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Old October 14, 2013, 07:47 AM
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Default REFERENCE 290X taken apart

Alright,

From various sources including TPU/OCN:


[TPU] Reference Radeon R9 290X Taken Apart

There is pics of the CAPS, so Trodas can chime-in!



Any comments on the PCB/components? How does it look?

My first issue...NO BACKPLATE!!!! I really loved my HD5870 REFERENCE for the sexy backplate, as other things...

As for the number of phases, it's seems timid? Not an expert....hopefully it's robust.
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Last edited by Delavan; October 14, 2013 at 07:56 AM.
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Old October 14, 2013, 12:19 PM
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My System Specs

Wink

trodas noticed!

Capacitors - Samxon URL polymers, excelent stuff. See my avatar or some of my recaps:
MSI 6340 recap
Gigabyte R9200 (GV-R9264DH) and Zalman VNF100 cooler
MSI PM8M3-V recap

I doubt that producers could come up with similar quality polymer caps, but we see. Definitively in the d10 dimensions, Samxon created back in 2008 even 470uF 16V caps, not need to downshoot to 330uF - the cap in my hands, 2008: http://trodas.wz.cz/kondiky/cap_images/1209896625.jpg

As far as 6 phases goes - if they can power a i7, then they can power an AMD R9 290X. It all depends on what quality the regulators are.
When the "phases wars" begin back in 2007, 2008 - we quickly discovered, that just to make "more phases", the companies used really shitty, outdated components (something like Creative using in X-Fi opamps from ~1970...) and just having a whole lot of them on the board does not mean anything.

As the output phase looks, 820uF 2.5V is the common size and capacity. There are existing ever 2700uF URL caps: http://trodas.wz.cz/kondiky/cap_images/1209896696.jpg
...but their ESR is higher, so they have lower maximum ripple current, and that is all it counts. I would employ there a Nichicon LE 820uF 2.5V cap with ripple 6600mA, currently used are 6100mA caps. Quite good, but the best Nichicons are capable od 6630mA - if the height 11.5mm is not a problem:
Nichicon R5 820uF d8x11.5

They did not skip on the ceramic caps single bit, witch is good. The two exmpty placer for big mosfets are interesting, never the less. Perhaps they should be powering something that is just not there? Dunno. Or maybe AMD is holding something back to add like a "XX" version? I have no idea. But clearly the design expected something to be there and it is just not

I like the board, tough it is not mine, lol
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Last edited by trodas; October 14, 2013 at 12:29 PM.
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Old October 15, 2013, 05:34 AM
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This looks like a reference 7970 board. I bet the water blocks still fit.
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Old October 15, 2013, 07:06 AM
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This is for sure a 290. The 7970 GPU chip looked like it was 45 degree turn inside of a square box. This GPU chip seems to be more of a rectangle. I doubt if it fit you would get good thermal connection.
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Old December 11, 2013, 03:23 PM
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pretty cool
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