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Biostar and 4Gb Corsair Memory help


markkk01

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I have a Biostar TPower I45 Motherboard and 2 x Corsair XMS2 TWIN2X2048-6400. I have tried all sorts of things to get the PC going but if I put all 4 chips in the motherboard and run the Memtest it hangs the PC. If I put 2 chips in (checked all 4 sockets for this test) the Memtest works without a problem. Checked both pairs and they both work without issue.

 

Anybody have any ideas why the system won't work with the 4Gb in, I would grateful. :confused:

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Hi, I have checked the chips. They are all same voltage etc, in matched pairs as well O.K.

I have attached BIOS pics to see if someone can see a problem I can't and hopefully try and figure out why I can't get 4Gb working in my system. :confused:

 

As I can't add more that 5 pics will add another mail with the DRAM info, after this one.

1289340787_BIOS1.thumb.jpg.f1bea002fd4e95c4bd014b443f8efc4a.jpg

2129545244_BIOS2.thumb.jpg.13f842e351d0f0e8f4aa2f91b0b4a514.jpg

694826463_BIOS3.thumb.jpg.0a6bdf61adf0c8557b0fbc0e13f04da3.jpg

2073281722_BIOS4.thumb.jpg.de5bedd51b275b2039f76a0a041a39bc.jpg

824050310_BIOS5.thumb.jpg.7542d3955c0549ab81e8a54bc90d9b72.jpg

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The only memory Corsair supports in a four DRAM slot population is their Quad kits. This does not mean two dual kits or even worse two dual kits of different versions will not work together, just that you have no recourse to RMA Corsair if they do not work together. If there are problems with the DRAM modules, they are still supported via lifetime warranty, but that is for physical defects and errors in a two stick kit mode. Matched Quad sets are highly binned modules for a four slot population. The Dual sets are tested as a kit, not a Quad and warranted as a dual kit, not a Quad setup. You need to Memtest them as Kits (2 modules, not as a four DRAM slot population). If they fail as a kit or singly, then you have RMA. Keep in mind that there is no support for mixing and matching different versions of DRAM either since different version are of different fabrications and/or manufacturers. They might work, they might not work, but you have no support if they do not work. Thus you are advised to buy all the DRAM at the same time and in this way be more assured of getting the same versions. If you buy online, be sure to specify same versions of the modules.

 

You are advised to drop the bandwidth to 667Mhz and raise the NB Voltage +.2v.

 

Please research this thread:

 

http://www.houseofhelp.com/v3/showthread.php?t=64360&highlight=Unpredictable+results+QUAD2X4096+Gigabyte+X38-DS5

 

There is a limitation of the On Motherboard (Intel) memory controller or On CPU (AMD) and a population of all four banks at the full speed of a two bank run. This limitation is across the board with both AMD and Intel chipset based boards, DDR, DDR2 and DDR3.

 

Keep in mind that often issues can arise in the longer term even though you have shorter term stability. The issues seldom damage the DRAM unless you raise the DRAM voltage too high. They damage the on CPU (AMD or i7) or on motherboard (Intel) memory controller which has a harder time keeping up with the demands of a four DRAM slot population being run as fast as a two DRAM slot population.

 

I can help you with the BIOS settings if need be.

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With 4 modules I would suggest setting the memory frequency at DDR667 and set the memory Voltage to 2.0 Volts and set the NB/MCH/SPP Voltage to +.2 Volts as well and test the system with http://www.memtest.org. In addition, with some MB's (Mostly ASUS) you have to disable legacy USB in the bios when running any memory test.
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Hi DerekT, thanks for getting back to me so quickly. I thought I should have brought 2 x 2048 chips instead of 4 x 1024. I understand the issue and luckily the chips weren't too costly. I will carry on using 2Gb RAM at the moment and when I can I will upgrade to 4Gb by doing it with 2 x 2048. Thanks for the advice. :sigh!:
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Why not just set the memory speed to 667Mhz and increase the Northbrdge +.2v? The memory is still running as fast as the CPU.

 

Hi DerekT, thanks for getting back to me so quickly. I thought I should have brought 2 x 2048 chips instead of 4 x 1024. I understand the issue and luckily the chips weren't too costly. I will carry on using 2Gb RAM at the moment and when I can I will upgrade to 4Gb by doing it with 2 x 2048. Thanks for the advice. :sigh!:
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