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Limits of PSU

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August 13, 2012 1:13:05 PM

Hello,

I am finalising off my build, and i wanted to know the best GFX and cooler I could get for my system. The rest of my parts are:

Asus Sabertooth 990FX
Corsair Vengeance RAM 2x4GB DDR3 1600MHz Low Profile
AMD Phenom II X4 965 Black Edition
Corsair 500W CXV2 PSU
Corsair Carbide 300R case

I was wondering if I could get away with something like a 6850 on that PSU. Also, what good CPU coolers could I get for under £30? Do I have any remaining watts to go for H2O?

More about : limits psu

August 13, 2012 1:18:35 PM

That PSU will definitely limit the build as im pretty sure it isnt even 80+. (havent read anything on it.) Id go for a Seasonic S12II 520W, it shouldnt cost much more, and it will run a 6850 good. A good cooler would be a CoolerMaster Hyper 212+ for under 30. :) 
August 13, 2012 1:21:36 PM

It's definately 80+ certified, if that helps
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August 13, 2012 1:25:11 PM

What about going for something like a 7770 instead? Would that help? Any good Nvidia cards I should look at?
August 13, 2012 1:27:51 PM

a 7850 as nw333 suggested is another option. uses about 100w at full load
August 13, 2012 1:28:31 PM

The 7770 is an ok card, it also consumes MUCH less power. A good nVidia card is the 560 or 560 Ti, if you can fit it in the budget. ( btw, if you can afford a 7850, it beats the 560 Ti. It will also consume less power.)
August 13, 2012 1:28:38 PM

the psu wont deliver 500w. it doesnt supply enough wattage on the 12v rail. at most 408w.

personally i would have gotten a intel system but ok.

you can still fit a 6850 no problem.


for the cpu cooler, get this. its better than most single 120mm radiators
http://www.scan.co.uk/products/coolermaster-hyper-212-e...
August 13, 2012 1:29:11 PM

CX series is pretty reliable and cheap. Phenom II X4 965 max TDP is nearly as high as 3960X so 500W might not be enought unless you use some low TDP graphics card like HD 7770.
August 13, 2012 1:30:04 PM

At that price range AMD rules. You can also look at used 6950. You can get one for around $160 on ebay. If you end up upgrading your PSU get 650W or higher. Stick with Corsair, Antec or Seasonic.(always remember less load on your PSU = longer life and less heat)
August 13, 2012 1:30:57 PM

So here is the new build:

Asus Sabertooth 990FX
Corsair Vengeance RAM 2x4GB DDR3 1600MHz Low Profile
AMD Phenom II X4 965 Black Edition
Corsair 500W CXV2 PSU
Corsair Carbide 300R case (contains 2 120mm fans)
Radeon 7770
CoolerMaster Hyper 212+

Will that run OK?

Also, will running on water use less or more power?
August 13, 2012 1:36:27 PM

snorri788 said:
So here is the new build:

Asus Sabertooth 990FX
Corsair Vengeance RAM 2x4GB DDR3 1600MHz Low Profile
AMD Phenom II X4 965 Black Edition
Corsair 500W CXV2 PSU
Corsair Carbide 300R case (contains 2 120mm fans)
Radeon 7770
CoolerMaster Hyper 212+

Will that run OK?

Also, will running on water use less or more power?


why would you want to run water cooling on a budget build? not to mention that you need something like a h80 to take advantage of water cooling anyways.

it uses about the same. a bit more actually given you have to run a pump but its very minimal
August 13, 2012 1:44:39 PM

The main reason for going with water is decreased noise.

It's a semi-budget build. Components like the motherboard, case, cooler, and RAM are an investment and I will be adding to this system over the years rather than doing a total rebuild. the AM3 socket looks to be active for the next few years and having extra pcie 16 slots means that in 2 years time i can add more gfx grunt with a new PSU and gfx and put the other psu in my server box. Plus I might also be running a lot of VMs on this so I need more cores and memory.
August 13, 2012 1:50:15 PM

cheap watercooling makes more noise (espically corsair h60 with stock fans)

the hyper 212 is pretty quiet. if you need more silence, you can use a voltage reducer.
August 13, 2012 1:53:45 PM

TheBigTroll said:
cheap watercooling makes more noise (espically corsair h60 with stock fans)

the hyper 212 is pretty quiet. if you need more silence, you can use a voltage reducer.


