Different revisions of the same RAM will have different xmp profiles. So for example if you buy kingston hyper x fury in 2017, and then another stick in 2020, it will likely contain different timings on the xmp profiles. For example, there was an update to hyper x fury timings on retail hyper x fury ram at the end of 2019. Also, retail hyper x from amazon ALWAYS has different timings than Dell oem hyper x fury ram. If the ram has different xmp profiles, they cannot be run with xmp enabled, because only one profile can run at a time. This is different from being matched, as you can often run mismatched ram it will default to the slowest common denominator if possible.
What does xmp compatible mean? Ram needed to match exactly since both chips will run at slower speed. Check your manual. It says 2400 mhz is the basic setup. You can install 2 chips of HyperX FURY DDR4 XMP at 2667 MHz You have 4 slots for ram and need to install in certain slots.
The max in each slot is 8 gb if 2 slots are used. Single slot uses one chip of 16 but you cannot use 2 x 16. See the requirements on p 55-56 of the service manual.
ok so just to clarify if you have one 16gb 3200mhz stick of ram you cannot add another? You have to purchase four sticks at 8gbs to achieve 32gbs of ram? So i can purchase 3 extra 16gb sticks to achieve 64gbs of ram? And i thought they were identical since they are both hyperx 16gb 3200mhz ddr4. What am i missing? @Mary G
Also if you get the same ram but not in a matched set, you may experience issues running it in dual channel mode. For example, the computer may boot fine but you experience an occassional freeze or blue screen. That's why its important to test the ram works together, if not, return it. For example, here is what mismatched "identical" ram stucks purchased individually might show during an overnight test:
And this is what a matched set should look like, which is why its important where possible to purchase matched sets as you may not know what havoc the ram is causing to your system behind the scenes
r72019
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October 23rd, 2020 16:00
Different revisions of the same RAM will have different xmp profiles. So for example if you buy kingston hyper x fury in 2017, and then another stick in 2020, it will likely contain different timings on the xmp profiles. For example, there was an update to hyper x fury timings on retail hyper x fury ram at the end of 2019. Also, retail hyper x from amazon ALWAYS has different timings than Dell oem hyper x fury ram. If the ram has different xmp profiles, they cannot be run with xmp enabled, because only one profile can run at a time. This is different from being matched, as you can often run mismatched ram it will default to the slowest common denominator if possible.
Mary G
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October 23rd, 2020 12:00
What does xmp compatible mean? Ram needed to match exactly since both chips will run at slower speed. Check your manual. It says 2400 mhz is the basic setup. You can install 2 chips of HyperX FURY DDR4 XMP at 2667 MHz You have 4 slots for ram and need to install in certain slots.
The max in each slot is 8 gb if 2 slots are used. Single slot uses one chip of 16 but you cannot use 2 x 16. See the requirements on p 55-56 of the service manual.
Crucial is a good place to buy ram.
dundun305
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October 23rd, 2020 13:00
Sorry for the confusion its a R7
dundun305
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October 23rd, 2020 13:00
@Mary G Also I own a r7 which states this configuration is acceptable. https://topics-cdn.dell.com/pdf/alienware-aurora-r7-desktop_service-manual_en-us.pdf
dundun305
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October 23rd, 2020 13:00
ok so just to clarify if you have one 16gb 3200mhz stick of ram you cannot add another? You have to purchase four sticks at 8gbs to achieve 32gbs of ram? So i can purchase 3 extra 16gb sticks to achieve 64gbs of ram? And i thought they were identical since they are both hyperx 16gb 3200mhz ddr4. What am i missing? @Mary G
r72019
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October 23rd, 2020 16:00
Also if you get the same ram but not in a matched set, you may experience issues running it in dual channel mode. For example, the computer may boot fine but you experience an occassional freeze or blue screen. That's why its important to test the ram works together, if not, return it. For example, here is what mismatched "identical" ram stucks purchased individually might show during an overnight test:
r72019
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October 23rd, 2020 16:00
I have 64 gb ram in my R7
r72019
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October 23rd, 2020 16:00
And this is what a matched set should look like, which is why its important where possible to purchase matched sets as you may not know what havoc the ram is causing to your system behind the scenes
dundun305
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October 23rd, 2020 17:00
Thanx, I was told something similar from Kingston.