Is my Corsair TX550 power supply enough for a 1080ti?

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jndtv2g

May 1, 2018
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Good day!

This is my first time posting in this forum and I am still a newbie regarding PCs.



It has been a month since my father and I bought this PC (we haven't bought a GPU yet due to the crazy prices right now). Everything is fine until I thought about the power supply we bought, which is a Corsair TX550. I'm currently worried because the PSU we bought may not be enough once we're able to buy a GPU. I've tried power supply calculators like Cooler Master, BeQuiet and Outervision, but I can't still figure out whether this PSU is already enough because other people say that some PSU calculators are exaggerated.

Here are the specs of my PC:

Processor: Intel Core i7 8700
Motherboard: ASRock Z370 Extreme4
RAM: G.Skill Ripjaws V 16GB 2400MHz (2 sets of 2x4GB)
CPU Cooler: Cooler Master MasterLiquid Lite 120 (1 fan)
Case Fans: Raidmax R120TP (I have 3 of them, I might add another one soon)
HDD: Seagate 1TB (7.2K RPM)
SSD: Adata SU800 256GB (I will buy this along with the extra fan soon)
Optical Drive: Asus 24x Internal DVD-RW
GPU: Asus ROG Strix GTX 1080 Ti (This is our target GPU but we don't have it yet)
I don't have other accessories like RGB strips or what. I don't and I won't overclock anything too.
I usually use my PC for 14-16 hours per day.


I really want to be sure if this PSU is enough for the GPU so that I can decide whether to save for 650W/750W or not. 🙁

Thank you.
 
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Your psu is a good build. It will hold your build but would not suggest to heavily overclock. Normally the heaviest it can use is around 480W (i7-7700K @5GHz), so I can say without overclock, your build should be fine. I would not recommend adding anything that use more power.

Buying 650W should be the ultimate safe bet.

If you rarely use the dvdrom, disconnect it as it might use power.
 
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I'd say your gaming load would be ~460W with a moderately-factory-OCed 1080Ti. So your TX would be fine.

Short of your "14-16" hours usage consist of 90% gaming, general/idle load would be quite lower and therefore should not affect long term durability of this good quality PSU.
 
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If you really want to be sure I would follow the manufacturer's recommendation and purchase a 600W or better quality PSU. I went for the Seasonic G-Series 650W 80+ Gold PSU. I purchased an $800+ EVGA 1080 Ti FTW3 Hybrid and so I wasn't going to try and cut any corners. Most 1080 Ti's have a 250W TDP. The Strix and EVGA's 1080 Ti FTW3 Hybrid both have a 285W TDP. Toss in the 65W CPU and the rest and you'll probably see less than an 80% load on that PSU. Technically it does offer enough power.

The Strix and that Hybrid I referred to were part of my journey over the course of about 9 month. I had a 970 FTW that turned out to be the weakest link in my build. To make a long story short I ended up with that EVGA. But why not the Strix? Asus is bleeping good when it comes to gaming hardware. The Strix stamp just makes it better. But then there are these reviews.

https://www.tomshardware.com/reviews/asus-rog-strix-geforce-gtx-1080-ti-oc,5225.html

https://overclock3d.net/reviews/gpu_displays/evga_gtx_1080_ti_ftw3_hybrid_review/1

What got me were the temps.. The Strix Ti topped out at 73c. The Hybrid Ti topped out at 46. I am also familiar with GPU Boost 3.0. It doesn't like the card over 56c. Which card stayed under 56c? I have the Hybrid Ti and love its performance.


What's GPU Boost? Okay, you go online window shopping for GFX card and you compare core and boost clocks.
My card says: Real Base Clock: 1569 MHz / Real Boost Clock: 1683 MHz; Memory Detail: 11264MB GDDR5X. And you aid NO OVERCLOCKING!!!!!. What that boost does is OC for you. My card' boost clock end up at 2000MHz without an OC. GPU Boost 3.0 does the OC'ing for you. It's on all Pascal cards including the Strix. BUT that 2000MHz is only possible at 55c or less. Once I touch 56c Boost downclocks 13MHz. The higher the temperature goes more 13MHz penalties are applied. I want every FPS I paid for. It looks a little like thermal throttling but it isn't. When it thermal throttles(usually at about 94c) it will bring the core clock under 1569. And the FPS penalty would then become significant.
 
