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I have a Gigabyte 2AC8. (2.0, 3.0 question)

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February 17, 2013 5:58:48 PM

Hi, I have a Gigabyte 2AC8 which has 1 * PCI Express x16 (2.0). I am wondering if I buy a 7870 which is a 3.0 card, will it work fine on my 2.0 motherboard. I'm pretty sure its backwards compatible and I read a few threads here that says its fine, but just to make sure I'm going to ask :) 

More about : gigabyte 2ac8 question

a c 487 V Motherboard
February 18, 2013 2:14:08 AM

yes it will work... at 2.0 speed of course. but that is no handicap as no card yet made can saturate the v2.0 slots at x16 bandwidth.
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February 18, 2013 3:29:47 AM

Thank you for your reply, I will be buying the 7870 :) 
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a c 487 V Motherboard
February 18, 2013 6:10:42 PM

rockdude16 said:
Thank you for your reply, I will be buying the 7870 :) 

Make sure you PSU is capable of that card. The HD 7870 requires 161W at max demand. That relates to about 13.4A on the +12V rail.
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February 18, 2013 6:42:04 PM

clutchc said:
Make sure you PSU is capable of that card. The HD 7870 requires 161W at max demand. That relates to about 13.4A on the +12V rail.


Yeah I was planning on buying a new PSU at the same time since I currently have a 300w power supply. I was going to buy a 700w power supply but would you recommend any good ones that are < $100?
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a c 487 V Motherboard
February 18, 2013 6:59:18 PM

Here is all Newegg has at 700W and between $75 - $100 listed in order of best ratings:
http://www.newegg.com/Product/ProductList.aspx?Submit=E...

If you can spend a bit more, I would recommend an Corsair. This one is only a little more than your limit.
http://www.newegg.com/Product/Product.aspx?Item=N82E168...

The better brands are Corsair, Seasonic, XFX, and some Rosewills. You really are over doing it with a 700W since you can't add a 2nd graphics card to that board. Any 600W - 650W would be more than enough.
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