what psu wattage should i get

shaz8246 · Jan 13, 2016

planning to upgrade by current build and was wondering what wattage psu to get as many site telling me different things., i already have the 650w psu but would it be enough.
i dont plan to overclock, but possibly plan to add a second r9 380 graphics card in the future, also possibly a 240gb ssd

build: http://uk.pcpartpicker.com/p/FZjNK8

Barty1884 · Jan 13, 2016

Wattage is not the "be all, end all". You want quality.

650W, of good quality is more than enough to power that setup currently. With a second R9 380 though, I wouldn't risk is. 750W minimum for that.

The Corsair CS line of PSUs is....ok, but not great. If I were you, I would invest in something like this: http://uk.pcpartpicker.com/part/xfx-power-supply-p1750xxxb9 initially.

Refer here: http://www.tomshardware.com/forum/id-2547993/psu-tier-list.html for the PSUs you want. Tier 1 or 2.

BadActor · Jan 13, 2016

I calculated your build with an overclock and the usual stuff. For one card, it's going to draw about 500 watts at peak. A 600 would be plenty for one card. If you think you're going to XFire it in the future, I'd get a 750 watt.

Dark Lord of Tech · Jan 13, 2016

Great fit for your build.

PCPartPicker part list / Price breakdown by merchant

Power Supply: EVGA SuperNOVA G2 550W 80+ Gold Certified Fully-Modular ATX Power Supply (£66.96 @ Aria PC)
Total: £66.96
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-01-13 21:24 GMT+0000

It's the best 550w PSU on the market based on the award winning Super Flower Leadex Gold series with a 7 year warranty.

http://www.jonnyguru.com/modules.php?name=NDReviews&op=Story6&reid=440
550W G2 review.

Performance (40% of the final score) - you probably already know what I'm going to say here. Voltage regulation was excellent, averaging 0.9% in the hot box. No points deducted. Efficiency was a pass for Gold both times. No deduction. Ripple control was amazing, and probably the best I've ever seen, so definitely no deduction there. I saw no issues with anything else, so this unit gets a 10 here.

Functionality (20% of the final score) - this unit gets everything right. Even the CPU cable, which I thought was terrible on the 650W, is done right here today. Semi fanless mode works well, the manual is decent, we got lots of connectors to power anything a 550W unit should power, and the box came with more goodies than I tend to expect with such a small unit. 10.

Value (20% of the final score) - you can get one of these for $84.99 at Newegg right now. That's a fair bit for a unit this size these days, but as always EVGA is right at the bottom of the cost pile when it comes to 80 Plus Gold and full modularity. The nearest competition is their own 550W GS unit at one dollar more money. This is nuts. How are you making any money on these, EVGA? 10.

Build Quality (20% of the final score) - oh, snap... EVGA just got another perfect total score. There's nothing wrong with this unit. Nothing. 10.

Barty1884 · Jan 13, 2016

^^ A great, well priced unit SR-71 just linked and if you don't want to CrossFire, it's definitely the best option for your needs.

It'll depend on your plans. If CrossFire is a maybe and leaning towards probably not, the GS 550 would be a great option.

If CrossFire is something you want to actively pursue, I personally wouldn't attempt it on a 550W PSU. A quality, 750W PSU would give you that headroom.

shaz8246 · Jan 13, 2016

If CrossFire is something you want to actively pursue, I personally wouldn't attempt it on a 550W PSU. A quality, 750W PSU would give you that headroom.

Will the 750w be fine with possible overclocking and crossfire so should i go bigger with a 850w?

Barty1884 · Jan 14, 2016

I would suggest 750W would be fine, but if you can find a good quality 850W unit for a similar price, it won't hurt.

PCPP has a pretty accurate estimate for "absolute max" load. So 417W based on what you have at the moment. +190W for the CrossFire and an over-estimate would be +15% of the overall rig for OCing (using the total rig is overshooting it anyway, as CPU/RAM/Mobo (and maybe GPU) are the only things that would/could be impacted by an OC.
That puts you at 700W.......and that't absolute max. You'll never actually be running anything at that kind of wattage.

Again, 750W would be fine, bit looks like the 850W version of the same is only 7quid more!
http://www.aria.co.uk/Products/Components/Power+Supplies/Modular+700-950W/850W+XFX+Pro+XXX+Edition+80PLUS+Bronze+Modular+Power+Supply+%5BP1-850X-XXB9%5D+?productId=53996&source=pcpartpicker

Or a fully modular 850W for 95quid
http://uk.pcpartpicker.com/part/xfx-power-supply-p1850bbefx

As an FYI: for OCing, your board (being an H97) may not be the most helpful. You can always use software, but the multiplier & voltage options may be unavailable within your BIOS to do it manually.

Given that software usually over-volts to a stable OC, I would recommend you tread carefully in any OCing attempts.

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what psu wattage should i get

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