Do I Need A 1000W PSU?

[Winlock]

In the next PC im building im going to have an Rtx 2070 and a Ryzen 7 2700x 
ive been told that ill need at least a 1000w Psu but that sounds overkill
so i decided to consult the all knowing LTT Forums

[seon123]

No, you do not need a 1000W PSU to power a 250W system. 

[WereCatf]

3 minutes ago, Winlock said:

In the next PC im building im going to have an Rtx 2070 and a Ryzen 7 2700x 
ive been told that ill need at least a 1000w Psu but that sounds overkill
so i decided to consult the all knowing LTT Forums

A 550W or 600W PSU should do just fine.

[SmilesRising]

1000w is pretty overkill for most builds, i would suggest getting a good 500w psu instead

[Zando_]

5 minutes ago, smiles rising said:

1000w is pretty overkill for most builds, i would suggest getting a good 500w psu instead

^^^ A 1080 Ti (overclocked) and 6c/12t Xeon overclocked at 1.4v or more barely pull over 550W under full load. A good 550W-650W PSU is usually fine for pretty much any CPU and single card setup unless you have a really, really power hungry CPU or GPU (with just the Xeon maxed out the system will pull 300-350W, then the 1080 Ti adds the extra 200W or so) and are pushing overclocks you'll be fine.

[XR6]

1000W is overkill. I would recommend 650W, which should give you some headroom for overclocking/upgrades.

[manikyath]

in general, it's actually really hard to build anything that needs more than 850 watts, and for pretty much all single-gpu systems that dont utilize exotic cooling for overclocking (lets include water in that..) you'll be hard pressed to find components that'll overload a 650W unit.

[UncleJarvis]

28 minutes ago, Winlock said:

In the next PC im building im going to have an Rtx 2070 and a Ryzen 7 2700x 
ive been told that ill need at least a 1000w Psu but that sounds overkill
so i decided to consult the all knowing LTT Forums

yes you do...update your bios first.

[tarfeef101]

One thing to note is most PSUs are most efficient around 50% load, so if you want to get a high-wattage PSU to be at peak efficiency, that something many consider "overkill" might still be worth it to you.

If you overclocked both of your components and put them under heavy load, you could hit close to 400W (pretty intense scenario assuming some heavy overclocking, but possible). 

So, if you think you'll often be under a heavy load, and want a really efficient system even if that means spending more than you need to, 750W is a reasonable choice. 


But for most people that doesn't matter, and you'll save more by just getting a lower wattage PSU anyways. But I like to point out the possible reasons one might go for a high wattage PSU. Speaking of which, you could also get a higher wattage to leave room for a second GPU, or a future CPU upgrade, etc. 

[Spotty]

6 hours ago, UncleJarvis said:

yes you do...update your bios first.

Why do you believe a Ryzen 2700x + RTX2070 requires a 1000W PSU? And what relevance does the BIOS version have to do with it, especially since they haven't specified which motherboard they're using?
 

 

7 hours ago, Winlock said:

In the next PC im building im going to have an Rtx 2070 and a Ryzen 7 2700x 
ive been told that ill need at least a 1000w Psu but that sounds overkill
so i decided to consult the all knowing LTT Forums

No, you do not need 1000W PSU for that system.
Ryzen 2700x without overclocking is about 110W max.
RTX 2070 is about 175-200W depending on model & factory overclocks.
Add another 50W for some storage drives, fans, motherboard, etc...

Looking at less than 400W total system power draw while running stress tests on the CPU, GPU, and HDDs at the same time. Probably under 300W in a more realistic scenario such as gaming. A good quality 450W would be suitable. 550W would also make sense if you were looking at units that start at 550W (ie RM550x). Anything beyond that is unnecessary. 1000W is a waste of money and whoever told you that you need 1000W for that system has no idea what they're talking about.

Edited February 23, 2019 by Spotty
Looks like some posts I were quoting were deleted by mods so removed the quotes

[comicsansms]

6 hours ago, tarfeef101 said:

One thing to note is most PSUs are most efficient around 50% load, so if you want to get a high-wattage PSU to be at peak efficiency, that something many consider "overkill" might still be worth it to you.

Not really. It really depends on the unit, some are below 50, while others are closer to 90. Anyway, most of the time, you aren't going to use 375W of a 750W supply, so that logic falls away there.

 

If you want a PSU with better efficiency; get a more efficient supply, not a higher wattage supply.

 

 

[tarfeef101]

10 minutes ago, Comic_Sans_MS said:

Not really. It really depends on the unit, some are below 50, while others are closer to 90. Anyway, most of the time, you aren't going to use 375W of a 750W supply, so that logic falls away there.

 

If you want a PSU with better efficiency; get a more efficient supply, not a higher wattage supply.

 

 

a) the word most exists. and I used it. it is also correct. most are more efficient around 50%
b) I also specifically noted that IF they're often under heavy load it is a viable consideration. 

So the logic is actually completely valid if you, you know, read.

