j"1LAnZuoQdcKCkpDBKQMCgziGMoPC4VQUckMi<div class="post"><div class="quoteheader"><a href="https://bitcointalk.org/index.php?topic=648.msg9128#msg9128">Quote from: sgtstein on August 13, 2010, 11:17:51 PM</a></div><div class="quote">1. Do we know why it doesn't work on 32bit? Is is it because it's using 128bits and if so, would it help if we dropped it to 64?<br/></div><br/>No idea, maybe some alignment problem. Someone was trying to figure it out on IRC. I don't have a SSE2 capable 32bit system. The additional registers in 64bit mode are also useful. I don't know if your PE2650 has a recent enough CPU. You might experience a performance drop of 50% if the CPU is too old.<br/><br/>Btw, did anyone with Intel CPU compare performance with Hyperthreading enabled/disabled? The SSE2 loop keeps the arithmetic units and pipelines pretty busy and I can imagine Hyperthreading might decrease performance.</div> text/html
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