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GTX 780 SLI with 2500K @ 1440p: do I "need" new CPU?

post #1 of 25
Thread Starter 
Well, now that GTX 780 is almost as fast as TITAN for $650, I was seriously thinking of selling TITAN and going with GTX 780 SLI. I don't really see using all of Titan's 6GB on single 1440p, so its a waste for me really. The main question that bugs me:

Will my 4.6Ghz i5-2500K be enough to drive two 780s @ 1440p? I usually like to max out all of my games with high level of AA on top of that. I really don't want to upgrade CPU, if I would be bottlenecked, I'd rather stay with Titan then.

Thoughts?
post #2 of 25
Quote:
Originally Posted by DimmyK View Post

Well, now that GTX 780 is almost as fast as TITAN for $650, I was seriously thinking of selling TITAN and going with GTX 780 SLI. I don't really see using all of Titan's 6GB on single 1440p, so its a waste for me really. The main question that bugs me:

Will my 4.6Ghz i5-2500K be enough to drive two 780s @ 1440p? I usually like to max out all of my games with high level of AA on top of that. I really don't want to upgrade CPU, if I would be bottlenecked, I'd rather stay with Titan then.

Thoughts?

If anything bottlenecks them it would be the lack of PCI-E lanes on the Z77 chipset. The X79 Chipset has more PCI-E lanes.

However you should be fine.

Edit: My thoughts about the future with games ported from the PS4 and Xbox One is that they will want 8 cores because of the 8 Core Jaguars. Thus i7's might become more useful than i5's.
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post #3 of 25
Not unless you're playing a 1024x768 would you need a new CPU.

With just four cores/threads, the 2500k is still on par with the 8-core FX chips and newer Intel processor.

At your resolution, 1440p, you'll be fine with that CPU.
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post #4 of 25
SLI 780s are definitely worth spending a few more dollars over a single TITAN for 1440p.

SLI TITANs are kinda overkill for 1440p right now. But I don´t know what the future holds with frostbite 3, unreal engine 4, and all those upcoming next gen games.

Even so, SLI 780s would be my choice if the TITANs launched after, not before them.
Edited by Devnant - 5/24/13 at 11:19am
post #5 of 25
Quote:
Originally Posted by Devnant View Post

SLI 780s are definitely worth spending a few more dollar more for 1440p.

SLI TITANs are kinda overkill for 1440p. Don´t know what the future holds with frostbite 3, unreal engine 4, and all those upcoming next gen games, though.

But SLI 780s would be my choice if the TITANs launched after, not before them.


This: As stated UT4 ports will be designed to run on the 8 Core Jaguars. So if you upgrade your CPU do it in the future. IE 8-12 Months and snag a used i7 2600k
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post #6 of 25
2500k is still a good cpu...with that overclock sli 780's and 1440p should run fine.
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post #7 of 25
Thread Starter 
Oh, you guys are making it harder and harder not to give in to 780s smile.gif Thanks for replies though.
Quote:
Originally Posted by Shiftstealth View Post

If anything bottlenecks them it would be the lack of PCI-E lanes on the Z77 chipset. The X79 Chipset has more PCI-E lanes.

However you should be fine.

Edit: My thoughts about the future with games ported from the PS4 and Xbox One is that they will want 8 cores because of the 8 Core Jaguars. Thus i7's might become more useful than i5's.

I'm on Z68. I was under the impression that for 2 cards I should be fine with regards of # of lanes... Im not sure though, can you please elaborate? Thanks.
post #8 of 25
Quote:
Originally Posted by DimmyK View Post

Oh, you guys are making it harder and harder not to give in to 780s smile.gif Thanks for replies though.
I'm on Z68. I was under the impression that for 2 cards I should be fine with regards of # of lanes... Im not sure though, can you please elaborate? Thanks.

Yeah, Z68 i think has 16 Lanes. 8 per card. X79 has i think 48 lanes. IE enough for Triple SLi without limiting lanes. However 8X PCI-E 2.0 lanes will be fine.

People have reported a loss of 1-2 FPS over loss of PCI- E lanes but nothing big.
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post #9 of 25
Even if you want to run 3 cards, will be fine with a PLX chip, eh?
 
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post #10 of 25
Quote:
Originally Posted by CattleCorn View Post

Even if you want to run 3 cards, will be fine with a PLX chip, eh?

Probably.

However i'd feel bad for that Power Supply.
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