phenom X4 II vs Phenom X4

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POSTER: computer news   ||   PHENOM X4 II VS PHENOM X4	DATE:2008-12-21
We already reported that the performance of phenom X4 II exceeds Phenom X4 by 5-15%, depending on the task type  . The considerable superiority degree is ensured by the cache in the third level , increased from 2 to 6 Mb.   AMD, published a complete list of differences in the new Phenom X4 II from the old Phenom X4: 45 NM technological manufacturing process, allow  to increase the core clock frequencies and to decrease currents leakage . Increased cache in the third level. Most noticeable for user change. It will increase the performance in the dependant on cache volume  tasks, such as games. Cache access time ( the third level ) was reduced by 2 times. this will give a small acceleration. Increase in the memory capacity .  If we examine the server versions shanghai and Barcelona core, then Shanghai can support DDR 2-800, while Barcelona is limited to DDR 2-667 support. Furthermore, the memory controller in k10  processors works at separate frequency, which is lower than the core frequency . The L1 and L2 caches are copied in L3 cache, and the core being located in the economical regime, consumes less energy than predecessor. The predictor of indirect passages appeared. Thus, the effectiveness of predictor will be a little improved. Two-fold increase in the capacity of  protocol demands , maintenance of caches coherence  . This will allow  to increase the performance in multi-threaded tasks. Increased buffer devices , floating-point calculations. Let us leave the remained changes without commentaries, since they are completely specific: Increased performance in a number of cases with the use of LOCK prefix . Improved performance of displacement instruction with floating points between the processor registers  . It is worthwhile to note that different improvements in the core micro-architecture, are capable of ensuring, on average, only 3% of advantage in comparison with Agena core  , and basic increase is ensured by the cache and increased clock frequencies. Related Products :

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