BH-5

From IeXwiki

Manufactured RAM modules by Winbond, these modules were considered an "overclockers dream". Being able to hit speeds of over 550mhz effective at 2-2-2-5 Latency Timings, the only draw back is Winbond stopped manufacturing these and now makes UTT-BH/CHx modules which can sometimes hit the same speeds, but in many cases won't. Some people have gotten over 575mhz with 3.3 volts or more. The only other RAM modules for serious overclocking are TCCD modules, which is now the standard.