GPU for i7 2700k and power consumption

[Patrik Frankovic]

Hello everybody, 
My current PC specs are:
 Asrock Z77 Extreme4
 Crucial MX500 250gb, Segate Barracuda 1T
16 gb Hyperx RAM, 1600 MHz
Corsair CS550M 80+ Gold,
i7 2700k, stock cooler ( probaly will get nh-d14 or d15 )
MSI 1050, 2 Gb, OC. 
I will maybe upgrading my GPU in the following month but I can realy decide which to chose. First I was picking between gtx 1660 Ti and rtx 2060 but I saw gtx 1080 was selling for almost the same price as gtx 1660 Ti. I was wondering if I could get gtx 1080 and good cooler like nh-d15 and oc the CPU to 4.5ghz - 4.9ghz. Would there be a problem with my PSU? I was calculating rougtly and got around 540 W from stress test data. Prime95 on the i7 2700k (stock is 95W) 4.5ghz ~180W. Gtx 1080 (stock is 180W) on stress test 220 W. And my all other components add up to 138W to a total of 538W. Did I calculate something wrong becouse this seems a bit much to me? If I shouldn't go for the 1080, should I go for the gtx 1660 Ti (120W) or gtx 2060 (160W)? I would really like one of these two options: 1080 strix oc or 1080 amp! extreme.

PCPartPicker Part List

Type	Item	Price
CPU	Intel Core i7-2700K 3.5 GHz Quad-Core Processor	$295.90 @ Amazon
CPU Cooler	Noctua NH-D15 82.5 CFM CPU Cooler
Motherboard	ASRock Z77 Extreme4 ATX LGA1155 Motherboard
Memory	Kingston HyperX Fury Blue 16 GB (2 x 8 GB) DDR3-1600 Memory	$79.99 @ Amazon
Storage	Crucial MX500 250 GB 2.5" Solid State Drive	$48.65 @ Amazon
Storage	Seagate Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive	$79.89 @ OutletPC
Video Card	Zotac GeForce GTX 1080 8 GB AMP! Extreme Video Card
Power Supply	Corsair CSM 550 W 80+ Gold Certified Semi-modular ATX Power Supply
Case Fan	Corsair Air Series SP120 Quiet Edition (2-Pack) 37.85 CFM 120 mm Fans
	Prices include shipping, taxes, rebates, and discounts
	Total	$504.43
	Generated by PCPartPicker 2019-08-28 15:32 EDT-0400

PCPartPicker Part List

Type	Item	Price
CPU	Intel Core i7-2700K 3.5 GHz Quad-Core Processor	$295.90 @ Amazon
CPU Cooler	Noctua NH-D15 82.5 CFM CPU Cooler
Motherboard	ASRock Z77 Extreme4 ATX LGA1155 Motherboard
Memory	Kingston HyperX Fury Blue 16 GB (2 x 8 GB) DDR3-1600 Memory	$79.99 @ Amazon
Storage	Crucial MX500 250 GB 2.5" Solid State Drive	$48.65 @ Amazon
Storage	Seagate Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive	$79.89 @ OutletPC
Video Card	Asus GeForce GTX 1080 8 GB STRIX Video Card
Power Supply	Corsair CSM 550 W 80+ Gold Certified Semi-modular ATX Power Supply
Case Fan	Corsair Air Series SP120 Quiet Edition (2-Pack) 37.85 CFM 120 mm Fans
	Prices include shipping, taxes, rebates, and discounts
	Total	$504.43
	Generated by PCPartPicker 2019-08-28 15:32 EDT-0400

Thank you in advance.

 

 

 

[flibberdipper]

On paper you'd be fine. I've done more heinous things on a CX430M.

[king_gill]

It would be fine under normal loads but if u decide to put it under a lot of stress then it might have a problem

 

[OrionFOTL]

Your entire setup will only approach 300W under heavy load, so that's a lot lower than your power supply's 550W rated maximum continuous power.

[Patrik Frankovic]

I am planning to only game on it, so it should be fine if I oc the cpu to around 4.8?

