Kingston HyperX PC3-11000 CL7 DDR3 2gb Kit
With the event of Intel's extremely overclocker friendly P35 chipset and the impending release of the X38 chipset, many people are having a hard time deciding whether their next PC upgrade should be DDR2 or DDR3 based. For those of you who are regular readers of Overclock3D reviews, you would have seen our recent DDR2 vs DDR3 review where we put the Asus P5K (DDR2) head-to-head with the Asus P5K3 (DDR3).
However, one thing we haven't taken a close look at yet is how DDR3 performs in terms of overclocking compared with its DDR2 counterpart. With this in mind, today we have decided to take a closer look at the Kingston HyperX PC3-11000 CL7 kit used in some of our recent motherboard reviews.
For most of us, Kingston needs no introduction. Founded in 1987 and one of the largest memory manufacturers in the world, Kingston offers over 2,000 memory products for use in anything from PC's to Printers. More importantly to us, Kingston have a large foothold in the PC enthusiast sector with their high performance HyperX memory modules. Having reviewed several of the DDR2 based kits in the past (PC2-9600, PC2-8500), the HyperX linup has always impressed. Today we're going to be finding out if Kingston have managed to continue this trend with their PC3-11000 CL7 rated HyperX DDR3 based kit.
The following information has been taken directly from Kingston's website:
HyperX DDR3 features:
• 1.7 Volts operation
• Memory signal termination inside the memory chip (“On-Die Termination”) to prevent reflected signal transmission errors
• Operational enhancements to increase memory performance, efficiency and timing margins
• CAS Latencies: 5 (Ultra Low Latency) and 7 (Low Latency)
• Currently available in speeds up to 1.5GHz and capacities up to 2GB kits
• DDR3 memory modules are not backward compatible to DDR2 and DDR based motherboards, due to incompatible module connections (number of pins), voltage and DRAM technology. DDR3 memory modules have a different key or notch than the same-sized DDR and DDR2 modules to prevent their insertion into an incompatible memory socket. HyperX is available in single and dual-channel memory kits.
As we can see from the specifications above, the HyperX PC3-11000 kit requires 1.7v in order to run at its rated DDR3-1375 speed and 7-7-7-20 timings. Unfortunately Kingston haven't specified whether the modules are guaranteed to run higher than 1.7v, forcing overclockers to invalidate their warranty if they want to push the modules further by increasing the voltage.
More detailed information on the HyperX PC3-11000 modules can also be found in the specifications PDF available on their website. A snippet of this information is shown below:
• JEDEC standard 1.5V ± 0.075V Power Supply
• VDDQ = 1.5V ± 0.075V
• 533MHz fCK for 1066Mb/sec/pin/
• 8 independent internal bank
• Programmable CAS Latency: 5,6,7,8,9,10
• Posted CAS
• Programmable Additive Latency: 0, CL - 2, or CL - 1 clock
• Programmable CAS Write Latency(CWL) = 7(DDR3-1066)
• 8-bit pre-fetch
• Burst Length: 8 (Interleave without any limit, sequential with starting address “000” only), 4 with tCCD = 4/ which does not allow seamless read or write [either on the fly using A12 or MRS]
• Bi-directional Differential Data Strobe
• Internal(self) calibration : Internal self calibration through ZQ pin (RZQ : 240 ohm ± 1%)
• On Die Termination using ODT pin
• Average Refresh Period 7.8us at lower then TCASE 85°C, 3.9us at 85°C < TCASE . 95°C
• Asynchronous Reset
• 1066Mbps CL7 doesn’t have backward compatibility with 800Mbps CL5
• PCB : Height 1.180” (30.00mm), double sided component
• CL(IDD) - 7 cycles
• Row Cycle Time (tRCmin) - 50.63ns (min.)
• Refresh to Active/Refresh Command Time (tRFCmin) - 90ns
• Row Active Time (tRASmin) - 37.5ns (min.)
• Power TBD W (operating)
• UL Rating - 94 V - 0
• Operating Temperature - 0o C to 85o C
• Storage Temperature -55o C to +100o C