ddr3-1333-vs-1866 Comparision between Corsair Vengeance Pro 2 x 8GB (C9) in stock (1333MHz) vs. XMP (1866MHz) with a i7-4790K CPU on an Asus Gryphon Z97 motherboard. RAM part number CMY16GX3M2A1866C9. DDR3-1333: Processor: Intel Core i7-4790K @ 4.00GHz (8 Cores), Motherboard: ASUS GRYPHON Z97 ARMOR EDITION, Chipset: Intel 4th Gen Core DRAM, Memory: 16384MB, Disk: 256GB Samsung SSD 850, Graphics: Intel Xeon E3-1200 v3/4th Gen Core IGP, Audio: C-Media CMI8788, Monitor: E2350, Network: Intel Connection OS: CentOS 6.6, Kernel: 2.6.32-504.el6.x86_64 (x86_64), Compiler: GCC 4.4.7 20120313, File-System: ext4, Screen Resolution: 1920x1080 DDR3-1866: Processor: Intel Core i7-4790K @ 4.00GHz (8 Cores), Motherboard: ASUS GRYPHON Z97 ARMOR EDITION, Chipset: Intel 4th Gen Core DRAM, Memory: 16384MB, Disk: 256GB Samsung SSD 850, Graphics: Intel Xeon E3-1200 v3/4th Gen Core IGP, Audio: C-Media CMI8788, Monitor: E2350, Network: Intel Connection OS: CentOS 6.6, Kernel: 2.6.32-504.el6.x86_64 (x86_64), Compiler: GCC 4.4.7 20120313, File-System: ext4, Screen Resolution: 1920x1080 AIO-Stress 0.21 Test: Random Write MB/s > Higher Is Better DDR3-1333 . 4443.00 |======================================================== DDR3-1866 . 4581.54 |========================================================== SQLite 3.7.3 Test Target: Default Test Directory Seconds < Lower Is Better DDR3-1333 . 100.51 |=========================================================== DDR3-1866 . 97.35 |========================================================= Unpacking The Linux Kernel linux-2.6.32.tar.bz2 Seconds < Lower Is Better DDR3-1333 . 6.91 |============================================================= DDR3-1866 . 6.77 |============================================================ Timed PHP Compilation 5.2.9 Time To Compile Seconds < Lower Is Better DDR3-1333 . 21.61 |============================================================ DDR3-1866 . 19.81 |======================================================= Parallel BZIP2 Compression 1.1.6 256MB File Compression Seconds < Lower Is Better DDR3-1333 . 6.33 |============================================================= DDR3-1866 . 5.87 |========================================================= Gzip Compression 2GB File Compression Seconds < Lower Is Better DDR3-1333 . 9.38 |============================================================= DDR3-1866 . 9.32 |============================================================= LAME MP3 Encoding 3.99.3 WAV To MP3 Seconds < Lower Is Better DDR3-1333 . 10.88 |============================================================ DDR3-1866 . 10.88 |============================================================ GnuPG 1.4.10 1GB File Encryption Seconds < Lower Is Better DDR3-1333 . 6.68 |============================================================= DDR3-1866 . 6.65 |============================================================= System XZ Decompression Phoronix Test Suite v5.4.1 Seconds < Lower Is Better DDR3-1333 . 3.73 |============================================================= DDR3-1866 . 3.70 |============================================================= OpenSSL 1.0.1g RSA 4096-bit Performance Signs Per Second > Higher Is Better DDR3-1333 . 687.90 |======================================================== DDR3-1866 . 728.83 |=========================================================== PostgreSQL pgbench 8.4.11 TPC-B Transactions Per Second TPS > Higher Is Better DDR3-1333 . 959.89 |========================================================= DDR3-1866 . 999.36 |=========================================================== PyBench 2008-08-14 Total For Average Test Times Milliseconds < Lower Is Better DDR3-1333 . 1724 |============================================================= DDR3-1866 . 1720 |============================================================= Apache Benchmark 2.4.7 Static Web Page Serving Requests Per Second > Higher Is Better DDR3-1333 . 27128.01 |====================================================== DDR3-1866 . 28816.11 |========================================================= PHPBench 0.8.1 PHP Benchmark Suite Score > Higher Is Better DDR3-1333 . 135950 |=========================================================== DDR3-1866 . 136464 |===========================================================