[SOLVED] is my psu enough

george.tancre · Nov 22, 2018

Here are my specs im going to have with an 850W plus gold rated PSU:
-9th Gen Intel® Core™ i9 9900K (8-Core/16-Thread, 16MB Cache, Overclocked up to 4.7GHz on all cores)
-Dual NVIDIA® GeForce® GTX 1080 Ti graphics with 11GB GDDR5X each (NVIDIA SLI® Capable)
-32GB DDR4 at 2666MHz Dual Channel
-256GB M.2 PCIe NVMe SSD (Boot) + 2TB 7200RPM SATA 6Gb/s (Storage)
-Tray Load DVD-RW Drive (Reads and Writes to DVD/CD)
-then of course a nice 34 inch monitor and gaming mouse and keyboard

Darkbreeze · Nov 22, 2018

Yes, by a lot. As long as it's a quality 850w gold rated unit and not a poor quality one. Yes, there are both. The 80plus gold rating doesn't mean a thing other than it supposedly passed efficiency testing at that level. Often these are faked or simply handpicked units. If the platform and brand are not already known to be excellent, then the 80plus rating is meaningless.

What is the exact model number and brand of your unit?

george.tancre · Nov 22, 2018

Darkbreeze :

"Alienware™ 850 Watt Multi-GPU Approved Power Supply with High Performance Liquid Cooling" i actually am not sure its gold rated.. but the brand is alienware, i pretty much built this computer on dell website. its the new alienware aurora r8. also im not going to be doing anything crazy with it, ill be playing PUBG and other games. I just dont want the PSU to not be strong enough and i end up messing up some components such as processor or the gpu.

Darkbreeze · Nov 22, 2018

Did you pull this power supply from an Alienware rig or did you buy it new?

What is the EXACT model number as listed on the specifications decal ON the power supply itself? Have you already purchased this power supply? Do you have a link to it's product page?

george.tancre · Nov 22, 2018

Darkbreeze :

https://www.dell.com/en-us/shop/dell-desktop-computers/new-alienware-aurora/spd/alienware-aurora-r8-desktop/dpcwscr802hseq4
thats the link on where i built the computer with the specs i posted at the beginning along with their highest watt psu available which is 850watts right there. I know im a noob at this but im trying to learn still :/ if you go to that website you will see everything i fit into the computer and the PSU i had chosen.
im also not sure theres an exact model number as to its a customization computer i put together there on the website, and yea i have ordered it and it has shipped but i havent received it yet.

prince_xaine · Nov 22, 2018

Alienware is a trusted manufacturer. Being that you're buying the entire system from the dell website, it will come with a warranty. Once the warranty runs out (usually that's when junk PSUs fail) I'd just buy my own PSU after it expires.

george.tancre · Nov 22, 2018

prince_xaine :

But is 850w going to be enough to power this computer? because if i will need more then i should just immidiately buy a more powerful PSU

Darkbreeze · Nov 22, 2018

IF the unit it comes with is an even halfway decent example of an 850w power supply, then it is more than what is strictly necessary by at least 200w. Chances are good that it will not be a terrific power supply. They RARELY are in any prebuilt system unless you pay a premium for a better upgrade.

Even so, that unit is probably ok for that configuration. In terms of "rated" wattage, it's more than enough.

I have to really question the wisdom of buying a prebuilt like that though. You could build a much better system yourself for less and it's really not difficult. Two to three hours and a screwdriver is about all you really need.

PCPartPicker part list / Price breakdown by merchant

CPU: Intel - Core i7-9700K 3.6 GHz 8-Core Processor ($409.89 @ OutletPC)
CPU Cooler: Thermalright - Macho Rev.B 73.6 CFM CPU Cooler ($49.90 @ Amazon)
Motherboard: ASRock - Z390 Phantom Gaming 4 ATX LGA1151 Motherboard ($99.99 @ Newegg)
Memory: G.Skill - Ripjaws V Series 16 GB (2 x 8 GB) DDR4-3200 Memory ($114.99 @ Newegg)
Storage: Crucial - BX500 240 GB 2.5" Solid State Drive ($42.95 @ Amazon)
Storage: Seagate - Barracuda 2 TB 3.5" 7200RPM Internal Hard Drive ($58.50 @ Amazon)
Video Card: EVGA - GeForce GTX 1080 8 GB FTW DT GAMING Video Card ($559.00 @ B&H)
Case: Fractal Design - Focus G ATX Mid Tower Case ($54.47 @ Amazon)
Power Supply: SeaSonic - FOCUS Gold 750 W 80+ Gold Certified Semi-Modular ATX Power Supply ($49.99 @ Newegg)
Operating System: Microsoft - Windows 10 Home OEM 64-bit ($98.89 @ OutletPC)
Case Fan: Noctua - NF-P12 redux-1700 PWM 70.75 CFM 120mm Fan ($13.90 @ Amazon)
Case Fan: Noctua - NF-P12 redux-1700 PWM 70.75 CFM 120mm Fan ($13.90 @ Amazon)
Total: $1566.37
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2018-11-22 18:13 EST-0500

george.tancre · Nov 22, 2018

Darkbreeze :

IF the unit it comes with is an even halfway decent example of an 850w power supply, then it is more than what is strictly necessary by at least 200w. Chances are good that it will not be a terrific power supply. They RARELY are in any prebuilt system unless you pay a premium for a better upgrade.

