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3080 power supply

i stand my ground on this one. its not just about how many spare watts you should have, that's up to you. It's all about the QUALITY of the components inside the PSU. Lifespan and component protection is what you want.
You get what you pay for at the end of the day.
 
GPU5eek3r said:
i stand my ground on this one. its not just about how many spare watts you should have, that's up to you. It's all about the QUALITY of the components inside the PSU. Lifespan and component protection is what you want.
You get what you pay for at the end of the day.
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Very true, just cos its 750W is no safeguard. Cheapo stuff with a 50A single rail would be a problem. The OP's CM should be ok if its 60A+?
 
Quality v Watts? An excellent psu like the Seasonic 650W Prime was tested by Kitguru and shut down just shy of 800W. Mind you titanium and pricey. Loads of 650W psu's would fail with a 3080.
 
Wattage doesn't matter.

You need two dedicated 6+2 pin power connectors.

Try to run a 3080 on a Corsair CV750 with its daisy chain connectors off a single cable, and your entire rig is going to explode.
 
I've got a Corsair Vengeance 650W at the moment and am assuming it's going to be OK to run a 3080? Worst case I'm guessing it will effectively turn off at peak load? i.e. there's minimal chance of damage if it does go over what the PSU can supply? I used to be really up on my PC components many years ago, but I'm so out of touch with it all now!
 
ArosaMike said:
I've got a Corsair Vengeance 650W at the moment and am assuming it's going to be OK to run a 3080? Worst case I'm guessing it will effectively turn off at peak load? i.e. there's minimal chance of damage if it does go over what the PSU can supply? I used to be really up on my PC components many years ago, but I'm so out of touch with it all now!
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Of course it isn't:

https://images-na.ssl-images-amazon.com/images/I/61gMu2NWeoL._AC_SL1200_.jpg

You only have a single PCI-E power cable unless you somehow aren't using a CPU.

Worst case scenario isn't that it will simply switch off under load, even if your total PC usage doesn't reach 650w, a single PCI-E cable output cannot safely deliver 300w+ or power to the GPU. The least case scenario is that the cable will get fried. Second the GPU might get killed. Third your PSU might divert power regulation from other parts of the system to feed the GPU and the whole system goes boom.

Well I forgot about the semi modular part, if theres also another PCI-E cable on the hard wired cables then it should be OK.
 
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BallistixOnZ490 said:
Of course it isn't:

https://images-na.ssl-images-amazon.com/images/I/61gMu2NWeoL._AC_SL1200_.jpg

You only have a single PCI-E power cable unless you somehow aren't using a CPU.

Worst case scenario isn't that it will simply switch off under load, even if your total PC usage doesn't reach 650w, a single PCI-E cable output cannot safely deliver 300w+ or power to the GPU. The least case scenario is that the cable will get fried. Second the GPU might get killed. Third your PSU might divert power regulation from other parts of the system to feed the GPU and the whole system goes boom.

Well I forgot about the semi modular part, if theres also another PCI-E cable on the hard wired cables then it should be OK.
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I'm already running an RTX2060 Super which has a direct power supply so unless I'm missing something really obvious, I'd assumed that must fundamentally be a direct swap?
 
ArosaMike said:
I'm already running an RTX2060 Super which has a direct power supply so unless I'm missing something really obvious, I'd assumed that must fundamentally be a direct swap?
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No, RTX 3000 cards require a lot more power than previous gen cards. Any that feature the new 12 pin connector on the FE now require two separate dedicated PCI-E cables (for AIB's with old style connectors too), not a single cable daisy chained into two.

Check if your PSU has a separate PCI-E cable on the hard wires on top of the modular one, as long as there's two separate cables its fine, I couldn't find any info on which cables it has on the hard wired part unfortunately.

Basically as a minimum, you now need to ensure two separate outputs and cables for PCI-E regardless of the wattage output of the PSU. Older gen cards that required two connectors could still work fine with a single cable split into two at the end as they didn't use as much power as the new ones do.
 
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To answer op anyway.. yes it will be fine.. is the simple answer. A 750w cooler master is by no means a bottom of the bunch budget unit.
 
Most mid to high end psu will have the correct connectors.
If you go for a fully modular unit you’ll be laughing.
I would always recommend Seasonic as a trusted brand.
 
GPU5eek3r said:
Most mid to high end psu will have the correct connectors.
If you go for a fully modular unit you’ll be laughing.
I would always recommend Seasonic as a trusted brand.
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Sorry, i meant the nvidia 8 pin out of the box, couldn't find any from Seasonic that had them. I know they come with adapters but it'd be nice to have it clean and tidy.
 
alindl said:
Sorry, i meant the nvidia 8 pin out of the box, couldn't find any from Seasonic that had them. I know they come with adapters but it'd be nice to have it clean and tidy.
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All PSUs today have the standard 6+2 pin PCI-E connectors, you just need two separate cables for RTX 3000 series cards including for an FE using the bundled 1x8 pin > single new 12 pin converter.

What you don't want to be doing anymore is using a cable like this to plug into two GPU power inputs:

https://cwsmgmt.corsair.com/pdp/cv-2019/images/cv_cables_pcie.png
 
turbot1984 said:
Quality v Watts? An excellent psu like the Seasonic 650W Prime was tested by Kitguru and shut down just shy of 800W. Mind you titanium and pricey. Loads of 650W psu's would fail with a 3080.
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Yes, the fact that Seasonic Prime was Titanium rated is probably a more useful thing to note rather than just the absolute wattage.

While nothing is impossible, and assuming we can trust the results of the 80 Plus rating, then it is worth bearing in mind that reaching Titanium rating requires having a very good design. While penny-pinching manufacturers who know what they are doing could probably take that good design and put in some questionable components at the prices these supply demand that is less likely.

Still to be safe and while tedious, I think reading full PSU reviews by reviewers who know what they are doing is the only reasonable safe thing to do especially with how expensively overpriced GPUs are at the moment.
 
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