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look at hbm2 as the GPU memory

hoppingbunny123hoppingbunny123 Posts: 713
its as fast as GDDR 5, and probably GDDR 6, but the difference is the amount of power required to run hbm2 vs GDDR 5. hmb2 is a low power memory.

for all in one vr headsets like the quest from oculus, a low power gpu memory means more battery life and better gpu's used.

whats keeping hbm2 from being used is the market from nvidia and amd isnt using hbm2 because the startup cost to mass market the new memory is expensive, but once hbm2 is being mass marketed and replaces gddr 5, and gddr 6 the cost of hbm2 will go down to gddr 5 and gddr 6 price levels.

so since nvidia is pushing for driving and ai and oculus quest as is amd, its in their best interest to switch over to hbm 2 memory for the reasons i listed. think of it as a shift similar to ssd using nvme over m.2 instead of sata.


  • kojackkojack Posts: 5,926 Volunteer Moderator
    For the Quest, the comparison is a little different. The Qualcomm Adreno GPUs used by the Go, Quest and all higher Snapdragon SOCs don't use GDDR5 or GDDR6. They run on LPDDR4 (Go) and LPDDR4X (Quest and all later Qualcomm GPUs). That's Low Power DDR4.
    HBM2 runs at 1.2-1.35v. LPDDR4X runs at 0.6-1.1v.

    HBM2 does look good for PC VR though.

  • hoppingbunny123hoppingbunny123 Posts: 713
    edited January 12
    is that a big enough difference to lose the benefit of using hbm2 for a snapdragon, cost aside since with mass manufacturing the hbm2 costs go down. especially if a large battery on the strap at the back of the head was used as a counterweight.
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