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20130524.html
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<html><head><link rel="stylesheet" href="style.css"></head><body><div class="page">
<h1>20130524 - AMD GCN GPU Scaling : Tablet To Desktop</h1>
<br>
Looking at single GPU products, here is a quick estimation of GPU performance scaling based off numbers from the internet,<br>
<br>
<pre>PRODUCT FORM TDP(W) Xbox360 Factor
---------- ---------------- ------ --------------
A4-1200 Thin Tablet 4 0.25x
A6-1450 Thick Tablet 8+ 0.4x
A4-5000 Small Netbook 15 0.5x
A10-5757M Largest Netbook 35 2.2x
HD7970M Largest Notebook 75 8.5x
HD7750 $100 Desktop GPU 75 3.6x
HD7970 GHz $500 Desktop GPU 250 16.8x</pre>
<br>
The "thin tablet" probably is in the iPad4 size and power range, and looks to have similar GPU perf (1/4 of an Xbox360) but with a full DX11.1 feature set. The "thick tablet" almost reaches 1/2 Xbox360 range when in the increased clock state (a state which might be possible when plugged into a wall outlet). Integrated CPU/GPU beyond tablet ranges from 1/2x to 2x an Xbox360. Non-integrated GPU for notebook climbs to over 8x a Xbox360 on the high end. Current desktop GPUs starting at $100 are almost 4x an Xbox360, with high end non-SLI over 16x.<br>
<br>
Total scaling range from tablet to desktop in this table is 1:64. If one targets 1080p/60Hz at roughly 8x the Xbox360 performance, scaling up to non-SLI highend PC provides 1440p/60Hz. The drop to largest netbook is a 4x perf loss from the target, probably requiring scaling geometry down by 4x, then dropping to 30Hz with half cost pixel shading (reduce post, lower complexity lighting, etc). Hitting a tiny 15W netbook requires another 4x scaling perhaps to 540p/30Hz with 4x cut in geometry.<br>
<br>
This example 8x Xbox360 perf target in notebook form can be purchased currently for around $1100 (<a href="http://www.xoticpc.com/msi-gx60-1ac021us-p-5009.html">MSI GX60 1AC-021US</a>).
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index.html
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<a href="20130707.html">20130707 - Slab Hash</a><br>
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<a href="20130524.html">20130524 - AMD GCN GPU Scaling : Tablet To Desktop</a><br>
<br>
<a href="20130325.html">20130325 - Understanding WIN32 GetRawInputBuffer()</a><br>
<br>
<a href="20130226.html">20130226 - Shader Aliasing and Small Triangles</a><br>