m18x R1 upgrade to 780m or 880m?

Hi,
I would like to change my old 560m 1.5 sli to 780m or 880m. I have read that the 880m could give more problems than the 780m. Is that so? What is the difference in performance between the two vga? is so much?
I've already seen, opening the laptop, that the first vga has an heatsink of 100 watt. is the same for the new vga? not so, right?
and What about x bracket?

last thing: there is still someone buying my old vga?

Thanks for support and sorry for my English

 

No one?

 

880m's have known throttling/power management issues-a quick search will find several threads detailing this. Personally, I'd go the 780m route.

 

As an 880M owner, I agree. The 880M is a finicky beast.

 

Thanks for the replies. more memory does not affect so much, right?

I've already seen, opening the laptop, that the first vga has an heatsink of 100 watt. is the same for the new vga?
and What about x bracket?

 

X-bracket is the same for all nvidia cards, you can reuse the heatsink too as long as it is 100W. Get 780M, 880M is bad.

 

Thanks for the support.

So, it's the same heatsink because it is 100 watt. should I change the thermal pads?

Now I have to just figure out where to take the 770 at a fair price.
Only vga, approximately what price might have for a fair price?

Thanks

 

No need to change thermal pads unless they are ripped or damaged. Good luck finding GTX 770M, it is not a common card. I expect in the 300$ range

 

Yep, just make sure the heatsink(s) are 100 watt parts (they may not be as 560m has 75 watt tdp). After you've sorted that out you're good to go. Have fun!

 

One of them is 100watt. Other is 75. Strange case or normal?
So, all vga have same layout?

Sorry! I mean 780m. Wrong write.

@ALL
Thanks! I have more clear idea!

Inviato dal mio SM-G925F utilizzando Tapatalk

 

Yes, fairly common. The tech must have mistakenly used the 100w part or didn't have another 75w on hand.

Essentially the same, just have to examine the heatsink contacts respective to ram chip placement on the card(s). If they don't match up, reapply thermal pads accordingly. Personally I would get all new thermal pads & CLU, taking the time to do your install optimally and never have to worry about it later.

 

Clear. Versions do not exist in 3 or 2 pipe for the 100 watt? I have heard this. The thermal pads are common or are specific? What are the CLU? Sorry for the ignorance. Thanks again. I almost concluded to disturb you

edit on the fly: i see two pcb models: green and blue. There are any difference?

Inviato dal mio SM-G925F utilizzando Tapatalk

 

The 100W part is a 3-pipe design.

Some ebay listings of the Left:

http://www.ebay.com/itm/NEW-Origina...078461?hash=item2ca386c0fd:g:NQUAAOSwjVVVsJ6H

And Right heatsink:

http://www.ebay.com/itm/Dell-Laptop...153500?hash=item567e6b5f9c:g:9ioAAOSwEgVWShXN

You can also check the NBR Marketplace, they are a fairly common find there.

Thermal pads come pre-installed on new parts and **sometimes** used as well. However, one or two (or all) pads may be missing on used parts. Thermal pad material is generic, you can find it on part outlet sites/ebay and the like. Any decent thermal pad material will do; you can even cut it to the size(s) you need.

An example of what I mean: http://www.ebay.com/itm/Blue-100mmx...154470?hash=item2350e6bda6:g:2AkAAOSwofxUa4KO

CLU is Coollaboratory Liquid Ultra-basically a liquid-based thermal compound which provides more efficient heat dispersion (i.e. lower temps) than your standard paste. Highly recommended. Be sure to read up on the install, and maybe watch a few tutorial vids to learn proper application procedure as it IS conductive - therefore it can damage the circuitry of your parts if handled incorrectly.

Regarding the PCB colors; to my knowledge there is no significant difference/advantage between the two. I've read threads where people argued that the blue pcb parts have higher-quality ram/vrm's and can therefore overclock higher, but I have no first-hand experience with this. Unless you're planning to really push the clocks on the card(s), I'd just hunt down the best price from the most reputable seller.

*edit* the nvidia 100w heatsink comes in **only** a 3-pipe design. the 2-pipe is a 75w part. my mistake.

 

Crystal Clear!! Really thanks!

 

I do not recommend using CLU, at least for beginners. It's known to do some damage to the surface over long time. Gelid GC extreme is 100% safe and nearly as good as CLU.

@alexkidd85 I have upgraded M18xR1 to dual 880M Plug'n'play.