Ok, in that that case I'll stick to the 212
August 13, 2012 2:09:29 PM

If you want a silent computer, with a silent case.
August 13, 2012 2:14:29 PM

silent cases include the fractal define r3/r4 and the corsair 550D. other silent cases i dont really like recommending
August 13, 2012 2:19:37 PM

Going from memory. The CX500 is an 80+ PSU. Not 80+ bronze or anything like that, just 80+. And yes, it can only output 408 or 432W on the 12V rail. It doesn't use DC to DC like the newer PSUs so it can't output all 500W on the 12V. That being said its still a good budget PSU and can easily handle the 6850 + 9x5. The 9x5 is a 125W CPU (assuming you don't have a 95W version.) 125W CPU + 130W 6850 + 50W rest of system is just over 300W. You are only around 75% of the 400W+ total output of the CX500 so you are fine.

I have the 212+ on my computer at home. I barely hear it. My GPU fans are louder. Try to get the 212evo if you can but if you have to get the 212+ then don't worry about it. I'd avoid those "water cooler" like the H80 and the like. Pretty much water cooling in name only.
August 13, 2012 2:30:01 PM

4745454b said:
Going from memory. The CX500 is an 80+ PSU. Not 80+ bronze or anything like that, just 80+. And yes, it can only output 408 or 432W on the 12V rail. It doesn't use DC to DC like the newer PSUs so it can't output all 500W on the 12V. That being said its still a good budget PSU and can easily handle the 6850 + 9x5. The 9x5 is a 125W CPU (assuming you don't have a 95W version.) 125W CPU + 130W 6850 + 50W rest of system is just over 300W. You are only around 75% of the 400W+ total output of the CX500 so you are fine.

I have the 212+ on my computer at home. I barely hear it. My GPU fans are louder. Try to get the 212evo if you can but if you have to get the 212+ then don't worry about it. I'd avoid those "water cooler" like the H80 and the like. Pretty much water cooling in name only.


Wow thanks for the great comprehensive advice - it's why I come here!

I will be putting a DVD drive in the system for loading OS and software, but once that is done I may unplug it which will reduce the draw slightly.

Does anyone know how the 300R rates as a case? I really like the design and have been reading good reviews but it would be nice to hear what it would be like to live with. I looked at the other cases that were recommended in this thread but I don't want to spend more than £60 on a case. Plus nothing I have seen looks as good as the 300R (in my eyes anyway).

Here is another question: which wins on POWER and PERFORMANCE: the 6850 or 7770?

August 13, 2012 2:36:13 PM

7770 wins on power. 6850 is around 130W, I don't think the 7770 even crosses 100W. (think its rated around 80W.) As for performance the 6850 is slightly faster, but not really noticeable. You'll need to have FRAPS on to see the differences. Given the choice I'd probably take the cheapest one, or the 7770 seeing as it will be around longer.
August 13, 2012 2:38:46 PM

4745454b said:
7770 wins on power. 6850 is around 130W, I don't think the 7770 even crosses 100W. (think its rated around 80W.) As for performance the 6850 is slightly faster, but not really noticeable. You'll need to have FRAPS on to see the differences. Given the choice I'd probably take the cheapest one, or the 7770 seeing as it will be around longer.


Great! Thanks for that - the 7770 wins!

How about shutting it up? Any steps I could take to quieten it or is it pretty shush?

Is there anywhere else I could make power gains? What about a different CPU?
August 13, 2012 2:45:39 PM

Don't know much about noise. I have my parts in an Antec 300 case with the 212+. Its even in my room so I sleep with it. When gaming I have headphones on so noises from my PC don't bother me. Sleep with music from it so again I can't hear the fans. I want performance, I don't pay attention at all to noise. Plenty of sites out there for quiet computing. I'd start here.

http://www.silentpcreview.com/
August 13, 2012 2:46:43 PM

Ok. any power to be gained from a different CPU? how about using bulldozer?
August 13, 2012 4:25:02 PM

using bulldozer will bulldoze over your power supply.
August 13, 2012 5:55:09 PM

You have a 965. I'd keep that.
August 14, 2012 7:44:18 AM

Are there many/any power gains to be had by removing the stock fans in the case and replacing them with better ones? What about SSD vs HDD?
August 14, 2012 8:24:02 AM

Also, could I get away with a 7970?
August 15, 2012 7:45:57 AM

Ok, thanks for everyone's advice :)  I hope to either build this system (or upgrade my old one) sometime soon.
!