Intel 9900k + RTX 4090 on Corsair AX860?

[HumdrumPenguin]

Assuming I can get an RTX 4090 at MSRP, I want to upgrade to it from my current 2080 Ti. Before changing the PSU, I wanted to wait a bit for more options on models with the new ATX 3.0 standard.

 

As the title suggests, am I setting myself up to some trouble if I were to use an overclocked 9900k (4.7ghz on all cores done by the Asus wizard thingamajig) with a 4090? I would absolutely not overclock the 4090 until I upgrade the Corsair AX860 PSU (much less increase the power cap from 100%).

 

For total power consumption reference, the rest of the PC is:

4x8gb (32gb) RAM

Corsair AIO with a 360 rad.

3x 120 RGB fans (LL120)

1x 140 RGB fan (LL140)

3x non-RGB fans

1x M.2 SSD

 

My audio system is all external, so no power on that end coming from the PSU.

 

Thanks!

[Moonzy]

get it, and if you face insufficient power issues, then lower the power limit of the gpu until you can get a new psu in, no biggie

[jaslion]

The auto oc from asus just dumps a ton of voltage in the cpu often you can bring that back a lot decreasing power draw and heat output significantly.

 

As for will it work? Most likely not but you can try the ax860 is a high end psu and will just shut off when it's inadequate.

[HumdrumPenguin]

10 minutes ago, Moonzy said:

get it, and if you face insufficient power issues, then lower the power limit of the gpu until you can get a new psu in, no biggie

That's an option indeed. I could also remove the CPU overclock to bring the TDP of the 9900k back to 95W, which would give me another 100-150W of headroom.

9 minutes ago, jaslion said:

The auto oc from asus just dumps a ton of voltage in the cpu often you can bring that back a lot decreasing power draw and heat output significantly.

 

As for will it work? Most likely not but you can try the ax860 is a high end psu and will just shut off when it's inadequate.

I used to run all cores at 5.0, but at some point I had to increase the voltage every 3 months or so to keep it stable. I got tired of it and let the Strix mobo do the job for me. I'm actually curious to see the voltage it's using now... And good to know that the PC won't get damaged in case a power spike happens with my current PSU. I want to get an ATX 3.0 high end model with 1200W next, but there are very few options immediately available, and I like matching brands within the system to make it look better.

[Deadpool2onBlu-Ray]

2 hours ago, HumdrumPenguin said:

Assuming I can get an RTX 4090 at MSRP, I want to upgrade to it from my current 2080 Ti. Before changing the PSU, I wanted to wait a bit for more options on models with the new ATX 3.0 standard.

 

As the title suggests, am I setting myself up to some trouble if I were to use an overclocked 9900k (4.7ghz on all cores done by the Asus wizard thingamajig) with a 4090? I would absolutely not overclock the 4090 until I upgrade the Corsair AX860 PSU (much less increase the power cap from 100%).

 

For total power consumption reference, the rest of the PC is:

4x8gb (32gb) RAM

Corsair AIO with a 360 rad.

3x 120 RGB fans (LL120)

1x 140 RGB fan (LL140)

3x non-RGB fans

1x M.2 SSD

 

My audio system is all external, so no power on that end coming from the PSU.

 

Thanks!

A 9900k is going to MASSIVELY bottleneck a 4090 at 1440p and especially 1080p. I would personally get a used 3080 (still 40% faster than your 2080ti) and a full system redo for the same price. Either 5800x3d, 7700x, or 13600/13700k. 

[HumdrumPenguin]

45 minutes ago, CHICKSLAYA said:

A 9900k is going to MASSIVELY bottleneck a 4090 at 1440p and especially 1080p. I would personally get a used 3080 (still 40% faster than your 2080ti) and a full system redo for the same price. Either 5800x3d, 7700x, or 13600/13700k. 

