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Will a AMD Phenom ii 840t processor be able to handle an AMD 7870 card?

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February 15, 2014 5:25:37 PM

I have a AMD Phenom ii 840t processor and my friend is giving me a AMD 7870 card but he said there might be some issues with the card and processor together, like bottle necking or overclocking. He also said i need a separate power supply but dont know if i have one already.Do i need a power supply for a card like that and how do i check if i already have one? Thanks
a b à CPUs
a b ) Power supply
February 15, 2014 5:57:25 PM

well you should have a power supply already because without one your current computer wouldn't even turn on?

open up your computer and check the sticker on the power supply box, it should give you ratings like +12V@??A etc, and things like the 12V rails combined shall not exceed ??? Watts or something similar, we need the information to give you an answer

And yes there will be some slight bottleneck because your processor is old while a 7870 is a fairly decent mid ranged graphics card, but it'll be fine, it's not as if your computer will blow up by pairing the two, just that your graphics card won't run as fast as it is capable of, because the processor is slowing it down a bit.
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February 15, 2014 6:10:56 PM

lmaonade200 said:
well you should have a power supply already because without one your current computer wouldn't even turn on?

open up your computer and check the sticker on the power supply box, it should give you ratings like +12V@??A etc, and things like the 12V rails combined shall not exceed ??? Watts or something similar, we need the information to give you an answer

And yes there will be some slight bottleneck because your processor is old while a 7870 is a fairly decent mid ranged graphics card, but it'll be fine, it's not as if your computer will blow up by pairing the two, just that your graphics card won't run as fast as it is capable of, because the processor is slowing it down a bit.


alright ill check right now
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Related resources
February 15, 2014 6:15:09 PM

lmaonade200 said:
well you should have a power supply already because without one your current computer wouldn't even turn on?

open up your computer and check the sticker on the power supply box, it should give you ratings like +12V@??A etc, and things like the 12V rails combined shall not exceed ??? Watts or something similar, we need the information to give you an answer

And yes there will be some slight bottleneck because your processor is old while a 7870 is a fairly decent mid ranged graphics card, but it'll be fine, it's not as if your computer will blow up by pairing the two, just that your graphics card won't run as fast as it is capable of, because the processor is slowing it down a bit.


Internal 250W (100-240V)
Form factor: internal ATX
Total Wattage: 250W
Nominal input voltage range:
100-127V ~6A
200-240V ~3A
Dimensions: 150mm x 140mm x 86mm (5.9 x 5.5 x 3.4 inches)

i found this on a website that had my computer on it
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Best solution

a b à CPUs
a b ) Power supply
February 15, 2014 6:20:30 PM

hmm okay, 250W is not going to cut it for a 7870, if you want to use it you should definitely replace the power supply, this will require some research on your part on which connectors connect to what, how to mount it to the case, etc. so be prepared if you're willing to do it.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

something like this is probably your best bet, it's cheap, 20 bucks after MIR, and is immensely better than most generic factory PSUs, and is a pretty decent quality PSU in it's own right.
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a c 177 à CPUs
a b À AMD
February 15, 2014 6:24:04 PM

That psu will not power everything once the 7870 is added and probably does not have the proper connections for it. To use it you will need a new power supply and i would say a 500watt from a good brand will do it. I would go corsair cx500 for the pricing, a nzxt 550watt Hale82, or xfx 550watt or rosewill hive 550watt all ranging from $60-80 and the best probably being the xfx 550watt $70, the corsair is $60, and the NZXT Hale82 is $50 on sale it seem at Newegg

There will be some bottleneck as the clock speed of the cpu, but it should surely be better than what you are using now so it will still be a big improvement if its free or for a good price. Also if ur go get a newer motherboard minimum to overclock for better performance would be the asus m5a97 R2 not LE, or gigabyte g97a-ud3/ud3p and overclock if ur friend would do it for u and possibly unlock that 840t x4 to an x6 six core as the T in the naming stands for Thuban which is the six core cpus.
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February 15, 2014 6:25:43 PM

lmaonade200 said:
hmm okay, 250W is not going to cut it for a 7870, if you want to use it you should definitely replace the power supply, this will require some research on your part on which connectors connect to what, how to mount it to the case, etc. so be prepared if you're willing to do it.

http://www.newegg.com/Product/Product.aspx?Item=N82E168...

something like this is probably your best bet, it's cheap, 20 bucks after MIR, and is immensely better than most generic factory PSUs, and is a pretty decent quality PSU in it's own right.


cool so all i need to do is get this power supply and ill be able to run this card, i just need a 20 dollar power supply for a free 200 dollar card lol.
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a b à CPUs
a b ) Power supply
February 15, 2014 6:32:14 PM

pretty much, better cards need more power and more/extra connectors, most pre-built PSU's don't have the required anything to run powerful graphics cards because those computers are usually designed for casual consumer use.
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February 15, 2014 6:36:10 PM

lmaonade200 said:
pretty much, better cards need more power and more/extra connectors, most pre-built PSU's don't have the required anything to run powerful graphics cards because those computers are usually designed for casual consumer use.


so what would be the right wattage for that card im willing to spend what is needed
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a b à CPUs
a b ) Power supply
February 15, 2014 6:38:59 PM

the one i listed will be fine, if you want to be cautious just go for a nice 500W, a Corsair CX500 will be fine also but it'll also cost much more since it's not on a deal like the 430W is
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a b à CPUs
a b ) Power supply
February 15, 2014 6:41:19 PM

it's only 20 dollars because of a mail in rebate, it's a Corsair CX430 which is of decent quality and will not cause any problems with a 7870
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a b à CPUs
a b ) Power supply
February 15, 2014 6:46:46 PM

it's enough but it's also really bad, since it's a low quality PSU that can only supply 500W at 65% efficiency on full load, might as well go for the Corsair I linked earlier, it can supply 430W at 82% efficiency on full load so it'll actually be more than that one can provide.

http://www.tomshardware.com/answers/id-1804779/power-su...

refer to this list, I would say do not go below tier 3 for a quality PSU
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a c 177 à CPUs
a b À AMD
February 15, 2014 6:49:35 PM

Ah, did not see u mention the cx430 lol, not sure if the 7870 uses two 6 pin pci-e connectors but i think the cx430 only has one, and its just me but id rather have the cables there than use molex adapters. Also the nzxt 550 is same price as the cx430M and like $5 more than the cx430 non modular.
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February 15, 2014 7:37:42 PM

yeah the 7870 takes 2 pin pci-e connectoers
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