Dedicated GPU purchase: CX430v2/i3-3220

amk-aka-Phantom

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Mar 10, 2011
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Hey guys,

A friend of mine got a desktop PC for free and is planning to add a dedicated graphics card to it. As of now, the specs are as follows:

Motherboard: Asus P8B75-M LX
CPU: Intel Core i3-3220
RAM: Corsair ValueSelect 4GB 1333 MHz DDR3
PSU: Corsair CX430v2
Case: Cooler Master Elite 311

First of all, this motherboard has a PCI Express 3.0 slot. Such a slot was a huge PITA in another build I did for a friend - it made a 2.0 card crash all the time on a brand new board, and in a replacement board, the only solution was to shift the card into the secondary 2.0 slot. Does anyone have experience with running dedicated graphics on this board? Any problems?

Second, the power supply somewhat limits the choices. It only has one PCI-E connector though IIRC, CX430v2 has something like 28A on its 12A rail, but I am still in doubt. Will this PSU manage to run cards such as:

1) Asus GTX 650 Ti 1GB
2) Asus GTX 650 1GB

Both of this cards require only one additional PCIe power connector and consume "up to 150 watts". Will they work with the current setup?

If anyone can suggest a similarly priced/performing AMD card, I'm open to it as well.

Thanks in advance!
 

clutchc

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The GTX 650ti would be a good choice. It can game at 1080p with near max settings in most games.
There should be no issue running a PCIe 2.0 card in a PCIe 3.0 slot or visa-verse. The Asus board should have no issues.

The GTX 650ti can demand up to 110W maxed out: http://www.hwcompare.com/13622/geforce-gtx-650-ti/
That relates to 9.2A on the +12V rail.

A faster choice would be an HD 7850. It demands 130W maxed out: http://www.hwcompare.com/12032/radeon-hd-7850/
...10.8A from the +12V rail. The i3-3220 is a 55W (4.6A) CPU, so you can possibly up your GPU choice if there's not much else in the system other than drives and RAM.
http://www.extreme.outervision.com/psucalculatorlite.jsp
 

amk-aka-Phantom

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7850 does indeed seem like a nice card, though all the version sold here require 2 PCIe power connectors :( Also, it's quite a bit more expensive than the 650 Ti. The only other two cards that I see close to 650 Ti from AMD are 7750 and 7770, both of which are either on par or lose out to 650 Ti in every benchmark except heavy computing - and since the GPU will be used just for gaming and not mining bitcoins, I guess I can forget about AMD...

Thanks for your reply, I think unless the budget gets expanded, we'll settle on the 650 Ti :)