Radeon VII FP64 performance

[linedot]

Hi,

In the Radeon VII video Linus mentioned that the FP64 performance of the Radeon VII will be crippled. Is this based on anything/was any info on this revealed or just a "reasonable" assumption?

[Electronics Wizardy]

It looks like the die has 1/2 fp64 of fp32 performance, so if there is bad fp64, they just disabled it.

 

But seeing how amd has crippled fp64 on all radeon cards for a while now, Id be very suprised if there if they left high performanc fp64.

 

But there doesn't seem to be any exact fp64 numbers from amd now, wait for reviews.

[Maye]

AMD left FP64 fully intact. So the card has 6.9 TF of FP64. That's on par with the Titan V which is a $3000 card. I'm picking up two :P.

 

https://twitter.com/RyanSmithAT/status/1083959608371175424?s=20

[BlockedTheShot]

8 hours ago, Maye said:

AMD left FP64 fully intact. So the card has 6.9 TF of FP64. That's on par with the Titan V which is a $3000 card. I'm picking up two :P.

 

https://twitter.com/RyanSmithAT/status/1083959608371175424?s=20

if that's equivelant to a titan v, that's quite a bargin from AMD

[Maye]

The Titan V is usually pegged between 6.9 -7.5 TF of FP64. The Instinct MI50 is listed as having 6.9 TF of FP64. So yes it's on par. Will have to wait for benchmarks for exact numbers though.

 

Copying from my reddit posts where I talked about this in more detail.

 

While the Quadro and the WX series come with certified drivers that are quite important to certain use cases. Not all use cases that need FP64 need these certified drivers.Now the Titan V doesn't have these certified drivers. Neither does the Radeon VII. What these two cards offer is Gaming Performance, Scientific/AI compute in FP64, high amounts of ram in the form of HBM. The Radeon VII is an example of the rarest of rare cards. It is an all in one gpu. These are the ONLY two recent cards which offer all three of these things in one single package.

 

Thus the only real competitor for Radeon VII when you consider all aspects is the Titan V.

 

Comparing the two cards

     -Gaming performance is win for Titan V. Titan V is superior as it is roughly equal to a 2080ti w/o the RT. Nonetheless the Radeon VII isn't too far behind as it roughly matches the rtx 2080.

     -Memory amount and sheer bandwidth is a solid win for the Radeon VII. It has 4gb more, which is huge cause these tasks are often memory limited, and bandwidth is very important for many compute tasks.

     -Price is a HUGE win for Radeon VII. It is priced at $699 MSRP while the Titan V costs $2999 MSRP.

     -FP64 compute throughput is a tie. Both cards output ~6.9TF of FP64.

 

Thus the Titan wins in 1 of the four comparison categories, the Radeon VII wins in 2 of them, while they tie in the last. Arguably, I'd put price as the most important category, and even in the one category it loses it is not by too much.

 

Finally, it is arguable that you can simply buy two Radeon VII for LESS than the price of a single Titan V and get superior gaming performance in 70+% of games while also doubling your compute capabilities.