xfire 7970m on m17xr2

Ok, i will most likely not go this route, but for the purpose of understanding better.

Does xfire 7970m's on an r2 require a PSU mod, or does my standard psu work (my original psu as the larger one, since I had the original config with sli cards). If so, is there anyone that either sells, or makes the psu mods if materials are provided?

Thanks in advance

 

I think you need the 330W mod if you have the 920XM/940XM and you overclock them.

 

Just use basic math. AMD cores will draw 100 W per card and the CPU will draw 45 W at full operational loads at baseline clocks. Add in 50W extra for the motherboard just to be safe and you will get your answer.

*Request thread close please*

 

CPU is at least 45. and if you want full use of the X-fire, we are at above 80W.
We are peeps that have used the 240W, but you have to undervolt the GPU's and will still be boarderline, and only since some PSU's can give as high as apx 280W.

If you instead of using threads for this search with exact same sentence you will find sangemarus description for X-fire upgrade making your R-2 very nice.

 

thanks for the info. I went ahead and bought in ebay a modified psu... paid through the nose i think, but at least it will either help me with my shutdowns on my single 7970m config... or else allow me to use xfire 7970m.
I might buy a second 7970m if i find a decent one on amazon at a good price (since i got some gcards i can burn)... I just need to determine if the performance increase is worth it. if its close to a single 880m config.. i might just bite that bullet

 

Let us know how it goes once you get it.

 

will do Mr. Porras.

While I am at it, anyone knows how does an xfire 7970m set up compare to single 880m (I know 17xr2 does not support 880m, its just to compare gaming performance).

Finally, what is this mantle thing that everyone keeps talking about? does the 7970m support mantle?

 

The 7970m's do support Mantle and the Mantle API is created to overcome CPU bottlenecks by providing more computational tasks to be done on the powerful GPUs instead of the CPU. Previously we had to upgrade out processors to make sure we are not bottlenecking our GPUs but the mantle API hopes to combat that by lessening the need for a powerful CPU. That being said though, performance gains will only be noticed on CPU intensive games only such as RTS-es and racing sims rather than FPS-es