1.65v Ram in haswell?

[koolbhoy-1329529]

Well i was about to buy RAM Kingston HyperX 2400mhz (1.65v) and my friend told me to make sure to check the voltage on the RAM to make sure it will be compatible with Intel Haswell. Apparently Haswell, SB and IB are all recommended a RAM voltage of 1.5v and running anything higher leads to warranty being void and an increased chance of things going wrong for the CPU!

Now my question is: Is this true? Can i Run 1.65v RAM or do i have to stick with 1600mhz 1.5v RAM?

Thank you.

 

[Novuake]

Yes its true. But you can get 1866MHz RAM at 1.5v too.

 

[koolbhoy-1329529]

Yes its true. But you can get 1866MHz RAM at 1.5v too.

am i better of going with the G skill Ripjaws X (1.5v) 1600mhz or the Corsair vengeance 1866mhz (1.5) <http://www.amazon.co.uk/dp/B004CRSM52/?tag=hydra0b-21&hvadid=11544485885&hvpos=1o2&hvexid=&hvnetw=g&hvrand=20991698981014388312&hvpone=&hvptwo=&hvqmt=&ref=asc_df_B004CRSM52 >

Is there any other lower voltage RAM that clocks at a higher speed 2133, 2400mhz at 1.5 volts..?

 

[JackNaylorPE]

Apparently Haswell, SB and IB are all recommended a RAM voltage of 1.5v and running anything higher leads to warranty being void and an increased chance of things going wrong for the CPU!.

Absolutely false ..... I can't understand why this misinformation continues to be propagated.

1.5 volts is for the JDEC profiles .... but most RAM speeds are advertised and labeled based upon their XMP profiles......most XMP profiles for i5 and i7 RAM is 1.65.

I have seen many posts saying "Well that's a MoBo manufacturer thing". No....Intel sets the XMP profile. I agree, Intel's JDEC specifications stipulate 1.5 volts .... for JDEC profiles ..... but XMP "allows compatible DDR3 memory to perform beyond standard specifications" and is "predefined and tested" by Intel

http://www.intel.com/content/www/us/en/gaming/gaming-computers/intel-extreme-memory-profile-xmp.html

Intel® Extreme Memory Profile (Intel® XMP) allows you to overclock compatible DDR3 memory to perform beyond standard specifications. It’s designed to enhance the gaming features built into Intel® technology–based PCs. If you like to overclock and squeeze as much performance from your PC as possible, then memory based on Intel XMP gives you that extra edge you need to dominate—without breaking a sweat.

Predefined and tested Intel XMP profiles can be loaded via BIOS or a specific tuning application through a computer’s operating system. Often the easiest way to load Intel XMP profiles is using a tuning utility, which may be available depending on the particular board manufacturer. To learn whether a tuning utility is available on your system, you should contact the board manufacturer.

Again, most listed compatible i5 / i7 RAM is 1.65 .... at least according to Intel's compatibility lists

http://www.intel.com/content/www/us/en/gaming/gaming-computers/core-i5-processor-memory-datasheet.html
http://www.intel.com/content/www/us/en/gaming/gaming-computers/core-i7-memory-suppliers-datasheet.html

Intel's approved i7 Compatibilty List for the 4770k (May 2013) includes:

12 1.65 volt modules
02 1.60 volt modules
09 1.50 volt modules

Intel's approved i5 Compatibilty List for the 4770k (May 2013) includes:

11 1.65 volt modules
00 1.60 volt modules
09 1.50 volt modules

As to speed, faster RAM and lower CAS do result in increased performance. Whether the % increase in performance is worth the increase in RAM price is questionable depending on what ya doing. However, if ya compare % performance increase with % increase in total system cost, it's not far from hard to make that argument.

 

[Novuake]

Yes its true. But you can get 1866MHz RAM at 1.5v too.

am i better of going with the G skill Ripjaws X (1.5v) 1600mhz or the Corsair vengeance 1866mhz (1.5) <http://www.amazon.co.uk/dp/B004CRSM52/?tag=hydra0b-21&hvadid=11544485885&hvpos=1o2&hvexid=&hvnetw=g&hvrand=20991698981014388312&hvpone=&hvptwo=&hvqmt=&ref=asc_df_B004CRSM52 >

Is there any other lower voltage RAM that clocks at a higher speed 2133, 2400mhz at 1.5 volts..?

