blöderidiot
Captain
- Registriert
- Juni 2004
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Dazu gab es gestern einen interessanten Test. 3700X, 3900X und 9900K auf 4.0GHz genagelt. Ergebnis (u.a.): 3700X (8 Kerne/ein CCD) ist Speicher-Schreib-Bandbreiten-limitiert (gegenüber 3900X, zwei CCD):PS828 schrieb:Man darf hier aber nicht vergessen dass AMD für die gleiche Leistung signifikant weniger takt benötigt.
"After discussing this with AMD, they explained they made a compromise here as client workloads do very little writing. Rather than using this space to improve something that isn’t needed, they invested the silicon real estate in more beneficial ways to achieve performance gains.
The end result being that the Core Complex Die to IO Die link for reading memory is 32 bytes wide, but it’s only 16 bytes wide for writing, and this is why the peak write bandwidth is effectively cut in half. However, because the 3900X has two CCDs it features two 16 bytes wide lanes for writing and this brings the peak bandwidth back up to around 50 GB/s."