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2500k + 780

faceman123

faceman123

faceman123

Soldato
Joined
9 Jun 2011
Posts
3,646
Hi guys, i don't know if i've paid over the odds for the following pc ( for friends use ).

2500k
asus z77
8gb ddr vengancy
1tb hdd sata 3
benq xl 2420t 120hz monitor
8800gtx
650 80+ psu *cheap brand*

paid 300 quid for it all. ( not a member of members market yet!, so dont know if i've overpaid)

Graphics card makes my grandmother seem young. I want to run Sli 780's in it, would it bottleneck if i get it to 4.7ghz? whats the difference in bf4 between this and my 4770k?

Thanks
 
That is because the CPU is bottlenecking and more MHZ will not help.

Need an i7 to get most out of those 2 GPU's
 
Three hundred for that lot seems fair- chip, ram, mobo and monitor justify the price IMHO.

Overclock the little beastie with a decent cooler, and I would be inclined to disagree with jh30uk's post- the 2500K is still a very capable chip, and I doubt there would be any significant bottlenecking.
 
single card you wont notice any difference from i5 to i7 from sandy to haswell.

will run any singular card out now fine.

two cards ideally you want a i7
 
NoNameNoNumber said:
I was hitting FPS in the online benches I could find. If u was bottlenecked then the extra MGz if the CPU would've shown improvements I'd have thought???
Click to expand...

Yes, jh30uk seems confused. If your GPUs are running flat out, and a 10% increase in CPU clock make no difference, then it's pretty safe to say the CPU is NOT a limiting factor.
 
I have a 2500k at 4.6Ghz and a single GTX 780 at 1.2Ghz. The 2500k bottlenecks it in big CPU intensive games, Watchdogs is the biggest one I played. When playing that game I get 60+ fps most of the time on ultra settings but my CPU usage is 100% and the game stutters badly. Even on lower settings it still uses 90-100% and still stutters.

I will be saving some money and upgrading to the Devil Canyon i7 next month.
 
joeyjojo said:
Yes, jh30uk seems confused. If your GPUs are running flat out, and a 10% increase in CPU clock make no difference, then it's pretty safe to say the CPU is NOT a limiting factor.
Click to expand...

Its thread limitation not clock speed limitation. i7 is 8 threads vs an i5's 4, games capable of running on multiple GPUs will require more threads then an i5 can offer. The CPU runs out of grunt due to lack of threads, leaving the GPUs sat well below the 90%+ utilisation they require.

Jh30 is absolutely spot on with what he says.

Go run a pair of 780's with an i5 and an i7 on bf3/4, crysis 3 etc... And you'll notice the change in frame rate
 
pgi947 said:
Go run a pair of 780's with an i5 and an i7 on bf3/4, crysis 3 etc... And you'll notice the change in frame rate
Click to expand...

This, found this out with an i5 3570k at 4.5, switching to an i7 3770k even on a lower oc of 4.2 gave a very noticeable improvement. Cards were oc'd gtx 670's in sli.
 
Bleh, okay will it cap a 780ti?, 2560x1600.

Thanks for all the replies. I can't help but regret spending 300 quid on this machine now =\. Don't like to hear the word throttle.
 
Stick a single top tier card in (780/780ti/290/290x) and enjoy. Though at 1600p the bottleneck might not be as apparent as the GPUs will be working much harder.

Some games will be fine on the i5 with a pair of them but sooner or later you're going to want to sniff out an i7 replacement.
 
Yep, cpu use dropped a good deal too, 90% use on the i5. Gpu use increased as the max they reached was 80% usage.
 
I doubled MIN FPS going from a Q9650 to 2700k with same GTX 580.

I again doubled MIN FPS going from 2700k to 4770k with same GTX 680 4GB.

Does not matter if clocks were lower/same/higher the newer CPU gave better FPS overall but more so MIN FPS.
 
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