DDR3 Memory Round-Up: Corsair, Kingston, OCZ, Super Talent
At first glance, the Kingston KHX11000D3ULK2/2G memory kit looks just like the KHX11000D3LLK2/2G shown on the previous page, save for the different decals affixed to its heatspreaders with the kits model number and specifications. But the KHX11000D3ULK2/2G is actually quite different, at least from a performance standpoint.
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"Kingston's KHX11000D3ULK2/2G is a kit of two 128M x 64-bit 1GB (1024MB) DDR3-1375 CL5 SDRAM (Synchronous DRAM) "ultra low latency" memory modules, based on sixteen 64M x 8-bit DDR3 FBGA components per module. Each module pair has been tested to run at DDR3-1375MHz at a low latency timing of 5-7-5 at 1.8V. The SPDs are programmed to JEDEC standard latency DDR3-1333Mhz timing of 8-8-8 at 1.5V. Each 240-pin DIMM uses gold contact fingers and requires +1.5V. The JEDEC standard electrical and mechanical specifications are as follows:"
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Kingston's KHX11000D3ULK2/2G Low Latency DDR3 Kit
Like the KHX11000D3LLK2/2G memory kit we showed you earlier, Kingston's KHX11000D3ULK2/2G kit is rated for operation at PC3-11000, or DDR3-1333 speeds. This memory kit also features the same basic, blue aluminum heatspreaders and is comprised of a matched pair of 1GB DIMMs. The Kingston KHX11000D3ULK2/2G kit, however, features much lower supported timings of 5-7-5-15 at 1.8v (as opposed to 7-7-7 on the KHX11000D3LLK2/2G kit). As we mentioned in our introduction a few pages back, one of the major complaints voiced regarding early DDR3 memory samples was their relatively high latencies. As CAS 5 at 1333MHz though, Kingston's kit features some of the lowest latencies of any high-speed DDR3 memory kit.
