AMD Radeon HD 7870 and 7850 Review @ VRZone

Published: Mar 5th 2012, 04:38 GMT

AMD Radeon HD 7800 Series enters the fray just in time to fight GK104 by
The tropical island adventure continues, this time with Pitcairn – after addressing both the high end and the “mainstream” with the HD7900 and HD7700 series respectively, AMD now goes for the sweet spot in-between with the HD7800…

Contrary to its CPU line-up, AMD has enjoyed blistering success in the GPU arena for quite a while now, and its newest generation GPU continue the same – from being able to get away with charging pretty high prices for the high-end HD7970 and HD7950 yet keep the sales going, to the mainstream HD7700 parts wirh decent performance despite only 128-bit memory bus. The Catalyst drivers seem to be improving along the way too, and the OEM vendors are given more freedoms for custom designs earlier in the product lifecycle.

The new HD7800 ‘Pitcairn’ series, that Lennard has a look at today, continues the same tradition, filling in the gap between the two already announced lines for the US$ 300-class sweet price spot that would expect higher sales volumes than the HD7900, yet at higher margins than the HD7700 parts. The 256 bit GDDR5 memory bus wih 160 GB/s memory bandwidth, and 2 GB memory capacity are the first in class for this price level, aside from 32 ROPs, 1,280 stream processors (20 Computer Units – CU) and, very importantly, 160 GFLOPs Double Precision floating point. While this is far behind the high end HD7900 series, this is the first serious DP FP performance enablement in the below US$300 price class in any GPU around, important for GPGPU applications that need double precision.

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