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Can I crossfire 7770 1gb with 7770 2gb?

Last response: in Graphics & Displays
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December 26, 2013 3:27:33 PM

I can't find a resolute yes or no on this!
a c 367 U Graphics card
December 26, 2013 3:29:38 PM

2gb ddr3? If so you CAN but its not worth it. The weaker card will hold back the strong one (ddr3 will hold back ddr5)
If they are the same memory type then it will be limited to the card with less memory.
Its not a good idea to get crossfire low end cards, I would recommend a single strong card.
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a c 143 U Graphics card
December 26, 2013 3:31:44 PM

I think it will work, and it will behave as if both cards had 1 GB.
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a b U Graphics card
December 26, 2013 3:43:18 PM

I don't think they make 7770 with DRR3 that being said it will normally default to the slowest card speed and memory you will still only have 1 GB of Ram not really worth it unless your getting it for free. I would be best to just get a 280x or GTX 770 you could get a 270x as well.
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December 26, 2013 4:49:17 PM

Well I have the 1gb ddr5 version. Since I already own this card, jumping straight to a gtx770 for the cost isn't worth it for me, when I can spend 100$ for a 2nd identical card. I've seen some strong benchmarks from crossfired 7770's, and since I own one already, a 2nd one would make sense to me for the money and gains. I understand a 770 would work better, but I do have limited funds for these things.


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a c 367 U Graphics card
December 26, 2013 5:06:56 PM

What is the budget for the upgrade? A 770 would be good, but that is by no means your only option here. A 270/270x/760 is still a good upgrade.
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a c 143 U Graphics card
December 26, 2013 5:42:32 PM

jghaverty said:
Well I have the 1gb ddr5 version. Since I already own this card, jumping straight to a gtx770 for the cost isn't worth it for me, when I can spend 100$ for a 2nd identical card. I've seen some strong benchmarks from crossfired 7770's, and since I own one already, a 2nd one would make sense to me for the money and gains. I understand a 770 would work better, but I do have limited funds for these things.



Just FYI, you need a PSU rated 550W or larger.for HD 7770 CF
http://www.guru3d.com/articles_pages/amd_radeon_hd_7750...
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December 26, 2013 6:39:17 PM

Heres the deal, I have an older computer running an E5800. Works fine, but its limitations are quickly becoming apparent. I upgraded everything I could at the time, specs ->

e5800
unknown motherboard
16gb ram
15k 500gb raptor drive
750w PSU
Sapphire radeon 7770 1gb


I will be upgrading my CPU/MOBO here shortly, but I can squeeze in an extra graphics card if it will step up my performance a chunk. Since I Already OWN the 7770, I was thinking another one could be added to mix for a cost effective upgrade. Im not a pipe dreamer, Im aware of the limitations, however, on certain games I am playing, I see benchmark scores almost doubling (or more in some cases) the FPS which is huge. I wont get those gains without dropping 250$ on a new card, ala gtx 760.

Since im upgrade my cpu/mobo, that kinda kills any budget I have for the GPU, and Im thinking crossfiring two together will be the best solution over all, no?








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Best solution

a c 367 U Graphics card
December 26, 2013 8:12:28 PM

If you have to upgrade now on a budget, and wont have cash to upgrade any time soon then yes it is worth it. But if you spend more upgrading the cpu and a few months later upgrade the graphics overall it is better.
So its your call. If you can put more into it down the line, do it, if not, Xfire will help.
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December 26, 2013 9:07:29 PM

ok i will hold off for now. Upgrading the CPU/MOBO is most important right now!
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a b U Graphics card
December 27, 2013 9:59:49 AM

Yes thats I would do, make sure the new mobo supports CF/SLI atleast two 8x Pcie slots.
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