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I would get a 650W PSU:

Seasonic Focus Plus
Corsair RMX
EVGA G3
 
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8700 : 60W
1080Ti: 250-300W (middle-of-the-road model to top of the line HOF/LightningZ)
Cooler Master 120AIO : 4W + 3W (pump+fan)
MB ~~~ 40-50W
4x DDR4 DIMMs ~~ 6W
HDD/SSD: ~4W each
Fans: 1.44W each = 4.32
DVD-RW: 30W max

Total: 465.32W

Conclusion, short of heavily OC situation, a good 550W is totally fine for the job.
 
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GTX 1080Ti can pull more than 300W easy when stressed.

A GTX 1080 can pull well over 250W. (The higher end cards)
 
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Please keep up with the time:
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OP has stated clearly that he:
I don't have other accessories like RGB strips or what. I don't and I won't overclock anything too.
Click to expand...
 
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That's with the reference card.

The partner cards are A lot different and can pull a lot more power.

Never go by reference card.

 
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We go by what it CAN PULL.

That way people don't end up burning up their PSU's if they start pushing the cards like a lot of them actually do. (Most actually end up OCing and pushing them)

Especially with the higher end cards.

Reason why a 650W PSU would be better as that is a lot for a 550W PSU to do on the PCIe rails.



 
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The most people need to consider, with regards to GPU power draw, is the OCed torture load. Quick 50ms peak power draw is just there for informative reason as good PSU can totally take care of that with no draw back, unless the PSU capacity itself was just barely enough for the average load.
 
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The TX550M isn't exactly the best unit out there. 😉

And the new ones are only 516W on the 12V.

https://www.anandtech.com/show/12070/the-corsair-tx550m-80plus-gold-psu-review

It's not bad, but getting a higher quality unit would be recommended.

Like the ones I recommended or even better like the Seasonic Prime.
 
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516W isn't enough.

The new TX550M has 516W on the 12V.

And only 1 PCIe cable with a daisy chain 2x 6+2. (Too much power draw for a single PCIe cable.)

Not enough for that system.

Reason why the other recommendations. (Unless he wants to burn up the PSU, GPU and or system)

So we are back to these and recommended 650W. (Need 2 separate PCIe cables)

Corsair RMX
Seasonic Focus Plus
EVGA G2 or G3


PCIe-Remark-Dont_1_.png



PCIe-Remark-DO_1_.png
 
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https://www.tomshardware.co.uk/graphics-card-power-supply-balance,review-33071-6.html
Theoretically, AWG 18 should be sufficient for anything between the PSU and graphics card, which is why this size is the most common. A single AWG 18 cable with two eight-pin connectors from a respected PSU vendor driving AMD's Radeon R9 295X2 yielded good results in our trial.
Click to expand...

The TXM line use AWG 18 on its PCIe cables, and the R9 295X2 is a 450W card.
 
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What in the hell are you talking about?

Did you even read the article?

The TX550M can't handle that much wattage on a single PCIe rail.


 
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The TXM is a SINGLE RAIL PSU with all of its 43A available to the 12V rail that will be supply to all its 24pins ATX, 8pins CPU, and 6+2 PCIe connectors/cables. And this single rail PSU design is the norm for most PSU nowadays including 1000W units like the Seasonic PRIME Titanium 1kW:

A single +12V rail can deliver up to 100A of current.
Click to expand...

There's no 2nd and separately "PCIe rail" so your rant is again a load of nonsense.

 
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The pictures I linked were from the Seasonic Website by the way. 😉


https://seasonic.com/faq


Installation remark for high power consumption graphics cards
High power graphics cards (above 225 Watts) are usually outfitted with two (or three) PCIe slots. For performance and safety reasons, Sea Sonic highly recommends the use of two (or three) separate PCIe cables to connect such cards to the power supply.

Here is the new picture.


pcie-installation1.jpg
 
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