i'm gonna upgrade my ram and i'd like to know if is possible to use 1,65 volt ram on i5 750 and asrock p55 extreme. i can't find specs on intel site...and in other places people say that 1.5 is max volts...in other that 1.65 is the max volts supported for ram. plz help me.
im lookink at this one
4GB (2GB 256M x 64-Bit x 2 pcs.)
DDR3-1333MHz CL7 240-Pin DIMM Kit
Kingston's KHX1333C7AD3K2/4G is a kit of two 256M x 64-bit (2GB) DDR3-1333MHz CL7 SDRAM (Synchronous
DRAM) memory modules, based on sixteen 128M x 8-bit DDR3 FBGA components per module. Total kit capacity is
4GB. Each module has been tested to run at DDR3-1333MHz at a low latency timing of 7-7-7-20 at 1.65V. The SPDs are programmed to JEDEC standard latency DDR3-1333MHz timing of 9-9-9 at 1.5V. This 240-pin DIMM uses gold
contact fingers and requires +1.5V. The JEDEC standard electrical and mechanical specifications are as follows:JEDEC standard 1.5V ± 0.075V Power Supply
VDDQ = 1.5V ± 0.075V
667MHz fCK for 1333Mb/sec/pin
8 independent internal bank
Programmable CAS Latency: 5,6,7,8,9,10
Programmable Additive Latency: 0, CL - 2, or CL - 1 clock
Programmable CAS Write Latency(CWL) = 7(DDR3-1333)
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
PCB : Height 1.180” (30.00mm), double sided component
1.65 is the standard voltage for good ram kits, and that Kingston kit is good i own one. If you try to OC that i5 750 you might need to get 1600+ ram kits because 1333 will limit your OC. Of course you an run them at lower speed if you plan to OC, but if the price gap isn't big i would go for 1600mhz ram.
I understand you would like to know if the Intel® Core™ i5 processors support 1.65V memory.
None of the Intel® Core™ i3, Intel® Core™ i5 nor Intel® Core™ i7 processors support 1.65V. All of them support a memory voltage of 1.5V, no more than 1.60V. The information can be located at the respective processor’s datasheet. The datasheets can be found by searching the model number of the processor, on the left side at the following web site: http://ark.intel.com/Default.aspx
You can use RAM with 1.5-1.65v spec. Yes, 1.5v would be preferred but up to 1.65v is usable and will not damage the processor. On most boards, even the low-voltage 1.35v RAM is usable. It doesn't really do any good, but it's usable.