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Silencer MK III 400w OR CX430v2

post #1 of 13
7/13/12 at 1:13pm
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i5-2500k + 5850:

Here's my sample build for him:
https://docs.google.com/spreadsheet/ccc?key=0Aoqm-6PvQW_OdEwzZ045aUJLTExGSnJ1dUJzbGs3MEE
This build is for the purpose of using some professional music editing software. He's one of the best guitarists I know and he has quite a bit of equipment so he'll be utilizing at least some/most of the CPU power thumb.gif when he encodes above FLAC quality. He would also game here or there, enough that I think a 5770/6770/7770 would suffice (hence my old 5850 going into the build)

I don't know his resolution for gaming but that's not really that important.

PSUCalc and my intuition says the 5850 is pushin' it. If it was a 6850 then yes but... yea. I know overload tests for the 430 exist on hardwaresecrets but I couldn't find any conclusive tests for the PC Power 400w.

Which would you guys recommend in terms of power supplies? My goal is to always keep power supplies down to $20 or $30AR if I can while still getting quality units tongue.gif
Other comments on the build?
Edited by FlashFir - 7/13/12 at 1:18pm
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post #2 of 13
7/19/12 at 10:25am
If you're intent on pinching pennies the CX430 is about the only option, but for a system like that (with the Radeon HD5850) it is worth spending $60 on a quality unit (especially considering you'd need to use molex adapters as there's only 1 PCI-E power cable with the CX).

Get him a less power-hungry card like the HD6770/7770 if you're going to use a Corsair CX430 to power it.
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post #3 of 13
7/19/12 at 10:44am
Thread Starter 
Quote:
Originally Posted by Phenom_955 View Post

If you're intent on pinching pennies the CX430 is about the only option, but for a system like that (with the Radeon HD5850) it is worth spending $60 on a quality unit (especially considering you'd need to use molex adapters as there's only 1 PCI-E power cable with the CX).

Get him a less power-hungry card like the HD6770/7770 if you're going to use a Corsair CX430 to power it.

Yea I know I'm squeezing it. It's because I have a CX430v2 just sitting here. xd
However, the load tests here: are what give me the confidence, the balls to put that in his machine and still think it's ok. If it's too dangerous a stability issue then I obviously won't take the risk and just have him spend $10-15 more for a legitimate unit. Otherwise I'll stick to it. tongue.gif

Thanks for the advise. I think I got a clearer idea of what the limits are and how far I can push them just by thinking in reply.
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post #4 of 13
7/19/12 at 10:53am
The PSU won't handle crossloading very well (which is what a turbo-boost capable core i5 2500, HD5850 equipped system can potentially do at high load as it's mostly 12V draw). Which in short, means the 12V rail can drop out of spec and cause stability problems. Even if it doesn't, I don't really trust running molex adapters on that kind of unit. I guess if you're not loading both the CPU and GPU heavily at the same time it would be fine...
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post #5 of 13
7/19/12 at 11:02am
jonnyguru reviewed Silencer MK III 600w, the same series just with a different watt, pretty decent one esp for its price. But if being modular is not a must, cx430v2 is even cheaper.

That being said, either one will work fine for 2500K+5850 with moderate OC.
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post #6 of 13
7/19/12 at 11:08am
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Quote:
Originally Posted by Phenom_955 View Post

The PSU won't handle crossloading very well (which is what a turbo-boost capable core i5 2500, HD5850 equipped system can potentially do at high load as it's mostly 12V draw). Which in short, means the 12V rail can drop out of spec and cause stability problems. Even if it doesn't, I don't really trust running molex adapters on that kind of unit. I guess if you're not loading both the CPU and GPU heavily at the same time it would be fine...

This?
Quote:
Originally Posted by kalvin37 View Post

jonnyguru reviewed Silencer MK III 600w, the same series just with a different watt, pretty decent one esp for its price. But if being modular is not a must, cx430v2 is even cheaper.

That being said, either one will work fine for 2500K+5850 with moderate OC.

Comfortable with using PSUCalc and other sources but ^THAT (crossloading) makes me uncomfortable whereas I wasn't before. Do you think an i5-2500k + 5850 could crossload?
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post #7 of 13
7/19/12 at 11:14am
Quote:
Originally Posted by FlashFir View Post

This?
Comfortable with using PSUCalc and other sources but ^THAT (crossloading) makes me uncomfortable whereas I wasn't before. Do you think an i5-2500k + 5850 could crossload?

To be clear I've only commented on the CX430 so far. The reason I brought up crossloading on that unit is because the rails are regulated as a group and not independently, unlike higher-end PSUs. The Jonnyguru review shows the CX430 version II's 12v output dropped to 11.58 when load tested individually. There will be very little in that system that uses anything other than 12v (perhaps the memory modules and drives will use a little 5v power).

The Silencer MK 3 is the superior unit out of those two, but it still has the problem of one less PCI-E connector than the HD5850 requires.
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post #8 of 13
7/19/12 at 11:17am
Thread Starter 
Quote:
Originally Posted by Phenom_955 View Post

Quote:
Originally Posted by FlashFir View Post

This?
Comfortable with using PSUCalc and other sources but ^THAT (crossloading) makes me uncomfortable whereas I wasn't before. Do you think an i5-2500k + 5850 could crossload?

To be clear I've only commented on the CX430 so far. The reason I brought up crossloading on that unit is because the rails are regulated as a group and not independently, unlike higher-end PSUs. The Jonnyguru review shows the CX430 version II's 12v output dropped to 11.58 when load tested individually. There will be very little in that system that uses anything other than 12v (perhaps the memory modules and drives will use a little 5v power).

The Silencer MK 3 is the superior unit out of those two, but it still has the problem of one less PCI-E connector than the HD5850 requires.

To clarify you've only commented on the CX430 (v1, not labeled such) as compared to the CX430 v2? In which case, I'll disregard what you said and stick to it.

Isn't RAM & 1 or 2 HDDs + 1 SSD pretty normal usage? If that's the case than a LOT of budget gaming PC's have high crossloads??? I know you're trying to cover all bases but you are beginning to confuse me as to what's the norm.

As for Molex to PCI cables: If the power draw is still under the unit's capability to deliver safely without ripple, who cares? It does what it's supposed to do well.
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post #9 of 13
7/19/12 at 11:24am
He is generally correct.
The Silencer MKIII is indeed a superior unit, in all regards.
The problem with using a Molex->PCIe adapter is that you only have three of them on that particular unit, so you'll be left with only one after using an adapter... if that's sufficient then by all means go for it, but it usually isn't.
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post #10 of 13
7/19/12 at 11:28am
Thread Starter 
Quote:
Originally Posted by Original Sin View Post

He is generally correct.
The Silencer MKIII is indeed a superior unit, in all regards.
The problem with using a Molex->PCIe adapter is that you only have three of them on that particular unit, so you'll be left with only one after using an adapter... if that's sufficient then by all means go for it, but it usually isn't.

https://docs.google.com/spreadsheet/ccc?key=0Aoqm-6PvQW_OdEwzZ045aUJLTExGSnJ1dUJzbGs3MEE

The build is for a friend and we ain't stickin' windows on it.
So it being a non-enthusiast system that won't be seeing upgrades or loads of fans; can have 0 molex connectors left and we'll be fine! tongue.gif
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