Somnambulator
Gawd
- Joined
- Apr 13, 2008
- Messages
- 856
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?
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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 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?
Thanks for the great explanation. 352-bit seemed completely random. Why didn't they go for 384?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
Because each memory controller is 32 bits wide, and it's optimal for it to be a power of 2. 32 * 11 = 352.Thanks for the great explanation. 352-bit seemed completely random. Why didn't they go for 384?
And perhaps it's to create market segmentation for a yet to be disclosed part that will have 12GB of memory.
Yep, exactly my thinking. Just didn't spell it out as nicelyRight, 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.
And the 1070 is a cut down 1080.I understand now... I thought the Ti cards were OC'ed x80's, not cut down Titans. This makes so much more sense.
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.
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 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.