M17x r2 + GTX 675m or 680m + SLi (Theory)

So it dawned on me today while I was chowing down on Thanksgiving leftovers.... They got 580m sli to work and all it took was HyperSli and a literally just a modded inf on 3 files. You could hunt down all the needed lines in the files convert them to say a newer driver, and bam! you have yourself a working setup for the gtx 675m's only because they are gtx 580m's rebranded, now the gtx 680m might be a bit trickier but i would assume its the same process just a few fudges in the files to get it to work and that would be able to work as well. but honest don't think we would ever be able to get the gtx 680mx to work when ever that comes out, not enough wattage to get those bad boys to work, 680's are possible because they are still 100w cards, the mx series is 122w. What do you guys think? Would it not be sick to get a set of 680m's running in the R2's? That would be literally by looking at the stats a 45% jump in performance with those cards alone. I might try this out after the first of the year to see if i can get it to work, worst thing that could happen is i would have to sell the cards

 

Possible? Absolutely! Over in techinferno, they were able to mod an m18x 330w PSU with the ID chip from an m17x PSU to get it to work. So power-wise, there is a solution. Getting the cards to SLI, as you described, much trickier. I wish you the best of luck (just be standing far back when you bench mark those 680ms at full speed :wub

 

so 2 680m on sli and a 920xm would run on a modded 330w psu on the r2?

 

Actually, maybe not. There are users who modded a 330W PSU and still had the it cut out. Apparently, even the 330W PSU doesn't provide enough power for 2 680Ms and a 920XM in the R2. Seems the only sure fire solution is to hardwire two 240W PSUs together to make a "virtual" 480W PSU. That seems to provide enough wattage to run the better GPUs and XM CPU at overclocked speeds.

 

so let me get this straight, with my current default psu (which is 240W I presume) my R2 is unable to provide enough power for a i7-920xm and dual gtx 680m Sli (2 cards) ? Man, just thinking about ordering the two cards...

 

That is correct.

 

how about a couple of ati 7970 and 920xm then?

 

the tdp for a 7970m and 680m is 100w. if u run 2 cards on sli or xfire, it would take 200w to run both under intensive load (playing a game). that would leave just 40w to power the cpu, hd, cdd, usb ports, led lights, monitor, speakers, and pretty much everything else that needs power to work.

 

That would be a no. 7970ms take are designed to be 100W each, just like the 680ms.

 

GTX 670mx should work they are 75 watt each

 

Theoretically, yes. But I don't think anyone's tried it with our R2s. Or at least no one who's said they've successfully done it.

 

Are there any write ups on the dual 240w adaptor?

 

Over in TechInferno: [M17x R2] - Dual PSU (2 x 240W)

StamatisX has done up a dual 240W PSU.

 

Awesome thanks, you seem to answer all my questions!

edit: Yeah, that's all a little to complicated. Unless they sold conversion kits or performed a mod service, I would probably just go with a single GPU set up. So the 6990s require the 330w mod, while the 7970s require the 2x 240. I would definitely not do the 2x 240 as it isn't practical. The 330w mod is alright though. The 7970 or 680m work with the 920xm perfectly fine with a 240w in single configuration, correct? So I would probably just go with a single card of those, sadly. Notebook check shows the 7970 and 680m outperform the CF 6990s. Now to see what the 700 series holds... A single high end 700 series card with no modifications to PSU and no CPU throttling would be very impressive (but unlikely).

 

But what if you use the i7 840QM, would you then be able to have two gtx 675m?

 

Has anyone tried out running the 680ms sli with a modded 2X 240w adapters or modded 330w adapter?

 

Flingin will clarify for you.

330W PSU can provide even 400W+ sustained

240W PSU can provide anything between 200-300W - mine 240W PSU would provide about 190W before it would cut off, so it is a matter of if you are lucky or not, and if PSU is old or new.

For SIngle 7970M + 920XM a 240W PSU is enough, but when you will overclock the card, you may experience shut downs IF your PSU is a bad batch or too old ( Like mine )

Power wise 680M = 7970M = 780M +/- 10Watts between the cards on stock

I have no problems even when i overclock Both CPU and GPUs in CF mode when using 330W PSU.

During normal overclocking my PSU would eat 275Watts on MAX load

Nobody have yet succeed on getting SLI 5xx.6xx,7xx working in R2 because MOBO has no SLI Certification.