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AMD Big Navi would see two product versions with different GDDR6 sizes (12- and 16 GB)
AMD will likely announce its high-end Navi product or products in a fast-approaching future, Q4 we think. On the Chinese Chiphell forum and on the Taiwanese PTT the rumour mill has been cranked up a notch. It seems there are two variants of the alleged Navi 21 GPU.
The news of two versions obviously would not be a surprise as historically AMD always has had a PRO and XT version of their cards. e.g. 5700 and 5700 XT. The chatter now, however, is that one product would get 16 GB GDDR6 memory (which is an awful lot, then again AMD wants to fight NVIDIA's Ampere), the second would have 12 GB of this memory. The news comes from a Chiphell user named 'wjm47196', who, according to Heise, was right with his information about the RX 5600 XT in the past as well.
Then user "AquariusZi" in the Taiwanese PTT forum confirms that AMD is pairing the Navi-21 GPU with GDDR6 and has it manufactured by TSMC in the N7+ process with extreme ultraviolet exposure. 16 GB could be implemented on a 256 or 512-bit wide memory interface. Samsung, among others, offers GDDR6 with 18 GBit/s (4500 MHz), which would come to 576 GByte/s on 256-bit wide memory bus or shockingly 1.15 TByte/s on a 512-bit wide bus. Make no mistake though as 512-bit interfaces are rare as that is a just a daft amount of trace wires in a PCB. For 12 GB, AMD would have to cut the controller to 192 or 384 bits. AMD's Lisa Su confirmed several times that "Big Navi" should appear this year.
AMD Big Navi Would Yield 40-50 percent more than the GeForce RTX 2080 Ti - 07/15/2020 01:14 PM
The news about big Navi seems to be endless, as well .. it surely is taking AMD long to release it. Chatter about the product series is getting louder, the dedicated graphics cards based on the “RDN...
AMD Big Navi Spotted? - Updated, the twitter photo is a confirmed fake - 02/25/2020 12:24 PM
The discussion as to what exactly to expect from AMD's upcoming flagship GPU series (Big Navi) has been ongoing. Personally I expect a GDDR6 based product, however, there might be an enthusiast and e...
Astyanax
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Posts: 9096
Joined: 2018-03-21
#5816245 Posted on: 08/08/2020 07:24 PM
Highly unlikely though,
cards haven't gone beyond 384bit in some time (except for HBM) because the complex routing requirements for 448 and 512bit cards is expensive and because more modules tends to be more expensive than higher density.
16gb 512bit Big Navi sounds so nice. It will be an interesting end of the year.
Highly unlikely though,
cards haven't gone beyond 384bit in some time (except for HBM) because the complex routing requirements for 448 and 512bit cards is expensive and because more modules tends to be more expensive than higher density.
JamesSneed
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Joined: 2017-02-14
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Posts: 1110
Joined: 2017-02-14
#5816252 Posted on: 08/08/2020 08:01 PM
Highly unlikely though,
cards haven't gone beyond 384bit in some time (except for HBM) because the complex routing requirements for 448 and 512bit cards is expensive and because more modules tends to be more expensive than higher density.
I'm skeptical as well. The only way I see something like this happening is a real halo Titan like card but we would also see Titan like prices. Guess we will know soon enough.
Highly unlikely though,
cards haven't gone beyond 384bit in some time (except for HBM) because the complex routing requirements for 448 and 512bit cards is expensive and because more modules tends to be more expensive than higher density.
I'm skeptical as well. The only way I see something like this happening is a real halo Titan like card but we would also see Titan like prices. Guess we will know soon enough.
Cidious
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Posts: 134
Joined: 2007-11-13
#5816260 Posted on: 08/08/2020 08:39 PM
Hmmm. This is getting interesting.
So we had some rumors of BIG Navi JUST being 15% faster than the 2080ti in AMDoptimised benchmarks.. Then there is a rumor now of it using less than 250Watts then there is the rumor of it not having 72 but 80 CUs... And there has also been a sample found with 56CU...
Here is what I think is going on.
