My memory shows up as 12.0 gb (5.93 gb usable) how do I fix this?

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Lee2660

Reputable
May 28, 2015
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I have 3 x 4 gig of ram. Two were stock with pc and the third I added. I get this under installed memory: 12.0 gb (5.93 gb usable). My third stick I installed differs slightly in frequency is there a way to fix this without buying new memory?

Hp Machine;p7-1235
Processor - AMD A8-5500 APU with Radeon HD graphics 3.20
Video is a Nvidia geforce 8800 GT

Memory Slot 1 - empty
Memory Slot 2 - DDR3 Module size 4096, Max Bandwidth - PC3-10700 (667MHz) Kingston Brand
Voltage 1 -4 is at 1.50V
Memory Slot 3 - DDR Module Size 4096, Max Bandwidth - PC3-12800K (800Mhz) Ramaxel
Voltage 1-4 is at 1.35V
Memory Slot 4 - DDR Module Size 4096, Max Bandwidth - PC3-12800K (800Mhz) Ramaxel
Voltage 1-4 is at 1.35V

Running Windows 7 64 bit Home Premium

Any suggestions would be appreciated!

Thanks
Matt
 
Solution
B
Mixing modules with different voltage ratings and different speeds (and probably different timings) in this case here is a bit of a problem.

The system will (probably) be running all of the modules at or around 1.35 V, to avoid over voltage going to the Ramaxel modules. Problem is the Kingston module is being supplied with voltage under its rated voltage of 1.50 V which means it will probably not function properly. This in turn may mean less available memory for the system.

Also, the system may be running the system memory at the lower frequency of the modules (667 MHz).

There seem to be two options available.

1) Increase DRAM voltage manually in BIOS to 1.50 V. DDR3 Memory chips should be capable of handling voltage up to...
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brispuss

Splendid
Dec 27, 2014
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Mixing modules with different voltage ratings and different speeds (and probably different timings) in this case here is a bit of a problem.

The system will (probably) be running all of the modules at or around 1.35 V, to avoid over voltage going to the Ramaxel modules. Problem is the Kingston module is being supplied with voltage under its rated voltage of 1.50 V which means it will probably not function properly. This in turn may mean less available memory for the system.

Also, the system may be running the system memory at the lower frequency of the modules (667 MHz).

There seem to be two options available.

1) Increase DRAM voltage manually in BIOS to 1.50 V. DDR3 Memory chips should be capable of handling voltage up to around 1.70 V. However, it is not known for certain what memory chips are used in the Ramaxel modules and what their maximum voltage rating are. So, increasing voltage to the modules (for the Ramaxel 1.35 V modules in particular) may risk in causing damage to them.

If all is well, then the full 12 GB should become available to the system. But memory frequency will still be at 667 MHz. Overclocking will probably be required by manual adjustments in BIOS in order to get all the modules to run at 800 MHz.

2) Get another module rated at 800 MHz and at 1.35 V to match the existing Ramaxel modules as far as possible. This should maximize available memory (12 GB) and the system memory should run at 800 MHz.
 
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