooling an i9-12900k in that msi 100r case, it's not exactly brilliant for airflow, which with a 3080 and i9-12900k is a priority, especially combined with a cut-rate 240mm AIO.

You'd honestly be better off with a Ryzen 5900x platform or Intel i7-12700k, the 12900k was a disaster from the start and really not worth the money and consequent thermal issues for gaming.

 

[Phaaze88]

You'll constantly be running high temps for no reason, simply because of the cpu output wattage...

Not just from that, but the ILM mounting mechanism isn't appropriate for the large cpu.

Spoiler

View: https://www.youtube.com/watch?v=Ysb25vsNBQI

^Pressure mapping showing that the lopsided contact pressure isn't helping.

The double arm mechanism seen on X-series should've been used. It would've made the motherboards more expensive, but that would've been a worthwhile tradeoff, I'd imagine...

 

[Karadjgne]

Der8aur and Thermal Grizzly have a good solution, a screw down anodized aluminum bracket that takes the place of the ILM. Holds the cpu far more securely and does not warp the pcb.

 

[Why_Me]

Der8aur and Thermal Grizzly have a good solution, a screw down anodized aluminum bracket that takes the place of the ILM. Holds the cpu far more securely and does not warp the pcb.

https://www.ebay.co.uk/itm/334450741448
Thermalright LGA1700-BCF 12th CPU Bending Corrector Frame

View: https://www.youtube.com/watch?v=nSPKwTT9GEc