Please critique this build for me!

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lofemofe

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Jun 7, 2012
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Hey guys,

I am looking at a computer build I can buy locally and it seems like a good deal but I don't know if it'll work. I want to use the build to play games like Overwatch and to be ready to upgrade the build in the future for VR.

I have a free GTX 580 that I can throw into this build as well.

Here's the build:
Intel Core i7-4790 Haswell Quad-Core 3.6 GHz
Gigabyte Ultra Durable GA-H81M-S2H motherboard
Geforce GTX 745 (OEM)
SPARKLE ATX-400PN-B204 400W ATX 12V 2.2
Kingston 8GB PC3-12800 DDR3-1600 2Rx8
Thermaltake Versa H22 Mid-Tower Case
NO HDD or SDD

I can buy this set up for around $380 CDN.

I will need to replace the GTX 745 with my GTX 580. And I will also need to buy an SSD and a HDD to throw in there as well. What I'm worried about is the PSU, will it be able to handle the addition of the GTX 580 + SSD + HDD? Also what is your opinion of this build overall and if it is a good deal?
 
Solution
13thmonkey
so divide 540 by 12, and the answer is 45amps max across all 3 12V rails. the stated 42 amps is overkill and a worst case scenario including the rest of the system. You are fine.
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lofemofe

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This makes sense. Now here is what I am thinking I can do. I have an old build that I can swap parts from. Here's the build:
Intel Core 2 Quad 6700 @ 2.66 Ghz
EVGA nForce 680i SLI (122-CK-NF68) Mother Board (LGA 775 Socket)
DDR2 4GB 400 MHz
EVGA Gefore GTX 570 Rev. 2
300 GB Hard Drive
WIFI
GigaByte 3DAurora Case Aluminum body ATX Full Tower
ANTEC Model EA-650 650W Max.

I was thinking of buying the build in the OP and putting the GTX 745 in this old build. Then take the Antex EA 650 PSU out of the old build and swap it with the Sparkle 400W PSU. The GTX 745 has the following power ratings:
Graphics Card Power (W): 55
Minimum System Power Requirement: 300

Then I can use the EA 650W PSU in the new build and throw my GTX 580 in there.

Would this work???

 
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13thmonkey

13thmonkey

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Depends on the exact spec of the PSU, does it have PCI-e power connectors? How many 12v amps? That old it is possible that they weren't such a consideration as they are now.
 
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lofemofe

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From the EVGA website it says it needs:
"An available 6-pin PCI-E power connector and an available 8 pin PCI-E power connector"

So the ANTEC EA-650 has:
"1 x 6-Pin, 1 x 6+2-Pin"

Does 6+2 Pin = 8 Pin? If so, it looks like its got the right connectors.

But I still have no idea what 12V Rails are/mean? Can you help clarify.

EVGA website says: "600 Watt or greater power supply with a minimum of 42 Amp on the +12 volt rail."

These are the Specs listed on the side of my PSU:
http://www.jonnyguru.com/modules/NDReviews/images/ANTECEA650/DSCF0008.jpg


 
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13thmonkey

13thmonkey

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for some reason I can't follow that link, but if you look at the current provided on the 12V rail you'll understand the total power it can provide, whether it can do all of that across both rails is unknown.

Newegg says, 22+22+25amps so in my opinion you'll be fine.
 
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lofemofe

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Yes in the link it shows:
+12V1 - 22A
+12V2 - 22A
+12V3 - 25A
Then it says:
+12V1, +12V2, 12V3 combined max output 540W

That looks like it might work.... But does that mean that all the 12V rails are used to power the GTX 580? That's still confusing.
 
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lofemofe

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Thank you sir! I was scared there for a moment... I already bought the system in the OP. Thought I'd need to invest in a new PSU which would throw my whole budget out the window.
 
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13thmonkey

13thmonkey

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I had to when I upgraded to a 580, decent 600W PSU from the same era as yours, but just earlier enough that the 12V rails weren't so important, hence why I was acutely aware of the possibility for an issue.
 
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