Upgrades - 4080 super or 4070 & CPU

[MrMe]

Hi, I currently use a Lenovo Legion for VR Sim racing using the Quest 3:

• AMD Ryzen 7 5800H
• Nvidia RTX 3070
• 32gb DDR4

Unused PC is:
i7-8700K on Asus Prime Z390
(2x8)16GB DIMM DDR4 clocked @ 2666 MHz

Conundrum is to buy a 4080 super or a 4070(something) and upgrade the cpu. Would anyone have any thoughts on this? Instinct is to do the 4080 super with the current cpu, which should yield dramatic improvements for VR sim racing vs my laptop.

 

[PhigBill]

Why a 30 series and not a 40?

 

[MrMe]

You are correct, I did mean the 40 series, long day! (have edited the post)

 

[Tetras]

The laptop CPU is a fair bit stronger than an i7-8700K, but a 4070 Super or 4080 Super would be massively faster than a mobile 3070.

So, since you're playing VR sim racing, it would depend how much you're CPU versus GPU bottlenecked. If you're playing not very high-detail games @ 1080p, for example, then it might not show much improvement, but if you're playing demanding games at 4K, then the improvement would likely be very large, even with the slower CPU.

 

[MrMe]

Modified AC and AMS2, like to push the settings to max and get 90/120hz

 

[Tetras]

Modified AC and AMS2, like to push the settings to max and get 90/120hz

Assetto Corsa in Hardware Unboxed's results on YouTube shows huge gains from the 3D cache of X3D CPUs, so I wonder if that game is more likely to be CPU bottlenecked? I don't know about AMS2.

You might want to take a look at this recent video, since the question is sort of similar to yours:

Same Price, Faster GPU vs Faster CPU: 4070 Ti + 7600 or 4070 + 7800X3D?

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www.youtube.com

 

[MrMe]

very helpful thank you

 

[Craig_d1]

I'd go 4080 super only as gpu is most expensive part of the pc now. If you play at 4k, then it's the gpu which is the bottleneck....and at lower res, yes you'll see cpu bottleneck, but as you upgrade the system over times, the extra gpu performance will just keep increasing, and the future upgrade is cheaper doing the mobo/cpu/ram later than doing it all now and getting a lesser gpu, which will hold you back later, or require an upgrade sooner
my thinking...i mean a 7600/b650/32gb ram will set you back £450 down the line
the 4070ti super wont be an FE card ibelieve, so whereas the 4080 super will so being a fe card, the 4080 s/b cheaper in real terms than getting a 4070ti super, where you'll pay more for the privelege of an AIB card...
If you don't want to spend anymore money in the future on it, then i guess going other route will give a more balanced play....but I'm 4080 super route and update rest in 6 months when funds allow