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Author Topic: Corsair XMS3 and P67A-C43 (UEFI Settings)  (Read 5099 times)

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altereg0Topic starter

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Corsair XMS3 and P67A-C43 (UEFI Settings)
« on: 27-January-11, 02:02:40 »

Greetings,

I recently bought a P67A-C43 and on it I have Corsair XMS 4GB DDR3-1600 Intel Core i5/i7 Ram Kit (2 x 2GB, PC3-12800, 9-9-9-24, CMX4GXM2A1600C9) modules (2 * 2GB). I never tried O.C'ing since my previous computer was a laptop and I don't want to temper with it that much but I noticed that the motherboard is setting the memory at 1333 MHz by default. I also notice that the 9-9-9-24 values are properly set but the voltage is set to lower than 1.65 V. In addition, there are a handful more parameters which I really don't know how to set. For the time being, I have left it on default values without linking the DRAM timings.

Anyone having the same setup? Or knowing the best configuration for the specific DIMMs?

My setup is:
  • Corsair XMS 4GB DDR3-1600 Intel Core i5/i7 Ram Kit (2 x 2GB, PC3-12800, 9-9-9-24, CMX4GX
  • Sapphire 6850 (PCI-Express, GDDR5, 1GB)
  • Western Digital Caviar Black 500GB HDD 3.5" (32MB Cache, 7200RPM, SATA 6Gb/s)
  • Intel Core i5 2400 (s1155, 3,10GHz, 6MB)
  • MSI P67A-C43 (s1155, P67, DDR3)
  • Chieftec A-135 Series PSU Modular 550W 80+ (APS-550C)

Thanks in advance.
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altereg0Topic starter

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Re: Corsair XMS3 and P67A-C43 (UEFI Settings)
« Reply #1 on: 04-February-11, 03:42:17 »

I read that the new Intel Core i5 2400 and all the similar models offer an embedded memory controller. Am I limited by that?
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uyr

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Re: Corsair XMS3 and P67A-C43 (UEFI Settings)
« Reply #2 on: 04-February-11, 04:33:10 »

i dont have experience of using the non k 'overclocking' chips. i have the same memory and a 2500k, with the c45 motherboard which shares the same bios with the c43. the memory is set to run at 1333 by default on this board, and it is rated to run at 1.5v at 1333, and 1.65v at 1600. to get it to run at 1600, you have to change the dram ratio to 6, you should be okay to change this i assume as ram and cpu frequency overclocking are independant.
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altereg0Topic starter

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Re: Corsair XMS3 and P67A-C43 (UEFI Settings)
« Reply #3 on: 04-February-11, 04:46:46 »

Thank you for your reply. I will be testing this tonight and I will update the thread accordingly :)
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altereg0Topic starter

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Re: Corsair XMS3 and P67A-C43 (UEFI Settings)
« Reply #4 on: 09-February-11, 04:01:06 »

For anyone else having the same questions as I had:

Changing the DRAM ratio value to 6 does make the memories run at 1600 MHz but as Intel states it is unsafe to run the memory at 1.65V which is the voltage for the Corsair XMS3. I did try it out for a few days and it didn't cause any problems. On the other hand there wasn't any noticeable improvement either.

If you are looking to buy memory for a sandy bridge processor make sure the voltage is below 1.65V. Never the less XMS3 is a pretty good bargain for 1333 MHz.

PS: So much trouble having to return my motherboard, along with who knows how many more people around the world.. :<
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Froggy Gremlin

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Re: Corsair XMS3 and P67A-C43 (UEFI Settings)
« Reply #5 on: 09-February-11, 13:28:49 »

Quote
Changing the DRAM ratio value to 6 does make the memories run at 1600 MHz but as Intel states it is unsafe to run the memory at 1.65V which is the voltage for the Corsair XMS3. If you are looking to buy memory for a sandy bridge processor make sure the voltage is below 1.65V. Never the less XMS3 is a pretty good bargain for 1333 MHz.
The 1600 & 1.65v's are the 'rated' speed & voltage of the RAM, meaning they were tested in a lab to reach the advertised 'rated' speed with 1.65v's. RAM manufacturers usually also have a disclaimer stating actual results may vary. The chips are most likely 1333 which should run perfectly when set to 1333, 9 9 9 24, CR 1, 1.50v's.
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Re: Corsair XMS3 and P67A-C43 (UEFI Settings)
« Reply #6 on: 09-February-11, 17:17:22 »

i dont have experience of using the non k 'overclocking' chips. i have the same memory and a 2500k, with the c45 motherboard which shares the same bios with the c43., and it is rated to run at 1.5v the memory is set to run at 1333 by default on this boardat 1333, and 1.65v at 1600. to get it to run at 1600, you have to change the dram ratio to 6, you should be okay to change this i assume as ram and cpu frequency overclocking are independant.

 Wrong, it's the programming of the SPD chip on the RAM and has nothing to do with MB. Furthermore as Ron points out memory controller is in the CPU and has nothing to do with MB other than that timing, voltage, etc is Auto set in BIOS by SPD on RAM or manually changed by user.
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