Only half of my RAM is usable

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The Dude Abides

Commendable
Aug 15, 2016
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1,510
I've had this problem for a very long time and I would like to find the issue to it. So basically in my computer I have four 4GB sticks of RAM all the same type, however my computer only put half of that memory to use in the reserve. I tested to make sure it wasn't the RAM itself by taking each one out and testing them separately as well as each slot I could put them in. They all seem to work fine and the computer acknowledges that the RAM is indeed there. I've also tried to changing the maximum memory to both checked and unchecked which doesn't seem to help. Anyone know how to fix this?

Specs:
Processor - AMD FX-8350 4.0GHz 8-Core Processor

Motherboard - Gigabyte GA-970A-UD3P ATX AM3+ Motherboard

RAM - G.Skill Ripjaws Series 8GB (4 x 4GB) DDR3-1600 Memory

Extra HardDrive - Western Digital BLACK SERIES 1TB 3.5" 7200RPM Internal Hard Drive

GPU - MSI GeForce GTX 970 4GB Twin Frozr V Video Card

Case - Enermax Thorex ATX Mid Tower Case

PSU - Raidmax Vampire 800W 80+ Gold Certified Semi-Modular ATX Power Supply

OS: Windows 7 Ultimate
 
Solution
MeanMachine41


The question asked is not answered.
If you added 8Gb kit of what you linked and then added another kit the same then there may be slight variations in CAS Latency and Timings.
Memory vendors bin memory kits at their rated density. If an end-user combines memory kits to make up a higher density, the memory timings that...
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T

The Dude Abides

Commendable
Aug 15, 2016
7
0
1,510


Based on what I believe to be the kit numbers they all have it as F3-12800CL9D-4GBRL
Here's a link to the RAM itself.
 
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MeanMachine41

MeanMachine41

Judicious
May 8, 2014
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33,390


The question asked is not answered.
If you added 8Gb kit of what you linked and then added another kit the same then there may be slight variations in CAS Latency and Timings.
Memory vendors bin memory kits at their rated density. If an end-user combines memory kits to make up a higher density, the memory timings that each kit is programmed with are no longer valid or guaranteed to work. In fact, memory vendors themselves advise users not to combine kits.

You can make them work if you understand your Bios and how to properly program Bios. It can be frustrating with no guarantee.
 
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Solution
Wolfshadw

Wolfshadw

Titan
Moderator
Aug 3, 2006
28,231
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133,290


Again, please verify what you're supposed to have. Do you think you have 8GB of RAM installed or 16GB (4x4GB)?

You stated in your original post you had "four 4GB sticks of RAM", If the kit number you provided is the correct one, those are 4GB (2x2GB) kits and not 8GB (2x4GB) kits.

-Wolf sends
 
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