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Problems with my new build AMD gaming machine :-( - Page 3

post #21 of 29
Quote:
Originally Posted by MrPhoenix View Post

No i have no idea. Sorry.
but I do like to think of the future and maybe I will get a good deal on a FX - 9370 down the line or a couple of R9 295x in a couple of years.
So that said i could prob stretch budget alittle if needed thumb.gif
Or maybe none of that makes a difference, this is why I am here. I will learn more from this forum rather than from reading pages and pages of info. It is just how I am built. I am an AMD human I am afraid. If I was an Intel human I would be telling you lot where you going wrong.
I really do appreciate all the help guys thumb.gif

If you want room to go nuts with everything you want you are looking at around 1000 watts, But you cant find that many good 1000 watts units around 100£. You are looking at 150-160£ then
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Seravee
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post #22 of 29
Quote:
Originally Posted by shilka View Post


How did i just know you where go to say that lucky for you i had it ready

http://www.techpowerup.com/reviews/Seasonic/G550/9.html
http://www.techpowerup.com/reviews/SuperFlower/SF-750F14MG/9.html

Seasonic G has about twice as high ripple on the 12v rail, And the EVGA SuperNova G2 is based on the Leadex so its the same unit nothing is changed on the G2, So the Leadex is vaild to use in comparing

 

damm that is low ripple even puts my mighty hcg 750m to shame

the money pit
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the money pit
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post #23 of 29
Its actually the lowest ripple of any unit i have ever seen, Maybe besides the Corsair AXi which its neck and neck with but is waaaaaay cheaper then the AXi
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Seravee
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post #24 of 29
Thread Starter 
If you want room to go nuts????
Then give it to me straight. What am I looking at?
post #25 of 29
Quote:
Originally Posted by MrPhoenix View Post

If you want room to go nuts????
Then give it to me straight. What am I looking at?

1000 to 1600 watts watts but that depends on how many video cards and so on. As i said but that is going to set you at least 150-160£ if not 200£ back, But really are you ever going to have more then two video cards or overvolt them? if you are not going to do either then you dont need more then a 750 or 850 watts
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Seravee
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post #26 of 29
Thread Starter 
Right then I guess I am there then.
My problem is caused by having the wrong type of PSU and I need to buy one of the sugested 850w.
Thank you all very much and I will be in touch when I am ready to start purchasing parts for my water loop.
Its been a pleasure as my first ever forum experiance cheers biggrin.gif
Kind Regards
Phoenix
post #27 of 29
Quote:
Originally Posted by MrPhoenix View Post

Right then I guess I am there then.
My problem is caused by having the wrong type of PSU and I need to buy one of the sugested 850w.
Thank you all very much and I will be in touch when I am ready to start purchasing parts for my water loop.
Its been a pleasure as my first ever forum experiance cheers biggrin.gif
Kind Regards
Phoenix

Even 750 watts is more then enough you dont need to spend extra on a 850 watts, You can if you want too but its not really required
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Seravee
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post #28 of 29
If you're putting the HD7970s under water and want to exploit what water can do with them, then you should set aside at least 350W per GPU in your PSU sizing.

If you're going to put the FX-8350 and possibly the motherboard VRMs and NB under custom water as well, and want to exploit the crosshair motherboards full potencial for overclocking the FX-8350, then you should set aside at least 350W for the CPU+VRMs in your PSU sizing.

For 2xHD7970 That's 1050W + system fans, pumps, drives, southbridge, ram, NIC, sound, controllers, connected devices, etc etc.

Peak power consumption could be well over 1100W under something like a Furmark+P95 stress test in such a system. Many 1KW PSUs could handle this, but whether or not you want to be over the rated power or not is up to you. I'd recommend getting the biggest highest quality PSU you can. A good PSU will cost less than a pair of GPU water blocks in many cases so I don't see why this should be a part of the system that is given a tight budget. If you can afford a custom water loop then you can afford a PSU big enough to make it worthwhile. If you can't afford the monster PSU then you probably can't afford custom water anyway so it's all sort of pointless. One without the other isn't really the "whole package" if you know what I mean.

https://www.youtube.com/watch?v=cap1fr1bwws

In the video above, P95+Furmark is run on an FX-8350@4.2GHZ@1.425V under an AIO CLC + HD7970 (which appears to be on air, no mention of overclocking on the GPU is made).

Given the voltage and clock speed provided in the video above I would calculate that the CPU is running ~160W , which is ~200W including VRM losses. Meanwhile the GPU should be dumping ~250W at stock clocks on a furmark or GPGPU type stress test. so CPU+GPU=450W, add drives/fans/motherboard/ram etc and its ~500W+. With an 85% efficient PSU, that's ~600W from the wall. In the video 595W is measured from the wall.

Start overclocking the CPU and GPUs and the power consumption increases significantly. I recommend the EVGA SuperNova G2 1.3KW for ~£160
Edited by mdocod - 4/13/14 at 7:41pm
     
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post #29 of 29
Thread Starter 
Thanks Mdod
I like all your points apart from the money attitude. People can save and just because we cant go out and get something instantly does not mean we will not eventually get one. WHERE THERE IS A WILL THERE IS A WAY. I can not afford the £250 or so I am going to need for water loop but I bet I have one within a month or so.
But in this case I think my budget will stretch to one of these if you really feel it is necassary.
Kind Regards
Paul
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