Even so, that unit is probably ok for that configuration. In terms of "rated" wattage, it's more than enough.

I have to really question the wisdom of buying a prebuilt like that though. You could build a much better system yourself for less and it's really not difficult. Two to three hours and a screwdriver is about all you really need.

Keep in mind that it’s an i9 and there are TWO 1080ti gpu in it. I just didn’t know if u caught that since the configurations u sent were only one card and an i7. Also thanks if that 850watt is enough you’ve helped a great amount. Was very scared because online PSU calculators were saying I needed atleast 950W

LordVile · Nov 22, 2018

what CPU headers does your board have? If you overclock the hell out of a 9900K and a 1080Ti I wouldn’t be suprised to see 800W power draw.

Karadjgne · Nov 22, 2018

Most you'll draw from any cpu overclocked is @250w. Most you'll draw from a gpu is @375w. Add another 100w for the rest of the system, maybe 150w if going with extensive RGB. So maxed out with everything running 100%, that's still less than 800w and a physical impossibility. Most times you'll be running no more than @70% of maximum ability, or a little over 500w, well within that psu tolerances, ability and efficiency.

Karadjgne · Nov 22, 2018

Most you'll draw from any cpu overclocked is @250w. Most you'll draw from the gpus is @400w. Add another 100w for the rest of the system, maybe 150w if going with extensive RGB. So maxed out with everything running 100%, that's still less than 800w and a physical impossibility.

Darkbreeze · Nov 22, 2018

So, even with those dual 1080 ti's, if it's a very good 850w unit it can handle it. But it cannot handle it easily if you are also overclocking the cards OR the CPU.

I'd HIGHLY recommend a very good 1000w unit for GTX 1080 ti + 9900k + overclocking of anything.

Also, you can forget my earlier post with that build, as I had not realized earlier you had dual 1080 ti's. I could still beat that price, with better components (Even with RTX 2080's) but for some reason PCPP doesn't seem to want to let me use an SLI configuration no matter what motherboard I choose.

george.tancre · Nov 22, 2018

Karadjgne :

keep in mind that its TWO 1080tis, not just one graphics card.

george.tancre · Nov 22, 2018

Darkbreeze :

alright thanks alot, i wont be overclocking anything besides the processor which already came overclocks, "i9 overclocked on all cores up to 4.7ghz"

prince_xaine · Nov 22, 2018

Power Draw:
The Power Draw of your system places your Power Supply within 10% of it's full capacity, which is not recommended. Most gaming machines are built with a power supply that is more than 20% of the entire system power draw. This is just like any component in your system, you don't want it running at 90% utilization all the time.
i9-9900K - 170W Stock Full Load
GTX 1080 Ti - 275W Stock Full Load (x2)
The total combination of these two (three) components is over 700W. This does not factor in for the RAM, Case Fans, RGB lighting and any storage devices you may use. While technically it falls into the category of "enough", in my opinion, Alienware has not made itself noticed in the Power Supply market, and more than likely throws together a less premium than average power supply to save money on the beefier parts in the system.
Also, you are paying a much higher price than you need to if you just built it yourself. There are several better places to buy components from, such as Newegg and Amazon, but I chose eBay because it tends to be on the cheaper side of the market. Not that I'd recommend eBay over sellers with an actual reputation.

Alienware Price: $3389.99
eBay - Buy it Now - Brand New - Lowest Price + Shipping - United States Dollar
i9-9900K - $620
2x GTX 1080 Ti - $1380
32GB Corsair Vengeance LPX 2666 - $210
512GB Samsung 970 Pro - $170
2 TB HDD - 128MB Cache - 3.5in - 7200RPM - $70.
EVGA Supernova P2 1000W 80+ Platinum - $100.00
+$200 - 500 for case and motherboard of choice
Total: $2750.00 - $3050.00(not including monitor, cooler or other items such as the mouse, keyboard or optical drive.
Your results may vary depending on the vendor, but I recommend building it yourself. This is so your build looks how you want to build it, and so you know what's in it. You won't have to worry about the manufacturer making something cheap that will break later down the road. And each and every single part will come with it's own warranty.

Darkbreeze · Nov 23, 2018

I agree that it's cutting it very close, especially with an unknown power supply. If it were an EVGA G2/3 or Seasonic unit, I'd feel a lot better about it, but honestly like I said before you really are on the cusp of a 1000w unit being almost critically important.

[SOLVED] is my psu enough

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