56CU 7nm+ EUV 12GB 15% faster than 2080TI (mistaken for the top card)
72CU 7nm+ EUV 16GB 30-30% faster than 2080TI
80CU 7nm+ EUV 16GB 40% faster than 2080TI (HMB???? Beginning of next year when yields are up for full die usage????)
But I might be mistaken. Those 15% rumors sounded a lot like a 56CU die... and even though AMD has put through optimisations and 7nm+ EUV, I still think 250watts for the 80CU SKU is too low of an estimate.
But we will have to see. Might all be overhyped as usual...... But the simple math of doubling a 5700XT pans out... Navi2X... do the math yourself... Unless they have royally fucked up. (Again)
Hmmm. This is getting interesting.
So we had some rumors of BIG Navi JUST being 15% faster than the 2080ti in AMDoptimised benchmarks.. Then there is a rumor now of it using less than 250Watts then there is the rumor of it not having 72 but 80 CUs... And there has also been a sample found with 56CU...
Here is what I think is going on.
56CU 7nm+ EUV 12GB 15% faster than 2080TI (mistaken for the top card)
72CU 7nm+ EUV 16GB 30-30% faster than 2080TI
80CU 7nm+ EUV 16GB 40% faster than 2080TI (HMB???? Beginning of next year when yields are up for full die usage????)
But I might be mistaken. Those 15% rumors sounded a lot like a 56CU die... and even though AMD has put through optimisations and 7nm+ EUV, I still think 250watts for the 80CU SKU is too low of an estimate.
But we will have to see. Might all be overhyped as usual...... But the simple math of doubling a 5700XT pans out... Navi2X... do the math yourself... Unless they have royally fucked up. (Again)
tunejunky
Senior Member
Posts: 1187
Joined: 2017-08-18
Senior Member
Posts: 1187
Joined: 2017-08-18
#5816271 Posted on: 08/08/2020 09:33 PM
Hmmm. This is getting interesting.
So we had some rumors of BIG Navi JUST being 15% faster than the 2080ti in AMDoptimised benchmarks.. Then there is a rumor now of it using less than 250Watts then there is the rumor of it not having 72 but 80 CUs... And there has also been a sample found with 56CU...
Here is what I think is going on.
56CU 7nm+ EUV 12GB 15% faster than 2080TI (mistaken for the top card)
72CU 7nm+ EUV 16GB 30-30% faster than 2080TI
80CU 7nm+ EUV 16GB 40% faster than 2080TI (HMB???? Beginning of next year when yields are up for full die usage????)
But I might be mistaken. Those 15% rumors sounded a lot like a 56CU die... and even though AMD has put through optimisations and 7nm+ EUV, I still think 250watts for the 80CU SKU is too low of an estimate.
But we will have to see. Might all be overhyped as usual...... But the simple math of doubling a 5700XT pans out... Navi2X... do the math yourself... Unless they have royally ****** up. (Again)
your logic is fine if the assumptions based on the rumors are true.
Hmmm. This is getting interesting.
So we had some rumors of BIG Navi JUST being 15% faster than the 2080ti in AMDoptimised benchmarks.. Then there is a rumor now of it using less than 250Watts then there is the rumor of it not having 72 but 80 CUs... And there has also been a sample found with 56CU...
Here is what I think is going on.
56CU 7nm+ EUV 12GB 15% faster than 2080TI (mistaken for the top card)
72CU 7nm+ EUV 16GB 30-30% faster than 2080TI
80CU 7nm+ EUV 16GB 40% faster than 2080TI (HMB???? Beginning of next year when yields are up for full die usage????)
But I might be mistaken. Those 15% rumors sounded a lot like a 56CU die... and even though AMD has put through optimisations and 7nm+ EUV, I still think 250watts for the 80CU SKU is too low of an estimate.
But we will have to see. Might all be overhyped as usual...... But the simple math of doubling a 5700XT pans out... Navi2X... do the math yourself... Unless they have royally ****** up. (Again)
your logic is fine if the assumptions based on the rumors are true.
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Joined: 2008-08-28
16gb 512bit Big Navi sounds so nice. It will be an interesting end of the year.