450w PSU enough for this build?

Christopher Aubert · Feb 12, 2018

I already have some of the parts for this build, mostly am upgrading the CPU, motherboard, and changing cases (which requires an SFX PSU). If I were to upgrade to an i7 down the line, would the PSU still be sufficient enough?

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i5-8400 2.8GHz 6-Core Processor ($185.99 @ Amazon)
Motherboard: ASRock - Z370M-ITX/ac Mini ITX LGA1151 Motherboard ($134.99 @ Amazon)
Memory: Crucial - Ballistix Sport LT 8GB (1 x 8GB) DDR4-2666 Memory ($87.34 @ Amazon)
Storage: Samsung - 860 Evo 250GB 2.5" Solid State Drive ($94.99 @ Amazon)
Storage: Western Digital - WD Blue 1TB 2.5" 5400RPM Internal Hard Drive ($51.63 @ Amazon)
Video Card: EVGA - GeForce GTX 1070 8GB SC2 Gaming iCX Video Card
Case: Silverstone - ML08B-H HTPC Case ($84.96 @ Amazon)
Other: SilverStone Technology 450W SFX Form Factor 80 PLUS BRONZE Power Supply (ST45SF-V3) ($59.99 @ Amazon)
Total: $699.89
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-02-12 10:18 EST-0500

Luker1759 · Feb 12, 2018

I personally would go with maybe a 600W PSU for that build, then you know you have more than enough. It would also cater for your future CPU upgrade. That's just me though, I'm sure others will think different

geofelt · Feb 12, 2018

I would not. GTX1070 needs a 8 pin aux connector.
A 500w psu is recommended.
http://www.realhardtechx.com/index_archivos/Page362.htm
OTOH, the Silverstone sfx power supplies are supposed to be good, so it might work.
Since they offer stronger sfx psu's, I think I would go stronger.

Christopher Aubert · Feb 12, 2018

geofelt :

Well, just so you know, the 1070 I have takes a single 8-pin, it has been a while since I bought the card, so the one in the list may be wrong, but it's this one: https://www.newegg.com/Product/Product.aspx?Item=N82E16814487320
Does that change your answer?... or would you say the same?

geofelt · Feb 12, 2018

I looked up your card to find the 8 pin requirement.
I think my answer would be the same.
I think I would spend a bit more on a 500w unit like this:
https://www.newegg.com/Product/Product.aspx?Item=N82E16817256202
It is gold rated and fully modular which will help in a small case.

Some other thoughts on your build:

1. I see a single 8gb ram stick. Usually a 2 x 4gb kit is better since you will operate in faster dual channel mode.
If you picked a single stick with the thought of a future upgrade, realize that such an upgrade might not work and will not be supported.
Ram is sold in kits for a reason.
A motherboard must manage all the ram using the same specs of voltage, cas and speed.
The internal workings are designed for the capacity of the kit.
Ram from the same vendor and part number can be made up of differing manufacturing components over time.
Some motherboard can be very sensitive to this.
This is more difficult when more sticks are involved.
That is why ram vendors will NOT support ram that is not bought in one kit.
It is safer to get what you need in one kit.
But, it is a bit more expensive because of the added matching of all the sticks to insure compatibility.
Better to buy your 2 x 8gb kit up front.

Love Samsung evo for windows.
Consider using the m.2 variant which will cost about the same.
https://www.newegg.com/Product/Product.aspx?Item=N82E16820147675
For not much more, the 960 evo pcie will give you some 4x faster sequential speeds.
https://www.newegg.com/Product/Product.aspx?Item=N82E16820147593
These m.2 devices are amazing. They are about the size and shape of a stick of gum.
They fit in a motherboard m.2 slot and need no extra wiring. A plus in a small case.

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450w PSU enough for this build?

Christopher Aubert

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geofelt

Luker1759

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Christopher Aubert

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geofelt

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