Another Decision to be made, 6870 or 7770 OC

About a week ago, i decided that the 6870 would be better for me than the 6850.
Now, i have a new dilemma.

This is the 6870 i was looking at:
http://www.tigerdirect.ca/applications/searchtools/item-details.asp?EdpNo=1241686&csid=_22

As i continue to look through TD, i noticed that the OC 7770's are at a similar price, but I don't know how well they perform.

Here are some that i was looking for (IN order)

1. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=2060890&CatId=7387
(Highest OC of the Dual fans, Double D edition)

2. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=2042279&CatId=7387
(Single Fan, Highest Overall Clock)

3. http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=2021921&CatId=7387
(OC, Dual fans)

To my understanding, the 7770 is newer, but has fewer SPU and a smaller memory interface.

Not my MOBO only supports PCI-E 2.0.

So which GPU is better, the 6870 or the 7770 OC'd?

And also, how much power will those GPU's use? I know the base 7770 uses less power than the 6770, but how much more power will the dual fans and OC require? I only have 2 18A 12v Rails (CM EP+ 600 watt)

Thanks!
4 answers Last reply
More about another decision made 6870 7770
  1. Why not get a 6870 that is better stock clock and overclock that so it is way better than an overclocked 7770.
  2. Why not get a 6870 that is better stock clock and overclock that so it is way better than an overclocked 7770.[/

    Forgot to mention i dont feel comfortable OC, either i buy OC or keep it at stock.

    And true, my friend offerd to buy Shogun for 20 + a Diablo guest pass.

    And how many Amps does that 6870 need? It says its Pre-Oced but thr speeds look the same. Most people say my PSU can easily run one but the quality isnt the best so idk
  3. Quote:
    A quality 380 watt PSU can handle the 6870.

    Use this:

    http://www.newegg.com/Product/Product.aspx?Item=N82E16817371033&Tpk=antec%20380


    My PSU has a larger 12V rail, so i should be fine.

    How many watts does a OC DD 7770 need?
  4. Im also looking at these two GPU's:

    http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=555335&cm_re=Homepage-_-Spot%2066-_-E145-1564

    and the 6870 2gb.

    I don't think i need 2gb VRAM, so mainly its 7770 vs 6870 vs 560 SC

    And is it hard to OC a GPU? I've never tried it before, only CPU's
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