Used to have a single channel of RAM at 400Mhz 500MB, now replaced with dual channel each 1GB but 333MHz. The PC only detects 500MB in each channel, but has gone into dual channel mode. Is there a bios setting that I need to change to get the rest of the RAM recognised? FSB is 166MHz to get the CPU speed to be detected correctly. Ta.

Good Day.
Your motherboard can accommodate up to 4GB of memory. That means you can have 4pcs of 1GB DDR SDRAM 400mhz or 333mhz memory modules to maximize your memory. Just be sure to have the same speed (400mhz or 333mhz).

Just let me know if you need some more help.
Good luck,

Tedmac

You will need to manually set the ram speed, in the BIOS to 333MHz as the board does not support 400MHz in dual channel mode. Also, the slot lay out is every other slot, so you need to put one brand of RAM in slots one and three, then the other brand in slots 2 and 4. The 3GB maybe incomparability in using two different brands. I had this exact board and it was very finicky with RAM. I know DDR is expensive, so you may be stuck with 3GB, but I'd expect some errors. You see, each brand may have different timings the old BIOS cannot pair up between the brands, causing a conflict and causing you to lose out on 1GB of RAM.

Check the manual pages 2-7 and 2-8 for memory configurations.you can get the manual from here: https://us.msi.com/Motherboard/support/K8N_Neo4_Platinum_PCB_1.0#down-manual

Yes, you can add it. The faster 1 GB will be downclocked to the speed of the slower 256MB.
 But it would be better for performance to remove the 256 MB one completely.

u can use the 1gb ddr1 ram,if the sound is coming then may there is two problem

1.may be the ram is damage

2.your motherboard is not supporting 333mhz bus support

try to find 400mhz ram instead of 333mhz

Your Intel D845GVSR has,

1. Two ram slots.

2.Maximum Amount of ram is 1GB for EACH ram slot.

3.Maximum TOTAL Amount is 2GB, (1GB in each ram slot)

4.Uses DDR Sdram at 400MHz, (PC3200), OR
DDR Sdram at 533MHz, (PC4200)

This is an example of DDR Sdram at 400MHz, (PC3200),

http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=1354&name=PC3200-DDR-Dual-Channel-Memory&Nav=|c:1352|&Sort=0&Recs=10

(Not advertising for this website. There are many places to buy ram memory)
512MB + 512MB = 1024MB, or also stated as 1GB
1024MB = 1GB

if u have 4 ram slots check they are in the right slot'my old dell ram slots were 1.3.2.4.no you need ddr2 ram .yours are probably standard ram or u dont have daul channel ram slots.

Each memory slot can hold DDR PC2700,DDR PC3200 with a maximum of 1GB per slot

So, yes, you can put two 400MHz modules in the slots.

Since Intel says that this board will support DDR with 200/266/333 MHz speeds only.There should not be problem with your board more so that it works fine.

Yes your mainboard can support 1GB ram400mhz without any issues.check your board manual However if any issue arise you can upgrade the bios

Hope you find this information helpful.

Hi reisrui, yes it is odd. (It's not the first time I have seen this.)
According to you're manual on page 6, under Specifications. The manual say's you can run up to a Max speed of PC3200 400MHz, 1GB in slot one. In slot 2 you can run a Max of 1GB of PC2700 333MHz in slot 2. Every motherboard I have come across that can run two different speeds of memory. The system will reduce the Max speed to the lower MHz memory speed. If you currently are using 512MB PC3200 400MHz in slot 1 & add 1GB of PC3200 400MHz into slot 2 for a total of 1.5GB of memory. The motherboard will ruduce the total memory over all speed to PC2700 333MHz. Motherboards alway run at the lower memory speed if two different speeds are presant.
I can’t be 100% sure of the 1GB of PC3200 400MHz into slot 2, will run at all! Or if it will be reduce down to 333MHz. I am sure you can run 2GB of PC2700 333MHz, 1GB of memory per slot in you're board for a total of 2GB.

If I can help you further, feel free to post.
Suggestions & comments welcomed.
Mike