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Memory won't run at 1066 MHz

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October 3, 2008 8:31:02 AM

Hello, I've just bought a new pc, and I believe it's not performing how it should, I've noticed this primarily in games and benchmarks. People with nearly the same configuration as me get more frames , scores, etc.

Here is the specs:


QuadCore Intel Core 2 Quad Q6600, 2400 MHz (9 x 267)
Gigabyte GA-X48-DQ6
4 GB (2gb + 2gb) Mushkin 991599 (996599) PC-8500 DDR1066 MHz
Sapphire ATi Radeon HD 4870X2 2 GB GDDR5

I run Vista Ultimate 64 bit SP1 with all the latest drivers for everything.

A killer configuration it is...but something's just not right with it.
The first thing I noticed is the memory runs at DDR-800. 3DMarkVantage as well as Everest say so, for both modules.
Note, this motherboard comes with a lot of energy saving, cpu downclocking utilities and I've disabled both the
Dynamic Energy Saver in windows as well as ALL the features in the bios (C1E, EIST, etc...) that could be downclocking
the CPU, FSB, memory, what not...That's the first thing I did. But no matter what I do it won't run at 1066, but the bios lists the normal operating frequency of the memory as 1066, next to it is the memory frequency set, which is also 1066, but everything in windows says it's running at 800. The modules are in dual channel.

Also, I found something in CPU-Z which I think could help:







If anyone could tell me where to start that would be great.
Thanks!

More about : memory run 1066 mhz

October 3, 2008 8:51:11 AM

Now I've set the timings to 5-5-5-15 in BIOS and it shows the new timings in CPU-Z but it still lists the memory as PC2-6400 (400 MHz) any ideas?
March 13, 2009 9:09:59 PM

What to say, I've got about the same problem... but with ep43, I've got the 1066, 2x2g, bios said it's 800, windows the same.. still looking for answers just like you.
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March 13, 2009 10:56:11 PM

some bios/motherboards only support upto 800Mhz (400mhz per module). This is the case with by board. so as part of my overclock, I use the lowest cpu multi I can, so I can get the fsb high, and increase the ram speed.

Check ur bios to see the speeds it supports. Some alow you to just enter whatever speed you like for it to run at.

Check the cpu-z 'Memory' tab, and that will show you the exact speed ur ram is running at, along with the timings. For example, my DRAM Frequency is 550
March 13, 2009 11:24:46 PM

In Some boards, like M2N-SLI Deluxe (My board in this case), the native support for 1066 Memory modules are disabled o unspecified.

I test with 2 1066 DDR2 Modules (Corsair Dominator), with a Phenom 9950 CPU, these modules initially works at 800 Mhz, but I move the timings and voltage, checking in the memory manufacturer specifications (in this case 5-5-5-15 and 2.1V using the latest BIOS upgrade.)

I hope that this help You.
April 4, 2009 6:08:34 PM

I have this same Problem in my new build. 1066 Mhz RAM (Corsair XMS2 2x2GB 8500) running at 800Mhz when BIOS is all set to Auto. I manually checked the timings to 5-5-5-18 2.1V as Corsair direct but if anything this slowed the speed down to 400MHz?! There is some talk of increasig the Voltage on the NorthBridge Chip / memory controller but as this is also set to 'Auto' and the instruction is to increase it by 0.1-0.3 Volts I don't know where to start. Not sure what to do to get the full native settings. Any advice?

MoBo = Asus M3N-HT Deluxe mempipe. 1701 Bios + latest Nforce drivers (native RAM support is 1066Mhz according to literature)
CPU = Phenom II x4 940 (which literature leads me to believe supports 1066MHz)
OS = Windows XP Pro 64 Bit (so will recognise all 4 GB)
GPU = 2 x GeForce GTS 250 in SLI

Please help.
a b } Memory
August 5, 2009 3:22:25 PM

quantum112 said:
Now I've set the timings to 5-5-5-15 in BIOS and it shows the new timings in CPU-Z but it still lists the memory as PC2-6400 (400 MHz) any ideas?


Remember to change the ram frequency from 400Mhz to 533Mhz if you want to run @ 1066Mhz.....

The voltage should be raised as well to 2.1v in order to operate at its rated speed......
a c 163 } Memory
August 5, 2009 3:41:27 PM

The voltage maybe isn't the correct, check if you mobo support the RAM to 1066...if don't support....sorry
a c 163 } Memory
August 5, 2009 4:28:55 PM

Ok, so the problem maybe is the configuration, the BIOS or in some mobos, the 1066 speed is only supported with socket AM2+ or intel equivalent....
a b } Memory
August 5, 2009 4:43:36 PM

saint19 said:
Ok, so the problem maybe is the configuration, the BIOS or in some mobos, the 1066 speed is only supported with socket AM2+ or intel equivalent....


??????

Did you read his specs? He is using a core2quad......
a c 163 } Memory
August 5, 2009 4:57:08 PM

Yes, some moths ago I have 1066, and this don't work with a X2 6400+, the speed only go to 1066 when change for the 955....but this is a AMD plataform....in intel i don't know...
!