450w and rx Vega 56?

[PLOB]

I have an SF450 80+ gold and an r5 1400, would i be fine use a Vega 56 if i undervolted it a little?

[Omega]

I wouldn't risk it.

[Autumn_]

I'm gonna go ahead and say no; I wouldn't do it.

And the R5 1400 is bottlenecking the Vega 56 quite a bit.
And you should always undervolt the Vega series.

[PLOB]

i dont want to have to upgrade my psu though : /

[Sapph]

Even after quite heavy undervolt, you would still be looking more than 300W of total system usage. So 450W would be enough, but it would be really close maxing out.

[TehSpoopyKitteh]

Αναρτήθηκε αρχικά από Sapph:

Even after quite heavy undervolt, you would still be looking more than 300W of total system usage. So 450W would be enough, but it would be really close maxing out.

In short, it is too much of a risk and the OP should use a 550Watt PSU or better.

[Ralf]

Seasonic Focus Plus 550W restarts with Vega, so yeah 450W is totally safe. https://knowledge.seasonic.com/article/20-focus-plus-and-gpu-potential-compatibility-issues

[PLOB]

https://www.ebuyer.com/716706-evga-650w-g2-fully-modular-80-psu-220-g2-0650-y3?fo_c=951&fo_k=8464155c5ee5648dd23d016f3e585f68&fo_s=webgains&wgu=267255_206719_15431668708201_7c4e5c100d&wgexpiry=1550942870&utm_source=webgains&utm_siteid=206719

this would be fine, right?

[Bad 💀 Motha]

Αναρτήθηκε αρχικά από Plob:

i dont want to have to upgrade my psu though : /

You should have gotten a Gold 550W or better from the very start.
As cheap as good PSUs are these days, why buy a lesser one?

[TehSpoopyKitteh]

Αναρτήθηκε αρχικά από Bad 💀 Motha:

Αναρτήθηκε αρχικά από Plob:

i dont want to have to upgrade my psu though : /

You should have gotten a Gold 550W or better from the very start.
As cheap as good PSUs are these days, why buy a lesser one?

In the OP's defense, with all the "it consumes only this much, that 450 Watt PSU will be fine" talk we see here, it is easy to see where the OP would get confused.

[Monk]

That's plenty the Vegas aren't anywhere near as bad as people think.

[Monk]

Just to really prove how wrong people are here, I have just been benchmarking with my vega 64 and 9900k, they pulled an ENORMOUS 350w from the wall.

So, really, I don't think a 1400 and a vega 56 will have to much of an issue.

[Omega]

With my Vega 64 and i7 5820k I see peeks of 550w being pulled from the wall.

[Monk]

Stock or overclocked? I'll run a few more tests to check, but I should add my test was at stock on both in unigine heaven as it was the easiest to leave running.

I'll go check with firestrike and superposition now and report back.

[Omega]

GPU stock, CPU overclocked.


Maybe run both Prime95 and Furmark at the same time and see what the power usage is like then.

[Monk]

Why, that's a ridiculous use case, I guess the 9900k is just Way more efficient than we all thought, boosting all cores to 4.8 it seems, so far, heaven (1080p), superposition (1080p extreme and 4k optimised) and firestrike all come in around 350w with only the extreme final test of firestrike pulling just 400w momentarily from the wall.

so on a evga supernova g2 1000w (huge overkill but I already had it and only paid £80 for it new) which is around 90% efficient to make life easy, that means my system, with a 9900k boosting to 4.8 all cores (according to hw monitor thought it was only meant to boost to 4.7, hmm) and a stock vega 64 is using between 315w to 360w under benchmark load.

Remember that HEDT chips use ALOT more power, my 7900x with sli 1080ti overclocked uses 450w idle and 8-900w under load.

So unless OP goes messing with custom bios I suspect he would be fine even overclocking the vega 56 and r3 1400 on his psu.

Edit.

These benchmark tests are far more realistic than running two torture tests similtaneously.