Let's start with the comparison between DDR3 2400 and DDR3 2800. Enable XMP in UEFI BIOS. The first pic is DDR3 2400 CL11 14-14-35 2T. Hyper PI 32M X 8 => 11m 39.698s The 2nd pic is DDR3 2800 CL11 14-14-35 2T Hyper PI 32M X 8 => 11m 24.254s Hyper PI 32M can test stability and arithmetic performance. You can see DDR3 2800 is 15 seconds faster than DDR3 2400. CrystalMark 2004R3 MEM => 83220 MaXXMEM Memory-Copy - 27972 MB/s CrystalMark 2004R3 MEM => 91528 MaXXMEM Memory-Copy - 29007 MB/s DDR3 2800在CrystalMark 2004R3 MEM is about 9.9% higher. MaXXMEM Memory-Copy is 3.7% higher. ADIA64 Memory Read - 23600 MB/s ADIA64 Memory Read - 26037 MB/s ADIA64 Memory Read DDR3 2800 improves about 10.3%. Then, I installed SoftPerfect RamDisk. I set 8192MB capacity for RamDisk test. PCMark Vantage Memories Score => 14297 / HDD Score 1438588 PCMark Vantage Memories Score => 14428 / HDD Score 1435109 In PCMark Vantage test, no matter Memory or RamDisk HDD test, you can see the difference is minor. ATTO DISK Benchmark max read is 4093.6 Mb/s and write is 3286.8 MB/s. CrystalDiskMark Seq Read - 12702 MB/s Write - 15024 MB/s ATTO DISK Benchmark max read is 4160.7 Mb/s and write is 3807.2 MB/s CrystalDiskMark Seq Read - 13094 MB/s Write - 15086 MB/s After RamDisk, DDR3 2800 performance improves in most benchmark software. Maybe the performance is much higher than the regular usage, the DDR3 clock impact becomes smaller. Ivy Bridge structure, when set CPU frequency as 100MHz, max DDR3 clock is 2800. Even though, the DRAM quality really impacts the DDR3 2800 stability. The CPU built-in Memory Controller must be good, also the MB. There are many conditions. However, DDR3 2800 bandwidth is worth for that. |
After then, I fine tune it to DDR3 2800 CL11 14-14-35 1T 1.65V. The official spec 2T with 1.65V is more conservative. Hyper PI 32M X 8 => 11m 14.440s CrystalMark 2004R3 MEM => 95465 MaXXMEM Memory-Copy - 29007 MB/s ADIA64 Memory Read - 26384 MB/s SoftPerfect RamDisk PCMark Vantage Memories Score => 14892 / HDD Score 1507704 ATTO DISK Benchmark max read is 4227.9 Mb/s and write is 3496.3 MB/s CrystalDiskMark Seq Read - 13325 MB/s Write - 15267 MB/s DDR3 2800 at same CL and other parameters, 1T and 2T performance are similar. Most benchmark software above has better performance in 1T. However, 2T set up has better stability. As DDR3 2400 and 2800 difference, DDR3 high clock does have better bandwidth. I would like to mention AIRFLOW cooler temperature performance at DDR3 2800 2T setup. If without AIRFLOW, the max temperature is around 47.5, otherwise it's about 37.6. The temperature drops 9.9 degree C. It's helpful for stability for sure. Intel new structure always advantages DDR3. Either pull higher clock or performance improved as same bandwidth. Last generation, Sandy Bridge, max is DDR3 2133. Ivy Bridge max is DDR3 2800. Regarding to DDR3 clock improvement, if CPU clock can pull higher than 100MHz, the clock will be higher. These 2 generations structure sync CPU clock with PCI-E clock. If you pull CPU clock too high, the system stability is a question. So this review only set CPU clock at 100MHz. CORSAIR most high end DDR3 product line, Dominator Platinum, has several clocks. The official site shows 5 models from DDR3 1600 to DDR3 2800. Higher clock is higher price. DDR3 is no more competition for clock performance and capacity. As RamDisk software becomes more popular, more DDR3 capacity provides richer and more convenient applications. Especially, the incredible bandwidth leverages the performance. This review, Dominator Platinum DDR3 2800 CL11, performance is excellent. I hope it will have 8GX4 version soon. It will show us another milestone of DDR3 performance. DDR3 can be higher or not? 8G price can be more parity? I think these are what end users care about. Hopefully, after 2nd June, Intel new Haswell structure will fly over DDR3 3000. :) This article is also post in my blog - WIND3C, Any comments are welcome. |
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