Estimated PSU needed for rtx 3080

[shinjichiro]

Based from the leaks, could you guys be able make an intelligent guess whether a 750 psu can handle the new gpus or If 850 psu would be better along side a 3700x ryzen. Thank you so much!

[DakotaWebber]

Dont buy or change anything until things are no longer intelligent guesses or leaks/rumours

 

a 750 seems like it would be fine

[XAIXER]

I think 750w should be fine, but you have to take into account any overclocking that you do.

[Ankerson]

NOBODY KNOWS....

 

Wait until they come out and are tested etc, And the after market cards too...

 

I would guess min 750W....

 

 

[seon123]

Let me just get out my crystal ball, and answer that question... Just wait until their official specs are release and/or proper reviews are out.

[Bombastinator]

An intelligent guess?  Not really.  there is info out about the 3090 but it’s a totally different card.  The only thing to do would be to pretend it’s a 3090
 

Afaik the 3080 may have no comparison at all to the 3090. The GPU is being built on a different architecture by a different company in a different country. The only thing that may be really similar is the name.  

[LIGISTX]

I’m sure a 750 will be way more than enough. But.... waiting is smart.

 

For a point of reference, my 9900k @5ghz pulls down 200 watts on its own in a stress test. In games, my system draws about 400-450 watts max. Let’s assume you CPU draws the same, and assume the 3080 draws double the 2080.... a 750 is still plenty. 

[shinjichiro]

Thank you guys for the replies! I know that the way to go is to wait, its just that PSUs are rarely in stock in my country and i just happen to bump into one, and i was thinking i should get one before they disappear again haha

[Bombastinator]

13 minutes ago, shinjichiro said:

Thank you guys for the replies! I know that the way to go is to wait, its just that PSUs are rarely in stock in my country and i just happen to bump into one, and i was thinking i should get one before they disappear again haha

Well a 750 will do it for a 3090 and more. The 3080s we know nothing about other than Samsung is doing the dies on their own process which the chip was not designed to be built on.  It could go anything from really well to really badly.  If it goes really really badly and they can’t actually make them work (a la intel) there may be no 3080s at all.

[Ankerson]

2 hours ago, LIGISTX said:

I’m sure a 750 will be way more than enough. But.... waiting is smart.

 

For a point of reference, my 9900k @5ghz pulls down 200 watts on its own in a stress test. In games, my system draws about 400-450 watts max. Let’s assume you CPU draws the same, and assume the 3080 draws double the 2080.... a 750 is still plenty. 

 

Remove the power limit and the 9900K will pull more than that.... More in the 250W range depending on the VCORE...

 

Would be a pretty safe bet, but as we said it's best to wait just to be sure.

 

One just never knows, it could pull more power than the 2080Ti.... But we just don't know...

[LIGISTX]

Just now, Ankerson said:

 

 

Would be a pretty safe bet, but as we said it's best to wait just to be sure.

 

One just never knows, it could pull more power than the 2080Ti.... But we just don't know...

I agree. But it would have to pull 450+ watts on its own to even come close to a 750 not being enough... that would be an absolutely insane requirement. 

[Ankerson]

1 minute ago, LIGISTX said:

I agree. But it would have to pull 450+ watts on its own to even come close to a 750 not being enough... that would be an absolutely insane requirement. 

 

Why I said it would be a safe bet.

 

750W is really the sweet spot for high end machines now.... 

[Bombastinator]

Some versions of the 3090 appear to need 3 8 pin power connectors and draw 400w oc so a PSU would need to have 3 pcie power cables.  Many PSUs don’t have that.  All we got data about is the 3090 though.  If you feel like watching a sort of smug rumor person there this Moore’s law is dead video.  It’s mercifully short for one of those.  Less than 9 minutes.  They can be more like 45 sometimes.

 

[Ankerson]

18 minutes ago, Bombastinator said:

Some versions of the 3090 appear to need 3 8 pin power connectors and draw 400w oc so a PSU would need to have 3 pcie power cables.  Many PSUs don’t have that.  All we got data about is the 3090 though.  If you feel like watching a sort of smug rumor person there this Moore’s law is dead video.  It’s mercifully short for one of those.  Less than 9 minutes.  They can be more like 45 sometimes.

 

 

400W OC is pretty high... 3X PCIe cables is a sure sign it can really pull....

 

The after market cards might even pull more than that.... The high end cards anyway... Might add +100W to that.....

 

My 2080Ti can pull over 380W easy with an OC, really pushing it, but I don't run it like that...... I plan on keeping it for awhile yet.... Might have to run a small OC maybe next year or something depending on the game...

[Ankerson]

40 minutes ago, LIGISTX said:

I agree. But it would have to pull 450+ watts on its own to even come close to a 750 not being enough... that would be an absolutely insane requirement. 

 

 

That's not really that far out as some would believe.

 

The High End 2080Ti (SOME) can pull over 380W easy when overclocked.... Reason why the recommend a 750W PSU....

 

So figure around 50W more than a high end aftermarket 2080Ti isn't really all that much when you think about it...

 

I doubt the 3080 will pull like that, but we just don't know...

[Ankerson]

Based on my own system in my sig and what is possible wattage wise just with the GPU and CPU power alone it's ~650W..... JUST for the GPU and CPU..... Not including the rest of the machine....

