Can my Intel I5 7400 use the full performance of two GTX 1080 TI

Jul 28, 2018
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I am wanting to build a gaming PC and I need to know if my I5 7400 can use both the GTX 1080 TI Full performance for both before I buy or do I need to upgrade ???
 
Solution
Do you even have a motherboard that supports SLI? For the i5 7400 only certain Z170 and Z270 boards have SLI support. As said above, SLI isn't really worth it anymore, very few games support it these days. Even if game support was better, the i5 7400 is too slow to really benefit outside of maybe 4K resolution or higher. On the older LGA 1151 platform only the i7 6700k and 7700k would come close to not being a bottleneck, and that's assuming you don't hit PCI-E bandwidth limitations, some people who have tried SLI 1080Tis on mainstream Intel problems have run into that problem as an x8 x8 configuration apparently doesn't provide enough bandwidth, meaning you'd have to look at something like X299 or X399 to get around that problem.
I think a better question as of now would be why you need two 1080 Ti's? What are the specs of the monitor you're using? The 7400 will definitely bottleneck the two at some point, but again, it really depends on what panel you're using. There will always be a bottleneck in your system, regardless of how good your hardware is.
 

dragonstar914

Proper
Jun 24, 2018
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A 7400 will definitely bottleneck a 1080 ti by at minimum 30% just on clock speed and IPC alone. The fact that it's only a 4 thread CPU will hurt FPS further in many games. My 4790k bottlenecks my 1080 ti by at least 5-10% vs a 8700k and my 4790k can run circles around your 7400.
 
I wouldn’t use a 7400 with a single 1080Ti let alone sli 1080Ti’s. Quad cores are entry level now and the 7400 is not a particularly strong quad core. The 1080Ti is a the best gaming gpu, you are mixing components on opposite ends of the performance spectrum so will have a very unbalanced system.
 


You would be better off using one GTX 1080Ti and using that money you saved not buying the 2nd one to upgrade the MB, CPU and RAM.

SLI is a waste these days for the most part, and will become irrelevant in the near future.
 

TJ Hooker

Titan
Ambassador
As said above, don't bother with SLI.

If you're playing at 4K/ultra settings in modern AAA games, an i5 7400 probably wouldn't bottleneck too badly except in CPU heavy games. In less graphically demanding scenarios (e.g. lower resolutions/settings, older games, etc.) there would likely be a pretty decent bottleneck.
 
Do you even have a motherboard that supports SLI? For the i5 7400 only certain Z170 and Z270 boards have SLI support. As said above, SLI isn't really worth it anymore, very few games support it these days. Even if game support was better, the i5 7400 is too slow to really benefit outside of maybe 4K resolution or higher. On the older LGA 1151 platform only the i7 6700k and 7700k would come close to not being a bottleneck, and that's assuming you don't hit PCI-E bandwidth limitations, some people who have tried SLI 1080Tis on mainstream Intel problems have run into that problem as an x8 x8 configuration apparently doesn't provide enough bandwidth, meaning you'd have to look at something like X299 or X399 to get around that problem.
 
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