hyper-x DDR3 1600 seen as 1333

[Thomasj]

My Kingston DDR3 1600 is only seen as 1333 on auto. If I manually change it to 1600 the system will not boot, it wont even turn on the monitor or attempt to do anything until I change it back to 1333 or slower. Timings are all stock as well.

Is there anything I should check before i RMA it?

System specs are

M4A79T Deluxe
Phenom ll x4 955 BE
2GB Kingston DDR3 1600
XFX 4850
Corsair 850W PSU

[Theocnoob]

If your board says it will support 1600 you're likely not setting the voltage or timings correctly. Make sure to match voltage/timings to the sticker on the RAM.

Also make sure when you clock up the RAM that you aren't moving anything else. Im not familiar with PII with its HT interconnect and such..

[Thomasj]

Timings are all set to factory specs. 9-9-9-24

Voltage at 1.9, Specs are 1.7 - 1.9

Speed set at 1600

ALL other settings are stock

CPU at 200x16

CPU Voltage at 1.35

With these settings on it will not do anything, no power to monitor, no beeps, nothing, just fans come on.

If I drop the speed to 1333 it boots and runs stable with no other issues, If I set the speed on "Auto" it runs at 1333 and runs fine. Auto should run it at 1600 but it doesnt

[redduc900]

In addition to manually setting the four primary timings (CAS / tCL-9, tRCD-9, tRP-9 and tRAS-24), also manually set tRC to 33. Leave the rest of the sub-timings on AUTO. You might also want to install the two sticks in the black DIMM slots instead of the orange, and drop the DRAM voltage to 1.7V. Also manually set the CPU/NB Voltage to 1.2. CPU/NB Frequency and HT Link Speed should both be at 2000MHz, DRAM Frequency at 1600MHz, CPU Ratio at 16.00x, etc.

[jgv115]

What's the model?

[Thomasj]

In addition to manually setting the four primary timings (CAS / tCL-9, tRCD-9, tRP-9 and tRAS-24), also manually set tRC to 33. Leave the rest of the sub-timings on AUTO. You might also want to install the two sticks in the black DIMM slots instead of the orange, and drop the DRAM voltage to 1.7V. Also manually set the CPU/NB Voltage to 1.2. CPU/NB Frequency and HT Link Speed should both be at 2000MHz, DRAM Frequency at 1600MHz, CPU Ratio at 16.00x, etc.

Followed those instructions exactly and it did boot finally at 1600 but it is extremely unstable. Constant windows explorer crashes over and over and it blue screens if I just try to click on the start menu or browser. Still rock steady at 1333 though.

[redduc900]

Set tRC to 34 and run Memtest86+. If Memtest fails, bump it up to 35 then run it again... each time keeping track of where it fails, and the number of errors. You may also need to bump the DRAM voltage from 1.7 - 1.75V (in small increments, again running Memtest after each change). Don't even attempt to boot into Windows until Memtest passes all of the tests at least 10 times (10 complete passes).

[fps_matt]

i have a similar problem. when i first built my new pc i had 1066 DDR3 RAM. my MB allows instant OC and changes everything it needs to. when i OC my CPU to 2.5 it changed my RAM to 1172. when i got my new RAM that should be running at 1600 it runs at 1172. i have tried shorting the bios and using the factory settings but nothing ive tried works. any suggestions would be helpful, thanks

[Kevlav]

Does your Motherboard and RAM support XMP by any chance? From what I have read if the board and RAM support XMP the RAM will default to 1333MHz untill you set the profile.



(Edit: Your board only supports upto 1333Mhz so I would think you will have to OC. The four slots can support up to 16GB of DDR3-1,333MHz memory, which is the native speed of the memory controller in the new Phenom II. If you overclock the memory you can run it at a heady 1,600MHz although our testing showed that this doesn't bring much obvious benefit.)