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7820X or 7900X?

M

Mr.Nosmo

n00b
Joined
Dec 30, 2012
Messages
14
Hi Guy's!

I'm finally building a new PC, as the one I have now if getting really old - It's a x58 based i980X w/24GB RAM & TriSLI GTX580's.
For the new build I'm not sure if I should get a 7820X or a 7900X - I don't need the extra 2 cores, but I might need the extra PCIe-lanes... I'm going to use it for office-app's, HVEC/x.265 Encoding and 4K-gaming (currently I'm 3x 1920x1200-monitors, but getting LG's 3840x1600 monitor), so the question is:
Do I need the extra PCIe-lanes to go 2x1080ti or will one 1080ti be enough? Do I need to go SLI or will a single card be enough? I can understand that SLI (and Xfire) is on the way out, but how real it it & will it be a big issue?
I have been looking at the numbers and see that the price-diff on the CPU's is about the same as the the price-diff on 1080ti vs Titan Xp and the TitanXP only give you about 8% more. The same price-diff on the CPU's will get me about 66% of a 2. 1080ti, but do I need the extra PCIe-lanes to go SLI or will the 7820X be enough?
In other words: Should I get:

1) Asrock X299 Pro Gaming i9 w/7820X & 1x1080ti + 3x NVM SSD's
2) Asrock X299 Pro Gaming i9 w/7820X & 1xTitanXp + 3xNVM SSD's (+€450,-)
3) Asrock X299 Pro Gaming i9 w/7820X & 2x1080ti + 3x NVM SSD's (+€850,-)
4) Asrock X299 Pro Gaming i9 w/7900X & 2x1080ti + 3x NVM SSD's (+€1250,-)

To me it looks like I won't have enough PCIe lanes for the SSD's if I get the 7820X & 2x 1080ti (option 3)...?

I don't want to buy bragging rights, but real useful performance, like if you buy a Tesla S-P100DL+ instead of a Ferrari F12, because you never drive over 100mph, but still want to be the fastest 0-60mph (I'm sure you get my point)...

The build will be overclocked as much as possible & water-cooled (I'll ask for help on the water part in another thread)...

Any helpful input is welcome!
 
The 7820X will do what you need just fine and I would not recommend SLI or Crossfire to anyone, just not worth the hassle and support for SLI and Corssfire is weak anymore. Even if you go SLI at 8x 8x you will notice almost no difference with someone at 16x 16x, within the margin of error. So my vote would be number 1, that will be more then enough and you can see what Volta and Navi have to offer next year.
 
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