Sorry for being so aggressive, but also not really cause I don't like people telling me I'm wrong unless I really am.

I'll say the last part is at least a good idea. Just getting a more efficient power supply is probably cheaper. Although you lose the expandability down the line benefit of higher wattage units, the efficiency gain from say, gold to platinum is almost always better than 400W gold to 750W gold in the best part of the curve.

[KarathKasun]

29 minutes ago, tarfeef101 said:

a) the word most exists. and I used it. it is also correct. most are more efficient around 50%
b) I also specifically noted that IF they're often under heavy load it is a viable consideration. 

So the logic is actually completely valid if you, you know, read.

Sorry for being so aggressive, but also not really cause I don't like people telling me I'm wrong unless I really am.

I'll say the last part is at least a good idea. Just getting a more efficient power supply is probably cheaper. Although you lose the expandability down the line benefit of higher wattage units, the efficiency gain from say, gold to platinum is almost always better than 400W gold to 750W gold in the best part of the curve.

Not with 80+ cert.  They tend to be just as efficient at 50% as they are at 80%.

[TomR19]

What if the 1000w psu is 80plus gold certified and is on offer at a lower price than other 550w 80plus bronze PSUs??? Is it worth than going for the 1000w psu??? In the store I use i found a good brand 1000w 80plus gold rated psu on offer from 120 to 69. There was also a 650w 80plus bronze from 100 to 89 discount. Wwyd?

[Deli]

46 minutes ago, TomR19 said:

What if the 1000w psu is 80plus gold certified and is on offer at a lower price than other 550w 80plus bronze PSUs??? Is it worth than going for the 1000w psu??? In the store I use i found a good brand 1000w 80plus gold rated psu on offer from 120 to 69. There was also a 650w 80plus bronze from 100 to 89 discount. Wwyd?

80 plus gold, 80 plus bronze only represent the efficiency rating. It says nothing about the quality of the power supplies and the components inside. You can have a crappy 80+ gold PSU with shit inside that blows up after two months. Or a reasonable performance-wise 80+ bronze that last 10 years.

 

Brands don't mean much in PSU. All brands have some top note models, at the same time crappy ones.

 

$69 for a 1000w PSU? Thanks, I'll pass.

[haunebu]

On 2/23/2019 at 1:13 AM, Winlock said:

In the next PC im building im going to have an Rtx 2070 and a Ryzen 7 2700x 
ive been told that ill need at least a 1000w Psu but that sounds overkill
so i decided to consult the all knowing LTT Forums

A 400W good psu is plenty. More than enough!

[Mister Woof]

i choose my PSU based on reviewed performance and warranty.

 

At that time, it was Seasonic Focus Plus Gold 850w units. They were $5 more than the 650w units at the time, so i figured why not, and also, they all came with 10 year warranties.

 

Something tells me a unit with a 10 year warranty is probably decent, given the manufacturer also sells units with 2-3 year warranties.

[Falkentyne]

2 hours ago, Mister Woof said:

i choose my PSU based on reviewed performance and warranty.

 

At that time, it was Seasonic Focus Plus Gold 850w units. They were $5 more than the 650w units at the time, so i figured why not, and also, they all came with 10 year warranties.

 

Something tells me a unit with a 10 year warranty is probably decent, given the manufacturer also sells units with 2-3 year warranties.

 

That's exactly what I did.  I chose my 2012 Seasonic Platinum 1000W on the same exact things.  And it's survived brownouts, 120v drops due to bad neutrals, everything and is still happily powering my 9900k and Vega 64.  Sure I got flamed to hell when people said I didn't need more than 600W for a i7 2600k and HD 7970 video card, but I just ignored them since it's my money so they have no say.  And it's paid off.  

I do the same strategy with everything.  I buy a full tower when I don't need tons of drives--I just want the space.  I bought 16 gigs of RAM for my 2600k when everyone was saying how (at the time) games didn't come close to 8 GB, and so on.  When I was much poorer, and *more* than simply destitute (don't ask), I had to live on not enough.  Trying to play Doom 2 with 1 MB of RAM, having to uninstall a DOS game to play another, etc.  I don't ever want to deal with not having enough for the job ever again.  So having a cushion is a good thing for me--buy more than you really need and never have to worry about space.  I don't go overboard.  I Just make sure I buy more than what the "community" says I need.

 

Never had to worry about going out of (total) space.  

I still need a very large HDD however.  Steam drives with 1 TB per drive are simply not enough now,  even if you have 6 TB spread out.  Yeah I've gone out of space on one drive

[17030644]

On 2/22/2019 at 5:13 PM, Winlock said:

In the next PC im building im going to have an Rtx 2070 and a Ryzen 7 2700x 
ive been told that ill need at least a 1000w Psu but that sounds overkill
so i decided to consult the all knowing LTT Forums

The one who told you that has no clue what he is talking about, even a 550W PSU is just fine

 

 

 

 

[Spotty]

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This discussion is from over a year ago.

 

If you want to help answer @TomR19 they have made a new thread here