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Memory Woes with the Gigabyte GA-790XTA-UD4... Which one!?

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June 7, 2010 5:21:04 PM

I have been starting the memory screen for a very long time, i cant pick out a suitable ram.. seems like everything is for p55 boards...

Gigabyte GA-790XTA-UD4 AMD790X ATX AM3 DDR3 2PCI-E 3PCI CrossFireX GBLAN SATA3 USB3.0 Motherboard

thats the mobo im going with

and this is the ram i have selection..

A-DATA Gaming Series AX3U1600GB2G9-2G 4GB 2X2GB DDR3-1600 CL9-9-9-24 Dual Channel Memory Kit
http://ncix.com/products/index.php?sku=52788

I keep hearing ppl say G.skill will work better.. but no one saying anything beyond that.. i need to make this order today.

the ram should be below 130 dollars..

its gonna work with phenom 955

thanks!
a b } Memory
a c 177 V Motherboard
June 7, 2010 6:06:06 PM

There are a large number of G.Skills on the memory compatibilty list, but be sure to read all the 'notes', many are limited to two DIMMs and subject to 'down-clocking'...

Some of the difficulties are outlined in Revision Guide for AMDFamily10h Processors:

263 Incompatibility With Some DIMMs Due to DQS Duty Cycle Distortion [p46]
293 Memory Instability After PWROK Assertion [p54]
300 Hardware Memory Clear Is Not Supported After Software DRAM Initialization [p58]
355 DRAM Read Errors May Occur at Memory Speeds Higher than DDR2-800 [p84]
370 DRAM Read Errors May Occur at DDR2-800 Memory Speeds With Higher Read DQS Delays [p89]
417 Processor May Violate Tstab for Registered DDR3-1333 DIMMs [p119] (doesn't apply to many - desktops seldom use registered DIMMs...)
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June 7, 2010 6:07:48 PM

what does that mean tho? i am new at building rigs.. so i dont know they can be used.. =(
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a b } Memory
a c 177 V Motherboard
June 7, 2010 6:23:27 PM

Basically, if something's on the memory compatibilty list, it has at least worked for someone at GIGABYTE, and their support should be able to tell you how to make it work, should you run into difficulties - I can help, but am of 'limited utility', as I just 'don't do' AMDs - I've got my hands full, just keeping up with Intel's difficulties! [:lectrocrew:7]
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a b } Memory
a c 177 V Motherboard
June 7, 2010 10:51:27 PM

RipJaws F3-10666CL7D-4GBRH,
and F3-10666CL8D-4GBRM are listed as compatible with the chipset in G.Skill's documentation;
F3-12800CL7D-4GBRM is not... It lists:

ASRock P55 Deluxe
ASRock P55 Extreme
ASUS Maximus III Formula
ASUS Maximus III Gene
ASUS SABERTOOTH 55i
ASUS P7P55D-E Premium
ASUS P7P55D-E Deluxe
ASUS P7P55D-E EVO
ASUS P7P55D-E Pro
ASUS P7P55D-E
ASUS P7P55D Premium
ASUS P7P55D Deluxe
ASUS P7P55D EVO
ASUS P7P55D Pro
ASUS P7P55D
Biostar TP55
Biostar Tpower i55
EVGA P55 Classified 200
EVGA P55 FTW 200
EVGA P55 FTW
EVGA P55
EVGA P55 Micro
EVGA P55 LE
MSI P55M-GD45
MSI P55-GD65
MSI P55-GD80
Gigabyte GA-P55A UD3
Gigabyte GA-P55A UD3P
Gigabyte GA-P55A UD3R
Gigabyte GA-P55A UD4
Gigabyte GA-P55A UD4P
Gigabyte GA-P55A UD5
Gigabyte GA-P55A UD6
Gigabyte GA-P55 UD3
Gigabyte GA-P55 UD3P
Gigabyte GA-P55 UD3R
Gigabyte GA-P55 UD4
Gigabyte GA-P55 UD4P
Gigabyte GA-P55 UD5
Gigabyte GA-P55 UD6

This is certainly not to say it will not work; but it's not 'supported' - which generally transtates to: "you is on your own!" See Part III - "Evaluation and selection", in the The difference between "Supported Speed", and "Supported Speed"! and The 'Memory Support List', and how to use it: sections...
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