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Motherboard and memory compatibility

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Anonymous
a b V Motherboard
a b } Memory
October 11, 2010 8:27:18 PM

Hello,
I’m relatively new to the more recent technology and haven’t really built a computer in 8 years. I just bought parts to upgrade and purchased an ASUS p7p55d-e pro and also purchased patriot sector 7 3x2GB pc3-12800 1600MHz. before I open the memory does anyone know if this is compatible with this mother board at 1600MHz speeds and for 6Gb… thanks
a c 207 Ĉ ASUS
a c 717 V Motherboard
a c 347 } Memory
October 11, 2010 9:31:46 PM

Welcome Newcomer! :) 

First, Patriot is the most problematic RAM I've seen posted here, so I wouldn't even open it. Worst, you choose Tri-Channel RAM versus Dual-Channel.

Preferred RAM {Corsair, GSKILL, Mushkin & Kingston} ; Budget RAM Crucial.

Next, Certified RAM {ASUS QVL} and Tested RAM is the smartest choice because you know it will {if not damaged} work on your MOBO and be trouble free.

Certified RAM ASUS {QVL/Memory Support List} - http://usa.asus.com/product.aspx?P_ID=T2FxW2fXGZQgSn2V
Tested RAM Corsair - http://www.corsair.com/configurator/product_results.asp...

High Performance:
$115 CORSAIR DOMINATOR 4GB (2 x 2GB) DDR3 1600 (PC3 12800) CMP4GX3M2A1600C9 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...
High Capacity/Good Performance:
$180 CORSAIR XMS3 8GB (4 x 2GB) DDR3 1600 (PC3 12800) CMX8GX3M4A1600C9 - http://www.newegg.com/Product/Product.aspx?Item=N82E168...

Good Luck & I Hope this answers your question.
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October 11, 2010 10:16:23 PM

I have the non-"e" version of your motherboard, and I'm using Corsair XMS3. I wish I had bought Dominator, but in any event the XMS3 works great. Keep in mind it will not run at 1600 MHz unless you overclock the Processor. A BCLK of 160 and RAM multiplier of 10 will get you where you need to be. Otherwise it'll run at 1333 MHz, which is still plenty fast.
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Anonymous
a b V Motherboard
a b } Memory
October 11, 2010 10:18:04 PM

Thank you jacquith for your response... will there be a significant problem using Tri Channel instead of Dual channel. is the patriot brand a poor choice of brand in general or just with this particular ASUS board. thanks again for your help
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October 11, 2010 10:21:47 PM

Quote:
Thank you jacquith for your response... will there be a significant problem using Tri Channel instead of Dual channel. is the patriot brand a poor choice of brand in general or just with this particular ASUS board. thanks again for your help


The motherboard has 2 channels with 2 slots each. Running 3 sticks will cause 4 GB of the memory to operate at dual channel (128 bit) and 2 GB of the memory to operate at single channel (64 bit) since the 3rd stick doesn't have a counterpart in the other channel. It will work, but it's not an ideal configuration since 1/3 of the RAM is operating a 1/2 of it's optimal bandwidth.
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a c 207 Ĉ ASUS
a c 717 V Motherboard
a c 347 } Memory
October 11, 2010 10:26:57 PM

^ You are using a X58/1366 {I would guess Gigabyte} and also OC'ing your CPU with a BCLK of 160. Otherwise 1600/133.33 = 12 as the BCLK.

The P7P55D-E PRO is an 1156 and works differently, and 1600 MHz is native to the OP MOBO; instead the OP will simply AI OC Tuner {D.O.C.P.} | DRAM OC Profile {DDR3-1600MHz}, Save & Exit. All of the "calculations" are performed automatically.
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a c 207 Ĉ ASUS
a c 717 V Motherboard
a c 347 } Memory
October 11, 2010 10:36:36 PM

sgt bombulous said:
The motherboard has 2 channels with 2 slots each. Running 3 sticks will cause 4 GB of the memory to operate at dual channel (128 bit) and 2 GB of the memory to operate at single channel (64 bit) since the 3rd stick doesn't have a counterpart in the other channel. It will work, but it's not an ideal configuration since 1/3 of the RAM is operating a 1/2 of it's optimal bandwidth.

Correct and unfortunately (2) issues: 1. Frequently it doesn't and the reason is there are ~ dozen DIMM controllers and in the cases where I "know" it will work is when I notice Tri Channel Kits listed as Tested with along with the Dual/Quad Channel Kits; 2. Upon upgrading {adding a forth} completing the Quad Channel the (1) single DDR3 RAM stick must match the "odd" DDR3 from the prior Kit. All and all it is NOT worth the aggravation nor possible waste. I did NOT check with Patriot Tested RAM -- instead I am trying to suggest the Best Patrice and sharing my experiences with Patriot; it doesn't matter to me which brand of RAM you purchase.

It a case of Best Practices vs Maybe Practices.

Good Luck!
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Anonymous
a b V Motherboard
a b } Memory
October 11, 2010 10:58:14 PM

i have done a little big of research on line tri vs dual channel and found that the performance is only slightly better. i have an i7-860 processor. i've pretty much installed everything now except the RAM. after reading replies, should i just go ahead and return the RAM to newegg and just get dual channel.

here is one of the links if found on this subject
http://www.hardwarecanucks.com/forum/ram/18872-dual-cha...
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a c 207 Ĉ ASUS
a c 717 V Motherboard
a c 347 } Memory
October 11, 2010 11:13:37 PM

^ Yes, but you are confusing a Tri/Hexa Channel MOBO {1366/X58} with your Dual/Quad MOBO {1156/P55} - the RAM itself has "nothing" to do with the Channel configurations or speed.

I would strongly recommend the exchange.

The X58 has 6/Hexa slots; 2 pairs of 3/Tri Channel. -> the X58 runs 3 Sticks per Channel vs your 2 stick per Channel.

Does this make better sense now?
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Anonymous
a b V Motherboard
a b } Memory
October 11, 2010 11:57:58 PM

yes thank you very much for clearing things up. i'll be returning this memory and purchasing dual channel. thank you for your time and assistance once again
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October 12, 2010 2:18:06 AM

jaquith said:
^ You are using a X58/1366 {I would guess Gigabyte} and also OC'ing your CPU with a BCLK of 160. Otherwise 1600/133.33 = 12 as the BCLK.

The P7P55D-E PRO is an 1156 and works differently, and 1600 MHz is native to the OP MOBO; instead the OP will simply AI OC Tuner {D.O.C.P.} | DRAM OC Profile {DDR3-1600MHz}, Save & Exit. All of the "calculations" are performed automatically.


Were you talking to me? I have an LGA1156 board, the P7P-55D-Pro. I prefer using the manual profile over XMP because using XMP decreases your CPU multiplier to 17, with no real overclock.
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a c 207 Ĉ ASUS
a c 717 V Motherboard
a c 347 } Memory
October 12, 2010 2:41:10 AM

Top paragraph yes, second paragraph no. Memory Multiplier is typically unique to Gigabyte MOBO's.

I agree about XMP, it's more trouble than a help. People constantly misuse the setting and results more often in Post Failure/ustable system/BSOD.

I am doing this on an iPhone so I hope I reread the who is who and what is what correctly and apologize if mistaken.

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