Arc A750 comes with 8GB and 28 Xe cores - Arc A770 with 16GB and 32 Xe cores - Bark Sedov
Arc A750 comes with 8GB and 28 Xe cores – Arc A770 with 16GB and 32 Xe cores

Arc A750 comes with 8GB and 28 Xe cores – Arc A770 with 16GB and 32 Xe cores

Arc A750 comes with 8GB and 28 Xe cores – Arc A770 with 16GB and 32 Xe cores

intel-arc-a-2022More and more details about the two fastest arc cards of the Alchemist generation are becoming known more and more drop by drop and not via the usual channels. So far, only the technical data of the Arc A380 are officially known – also because they have been available in China for a few weeks and have been exported worldwide.

Intel sent some more interesting information yesterday via Discord or to the participants of the community competition (via Evan Stenger), which were also previously unknown in this form or have not yet been confirmed.

The Arc A750 will have 8 GB of GDDR6 memory and the Arc A770 will have 16 GB. This was published as part of the information to the winners of such a card. Intel is also asking the winners to be patient. The cards are expected shortly, but plans to release the samples to the press first.

Comparison of the Arc Mobile variants
A380 A750 A770
Xe cores 8th 28 32
shader units 1,024 3,584 4,096
Ray Tracing Units 8th 28 32
GPU clock
GDDR6 memory 6GB 8GB 16 GB
memory interface 96 bits 256 bits 256 bits
connection 8x PCIe 4.0 16x PCIe 4.0 16x PCIe 4.0
TDP 75W 225W 225W

So far it has been assumed that the Arc A750 will have 24 Xe cores and accordingly 3,072 shader units, but in fact it should now be 28 Xe cores and 3,584 shader units. This got loud Moritz Lehman confirmed by Intel – also via Discord.

The Arc A770 has 32 Xe cores and 4,096 shader units. The number of ray tracing units corresponds to the Xe cores. The cards use the ACM G10 GPU, which has a 16 MB L2 cache to offer. The connection is made via 16 PCI Express lanes. Thus, based on the technical data, the Arc A750 and Arc A770 are quite close together.

There are no further details on the Arc A580, the mid-range solution. This also offers 8 GB of graphics memory, which, however, is only connected via a 128-bit wide memory interface. In addition, the TDP should be 175 W here.

Another custom model of the Arc A380

In Asia, another custom design has now appeared alongside the Gunnir Arc A380 Photon 6G. This is a model from ASRock. This manages with a single large axial fan and is supplied with power via an 8-pin connector in addition to the slot.

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Resizable BAR also works on AMD platform

Contrary to what was previously assumed and also described in Intel’s Reviewers Guide, Resizable BAR (rBAR) also seems to work on AMD’s Ryzen platform. The colleagues from ComputerBase tried this with a Ryzen 5 5600X on an ASUS ROG Strix B550-E Gaming and found that the Arc A380 achieves the same level of performance as with a Core i5-12500 and turning off rBAR also results in a large drop in performance.

According to Intel, rBAR could no longer be validated sufficiently, but it is expected that it will work (which it seems to do) and, above all, that it will work well with the other cards at the latest.

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