Memory subsystem performance
A couple of quick synthetic memory benchmarks confirm our 1866MHz memory config is indeed both higher bandwidth and lower latency than our default 1333MHz setup. The A8-3850 with 1866MHz RAM manages more throughput in Stream than any flavor of Phenom II, and its memory latency is comparable.
However, these results also serve as a reminder of how proficient Intel's newer CPU architectures are at wringing as much as possible from their attached memory. The Core i3-2100 manages 5GB/s more throughput with 1333MHz DIMMs—at a 2T command rate, no less—than the A8-3850 does with 1866MHz DIMMs with a 1T command rate. The Intel processors hide access latencies better, too.
These differences are, in part, a result of Intel's use of larger caches with smart data pre-fetching algorithms that appear to make good guesses about what data our tests will request next. Llano adds a somewhat larger 1MB L2 cache per core and a tweaked pre-fetch algorithm, but it has also shed its L3 cache. In the grand scheme, the changes don't appear to add up to much.
|Windows 8.1 overtakes XP in market share, Win7 still on top||78|
|Star Wars: Battlefront alpha gameplay videos leak||24|
|North America's IPv4 address supply is running dry||43|
|Renée James steps down as Intel president||18|
|NoScript vulnerability allows malicious scripts to run unchecked||12|
|Canada Day Shortbread||45|
|Retail Fury X coolers still whine, don't include fix||156|
|GlobalFoundries completes IBM microelectronics acquisition||43|