SpeedGrade. Choppy EXR playback

We are having issues playing EXR's (B44) on our SpeedGrade systems... The playback is very choppy since it looks like it only buffers a couple frames at a time even when cache size is set to 80%. Once the sequence is fully buffered (played all the way through) it seems to play just fine the second time. Is there a setting I am missing to get it to roll through the sequence with no stoppage the first time? Is SpeedGrade converting these files to another format to RAM when caching? We have tested this on multiple machines and have seen the same problem on each.
The machine I am currently testing is a beast of a machine:
Xeon dual 16 core
124GB of RAM
8GB Quadro K5200 GPU
Windows 8
SpeedGrade CC (2014)
This should be more than enough power to handle this if it were a hardware issue. This leads me to believe it is a software issue... Does anyone know if SpeedGrade is capable of real-time playback of B44 EXR's? If so, what are we doing wrong? Oh, we also set up a RAM disk to rule out a hard drive bottleneck.
Any ideas would be appreciated! Thanks!

I've Done a lot of investigating into this and it is due to the way that the software team has implemented the decompress for exrs.
Currently I can cache uncompressed exrs in real time (24 + fps) and thus can watch a whole film in 1 go with no stutter. However this is not the case with any of the compressed exrs the max read speed i can get is 16 FPS
which suggests its to do with the decompressor .
It definitely not the hardware as on the same machine with RV i can get 24 fps+ with the same compressed files.
This has always been a problem since the Iridas Days I'm betting no one has looked that code block for loading exrs for years ( if it ain't broke, don't fix it)
More and More footage is coming through in HDR file types and exr is very popular in the VFX industry ... it would be well worth the software team sorting this out as more and more team i know are using RV as there main player now and this will start pushing them into the autodesk eco-system for solutions.
It would be interesting to see what the software teams view is on this
Robin

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About AirPlay Mirroring in OS X - Apple Support
http://support.apple.com/en-us/HT201343
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QuickTime plugin.plugin
Quicktime plugin.webplugin
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RealPlayer 11 (which is no longer in beta) for Mac from:
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Flip4Mac WMV Player from http://www.microsoft.com/windows/windowsmedia/player/wmcomponents.mspx (Windows Media Player for the Mac is no longer supported, even by Microsoft)
Perian from http://perian.org/
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