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Windows 7: Buying a GTX680, will the rest of my system be a bottleneck?

27 Sep 2012   #1

Windows 7 Home Premium 64bit OEM
Buying a GTX680, will the rest of my system be a bottleneck?


I am considering the purchase of a "Gigabyte GTX680 SOC 2gb" video card (Link) but I am starting to wonder whether the rest of my system's components should be upgraded first. I am thinking that they may be too much of a performance bottleneck to warrant the purchase of the new card.

I currently have:
  • i5 760 - overclocked to 3.4 ghz
  • 8gb DDR3 1333 MHz RAM, probably will buy some 2133 MHz when I get the card
  • 750W TP-750 Antec PSU
  • GA-P55-USB3 motherboard, with two x16 GPU slots (one operates at x4 when in crossfire/sli though)
  • HAF-X case

I am sort of asking two things.

Firstly, will my PSU even provide enough current to run the card? The card requires "a minimum 12V current rating of 38A" yet I cannot find the current that my PSU can supply. It does however have "4 +12V output circuits", whatever that means. Where can I find the maximum current that it supplies?

Secondly, assuming my PSU is up to the task, will the rest of my system be too much of a bottleneck to even benefit from a faster graphics card? I currently have an HD6870 and will buying a faster card be that much noticeable with the system that I currently have? Or should I spend the money on upgrading the rest of the system first?

EDIT: Link
This person has a similar setup - same PSU and essentially same CPU - and his seems to work fine. Maybe the PSU is ok!

Thanks for any help,

My System SpecsSystem Spec
27 Sep 2012   #2

Windows 7 Pro X64 SP1

Is this your manual?

It specifies 25A on each of its four +12V rails, but with a total not to exceed 62A. (It's more than you need for a single GTX 680.)

I guess that the I5-760 ought to be adequate. 8GB of DDR3-1333 ought to be fine too. Going to DD3-2133 may be a waste, but a relatively inexpensive waste.
My System SpecsSystem Spec
01 Oct 2012   #3

Windows 7 Enterprise 64 Bit


Your PSU should be absolutely fine with the 680, since the requirement for most of the 600 series is 600W. May i recommend the EVGA GTX 670 FTW or ASUS 670 DirectCU II? They give almost the same performance of the 680, and yet cost around $100 less. They also may require less Power from your Supply Unit. Of course, if money is no object go for the 680.

Your 760 should be fine with the 680, especially if it is overclocked!
My System SpecsSystem Spec


 Buying a GTX680, will the rest of my system be a bottleneck?

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