XFX R7790 bashing

atom

Gawd
Joined
May 3, 2005
Messages
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So I bought this card on a budget with plans to just do some Crossfire later down the road. Now that I am getting to the point where I have some money to throw at that second card, I am noticing that there is no place to do a Crossfire bridge on this card! It says right on the stinking box it has Quad Crossfire support! I opened a ticket with XFX about two weeks ago and have received no reply. Just getting the word out there that you can not Crossfire this card.

In other news, the card is pretty decent.
 
The XFX dual fan 7790's do have a crossfire port, but the single fan CORE version does not, it appears.

I'm guessing you got have the single fan version? Because the [H]OCP review of the dual fan 7790 clearly shows a picture of the crossfireX port.
 
I know the Nvidia cards I've owned will not SLI without a bridge, however, I've had a few AMD cards that will let you enable crossfire without a bridge connected at all. I'm not sure if it hurts/helps performance not having a crossfire bridge, but I remember CCC did show 2 GPUs active in crossfire. I didn't do any extensive testing though. So YMMV, but may be something to look into.
 
Hello Atom, This card does have Crossfire support enabled. It uses a software crossfire without the need of the bridge. You will want to get a matching ZNJ4 so that the crossfire support is matching on both units.

Performance wise, you should get matching results compared to Bridge XFire setup.

You said you haven't received a response in 2 weeks on your support ticket, please PM with your ticket number so i may investigate this case. Our ticket turnaround time is typically 24-48 hours.

http://products.xfxforce.com/en-us/Graphics_Cards/AMD_Radeon™_HD_7790/FX-779A-ZNJ4

Thank you
 
Nice to have reps following the forums. I thought only the older cards like the 4670 had the SLI without Xfire bridge. Learning new things every day.
 
OP i would advise you to not spend USD 120 - 130 on another HD 7790. sell your existing HD 7790 for USD 80 - 100 and get a HD 7950.

HD 7950 crushes a HD 7790 CF solution.

http://www.hardocp.com/article/2013...790_turboduo_video_card_review/4#.Ujh_XX_3x8E

http://www.hardocp.com/article/2013...oc_gtx_760_overclocking_review/5#.Ujh_PH_3x8E

Tombraider 1920 x 1080 highest settings FXAA Tress FX

HD 7950(1150 mhz) - 68.4
HD 7790(1200 mhz) - 27.8

CF scaling in best cases is 1.8x. the HD 7950 OC is 2.5x the perf of HD 7790 OC. secondly CF is never going to match a single GPU in smoothness and consistency. thirdly HD 7790 cards come with 1GB VRAM which is a massive bottleneck. You cannot run the highest settings in latest games as you will run out of VRAM. its an easy decision. just sell the HD 7790 and get a HD 7950 :)

http://www.newegg.com/Product/Product.aspx?Item=N82E16814202026
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131458
http://www.newegg.com/Product/Product.aspx?Item=N82E16814131499
 
Thanks for your replies guys!

XFXSupport: In doing my research I have seen that some cards have software Crossfire, this however says right on the box that "a second AMD Radeon HD 7700 Series graphics card, an AMD CrossFireX Ready motherboard and one AMD CrossFIreX Bridge Interconnect cable is required." This is part of why I am so confused. I do appreciate your reply and the information you have provided, I am however a little reluctant to try a software Crossfire in fear that the performance may be less and/or unsupported by certain games.

Also, I see now that my ticket was replied to, I was expecting an email.
9/10/2013 6:16:22 PM By kevin@xbez Type:2
As long as you have 2 of that same model you will be able to crossfire through the motherboard, by having both in the system you should be able to just go to catalyst control center and enable crossfire.

Raghu: Thanks for the advice, more research is in order.
PGaster: Yup thats the one, if you go to feedback you will see my positive review of the card.
 
What do you guys think of this card?
http://www.newegg.com/Product/Product.aspx?Item=N82E16814121767

According to PassMark it outperforms the 7950, it of course has PhysX, and this specific one is 3gb.
My interest in PhysX is for UnrealEngine games such as Arkham Origins.

Any modern 7950 will crush the 660ti, when overclocked..Look for a model that is based on the 7970 PCB like the MSI Twin Fzr 3, the Gigabyte Windforce models, Sapphire Vaphire Boost X, and the HIS Turbo Ice X2 (something like that lol)..Any model that has twin 8+8 or 8+6 pin power connectors will have the 7970 PCB..This will give you better power delivery via beefier VRMs etc..

I am on water, so my example is different from an air cooled model, but my MSI TF3 (stock clock of 950mhz) is 100% stable @ 1.3Ghz..That puts me ahead of most 770s in games, for way less money! However even on air cooling with good case flow you should be able to easily hit 1.1-1.2Ghz with good temperatures..

If you really want the extra "fluff" of GPU PhysX, then grab a cheap $40 240GT, or 520GT..You can very easily run it alongside your main AMD GPU..just check out the PhysX subforum for the information..
 
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