[OrionFOTL]

Yes, that's when you will start approaching the 300W consumption number. On stock processor frequency, the load will be even lower.

[Patrik Frankovic]

I agree with you but 300w seems too low. In my mind it is more like ~470w becouse oc cpu would be ~160w , gtx 1080 is ~210w and the rest ~100w. Am I wrong?

[SkilledRebuilds]

My 2600k at 4.8Ghz pulled 120-140watts according to software's...

 

Take that for what you will...

[OrionFOTL]

1 hour ago, Patrik Frankovic said:

I agree with you but 300w seems too low. In my mind it is more like ~470w becouse oc cpu would be ~160w , gtx 1080 is ~210w and the rest ~100w. Am I wrong?

Don't use your mind, or calculators (if you do use them), or even the specifications sheets - use real world power consumption tests.

 

Just like you don't use "FPS calculators" or spec sheets when checking performance of a GPU (you read tests in games and FPS comparisons instead), or don't use spec sheets or "CPU calculators" (if those even existed) when checking performance of a CPU (you read tests in productivity programs instead).

 

Start with looking for reviews of GTX1080, your target graphics card. I use the polish website PCLab, but you can use many more who reviewed non-reference 1080s.

Here's their test setup, no need to understand the language: https://pclab.pl/art70047-2.html

They're testing ASUS GTX 1080 Strix, and use i7-6700k OCed to 4.7GHz. The rest is standard.

Since your setup will also use a non-reference 1080, an older i7 overclocked to 4.5, and the rest is standard, then we can conclude their test setup sips even more power than yours - since graphics cards are the same, processor is more powerful and the rest is the same. Right? Okay.

 

Now here's the power consumption testing: https://pclab.pl/art70047-29.html

The first chart is at idle, and the second is at load in Witcher 3.

 

Spoiler

 

As you can see, their entire system with i7-6700@4.7 and GTX1080 consumed 306W under load.

Therefore, your entire system with i7-2600@4.5 and GTX1080 will consume a very similar amount.

 

The power supply in their system is around 92% efficient. So, their setup only sipped around 282W from the power supply under load.

 

 

 

I tried to find a second source, in English. So here's Anandtech testing a GTX1080: https://www.anandtech.com/show/10325/the-nvidia-geforce-gtx-1080-and-1070-founders-edition-review/30

Their setup is i7-4960X@4.2, a processor even more power-hungry than yours, and an X79 motherboard.

Their system definitely sips more power than a setup with the same GTX1080, but a lower-power i7-2600K processor.

 

So in their testing, power consumption under load in Crysis 3 was 335W at the wall. Assuming 92% efficiency, that means 308W of actual power consumption.

 

 

TweakTown did a review of GTX1080 as well: https://www.tweaktown.com/reviews/7703/nvidia-geforce-gtx-1080-review-hail-king-baby/index11.html

Their setup is GTX1080 with an 8-core i7-5960X Extreme Edition, which is definitely a more power-hungry CPU than yours.

 

In their testing, their entire setup consumed just 230W from the wall.

 

 

 

So with those three sources that you can freely look at, you can come to the following conclusion: if three setups including GTX1080, and other components more powerful than yours, consume 300W under load or less, then your setup, with the same GPU and weaker rest of the parts, will also consume 300W under load or less.

[Patrik Frankovic]

Thank you all very much for help, expecialy OrionFOTL for your thorough explanation.

[Patrik Frankovic]

Also one more good benchmark: https://www.vortez.net/articles_pages/zotac_gtx_1080_amp_extreme_review,5.html

CPU used is: i7-5960X Extreme Edition (4.0ghz OC) - stock TDP 130W 

 

[seagate_surfer]

6 hours ago, OrionFOTL said:

This space is left blank on purpose

Yes! The technical documentation definitely explains the standard and its sustained theoretical capabilities, but in tests out there in the real world they throw us different results that do not necessarily conform to what it says on paper, it is like comparing two SSDs of type SATA 3, one could get to have better results than the other but none of the two managed to reach the maximum that the standard of SATA 3 says on paper which is 600 MB/s...