According to TechPowerUP Polaris GPUs may feature less Compute Units than previous thought.
Don’t forget to read our comment later in this post
Polaris 10 with 32 CUs?
Although it remains unclear if number of Stream Processors per Compute Units has changed, new information suggests that total number of unified units could be lower than we anticipated.
While Sisoft database clearly states that Polaris 10 has at least 36 CUs (2304 Stream Processors), new rumor suggest that P10 could feature around 2048 unified units.
Polaris 10 also known as Ellesmere is said to offer 5.5 TFLOPs of single precision computing performance. TPU editor notices that this is still more than Hawaii chip which has 2816 Stream Processors. So it means that Polaris 10 is clocked at around 1350 MHz.
Additionally we are told that Polaris 10 SKUs will be equipped with 8GB GDDR5 memory, possibly even GDDR5X. The interface is supposedly 256-bit wide. TDP of the new Polaris 10 silicon is estimated at 150W.
This would actually put P10 cards on pair with GeForce GTX 1070, which is believed to offer almost identical specifications.
Polaris 11 with 14 CUs?
Polaris 11 aka Baffin is said to feature just 14 CUs, which translates into 896 Stream Processors. This GPU would offer 2.5 TFLOPs performance, which again means clock speed at around 1395 MHz.
Baffin-based cards will feature up to 4GB GDDR5 memory across 128-bit interface. According to AMD this GPU will be widely used in mobile market.
|AMD Polaris Radeon 400/Radeon M400 Series|
|GPU||Polaris 10||Polaris 11|
|Stream Processor (CU * 64)||2048||896|
|FP32 Computing Performance||5.5 TFLOPs||2.5 TFLOPs|
|Base Clock||~1350 MHz||~1395 MHz|
|Memory Clock||~1750 MHz||~1500 MHz|
|Memory||up to 8GB GDDR5(X)||up to 4GB GDDR5|
Our comment: We received the exact same specifications just few days ago. Although it was noted that those are specifications for mobile GPUs, so you may want to take this into consideration.