2080 ti 11GB vram?

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Apr 13, 2008
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How does it have 11GB VRAM? That number doesn't make any sense at all to me. Is it 12GB but with 1GB not traditionally addressable a la GTX970 's .5 GB?
 
It uses a 352-bit bus (32 * 11). It only physically has 11 GB spread out across 11 x 8Gb memory memory chips. The 1080 Ti uses the same configuration.

Here is the PCB of the 1080 Ti. I circled the bare pins where a memory chip would normally go. It uses the same PCB as the 12GB 384-bit Titan X, so that's why the pins are still there.

upload_2018-9-4_15-4-48.png
 
It uses a 352-bit bus (32 * 11). It only physically has 11 GB spread out across 11 x 8Gb memory memory chips. The 1080 Ti uses the same configuration.

Here is the PCB of the 1080 Ti. I circled the bare pins where a memory chip would normally go. It uses the same PCB as the 12GB 384-bit Titan X, so that's why the pins are still there.

View attachment 101399
is a single DDR6 chip that expensive to be removed off the board from a 1200usd video card? would just a 32 bit controller make the GPU die bigger? Titan X wasnt just 1200usd with GDDR5X?
 
is a single DDR6 chip that expensive to be removed off the board from a 1200usd video card? would just a 32 bit controller make the GPU die bigger? Titan X wasnt just 1200usd with GDDR5X?

It's not about the memory chip cost. The GPU core has that chip's controller disabled. Even if the board had a chip it couldn't be used
 
It uses a 352-bit bus (32 * 11). It only physically has 11 GB spread out across 11 x 8Gb memory memory chips. The 1080 Ti uses the same configuration.

Here is the PCB of the 1080 Ti. I circled the bare pins where a memory chip would normally go. It uses the same PCB as the 12GB 384-bit Titan X, so that's why the pins are still there.

View attachment 101399
Thanks for the great explanation. 352-bit seemed completely random. Why didn't they go for 384?
 
Thanks for the great explanation. 352-bit seemed completely random. Why didn't they go for 384?
Because each memory controller is 32 bits wide, and it's optimal for it to be a power of 2. 32 * 11 = 352.
 
And perhaps it's to create market segmentation for a yet to be disclosed part that will have 12GB of memory.

Right, every Titan from 2015+ has had 12GB or more of VRAM. The 2080 Ti is no Titan, despite the price point. It's possible we'll get a 4608:96:384-bit 12GB TU102 card as a Titan RTX, or any other name, but for more money.
 
Right, every Titan from 2015+ has had 12GB or more of VRAM. The 2080 Ti is no Titan, despite the price point. It's possible we'll get a 4608:96:384-bit 12GB TU102 card as a Titan RTX, or any other name, but for more money.
Yep, exactly my thinking. Just didn't spell it out as nicely :)
 
I understand now... I thought the Ti cards were OC'ed x80's, not cut down Titans. This makes so much more sense.
 
I understand now... I thought the Ti cards were OC'ed x80's, not cut down Titans. This makes so much more sense.
And the 1070 is a cut down 1080.

Titan Xp = GP102-450
Titan X = GP102-400
1080 Ti = GP102-350

1080 = GP104-400
1070 Ti = GP104-300
1070 = GP104-200
 
I haven't seen enough PCB shots but is it always the same memory chip that is disabled? You'd think that part of the reason why it was disabled was due to manufacturing defects and not purely cost/product segmentation.
 
Right, every Titan from 2015+ has had 12GB or more of VRAM. The 2080 Ti is no Titan, despite the price point. It's possible we'll get a 4608:96:384-bit 12GB TU102 card as a Titan RTX, or any other name, but for more money.

Yeah but the speed difference will be negligible. The original Titan Xp CUDA cores were cut down just as much as this. From a performance perspective I consider it a Titan. Within 7% from max die, ect.

I have this feeling the next Titan will be 7nm. At least that’s what I would do. Not out of the realm of possibility we get a Titan like you said I just don’t know who would buy it unless it had prosumer drivers.
 
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I haven't seen enough PCB shots but is it always the same memory chip that is disabled? You'd think that part of the reason why it was disabled was due to manufacturing defects and not purely cost/product segmentation.
Every PCB shot I've seen has the same one missing, right up to the mother of all 1080 Ti the K|NGP|N.

I'm sure some volume of them were Titan rejects, as they're not just going to throw them away, but I don't think they would get enough volume solely by using the rejects. There probably needs to be some segmentation happening in order to reach their SKU targets.
 
Every PCB shot I've seen has the same one missing, right up to the mother of all 1080 Ti the K|NGP|N.

I'm sure some volume of them were Titan rejects, as they're not just going to throw them away, but I don't think they would get enough volume solely by using the rejects. There probably needs to be some segmentation happening in order to reach their SKU targets.

This is my thinking as well. Based on the past demand it was likely a greater portion of disabling the same (functional) ROPs and memory controller on each chip.
 
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