Will my CPU Bottle neck a GTX 780

ryanbuckz99 · Mar 2, 2015

Hi guys i just manage to pick up a very nice deal on a gtx 780 Poseidon model. im running a gtx 760 at the moment but i want to know if my cpu will bottleneck the monster GTX 780. and if my psu will be up to it.

PC SPECS

CPU: AMD A8-5600K 3.6GHz Quad-Core Processor

CPU Cooler: Corsair H55 57.0 CFM Liquid CPU Cooler

Motherboard: MSI A88XM-E35 Micro ATX FM2+ Motherboard

Memory: Corsair XMS3 4GB (1 x 4GB) DDR3-1600

Memory: Crucial Ballistix Sport 4GB (1 x 4GB) DDR3-1600 Memory

Storage: Kingston SSDNow V300 Series 120GB

Storage: Western Digital Caviar Blue 500GB

Video Card: MSI GeForce GTX 760 2GB TWIN FROZR

PSU: Corsair CX500 80+ plus Bronze

many thanks in advanced

LucoTF · Mar 2, 2015

The A8 isn't power hungry and your PSU has the required 8 pin connectors, it's close but you should be ok. An uppgrade to a better quality PSU wouldn't be a bad idea though when you can

Yes it will bottleneck in cpu intensive games or sections of games, but you should still have a plenty enjoyable gaming experience imo

ryanbuckz99 · Mar 2, 2015

LucoTF :

ok do you think that the bottle neck will stop me from seeing the improvement from the gtx 760 to 780 or will i still see a boost in fps

Novuake · Mar 2, 2015

Its probably bottle necking as is, you also have a RAM limitation.
Your power supply is pretty close to what I would say is too much load... A GTX780 could be too much for it.

But hell, put it in and see how much of a performance increase you get.

LucoTF · Mar 2, 2015

Novuake :

He listed two 4gb sticks separately. I missed it at first too

One thing I didn't ask you op, have you got that a8 @ 4.5ghz+?

Novuake · Mar 2, 2015

LucoTF :

Oh yeah you are right about the memory.

But I wouldn't stress that CX PSU... Those things scare me.

LucoTF · Mar 2, 2015

Actually running the numbers OP is in serious danger of overloading if he's overclocking, especially gpu overclocking.

ryanbuckz99 · Mar 2, 2015

LucoTF :

no the apu aint overclocked at all my mobo aint good enough to overclock only a55 chip set i had a a88x board but it died. and the reason for different ram stick only had 4gb and i picked up another 4gb stick cheap one day second hand.

i dont overclock my gpu anymore had one die and never again overclocking never goes well for me i have learned that lol

LucoTF · Mar 2, 2015

ryanbuckz99 :

Ah, you said you had an A88x

ryanbuckz99 :

Novuake is right, running it at stock speeds you're likely already getting some bottleneck situations with your gtx 760. I wouldn't buy another A88x board though, better to try and change socket rather than invest further in overclocking your A8

ryanbuckz99 · Mar 2, 2015

LucoTF :

ryanbuckz99 :

Ah, you said you had an A88x

ryanbuckz99 :

Novuake is right, running it at stock speeds you're likely already getting some bottleneck situations with your gtx 760. I wouldn't buy another A88x board though, better to try and change socket rather than invest further in overclocking your A8

would some thing like a i3 or low end i5 the 4460 i5 is pretty cheap is it any good as far a an i5 and any advice on mobo. also is there any amd cpu that would be good pair to the 780

LucoTF · Mar 2, 2015

Any of i5-4440 / 4460 / 4570 / 4590 would be perfect for your gtx 780, and the asrock h97 pro4 is going pretty cheap these days

As for power supply, the xfx 550w would be enough I think

ryanbuckz99 · Mar 2, 2015

LucoTF :

ok cheers for your help im going to look at the prices of the i5 and the mobo i have a old cm psu that is 550w but not 80+ would that be any good maybe run the 780 on its own psu can it been done.

DubbleClick · Mar 2, 2015

If the cx 500 really has an output of 500w that's more than enough. An I5 4460 and a b85 board will have like a power draw of 90w maximum together. 20w for 2 hdds, a dvd reader and what not is 110w. That leaves 390w for the gpu, which it won't even ever come close to consuming. You'll most likely see 300w being drawn in performance intensive games, 350w while stress testing both cpu and gpu.

LucoTF · Mar 2, 2015

ryanbuckz99 :

That FSP power supply actually has less power available for your GPU and CPU than the CX, despite the higher total wattage. And I wouldn't run a dual PSU setup because you won't get proper voltage regulation.

Are you based in the US?

ryanbuckz99 · Mar 2, 2015

LucoTF :

ryanbuckz99 :

That FSP power supply actually has less power available for your GPU and CPU than the CX, despite the higher total wattage. And I wouldn't run a dual PSU setup because you won't get proper voltage regulation.

Are you based in the US?

nope the uk

LucoTF · Mar 2, 2015

As I said before your CX500 is cutting it close but you should be ok. The gtx 780 has a tdp of 275w but in real world tests it's more like 250w, and your A8 has a tdp of 100w but with the on-die GPU turned off it's probably closer to 80w. I think it'll run, but I'd be looking at a short to mid term PSU upgrade to something more solid that's all. The XFX 550w is roughly the same price as a CX500 but much better quality

Novuake · Mar 2, 2015

LucoTF :

Just seconding.

Seems like a solid plan.

Will my CPU Bottle neck a GTX 780

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