Power supply for two 5770 in Crossfire

[miguelmt8]

Well, you see, I'm planning to pair a 5770 with the one I already have, and my ''600W'' power supply from a strange brand that no one knows about hums a lot if I ask it for any effort, so I don't trust it at all.

Could you tell me roughly what power I need?
And... the other 5770 needs to be from the same manufacturer? Mostly because of the difficulties I have finding the same one.

Best regards, thanks.

PD: if possible with a price around 60€ or less.

[krampak]

And… the other 5770 needs to be from the same manufacturer? Mostly because of the difficulties I have finding the same one.

It doesn't have to be from the same manufacturer, in fact it doesn't even have to be the same model, you can do a CrossFire between a 5770 and a 5750, you just need them to be from the same'series'.
As for the power, 600-650W should be enough for that CrossFire, as long as it's of acceptable quality (Seasonic, Corsair…).

@Tomshardware:

Core i7 965 @ 3750 MHz (3.6 + Turbo mode) + 5770 CrossFire

System in IDLE = 249 Watts (= 21W added over single GPU)
System with GPU in FULL Stress = 423Watts
Difference (GPU load) = 174 Watt

Edit: I see that you have added a budget of 60€, for that price keep the noise of your current power supply The most economical and decent thing I see around that is the Corsair CMPSU-600CXV2 (value range) and even so it will cost you 70€. A power supply is a good investment, I have been using the same Antec 850W for years.

[miguelmt8]

@krampak:

You don't have to be from the same assembler, in fact, you don't even have to be the same model, you can do a CrossFire between a 5770 and a 5750, you just need them to be from the same'series'.
As for the power, 600-650W should be enough for that CrossFire, as long as it's of acceptable quality (Seasonic, Corsair...).

Edit: I see that you have added a budget of 60€, for that price, keep the noise of your current power supply

Well I'm not staying with that, and I'm sacrificing the ram that I'm barely managing with the current one. I'll start looking, thanks for the answer

http://www.appinformatica.com/fuentes-alimentacion-fuente-nox-nx-series-620w-pfc-activo-120-red-fan.php

I've seen this one, and for being a NOX of 48€ it has convinced me, but I don't know how to look beyond the Watts, that's why I ask for help, I don't want to get one that gives me 150W less.

Best regards

[Tecnho]

Those 2 graphics are not very expensive but the power supply is the most important component of a pc, and it is better that you wait and save some money to buy that, aspects to look for in a power supply are the amperage it gives you on the 12v line, the certificates it has, if it has active PFC better, and also a little comparisons and reviews it doesn't hurt to compare, if you need a power supply for that look for brands like Corsair, Antec, OCZ the ocz are usually a bit more economic and decent, and corsair you have the Gs range which is cheap and I suppose they come out well, but in prices you will have between about 80 and 120€ in that range you have pretty good power supplies.

[Sylver]

@Tecnho:

Those 2 graphics are not very power-hungry but the power supply is the most important component of a PC, and it's better to wait and save some money to buy that, aspects to look for in a power supply are the amperage it gives on the 12v line, the certifications it has, if it has active PFC better, and also a little bit of comparisons and reviews it doesn't hurt to compare, if you need a power supply for that look for brands like Corsair, Antec, OCZ the ocz usually are a bit more economic and decent, and corsair you have the Gs range which is cheap and I suppose they come out well, but prices will be between about 80 and 120€ in that range you have pretty good power supplies.

+1

It is essential to invest in the power supply for a good power supply of the equipment, since if the power supply is generic/bad any voltage spike can send half the equipment to the trash if it doesn't send the whole thing.
When it comes to a crossfire it is much more important, knowing that although as Tecnho rightly says they are not power-hungry the consumption will increase and it is convenient that the supply on each line is adjusted and stable.

I don't have crossfire, although I have an OCZ ModXtream of 500W modular that gives me excellent performance and cost me very cheap, so with a 600W from the same brand you will have enough for your equipment.
A Corsair would be an even better choice, although prices go up quite a bit.

Regards

[miguelmt8]

@Sylver:

+1

It is essential to invest in the power supply for a good power supply of the team, since if the power supply is generic/bad any voltage spike can send half the team to the trash if not the whole team.
In the case of a crossfire it is much more important, knowing that although as Tecnho rightly says they are not greedy graphics the consumption will increase and it is convenient that the supply in each line is adjusted and stable.

I don't have crossfire, although I have an OCZ ModXtream of 500W modular that gives me excellent performance and cost me very cheap, so with one of 600W from the same brand you will have enough for your team.
A Corsair would be an even better choice, although the prices go up quite a bit.

Regards

I will take your advice, I have seen some GS from Corsair and they are at least around 80€, I will try to go for one of those, thanks

[Sylver]

This one would already be good for you: Corsair CX600 V2 600W CMPSU-600CXV2 Power Supply

Greetings

[miguelmt8]

@Sylver:

This one would already be good for you: Corsair CX600 V2 600W CMPSU-600CXV2 Fuente

Regards

I will take it into account, although you won't know one by APP, right? for the shipping at pccomponentes they charge me 10€ more or less and along with the cash on delivery perhaps that source rises to 80€, I know that by APP it is more difficult, but well, if there is none there I will get it from pccomponentes.
It is that at APP I pay the price that is on the website, I wait 4 days and pick it up at the store that I have next to my house.

Anyway, if it is not there I am not going to take a risk like I already did with the one I have now and I will get that one.

Thanks

[Sylver]

I've been looking and the few that are similar cost much more expensive, there are also lesser-known brands at affordable prices, but I wouldn't take the risk.

Best regards

[miguelmt8]

@Sylver:

I've been looking and the few that are similar cost much more expensive, there are also lesser-known brands at affordable prices, but I wouldn't take the risk.

Regards

thank you very much, I'll follow your advice

Best regards!