 

Now other than stress testing with an OC it won't get near that like in normal gaming, depending on the game.... Although I do run the CPU at 5 GHZ on all cores with the power limit removed in the BIOS and in X1 the sliders are all the way over on the Wattage and voltage..... So it does pull some serious power.... So 750W isn't unrealistic at all for a PSU.... Even 850W isn't unrealistic...

 

 

[LIGISTX]

46 minutes ago, Ankerson said:

Based on my own system in my sig and what is possible wattage wise just with the GPU and CPU power alone it's ~650W..... JUST for the GPU and CPU..... Not including the rest of the machine....

 

Now other than stress testing with an OC it won't get near that like in normal gaming, depending on the game.... Although I do run the CPU at 5 GHZ on all cores with the power limit removed in the BIOS and in X1 the sliders are all the way over on the Wattage and voltage..... So it does pull some serious power.... So 750W isn't unrealistic at all for a PSU.... Even 850W isn't unrealistic...

 

 

I.... don’t know. That’s a lot for a single card. In games I rarely get above 420-430, and that’s also a 5ghz 9900k. My GPU isn’t an amazing overclocker at about 2000mhz most of the time, and it’s not a ti. But still.

 

Either way, we all agree, waiting is a good idea. 

[Ankerson]

3 minutes ago, LIGISTX said:

I.... don’t know. That’s a lot for a single card. In games I rarely get above 420-430, and that’s also a 5ghz 9900k. My GPU isn’t an amazing overclocker at about 2000mhz most of the time, and it’s not a ti. But still.

 

Either way, we all agree, waiting is a good idea. 

 

 

I have seen over 380W from my card, not all that difficult either..... 2080Ti....

 

 

[LIGISTX]

2 minutes ago, Ankerson said:

 

 

I have seen over 380W from my card, not all that difficult either..... 2080Ti....

 

 

That’s about what my entire system draws in games.... from the wall. CPU is 1.34ish vrvout. GPU is max power limit but no voltage tweaking as it didn’t change much. That’s insane just the GPU is pulling that amount of wattage. Maybe a ti can suck down a lot more power. For more perspective, my 8700k @5ghz, same GPU did about 360-380 in games, for the entire system. Lol. 

[Ankerson]

14 minutes ago, LIGISTX said:

That’s about what my entire system draws in games.... from the wall. CPU is 1.34ish vrvout. GPU is max power limit but no voltage tweaking as it didn’t change much. That’s insane just the GPU is pulling that amount of wattage. Maybe a ti can suck down a lot more power. For more perspective, my 8700k @5ghz, same GPU did about 360-380 in games, for the entire system. Lol. 

 

 

Have to realize what I have....

 

The EVGA FTW3 Ultra 2080Ti the higher clocked one..... It's the custom PCB.....

 

Yeah, it can draw a lot of power..... A lot of power..... Reason why EVGA recommends a 750W PSU for that card....

 

Reason why I beat my head against the wall when I see some people under recommending PSU wattage for some of these machines...

[LIGISTX]

18 minutes ago, Ankerson said:

 

 

Have to realize what I have....

 

The EVGA FTW3 Ultra 2080Ti the higher clocked one..... It's the custom PCB.....

 

Yeah, it can draw a lot of power..... A lot of power..... Reason why EVGA recommends a 750W PSU for that card....

 

Reason why I beat my head against the wall when I see some people under recommending PSU wattage for some of these machines...

I guess I’m just surprised it’s literally pulling the max possible power it can pull. 350-375 is the max the specs of a dual 8 pin cars cal pull, and nvidia doesn’t exceed those (unlike amd...). I have a custom PCB ftw3 1080 as well, built on the custom ti’s PCB. Granted, not a ti.... but it pulls about the same as my 2080 does. So, anyways. I guess to sum up the point, to warrant over a 750w PSU, your GPU would need 3 8 pin power cables. Only LN2 focused cards have that, and will only draw that under LN2. 

[Ankerson]

10 minutes ago, LIGISTX said:

I guess I’m just surprised it’s literally pulling the max possible power it can pull. 350-375 is the max the specs of a dual 8 pin cars cal pull, and nvidia doesn’t exceed those (unlike amd...). I have a custom PCB ftw3 1080 as well, built on the custom ti’s PCB. Granted, not a ti.... but it pulls about the same as my 2080 does. So, anyways. I guess to sum up the point, to warrant over a 750w PSU, your GPU would need 3 8 pin power cables. Only LN2 focused cards have that, and will only draw that under LN2. 

 

You know the cards are pulling 75W from the PCIE slot on the MB, so it's not all coming from the PCIE cables... So if it's drawing 380W that's really only 305W from the PCIE cables...

[LIGISTX]

2 minutes ago, Ankerson said:

 

You know the cards are pulling 75W from the PCIE slot on the MB, so it's not all coming from the PCIE cables...

Yea... 150w per 8pin, 150x2+75 = 375... what you said your card pulls. Lol. Thus my: “surprised it’s pulling the max possible power of a dual 8 pin card”. 

[Ankerson]

16 minutes ago, LIGISTX said:

Yea... 150w per 8pin, 150x2+75 = 375... what you said your card pulls. Lol. Thus my: “surprised it’s pulling the max possible power of a dual 8 pin card”. 

 

Optimized for max performance... I am not upgrading from what I have for a couple more years anyway.... Figure 3 years or more out of it.... I play at 1440P so I have a awhile yet.... No need to go with 4K on the PC...

 

The 2080Ti Kingpin has 3x PCIE 8 pin connections so that one is different... And crazy....