Yeah I'd say so. I compared 200Mhz at stock CPU to 200Mhz at 1.977 GHz on the 183 so I saw similar scores for both and new it was working.
So, PC3200 you get like 3.1GB/s. You just gotta scale your rating up with your clock. PC4000 is 250MHz, so yeah you look like you're scoring about right. The crazy efficency of the A64 memory controller lets you almost directly compare PCxxxx ratings to your test results.
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