First Vega performance figures leaked

Apparently there was a PC running one of the consumer Vega cards at the event marking the launch of the new AMD deep learning cards:

http://www.pcgameshardware.de/AMD-Ra...-1080-1215734/
http://videocardz.com/64706/amd-vega...possible-specs

Performance seems around the same as a GTX1080 in Doom. Also the card apparently uses a narrower 2048 bit memory bus instead of the 4096 bit memory bus in the Fiji based cards.

Pricing will be key, I guess.

Coming out a year later with the same performance as a 1080 but at the cost of 1070 would put them in good stead.

Edit: Or even somewhere in between. I didn't realise there was such a gulf between 1070/80 pricing.

Make it £400, for 1080 performance and I might actually bite.

Quote:

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Originally Posted by CAT-THE-FIFTH

... Also the card apparently uses a narrower 2048 bit memory bus instead of the 4096 bit memory bus in the Fiji based cards.

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That's consistent with the earlier rumours (i.e. 512GB/s which would match up with a 2-stack HBM2 implementation). HBM2 has double the data rate so you get the same bandwidth from half the bus width (and each stack can be up to 8GB, although I think we'll see 4-Hi 4GB stacks initially for an 8GB card).

Quote:

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Originally Posted by scaryjim

That's consistent with the earlier rumours (i.e. 512GB/s which would match up with a 2-stack HBM2 implementation). HBM2 has double the data rate so you get the same bandwidth from half the bus width (and each stack can be up to 8GB, although I think we'll see 4-Hi 4GB stacks initially for an 8GB card).

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Interestingly enough the pcgameshardware article says a tweaked Fiji driver is being used,so it confirms the leaks the smaller Vega is using a 4096 shader GPU.

Quote:

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Originally Posted by CAT-THE-FIFTH

Interestingly enough the pcgameshardware article says a tweaked Fiji driver is being used,so it confirms the leaks the smaller Vega is using a 4096 shader GPU.

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My back-of-envelope calculations for a Fiji clocked at around 1250MHz pushed it up to somewhere between the 1070 and 1080 in performance, without any consideration of potential improvements from the architecture tweaks. All the current rumours point to Vega 10 being a refined Fiji. Be interesting to see what the process shrink + higher clock speeds do to the TDP - I'd hope for a reduction from the 275W the Fury X came with but given the MI25 card is listed as < 300W that's probably wishful thinking. Wonder if we'll get a Nano-style card targetting ~ 180W TDP @ 85% of the performance: that'd be quite tasty... :)