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Which GPU for triple 3440x1440 monitor setup?

Botmeister

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He guys. I recently bought three LG UltraGear 34GN850-B monitors. Haven't received them yet unfortunately. I am currently running a MSI 2080ti and thinking of upgrading to the 30x series. Now, I have seen some benchmarks between the 3080ti and the 3090 and they are very close to each other in terms of FPS performance on a single screen setup (up until 4k). The regular 3080 is not a candidate.

Would I benefit from the 3090 over the 3080ti? Three times 3440 x 1440 pixels. I mostly play ACC. I haven't seen any comparisons between the 2 cards on a multiscreen setup, preferrably also on ACC. Because the 3080ti was released just recently. VRAM is 12GB on the 3080ti and 24GB on the 3090. If anyone has experience on a similar setup I would love to hear what you think.

For those who'd like to know the complete package: i7 9700K, 2 x 16GB at 3200,
M2 NVME storage. I will most likely upgrade RAM to eg. 3800mhz.

Thanks beforehand!! Regards.
 
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stigs2cousin

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Linus Tech Tipps has a video on 3080ti versus 3090, seems only productivity will profit from 24gb ram.:


And yes, the driving games where not tested on a triple setup.
Such a comparison should be hard to find since the cards are new and scarce.
( not to mention f......g expensive)

MFG Carsten
 
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The 3090 will not be noticeably faster than a 3080ti in-game. At best a few percent difference might be seen if you run benchmarks, but that's it.

Don't bother upgrading the RAM in an Intel system either. That also won't make a noticeable difference in-game (AMD CPUs do benefit from fast ram, though).

I have a 2080ti too. It's pretty good, but for triple ultra-wides I think the 3080ti is the logical upgrade. However, I'd recommend not feeding the scalpers, and waiting until the GPU market settles back to earth.
 

BillyBobSenna

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He guys. I recently bought three LG UltraGear 34GN850-B monitors. Haven't received them yet unfortunately. I am currently running a MSI 2080ti and thinking of upgrading to the 30x series. Now, I have seen some benchmarks between the 3080ti and the 3090 and they are very close to each other in terms of FPS performance on a single screen setup (up until 4k). The regular 3080 is not a candidate.

Would I benefit from the 3090 over the 3080ti? Three times 3440 x 1440 pixels. I mostly play ACC. I haven't seen any comparisons between the 2 cards on a multiscreen setup, preferrably also on ACC. Because the 3080ti was released just recently. VRAM is 12GB on the 3080ti and 24GB on the 3090. If anyone has experience on a similar setup I would love to hear what you think.

For those who'd like to know the complete package: i7 9700K, 2 x 16GB at 3200,
M2 NVME storage. I will most likely upgrade RAM to eg. 3800mhz.

Thanks beforehand!! Regards.
Why is the non-TI 3080 not a candidate?
 
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3080ti should not be under consideration - you want the 3090's 24gb of VRAM to hold the textures and data necessary for the number of pixels you are trying to drive. Even with a 3090 you will still be dialing settings down trying to generate 2.13 billion pixels per second.
 
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RasmusP

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To end the vram debate, here are the GPU stats when doing a quick race, 20 AI, 20 cars visible, all settings to high, then maximum, clear weather, Nurburgring, starting last, resolution set to 5958x2494, then 6880x2880 via 3.00x/4.00x DSR on my 3440x1440 monitor and my RTX 3080.
Triple 3440x1440 = 14.869.800 pixels
3x DSR 5958x2494 = 14.859.252 pixels
4x DSR 6880x2880 = 19.814.400 pixels

GPU load in both runs: consistently 99%!
The run with high settings resulted in 60-80 fps and about 8 GB vram usage. The run with everything on max and 4x dsr resulted in about 40 fps and maxed out vram at above 10 GB usage.

So apart from the fact, that even a 3090 won't give great fps, the 12 GB vram on the 3080 ti should be definitely enough for ACC in that resolution!

Also keep in mind that this is only what was ALLOCATED. Not what's actually NEEDED!

To check for frametimes going crazy when hitting the vram limit, I took some screenshots for you:
Sadly afterburner doesn't have the nicest graphs for presentation purposes...

The massive spikes are whenever I went into or out of the menus etc.
The steady graphs are the 2x 1 lap.

Overall screenshot:
1625232363825.png


High settings:
1625232217191.png


Max settings:
1625232320891.png


Yes, the frame times are more spikey, however the fps are really bad too and the spikes aren't happening at the end, where the maximum vram usage occurs.


So in my opinion, the 3080 ti with 12 GB vram is totally fine for that resolution!
Especially since the game looks pretty much identical with a few settings reduced to "high".
 
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Thank you for the ACC specific test. Not sure the degree to which upsampling/DSR vs. native affects things. Know we're not talking 8k resolutions; however, triple 1440 widescreen is equivalent to running twin 4k displays.


 
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RasmusP

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Not sure the degree to which upsampling/DSR vs. native affects things.
It should be exactly the same as the game doesn't know that it's DSR.
Triple screen should only cause a bit higher cpu load than dsr.
The down scaling filter of dsr shouldn't affect performance at all afaik.

About your benchmarks at 8k:
Well at 10 fps, I wouldn't call it "relevant" to spend multiple hundreds more.
When you lower the settings to reach playable fps, you probably drop the vram enough to be below 12 GB again.

Ofc nobody knows, but I highly doubt it...

Reminds me of the outcry about the gtx 970 only having true 3.5 GB vram, when any title that used more than that was running at unplayable fps anyway at these settings.
 
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