RTX 3090

[skysurfer 76]

Greetings. 

I have an opportunity to get RTX3090 soon and I am wondering if my current build will be able to handle it. I read that this card may produce too much heat etc. 

I also read that ASUS Srix is the best one, MSI Gaming X trio and ASUS TUF follow. 

Cooler Master Cosmos Chassis
i9-9900K 3.6 GHz
Gigabyte Z390 AORUS Master
EVGA FTW3 ULTRA GeForce RTX 2080 Ti 11GB
CORSAIR RM850x
G.SKILL TridentZ 32GB (4 x 8GB) DDR4 4000 (PC4 32000) 
CORSAIR H115i PRO Liquid
Samsung 50" Q80T QLED 4K TV

Thanks for looking. 

[polosim 841]

Graphic card and processor will work great together on 2160p/4K resolution.

 

https://pc-builds.com/calculator/Core_i9-9900K/GeForce_RTX_3090/0RM176lu/32/100/

[skysurfer 76]

So looks  like I may need to upgrade RAM as well. It says 64GB is recommended. 

[fppilot 4,360]

From what I read a couple of weeks ago would the 850 PSU be more of an issue with the 3090 and that much RAM?

[skysurfer 76]

Sounds like I may need the whole new build to run 3090 :) 

[kdfw__ 542]

ram is sufficient.  processor at stock speed is a waste.  3090 should improve performance a bit.

[Bob Scott 7,720]

Who is recommending 64GB?  I rarely even get above the 16GB mark, much less find myself needing more than 32.  I wouldn't bother with more RAM until the day comes that you actually need it.

I agree that an 850W PSU is getting close to the ragged edge when running a 3090 hard.  I routinely see ~750W on the power meter with mine when the GPU is running close to 100%.

You should have sufficient CPU cooling to easily overclock that 9900K to 5.0 GHz on all cores.  I got my 9900K to 5.0 GHz on air with an NH-D15 in my portable rig with little effort.

I don't regret upgrading from the 2080Ti to the 3090 a bit.  But the one change I think would be wise if you go there is to move up to a quality 1000W+ PSU.  The overclock is a free performance bump...OK, not free, you've already paid for it, but are currently leaving it on the table.

[skysurfer 76]

Appreciate all replies. 

Bob. Based on the link from the first reply it says it is recommended 64GB RAM to run 3090. I was actually surprised.

"NVIDIA GeForce RTX 3090 will need at least 64GB of RAM to work well. If you are planning to work with some memory intense programs, or run multiple programs at ones, you should consider adding even more memory."

I will then start working on new PSU as suggested. I do not have good experience doing OC. Those who built my PC said they were able to achieve like 3.9 GHz. I may need either educate myself or find someone who can do it safely. 

Thanks again  

[skysurfer 76]

Also, any recommendations on PSU to fit into my current build? 

[Bob Scott 7,720]

I don't buy the 64GB RAM recommendation.  Might be that some applications need buttloads of RAM with the 3090 (think crypto mining), but flight sims aren't among them, at least not yet.

Your CPU will boost to ~4.7GHz stock out of the box, but without at least some overclocking adjustments it will throttle back to somewhat below that if the power exceeds TDP for a prolonged period.  If your guys said they couldn't get it above 3.9 GHz, you need to seek a second and competent opinion.

I've been using EVGA Platinum PSUs in most of my latest builds, although the 9900K+1080Ti portable I built has the same Corsair RM850x that you are using.  I haven't looked lately, but 1000W PSUs were pretty scarce the last time I did, maybe 6 months ago.  Just beware of the Gigabyte supplies, there's a bad batch of them in the retail pipeline that are failing catastrophically at very high rates.

 

[ajaybala 66]

your current set up is similar to mine. I have msi 3090 gaming x trio running in my sys with i9 9900k. No issues except i had to upgrade my ups to a minimum 1500 VA (850 W). Keep that in mind.

Edited August 23, 2021 by ajaybala

[skysurfer 76]

23 minutes ago, ajaybala said:

your current set up is similar to mine. I have msi 3090 gaming x trio running in my sys with i9 9900k. No issues except i had to upgrade my ups to a minimum 1500 VA (850 W). Keep that in mind.

Ok, thanks for the advice. 

[skysurfer 76]

Thank you Rob. 
I have found 3 EVGA CPUs. What am I specifically looking in specs besides wattage? 

 https://www.evga.com/products/Compare.aspx

[skysurfer 76]

5 hours ago, Rob_Ainscough said:

You are looking for:

• Efficiency Rating (80+ Bronze, Silver, Gold, Platinum, Titanium)
• Rated Power 600W-1600W

EVGA 850 P2 80+ Platinum is about the lowest I would go with your current hardware set (and it's on sale).

The EVGA 1300 P+ 80+ Platinum is the one I would buy for your peak loads of 671W (estimated) ... and given the cost of the 3090's it deserves a quality PSU 🙂

Cheers, Rob.

So if I go with 1600W either of these should work too?

EVGA SuperNOVA 1600 T2, 80+ TITANIUM 1600W
EVGA SuperNOVA 1600 P2, 80+ PLATINUM 1600W
EVGA SuperNOVA 1600 G2, 80+ GOLD 1600W
EVGA SuperNOVA 1600 G+, 80+ GOLD 1600W

Thanks again 

[skysurfer 76]

16 hours ago, Rob_Ainscough said:

All the PSU's I registered have a 10 year warranty.  All the PSU's you listed above have a 10 year warranty.  And no, I'm not affiliated with EVGA in any way, shape, or form.  I've just had great success with their PSUs.

Cheers, Rob.

 

Thanks for the advice. I did some research, EVGA is indeed is a good one.