New PC Build - Advice on PSU

8
Found 31st May 2017
Hi folks

Building my first PC and a bit confused regarding the power supply to get. I 've tried a few of the online power supply calculators but all seem to vary. I know that a PSU works best at a 50-70% load but would be grateful for advice on which PSU to purchase.

The spec is:

CPU: Intel - Core i7-7700K 4.2GHz Quad-Core Processor (Bought) £276.00 @ Ebay

ARCTIC MX-4 Thermal Compound Paste (Bought) £3.95 @ Amazon

CPU Cooler: NZXT - Kraken X61 106.1 CFM Liquid CPU Cooler (Bought) £109.99 @ Amazon

Motherboard: Asus - STRIX Z270-E GAMING ATX LGA1151 Motherboard (Bought) £179.99 @ Ebay

Memory: Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory (Bought) - £99.00 @ Ebay

Storage: Samsung - 960 EVO 250GB M.2-2280 Solid State Drive (£117.00 @ Aria PC) Yet to buy

Storage: Western Digital - BLACK SERIES 2TB 3.5" 7200RPM Internal Hard Drive (Bought) £109.99 @ Ebay (Maplin)

Video Card: Asus - Radeon RX 580 8GB ROG STRIX Video Card (£278.48 @ Ebuyer) Yet to buy

Case: Rosewill - B2 SPIRIT ATX Full Tower Case (Bought) £78.20 @ Amazon Warehouse

Power Supply: ?????? Yet to buy

Optical Drive: LG - WH14NS40 Blu-Ray/DVD/CD Writer (£56.40 @ Aria PC) Yet to buy

Operating System: Microsoft - Windows 7 or 10 (Got bootable Win 7 Disc and a key)

PCPartpicker estimate:

Note: Wattages are estimates only. Actual power draw may differ from listed values.
Component Estimated Wattage
Intel - Core i7-7700K 4.2GHz Quad-Core Processor 11W - 91W
NZXT - Kraken X61 106.1 CFM Liquid CPU Cooler 10W - 15W
Asus - STRIX Z270-E GAMING ATX LGA1151 Motherboard 17W - 70W
Corsair - Vengeance LPX 16GB (2 x 8GB) DDR4-3000 Memory 14W - 14W
Western Digital - BLACK SERIES 2TB 3.5" 7200RPM Internal Hard Drive 4W - 20W
Samsung - 960 EVO 250GB M.2-2280 Solid State Drive 2W - 10W
Asus - Radeon RX 580 8GB ROG STRIX Video Card 46W - 185W
Total: 104W - 405W
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8 Comments
You could get away with a 750watt but I would go with Corsair 850watt, most come with 5 years or 7 years warranty, if you are planning on crossfire setup later on then go for 1000watt or 1100watt, people are misled into thinking that the bigger the wattage the more power, use, this is totally false, the system will only use what it draws at the time from the psu, so if your system is drawing 700watts, you will be using the same electricity with a 750watt as you do a 1100watt, hope this helps bud
May be worth while looking at an AMD ryzen build to either save money or have spare cash for a better gfx card.
https://m.alza.co.uk/msi-gtx-1070-aero-8g-oc-d4364592.htm#

id personally get the gtx 1070, its like 1/3 more powerful and only like £50 more
Fair point, I wouldn't waste my money on the 10 series nvidia go for a 980ti 6gb or 2 in SLI if you have got the cash you can easily find them for £150 and I would recommend the GIGABYTE Windforce Noisy but the cards stay cool check ebay or if you don't mind dropping direct x very which 99 out 100 people would tell the difference get 2 x 690 gtx each card gas over 3000 cuda 2 of them absolutely destroy a 1080ti and for only 150 each card
You can get the NZXT x61 for a little less here: flubit.com/sho…Psw
I have an evga PSU and it's excellent. One of the G2 range (850 watt). They have a 10 year guarantee so would hope evga have confidence in their longevity. It has a silent mode when drawing low current, I don't think I've ever heard the fan kick in.

When I was looking the other week the 650 watt looked like a good sweet spot for watts per pound, but I personally always like to highly overspec PSUs for gaming rigs. Had too many bad experiences with blown components and coil whine.

If you can I'd definitely go for an nvidia GPU for the power draw reasons.

My 2p on sli...not really worth the hassle and still not hugely supported, but agree it's good to have PSU headroom in case you need it.
Edited by: "UriStamonov" 31st May 2017
By the way that's a monster of a machine
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