Stick to 1866Mhz RAM, no point in spending more money on faster RAM on 1155/1150 as it gives you no benefit.
Try and find the Vengeance 1866MHz RAM that are low profile, those fins can interfere with some larger CPU coolers.

 

[koolbhoy-1329529]

Apparently Haswell, SB and IB are all recommended a RAM voltage of 1.5v and running anything higher leads to warranty being void and an increased chance of things going wrong for the CPU!.

Absolutely false ..... I can't understand why this misinformation continues to be propagated.

1.5 volts is for the JDEC profiles .... but most RAM speeds are advertised and labeled based upon their XMP profiles......most XMP profiles for i5 and i7 RAM is 1.65.

I have seen many posts saying "Well that's a MoBo manufacturer thing". No....Intel sets the XMP profile. I agree, Intel's JDEC specifications stipulate 1.5 volts .... for JDEC profiles ..... but XMP "allows compatible DDR3 memory to perform beyond standard specifications" and is "predefined and tested" by Intel

http://www.intel.com/content/www/us/en/gaming/gaming-computers/intel-extreme-memory-profile-xmp.html

Intel® Extreme Memory Profile (Intel® XMP) allows you to overclock compatible DDR3 memory to perform beyond standard specifications. It’s designed to enhance the gaming features built into Intel® technology–based PCs. If you like to overclock and squeeze as much performance from your PC as possible, then memory based on Intel XMP gives you that extra edge you need to dominate—without breaking a sweat.

Predefined and tested Intel XMP profiles can be loaded via BIOS or a specific tuning application through a computer’s operating system. Often the easiest way to load Intel XMP profiles is using a tuning utility, which may be available depending on the particular board manufacturer. To learn whether a tuning utility is available on your system, you should contact the board manufacturer.

Again, most listed compatible i5 / i7 RAM is 1.65 .... at least according to Intel's compatibility lists

http://www.intel.com/content/www/us/en/gaming/gaming-computers/core-i5-processor-memory-datasheet.html
http://www.intel.com/content/www/us/en/gaming/gaming-computers/core-i7-memory-suppliers-datasheet.html

Intel's approved i7 Compatibilty List for the 4770k (May 2013) includes:

12 1.65 volt modules
02 1.60 volt modules
09 1.50 volt modules

Intel's approved i5 Compatibilty List for the 4770k (May 2013) includes:

11 1.65 volt modules
00 1.60 volt modules
09 1.50 volt modules

As to speed, faster RAM and lower CAS do result in increased performance. Whether the % increase in performance is worth the increase in RAM price is questionable depending on what ya doing. However, if ya compare % performance increase with % increase in total system cost, it's not far from hard to make that argument.

I know you consider the XMP as safe due to the profiles being "Predefined and tested by intel" BUT would it be wise nevertheless to go for something like the GSkill Ripjaws X series 2133mhz which runs at 1.5v " http://www.amazon.co.uk/G-Skill-Ripjaws-DDR3-2133-Dual/dp/B0050119O0/ref=pd_cp_computers_2 " as opposed to Kingston HyperX 2400mhz " http://www.amazon.co.uk/gp/product/B008YAI7RG/ref=pd_lpo_k2_dp_sr_1?pf_rd_p=103612307&pf_rd_s=lpo-top-stripe&pf_rd_t=201&pf_rd_i=B008ZIL51W&pf_rd_m=A3P5ROKL5A1OLE&pf_rd_r=10SF4VK95PN46RQJZX97 "

Due to the performance difference between 2133mhz and 2400mhz being very minimal?

Also would you recommend CL9 9-9-9-24 (Corsair Vengeance 8Gb 1600mhz) OR CL11 11-11-11-30 (GSkill Ripjaws X 2133mhz)