Okay I have ordered a GA-965P-DS3 rev 3.3. The board uses DDR2 800. If I am understanding this correctly DDR2 800 would require me to overclock the e4300 I am pairing with this unit. The e4300 is 9x200=1.8GHz. Now if you use 1:1 that would make the FSB 400MHz thus running the memory at DDR2 400? Like I said I am confused and if someone could be so kind to explain this alittle better I would greatly appreciate it.
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Im so confused please help me
- Thread starter Scootel2
- Start date
The FSB on that chip is 800MHz
"64 bit Support: Yes
FSB: 800MHz
Hyper-Threading Support: No
L1 Cache: 32KB+32KB
L2 Cache: 2M shared
Manufacturing Tech: 65 nm
Multi-Core: Dual-Core
Processors Type: Desktop
Series: Core 2 Duo
Virtualization Technology Support: No"
Meaning the RAM will still run at the specified DDR2 800. So say the chips FSB was 667 and you had DDR 2 800 RAM then the RAM would be forced to run at 667 I think, if that's wrong feel free to correct me.
You can set the RAM manually, if you want, overclocking it would make the RAM go higher than DDR 2 800 unless you unlinked it. I'm fairly new to overclocking too but no the RAM will run at DDR 2 800, just make sure you set it in the bios.
WintersFury
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That would depend on the divider your set the FSB/Memory to. If you had it set 1:1 then yes the memory would be running at 600mhz. However you could set it to 533 or 667 and run the memory higher than the fsb speed. I'm not sure what the ratios are for the 800 fsb chips are though.
Now I'm the one confused, if the E4300 is on an 800MHz FSB then why wouldn't the RAM just automatically run at DDR 2 800? How would it be DDR 2 600 or whatever if the FSB on that chip is 800MHz, I just don't get that.
WintersFury
Gawd
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- May 19, 2007
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Well he was talking about it being 600mhz when running at 300fsb. If he set the ratio to 1:1 fsb to memory then it would be running at 300mhz.
But he would have to change the memory ratios for that to happen. So technically it should boot up at a 2:1 ratio as the real fsb of the chip is 200 and the memory speed is 400.
EDIT:: Doing some quick calculations, it seems that using the 533 memory divider with a 300mhz fsb will give you DDR2-800 on the memory. And the 667 divider will get you 240fsb at DDR2-800.
The actual FSB at 800MHz is 200MHz, since the bus is quad-pumped. To find out the RAM speed in 1:1 mode, you multiply the basic bus speed by two. Therefore, when the CPU is running on an 800MHz bus, the RAM is running at a speed of 200MHz*2=400MHz.
To run the RAM in 1:1 mode at 800MHz, you need to increase the bus to a speed of 400MHz, which would make the CPU run at a speed of 3.6GHz. However, it almost certainly can't handle that speed with stock cooling(if it can handle those speeds altogether). So, you have a few options. You can either purchase a better cooling system for the CPU so you can overclock it to 3.6GHz and run the RAM at 1:1 with the CPU, you can change the RAM divider to 1:2, making the RAM run at double the bus speed, or you can overclock the CPU to somewhere in between and calculate the divider you will need to use to get the RAM as close as possible to the rated speed. If you want to go deeper into the whole overclocking thing, you can also experiment with running the RAM faster than its rated speeds and with tighter timings than it's rated for.
To run the RAM in 1:1 mode at 800MHz, you need to increase the bus to a speed of 400MHz, which would make the CPU run at a speed of 3.6GHz. However, it almost certainly can't handle that speed with stock cooling(if it can handle those speeds altogether). So, you have a few options. You can either purchase a better cooling system for the CPU so you can overclock it to 3.6GHz and run the RAM at 1:1 with the CPU, you can change the RAM divider to 1:2, making the RAM run at double the bus speed, or you can overclock the CPU to somewhere in between and calculate the divider you will need to use to get the RAM as close as possible to the rated speed. If you want to go deeper into the whole overclocking thing, you can also experiment with running the RAM faster than its rated speeds and with tighter timings than it's rated for.