I'm updating everything in my rig over the next months. The 4090 is just the start of the puzzle (and then the new PSU once what I'd like is made available). I also normally play demanding games on 4k ultra, not easy to drive stuff, so the 9900k won't be as much of a problem. I'm dead set on getting the 4090 

[xg32]

9 minutes ago, HumdrumPenguin said:

I'm updating everything in my rig over the next months. The 4090 is just the start of the puzzle (and then the new PSU once what I'd like is made available). I also normally play demanding games on 4k ultra, not easy to drive stuff, so the 9900k won't be as much of a problem. I'm dead set on getting the 4090 

the bottleneck will indeed be massive (guessing 35%~), but don't aim for last gen gpus cause of it, can always switch cpu later, it'll still be faster than a 3090

[HumdrumPenguin]

11 minutes ago, xg32 said:

the bottleneck will indeed be massive (guessing 35%~), but don't aim for last gen gpus cause of it, can always switch cpu later, it'll still be faster than a 3090

My current concern isn't the bottleneck. I'm aware of it, and all components in my rig will be updated soon enough to make that go away. What I needed to know for sure is that I wouldn't be calling the fire brigade if I tried running the 4090 on my AX860 PSU.

[xg32]

4 minutes ago, HumdrumPenguin said:

My current concern isn't the bottleneck. I'm aware of it, and all components in my rig will be updated soon enough to make that go away. What I needed to know for sure is that I wouldn't be calling the fire brigade if I tried running the 4090 on my AX860 PSU.

there are rumors that the transient spikes have been fixed on the 40 series, should be fine, or it just shuts down. Nothing is sure of course.

[Moonzy]

13 minutes ago, HumdrumPenguin said:

What I needed to know for sure is that I wouldn't be calling the fire brigade if I tried running the 4090 on my AX860 PSU.

no one can be 100% certain that your psu will shut down correctly
but, i would say it's fine, i myself tripped my PSU power limit way too many times with 30 series gpus

[HumdrumPenguin]

36 minutes ago, Moonzy said:

no one can be 100% certain that your psu will shut down correctly
but, i would say it's fine, i myself tripped my PSU power limit way too many times with 30 series gpus

550W on a 3080Ti is hardcore pushing the limits I must say. Wild achievement haha

[Moonzy]

5 minutes ago, HumdrumPenguin said:

550W on a 3080Ti is hardcore pushing the limits I must say. Wild achievement haha

oh i didnt trip this psu, i tripped my RM850x with 2x 3060ti and 2x 3080

[--SID--]

5 hours ago, HumdrumPenguin said:

What I needed to know for sure is that I wouldn't be calling the fire brigade if I tried running the 4090 on my AX860 PSU.

No, it just shut off. AX860 (Seasonic KM3 platform) even have issues with a RTX 3080.

[jaslion]

6 hours ago, CHICKSLAYA said:

A 9900k is going to MASSIVELY bottleneck a 4090 at 1440p and especially 1080p. I would personally get a used 3080 (still 40% faster than your 2080ti) and a full system redo for the same price. Either 5800x3d, 7700x, or 13600/13700k. 

Huh what? The 9900k is still a VERY strong cpu and depending on ops screen and games then dont need more performance.

 

That combined with that a lot of games are not made to go beyond 144fps means that the 9900k is a perfectly good cpu and it would be silly to upgrade it.

[jaslion]

5 hours ago, HumdrumPenguin said:

I'm updating everything in my rig over the next months. The 4090 is just the start of the puzzle (and then the new PSU once what I'd like is made available). I also normally play demanding games on 4k ultra, not easy to drive stuff, so the 9900k won't be as much of a problem. I'm dead set on getting the 4090 

Dont bother with upgrading it you wont need it. People are very triggerhappy saying bottleneck thid bottleneck that but really at 4k and 1440p a 9900k will simply put let that 4090 stretch its legs to the limits.

 

Yes in esports games you wont get the same hundreds of fps as a 13900k and at 1080p you will be held back but even a current 12900ks does that with thr current 3090ti because either the game isnt iptimized to go hundreds of fps high or it is so optimized that you get so many hundreds of fps the cpu cant keep up.

 

So basically dont worry all is fine