A Look At HBM Used In Fiji

[Opcode]

Source

 

 

We had a chance to see the Hynix HMB memory of the future, and even see a next generation HBM2 wafer with many of these next-generation dies.

 

High Bandwidth Memory (HBM) is what will be used in the GPUs of the future, and at this point the concept hardly needs an introduction. The first generation of HBM will be used in AMD Fiji, a GPU that is expected to come in the next few months.

 

 

 

Quite impressive fitting 8GB into a chip smaller than a tablet of Aspirin.

[nicehat]

Source

 

Quite impressive fitting 8GB into a chip smaller than a tablet of Aspirin.

 

To be fair, tablets of aspirin can get prety big

 

 

good to finally see some pics for context tho!

[Zah]

Love to see the industry move forward like this.

[Ren]

Are they using way less silicon with HBM?

Maybe graphics cards will get a lot cheaper soon..

[Norman_the_Owl]

Least we're not totally in the dark about 390x development...AMD really need to kick it into gear...

[azurezeed]

so will the 390x have HBM gen 1 or 2?

[Opcode]

so will the 390x have HBM gen 1 or 2?

HBM1

[azurezeed]

HBM1

what about the 8GB 390x version of the rumors?, how will they fit all the HBM if they use gen 1?

[Derranged]

HBM1

 

Which would make the recent leak about it using 8GB's fake? or are they still able to push past the supposed 4GB limitation with HBM1? Unless it's the WCE version of the card that uses HBM2 with 8GB's to be released later as a special edition.

[Maslofski]

what about the 8GB 390x version of the rumors?, how will they fit all the HBM if they use gen 1?

 

they can just hold the 8GB version till HMB2 is here, or somehow make it work with HMB1

[carolkarine]

they can just hold the 8GB version till HMB2 is here, or somehow make it work with HMB1

 

 

Which would make the recent leak about it using 8GB's fake? or are they still able to push past the supposed 4GB limitation with HBM1? Unless it's the WCE version of the card that uses HBM2 with 8GB's to be released later as a special edition.

 

 

what about the 8GB 390x version of the rumors?, how will they fit all the HBM if they use gen 1?

 

There has been recent info regarding the 4gb limit saying it's not actually a limit and that someone misconstrued the 390x's limitations.

[Maslofski]

There has been recent info regarding the 4gb limit saying it's not actually a limit and that someone misconstrued the 390x's limitations.

 

oh, so its a stack limit then? just have 2x 4GB modules?

[azurezeed]

There has been recent info regarding the 4gb limit saying it's not actually a limit and that someone misconstrued the 390x's limitations.

so, they can just put more modules eh? or something like that

[Opcode]

what about the 8GB 390x version of the rumors?, how will they fit all the HBM if they use gen 1?

Which would make the recent leak about it using 8GB's fake? or are they still able to push past the supposed 4GB limitation with HBM1? Unless it's the WCE version of the card that uses HBM2 with 8GB's to be released later as a special edition.

AMD's leaked slides suggest dual-linked modules (2x1GB) x 4 = 8GB.

[Mefoga]

I also heard somewhere that 4GB of the WCE's 8 is HBM, and the other 4GB is GDDR5. Keep that in mind as well.

[Notional]

I also heard somewhere that 4GB of the WCE's 8 is HBM, and the other 4GB is GDDR5. Keep that in mind as well.

 

That was just the speculation of a LTT forum member, nothing else. Don't put too much into it.

[Opcode]

I also heard somewhere that 4GB of the WCE's 8 is HBM, and the other 4GB is GDDR5. Keep that in mind as well.

A bad rumor started by one of our own community members. It would make no point for AMD to pipe GDDR5 from the PCB when they could just run stacks of dual linked HBM.

 

[patrickjp93]

A bad rumor started by one of our own community members. It would make no point for AMD to pipe GDDR5 from the PCB when they could just run stacks of dual linked HBM.

That's if they can. HBM was not designed with inter-communication between the chips in mind like HMC was.

[TechFan@ic]

There was never a 4GB limitation on the R9 390X. It was just a (badly) made up story by Fudzilla. Who claimed that the interposer can't fit more than 4GB an utterly false and uneducated claim.

HBM1 CAN in fact be used in 8GB configurations, however the only difference between an 8GB HBM1 and HBM2 configuration is the total bandwidth. As HBM2 runs at twice the frequency you're looking at double the bandwidth.

So with the R9 390X running 8GB of HBM1 at 1.25Ghz we're looking at 640GB/S of bandwidth, nearly three times as much as a GTX 980 (224GB/S). Once AMD moves over to HBM2 (which they mention in the slide above) the bandwidth will double to 1.28 Terabytes/s , just from the frequency increase alone.

[Sakkura]

That's if they can. HBM was not designed with inter-communication between the chips in mind like HMC was.

 

According to that slide they can - "New HBM dual-link interposing enables larger capacities"

[Victorious Secret]

I also heard somewhere that 4GB of the WCE's 8 is HBM, and the other 4GB is GDDR5. Keep that in mind as well.

 

That was terrible speculation and it didn't make any sense.