Sign in with
Sign up | Sign in
Your question
Solved

Does my PSU cause fps drops?

Tags:
  • FPS
  • Graphics
Last response: in Graphics & Displays
Share
May 2, 2014 5:57:46 AM

Hi everyone..i own a very old system and last year i upgraded a little bit. I bought a second hand Q6600 G0, bought one asus 630 GT 1gb ddr5 and added 4gb of ram. I m mostly surfing and playing league of legends. I thought that this gpu is good enough to play this game at max resolution (17" 1280x1024) but the thing is that my psu is pretty cheap and i m afraid that it s not sufficient to deliver enough amps to gpu, causing fps drops. Here are the specs in detail:

Asrock P45DE
Intel Core 2 Quad Q6600-G0 2.4 Ghz (95W)
Asus 630GT 1gb DDR5 (65W if i am right)
4x2gb DDR2
1 HDD - WD Blue
2 optical drives
1 internal card reader
3 case fans+cpu cooler
Resolution 1280x1024
Windows 7 Ultimate x64

PSU specs: (all these specs are printed on the sticker)
Levicom 450W max
+12V -> 16A (single rail)
5&3.3V-> 270W (dont remember the exact amps delivered)
12&5&3.3V->430W

But if you do the math it doesnt make any sense. W=V*A so:
12V*16A=192W (12+5&3.3V=192+270=462W which is even higher than the max wattage that my psu delivers)

So the big question is, do i need a new psu?Does it cause the fps drops or it is just because the gpu is too low or it is something else?Just to mention that since the upgrade i had no issues like sudden shut downs etc

More about : psu fps drops

May 2, 2014 6:11:40 AM

PSU is either big enough or not, it does not affect performance but a too small one will affect stability!
m
0
l
May 2, 2014 6:15:59 AM

Ok - this is an interesting question. First - please know that a power supply is quite literally the life blood of your computer.

A good power supply provides sufficient clean power to the components of your computer. It is intended to provide various levels of regulated voltages to these components within a very tight range of tollerance.

Now - the power demands for your various components can be calculated either at the nominal power draw or the maximum power draw. Let's assume that they are the maximum just for argument sake.

Doing your math - if everything was on and fully active - I.E. burning a CD while reading from the other CD, looking at files from the caard reader, defraging your hard drive, and playing the most complicated game you have - you might actually stress out your system and be demanding the full 462 W you are listing above. Chances are you have never gotten to that level of multitasking.

Now lets talk about the size and quality of your PSU. As a general rule - I like to have some head room in my power supply rateing so that I don't get into the situation you find yourself in. As it stands - you are likely above 90% of the total output of your PSU all the time. That does not sound like a winning strategy - especially since the brand of your PSU is not even on a fairly well know tier of PSUs : http://community.newegg.com/eggxpert/computer_hardware/...

Please read that thread for additional insight into power supplies and consider a Tier 2 or higher PSU with at least 550W - and you will not have to be concerned with a safe, predictable, and reliable power supply.

Good luck.
m
0
l
Related resources
May 2, 2014 6:28:55 AM

That build will use well under 450W. I calculated your specs on eXtreme Power Supply Calculator and only got 257W. If you've exceeded the capacity of the PSU, I don't think it would just reduce the performance of your machine anyway. I'm pretty sure it would just shut down or crash instead.

Can you isolate what causes your FPS drop? Logically, it should happen during large teamfights when there are a lot of champions and ability animations happening at the same time. The first thing I would do is just try lowering your graphics settings in League to see if that fixes the problem.

If I were to take a guess, I would say that your GPU isn't powerful enough. Since Season 4 started, I noticed my FPS dropping slightly below 60 on occasion (with a GTX 770). I think they are just using higher resolution textures, maybe new particle effects, etc.
m
0
l
May 2, 2014 6:33:38 AM

Yes i know that my psu is rather bad and i m tending to buy a Corsair CX600M. So you are saying that fps drops are not related to my psu. Would my cpu bottleneck a gpu like GTX 650, provided that i buy a new psu?
m
0
l
May 2, 2014 6:34:35 AM

It should be fine with a GTX650 even GTX650Ti.
m
0
l
May 2, 2014 6:39:54 AM

TheAshigaru said:
That build will use well under 450W. I calculated your specs on eXtreme Power Supply Calculator and only got 257W.


As far as i am concerned the total watts a psu delivers is not as important as the amps. Unfortunately my psu delivers only 16A at 12V..am i right?
m
0
l
May 2, 2014 6:43:47 AM

Yes you are correct it is basically an old design when more power was needed on 3.3 and 5 volts. Modern hardware calls for power on the +12 volts so modern PSU's have at least 80% of their total power available on the +12 volts and many over 90%.
m
0
l
May 2, 2014 6:58:12 AM

So first thing to do is buy a new psu and then gpu. Sorry for asking again it sounds strange to me that Q6600 at stock speed wont bottleneck a GTX 650Ti, even a little bit. No need for OC, perhaps at 3GHz?
m
0
l

Best solution

May 2, 2014 7:01:33 AM

Overclocking will help but without it will work but about the top card I would match with it.
Share
May 2, 2014 7:06:47 AM

Thank you all of your help. I really appreciate it
m
0
l
!