Question Upgrade RTX 2070S 8GB to RTX 4070S 16GB??

[martinlest]

The gut response will be 'of course!', but this is not my 'area of expertise' these days, and I'd appreciate some input before I start spending the cash...

My relevant PC specs are:

Intel i9-11900KF @ 3.5GHz / CORSAIR 650W CS Series PSU / Corsair H100i AIO cooler / nVidia RTX 2070 Super 8GB / 64GB DDR4 RAM / TUF Gaming Z590-PLUS MB

My concerns are (1) whether I (or someone else, probably!) will be able to replace the RTX 2070 with the RTX 4070 on that M/B with no issues. (the PCIe 3.0/4.0 interface for instance?). And of course the 2070 has two fans, the 4070 three. I have a standard tower case, and I am assuming there should be enough room, but... Also (2), would I need to upgrade the PSU too? I monitor power usage and it's rarely above 400W total, but even so? How would I recognise that the PSU is struggling to cope?

I know that any definitive answer is not possible, given you can't see the PC! But at least it'd be good to know that there are no M/B compatibility issues. Thanks for any ideas you may have on this.

(The PC is used almost 100% for X-Plane flightsimming, with Quest 2 VR, BTW).

 

[Lutfij]

CORSAIR 650W CS Series PSU
Is this the PSU you're currently working with?
https://www.corsair.com/ww/en/p/psu...watt-80-plus-gold-certified-psu-cp-9020077-na
How old is the unit?

PCIe 4.0 devices are backwards compatible with PCIe 3.0 slots, you will lose out on some performance bandwidth wise.

 

[John Chesterfield]

Yes, but with a power supply upgrade. The CS is not one to connect expensive hardware to.

 

[Eximo]

I would think a Z590 with a 11th gen would support PCIe 4.0 anyway. Z490 boards would be more suspect.

4070 Super (12GB) or 4070 TI Super (16GB)?

Agreed. CX650 would be marginal with a 4070 Super and should be replaced, not enough for a 4070 Ti Super and must be replaced.

Chassis will list maximum GPU length, and you can always measure the available room before purchasing a longer video card.

 

[martinlest]

Thanks for the comments - I am looking at the 16GB VRAM BTW.

What would be a good PSU to go with that spec then? Plenty to choose from. I was reckoning 850W would be about right?

 

[--SID--]

Corsair CS-M is about 10 years old, at least. It came with only 3 years of warranty for a reason. You have to replace it. Get one of the top 10 of this list https://hwbusters.com/wp-content/uploads/2024/07/perf_230V-1.png

source: https://hwbusters.com/best_picks/best-atxv3-pcie5-ready-psus-picks-hardware-busters/4/

 

[martinlest]

Yes, I know it's old (probably dates from around the time I joined this forum! ), but it has given no problems at any stage with the current spec. I will have to replace it if I go with the new GPU though, I know. Been looking at:

Cooler Master MWE 850 Gold V2​

 

[John Chesterfield]

While that particular one isn't the worst, I tend to avoid Coolermaster power supplies.

Go for a Corsair RM850 or something similar.

 

[martinlest]

I'll see what I can find on Amazon etc.

Why do you avoid Coolmaster?

 

[Eximo]

The one you picked out is actually decent. But is on the lower end of 850W Gold units. For the money, Superflower Leadex III, MSI MAG A850GL, be quiet! Pure Power 12, Seasonic units, Thermaltake Toughpower GX3 (The GF1 is to be avoided is my understanding)

The rest of CoolerMaster's line up isn't that well regarded. Seems to be the way they like it, one or two high end model and the rest sub-standard.

 

[martinlest]

Fair enough. The Corsair RM850 is easily obtainable, so will doubtless go with that (if I decide to go ahead with the GPU upgrade!).