really need to know how many amps a 1gb gddr5 r7 240 uses

nathansnider6 · Feb 25, 2014

really need to know how many amps this card needs http://www.newegg.ca/Product/Product.aspx?Item=N82E16814103252 i've heard 12 but i have also heard 18 and i need to know soon thanks

getochkn · Feb 25, 2014

The 240 doesn't even use external power, so it shouldn't be much. I see about a 60w power draw/12 volts=5 amps.

nathansnider6 · Feb 25, 2014

getochkn :

you see 6o watts? i thought it was 30 where did you get your numbers? thanks

getochkn · Feb 25, 2014

Sorry, it was 30.

http://www.hwcompare.com/15156/radeon-hd-7750-vs-radeon-r7-240/

So 30/12=2.5amps but it doesn't use external power so it draws that from the PCIe slot alone.

nathansnider6 · Feb 25, 2014

getochkn :

okay but doesnt 2.5 amps seem really low im pretty sure the hd 6570 uses 18amps so do you think i can run this card on my psu which has 1 12v rail with 14amps?

getochkn · Feb 25, 2014

Yes, because it needs external power, so it needs 18amps from the 12v rail. the 240 doesn't need external power. It draws the power from the PCIexpress slot. There is no 12v draw for the 240, period. No external power.

hunter315 · Feb 25, 2014

A 6570 doesn't require 18A for itself, that would be 216W which is about as much as a 7870 consumes. The 18A is the recommended power for the entire system, the 240 will need about 2.5A for itself but the PSU still has to power the rest of the system and your CPU can consume up to 12A from the 12V rail depending on what you have(this ignores the dumb 200W+ AMD chips)

nathansnider6 · Feb 25, 2014

hunter315 :

do you think i can run this card i have a intel core 2 duo e7500, 1 7200rpm hdd, 1 stick of ddr3 ram 4gb and a dvd drive and i would replace my old gpu with this card my old gpu being a 8400gs 1gb overclocked and my psu being 235 watts and 1 12v rail with 14amps

getochkn · Feb 25, 2014

Yes, it will run fine. It doesn't need external power, therefore your 12v rail is sort of not needed. It draws the power the PCIe slot. This slot by design provides a minimum amount of power.

I hate trying to repeat myself, but there is no external power needed for that card. You're looking at this the wrong way

nathansnider6 · Feb 25, 2014

getochkn :

so if i buy this card you can pretty much gaurentee i can run it? and is their any diffrnece in power consumption between gddr3 and gddr5 versions?

hunter315 · Feb 25, 2014

getochkn :

That is incorrect. The external power connectors are to provide additional power to the card over the 75W that the PCI-e slot can provide, a card can pull about 6A from the 12V rail via the PCI-e slot, the 8400 GS was a 40W or 25W card(2 versions) so it doesn't need an external power connector, but i wouldn't go and replace it with a 7750 that needs 75W but also has no power connector simply on the basis that it has no external power connector.

The R7 240 will use about the same amount of power as the 8400 GS so you will be fine, but it isn't because the PCI-e slot provide a minimal amount of power, it actually provides a rather large amount of power for a peripheral slot.

getochkn · Feb 25, 2014

hunter315 :

Yes, I understand that it does draw it from the 12v rail to supply the PCIe express slot, but as you said, its spec say it has to deliver 75w which is enough for this card. I'm just trying to get the OP off the idea that they need extra power, they don't. The PCIe slot will provide enough power to that card without anything else and that card doesn't need extra power from the PSU,

nathansnider6 · Feb 25, 2014

getochkn :

hunter315 :

Yes, I understand that it does draw it from the 12v rail to supply the PCIe express slot, but as you said, its spec say it has to deliver 75w which is enough for this card. I'm just trying to get the OP off the idea that they need extra power, they don't. The PCIe slot will provide enough power to that card without anything else and that card doesn't need extra power from the PSU,

thanks alot guys i dont know who to chose for best answer

nathansnider6 · Feb 25, 2014

getochkn :

hunter315 :

Yes, I understand that it does draw it from the 12v rail to supply the PCIe express slot, but as you said, its spec say it has to deliver 75w which is enough for this card. I'm just trying to get the OP off the idea that they need extra power, they don't. The PCIe slot will provide enough power to that card without anything else and that card doesn't need extra power from the PSU,

oh 2 other quick questions since this card is a gddr5 version does it use more watts than its ddr3 version and since its slightly overclocked i think from 730-780 mhz does that make much diffrence in terms of power?

nathansnider6 · Feb 25, 2014

getochkn :

hunter315 :

Yes, I understand that it does draw it from the 12v rail to supply the PCIe express slot, but as you said, its spec say it has to deliver 75w which is enough for this card. I'm just trying to get the OP off the idea that they need extra power, they don't. The PCIe slot will provide enough power to that card without anything else and that card doesn't need extra power from the PSU,

oh 2 other quick questions since this card is a gddr5 version does it use more watts than its ddr3 version and since its slightly overclocked i think from 730-780 mhz does that make much diffrence in terms of power?

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really need to know how many amps a 1gb gddr5 r7 240 uses

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