HD 5770 or HD 6850

[luquiboyn]

Hello:

I'm going to upgrade my GPU (currently a 9500GT) to a 5770 or a 6850. I know the second one is a lot more powerful, but the problem comes with my PSU. I've a 650W generic PSU with 28A in the 12V rail. I've used an online power calculator and it gave me this results:

-5770: Minimum:281W Recommended: 331W
-6850: Minimum:306W Recommended: 356W

I haven't got enough money for buying the GPU + A new PSU, so I want to know if I could run the 6850 or I have to stay with the 5770 (which is 30€ cheaper)

Thank you very much

 

[geekapproved]

I have to question why your not concerned about using a generic psu, I mean I guess you don't care about your cpu, motherboard, ram etc?

The 6850 is slightly faster than a 5770. Either way you should be ok.

Also consider a 7750, it doesn't even require pci-e power connectors.

 

[luquiboyn]

I have to question why your not concerned about using a generic psu, I mean I guess you don't care about your cpu, motherboard, ram etc?

The 6850 is slightly faster than a 5770. Either way you should be ok.

Also consider a 7750, it doesn't even require pci-e power connectors.

The answer is easy: Now I haven't got the money to buy a new PSU. And if my PC runs with mine, it's OK. But I know it's not the best thing using generics, so in the future I think I will change it.

On the other hand, I didn't understand your answer. Would the 6850 work or not?

 

[absxiith]

If it helps,the 5770 uses 108w under max load and the 6850 uses 127w under max load. http://www.gpureview.com/show_cards.php?card1=615&card2=636

But,I am not sure you would be able to run any of these two on a generic PSU.If you can't buy a PSU+6850,then you can go for the 5770(+ Corsair CX 430 for 26 euros.).Hope this helps.

 

[luquiboyn]

If it helps,the 5770 uses 108w under max load and the 6850 uses 127w under max load. http://www.gpureview.com/show_cards.php?card1=615&card2=636

But,I am not sure you would be able to run any of these two on a generic PSU.If you can't buy a PSU+6850,then you can go for the 5770(+ Corsair CX 430 for 26 euros.).Hope this helps.

Bad news Where did you find that Corsair PSU? Because I can't find it anywhere.

 

[absxiith]

Don't laugh but I found it here- http://www.ebay.com/itm/NEW-Corsair-Memory-CMPSU-430CXV2-Builder-Series-CX430-V2-Power-supply-430-W-/320891969630?pt=PCA_UPS&hash=item4ab6a6e05e .I simply converted the price to euros and hurriedly posted.Very sorry for that.

 

[luquiboyn]

Oh no! XD
I supose I will have to look for something similar here in Spain.
I've found Tacens and Nox PSU at an afordable price, but I think they aren't very good brands, am I wrong or not?

 

[luquiboyn]

Oh no! XD
I supose I will have to look for something similar here in Spain.
I've found Tacens and Nox PSU at an afordable price, but I think they aren't very good brands, am I wrong or not?

 

[luquiboyn]

I forgot to ask another question, what could happen if I try any of the cards with my PSU and it doesn't have enough power??

 

[absxiith]

http://www.tomshardware.com/forum/322966-28-list-recommended-psus

http://www.tomshardware.com/reviews/power-supply-psu-review,2916.html

To be honest, I didnt read them when I bought my CoolerMaster eXtreme Power Plus 460w but these should help you.

 

[jsc]

. I've a 650W generic PSU with 28A in the 12V rail.

Are you sure? 28 amps from a 650 watt PSU is pretty pitiful, even for a generic.

Are you sure there is not a second 12 volt figure listed. And usually if you look down at the lower part of the PSU label, you will see a total wattage figure listed for the 12 volt output.

A CX430 has a 28 amp 12 volt rail. So the only real difference is that the CX is a more modern design and probably better built.

A PSU that can product 28 amps at 12 volts adequately power either video card.

Main symptom of inadeqate power in a gaming machine is usually seemingly random reset/reboot cycles during gaming when the load is highest on the PSU.

 

[luquiboyn]

I've seen another time the PSU's specs, and it sais 28A and only one rail, but below it is written to have 426W on the 12V. It's strange, because if I multiply 12*28 it's not that wattage.

On the other hand, if I can try the GPU without risk of breaking anything because of lack of power, and if you say it should work, I will give it a try.

 

[luquiboyn]

http://www.tomshardware.com/forum/322966-28-list-recommended-psus

http://www.tomshardware.com/reviews/power-supply-psu-review,2916.html

To be honest, I didnt read them when I bought my CoolerMaster eXtreme Power Plus 460w but these should help you.

Thank you dude, I will use them if I have to change the PSU

 

[luquiboyn]

http://www.tomshardware.com/forum/322966-28-list-recommended-psus

http://www.tomshardware.com/reviews/power-supply-psu-review,2916.html

To be honest, I didnt read them when I bought my CoolerMaster eXtreme Power Plus 460w but these should help you.

Thank you dude, I will use them if I have to change the PSU

 

[luquiboyn]

If it helps to someone with the same doubt, I finally bought a HD5850 and it works like a charm with my 650W generic PSU. So any of the previous cards should work perfectly, as they drain less power.