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Tech preview: Radeon RX 5700 and 5700 XT
Posted by: on: 06/11/2019 01:19 AM [
196 comment(s) ]
AMD just has announced its Radeon 5700 series graphics cards. The NAVI based product are fabbed at 7nm, get GDDR6 memory and for the bigger part is based on a new architecture called rDNA. In this early preview article, we’ll share details and about the technology and specifications. This by no means is a review, the launch you may expect in early July.
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cowie
Senior Member
Posts: 13273
Senior Member
Posts: 13273
Posted on: 06/21/2019 04:03 AM
soon? launched in June 2008
was over a decade ago
amd happened to be better for "3dbenching" then intel was at that time too.
its all just price placement now price it on how fast it is compared to the other guy,both seem to care about the bottom line of coarse so higher the better
yep^ funny how soon we forget....
soon? launched in June 2008
was over a decade ago
amd happened to be better for "3dbenching" then intel was at that time too.
its all just price placement now price it on how fast it is compared to the other guy,both seem to care about the bottom line of coarse so higher the better
J Guy
Junior Member
Posts: 1
Junior Member
Posts: 1
Posted on: 07/06/2019 07:04 AM
People didn't talked too much about what could scalability be ... Could Amd copy the Zen chiplet architecture to Navi ??? If you look at the second picture in "Tech preview: Radeon RX 5700 and 5700 XT, https://www.guru3d.com/articles-pages/tech-preview-radeon-rx-5700-and-5700-xt-(navi),1.html we can see 20 similar patterns all around the center. 20 * 128 = 2560 shaders ; 18 *128 = 2304 shaders. Numbers match. This could be the first iteration and second should be 128 shaders becoming a chiplet and then AMD could repeat the Zen success, in lowering cost and maximizing the number of shaders as they did with CPU Cores.
That's my 2 cents !
People didn't talked too much about what could scalability be ... Could Amd copy the Zen chiplet architecture to Navi ??? If you look at the second picture in "Tech preview: Radeon RX 5700 and 5700 XT, https://www.guru3d.com/articles-pages/tech-preview-radeon-rx-5700-and-5700-xt-(navi),1.html we can see 20 similar patterns all around the center. 20 * 128 = 2560 shaders ; 18 *128 = 2304 shaders. Numbers match. This could be the first iteration and second should be 128 shaders becoming a chiplet and then AMD could repeat the Zen success, in lowering cost and maximizing the number of shaders as they did with CPU Cores.
That's my 2 cents !
Fox2232
Senior Member
Posts: 11809
Senior Member
Posts: 11809
Posted on: 07/06/2019 06:46 PM
People didn't talked too much about what could scalability be ... Could Amd copy the Zen chiplet architecture to Navi ??? If you look at the second picture in "Tech preview: Radeon RX 5700 and 5700 XT, https://www.guru3d.com/articles-pages/tech-preview-radeon-rx-5700-and-5700-xt-(navi),1.html we can see 20 similar patterns all around the center. 20 * 128 = 2560 shaders ; 18 *128 = 2304 shaders. Numbers match. This could be the first iteration and second should be 128 shaders becoming a chiplet and then AMD could repeat the Zen success, in lowering cost and maximizing the number of shaders as they did with CPU Cores.
That's my 2 cents !
GPU chiplets are in pipeline. GPU itself is embedded in infinity fabric already since Vega. For certain tasks Chiplets are no problem. For other tasks, access speed to memory attached to other GPU chiplet(s) may prove to be an issue.
Using I/O hub as with Zen2 may prove to be problematic as GPUs use magnitude higher bandwidth than CPUs. Complexity may prove to be too much.
We'll see with 8-channel 8chiplet Zen2. But that uses rather big I/O die and that has to be paid too.
It may start to be useful in case AMD goes for 5 times 10 Dual-CU (20 CUs per chiplet = 1280SP in 1st Navi configuration) => 6400SP.
But monolithic GPU with 5120SP may still have reasonable size (price) on 7nm to offset cost of interposer for chiplets and huge I/O die.
People didn't talked too much about what could scalability be ... Could Amd copy the Zen chiplet architecture to Navi ??? If you look at the second picture in "Tech preview: Radeon RX 5700 and 5700 XT, https://www.guru3d.com/articles-pages/tech-preview-radeon-rx-5700-and-5700-xt-(navi),1.html we can see 20 similar patterns all around the center. 20 * 128 = 2560 shaders ; 18 *128 = 2304 shaders. Numbers match. This could be the first iteration and second should be 128 shaders becoming a chiplet and then AMD could repeat the Zen success, in lowering cost and maximizing the number of shaders as they did with CPU Cores.
That's my 2 cents !
GPU chiplets are in pipeline. GPU itself is embedded in infinity fabric already since Vega. For certain tasks Chiplets are no problem. For other tasks, access speed to memory attached to other GPU chiplet(s) may prove to be an issue.
Using I/O hub as with Zen2 may prove to be problematic as GPUs use magnitude higher bandwidth than CPUs. Complexity may prove to be too much.
We'll see with 8-channel 8chiplet Zen2. But that uses rather big I/O die and that has to be paid too.
It may start to be useful in case AMD goes for 5 times 10 Dual-CU (20 CUs per chiplet = 1280SP in 1st Navi configuration) => 6400SP.
But monolithic GPU with 5120SP may still have reasonable size (price) on 7nm to offset cost of interposer for chiplets and huge I/O die.
Loophole35
Senior Member
Posts: 9793
Senior Member
Posts: 9793
Posted on: 07/06/2019 06:49 PM
@Fox2232 do you know if RDNA has a CU limit like GCN did?
@Fox2232 do you know if RDNA has a CU limit like GCN did?
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Senior Member
Posts: 7835
yep^ funny how soon we forget....