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Why not have interchangeable RAM on Video Cards?

1012 Views 13 Replies 10 Participants Last post by  gian84
Just out of curiosity...

Why not have RAM slots similar to those on your motherboard on video cards?

It'd allow for greater impulse buying (better for companies!) since it'd be easier to upgrade to a gig or two or GDDR(x) than a whole new video card, and would open up further overclocking options on the RAM. (Could charge more for higher rated memory, etc)

Just curious as to why this hasn't been done yet. Is it JUST to make people want to upgrade from 512 models to 1GB, or is it a technological nightmare to implement?
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that would be awesome if i could throw ram onto my vid card
or even be able to put something like a pci card with dedicated ram for the video card
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Maybe its more exspensive to inplement? or just they make more money and would lose money.
My thought was more along the lines of the GPU itself. Would make replacing a toasted chip easier, just pop it out the ZIF socket and throw in a new one. Might even allow you to put, say, a 4870 core onto a 4550 PCB and have a 4870 in a low profile setup!

The interchangeable ram would go along with this...I think the 4550 runs GDDR2, which fails total ass.
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Originally Posted by TestECull
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My thought was more along the lines of the GPU itself. Would make replacing a toasted chip easier, just pop it out the ZIF socket and throw in a new one. Might even allow you to put, say, a 4870 core onto a 4550 PCB and have a 4870 in a low profile setup!

The interchangeable ram would go along with this...I think the 4550 runs GDDR2, which fails total ass.

That would *rock* if they made video cards modular like a motherboard.

4800 series graphics board - can put any GPU in there (at a price, of course) from 4830 to 4890. Then you could choose the RAM you wanted - although I'm not sure about slot compatibility between GDDR2 through GDDR5. But that could be an option of the board, ofc - a cheap board would be GDDR2 with two slots.
The expensive boards could run GDDR5 with 5 or 10 slots!


Haha. Would be cool, but won't happen. =/
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Originally Posted by Sacre
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That would *rock* if they made video cards modular like a motherboard.

4800 series graphics board - can put any GPU in there (at a price, of course) from 4830 to 4890. Then you could choose the RAM you wanted - although I'm not sure about slot compatibility between GDDR2 through GDDR5. But that could be an option of the board, ofc - a cheap board would be GDDR2 with two slots.
The expensive boards could run GDDR5 with 5 or 10 slots!


Haha. Would be cool, but won't happen. =/

Correct me if I'm wrong, but I'm pretty sure all of the 4800 series use the same gpu...
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Originally Posted by slothfish
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Correct me if I'm wrong, but I'm pretty sure all of the 4800 series use the same gpu...

So why can't I get a 4830 and turn it into a 4890? =/
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ITs been done actully, go back in time to the S3 Virge lines ect, or older. My old Verge shipped with 2mb EDO and could take another 2mb of EDO if I wanted to buy it.

This isnt done today for a very simple reason, voltage ect.

DDR1, DDR2, GDDR2, GDDR3, GDDR4, and GDDR5 all run at diffrent voltages.

Also GDDR5 has twice the pins that the rest do.

Now add to that, depending on the card your looking at you could be dealing with 32bit or 64bit ram chips though 64bit is the norm today thats also there.

Another technical nightmare is timings, as these are hardcoded into the VGA bios, now you could say do what motherboards do, thats fine and dandy, but it still causes issues very fast when you start mixing video ram. Overall its a big hassle and way to much work and big chance of you instead fying your card.

IF you really wanna upgrade the ram though, feel free to.

Heat up the BGA ram till the sodder melts on the underside, and pull it off, or just scrape it off. Now clean the video card, get new BGA ram that meets the same timings, voltage ect and put it on there, you can do 256mb to 2gb if you want, just get the right stuff, and soder it on, and hope you sodered it on right.
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Originally Posted by Sacre
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So why can't I get a 4830 and turn it into a 4890? =/

Because ATI added more stream processors to different cards and clocked them differently. They all still use the same exact rv770 chip though.
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Originally Posted by TheSandman
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IF you really wanna upgrade the ram though, feel free to.

Heat up the BGA ram till the sodder melts on the underside, and pull it off, or just scrape it off. Now clean the video card, get new BGA ram that meets the same timings, voltage ect and put it on there, you can do 256mb to 2gb if you want, just get the right stuff, and soder it on, and hope you sodered it on right.

Damn, that sounds like a cool project.

Would it require flashing a custom bios or anything? How much does this RAM cost?


4850x2 4GB (2GB per card)... hmmmm.
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Nothing really uses more than 512mb and 256mb is dated so all youd really upgrade to is 1024mb, so they just sell a card with 512 and one with 1024 saves money.
I don't know but to me it looks like there cards will have slots for DRAM.

http://www.caustic.com/
That'll be cool if we can just add more ram in our existing gpus, or just upgrade the core. So it'll be like having two mobos lol. A mobo in a mobo.
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