1866mhz ram running at 700mhz

[ajpalmeter]

Here is my information ,

Operating System
Microsoft Windows 7 Ultimate 64-bit SP1
CPU
AMD Phenom II X2 550 40 °C
Callisto 45nm Technology
RAM
16.0GB Dual-Channel DDR3 @ 763MHz (9-10-9-27)
Motherboard
Gigabyte Technology Co., Ltd. GA-MA790GPT-UD3H (Socket M2) 36 °C
Graphics
DellSP2008WFP (1680x1050@59Hz)
1024MB GeForce GTX 560 (ZOTAC International) 37 °C
Hard Drives
298GB Western Digital WDC WD3200AAKS-00L9A0 ATA Device (SATA) 30 °C
466GB Hitachi HDP725050GLA380 ATA Device (SATA) 29 °C
Optical Drives
HL-DT-ST DVDRAM GH22LS50 ATA Device
DTSOFT Virtual CdRom Device



I've changed the timing around on the ram already changing it to the proper size.
This ram is 1866mhz instead of 1600mhz, Was just wondering how i change the settings in bios. I dont have a tweeker to up my ram anymore than 1600mhz . and i see it running at 763 mhz .

Can anyone give me a hand ?

 

[ajpalmeter]

This is the ram ive bought .

http://gyazo.com/ebe0a609b5aa4d8e11f62e8393ff98dc

 

[Sakkura]

That RAM is DDR3-1866 and thus rated to run at 933 MHz. It's false marketing to call it 1866 MHz. Anyway, your motherboard doesn't support RAM running at 1866 MT/s = 933 MHz, its maximum is apparently 1666 MT/s (I think that may be a typo for 1600 MT/s = 800 MHz, and if so you're already pretty close to the limit).

 

[ajpalmeter]

So 1600mt/s is 800mhz ?

Yeah maybe i should of looked up my motherboard before buying ram .
I need to find the best overclock for my system next, So i cant do any better ?

 

[Pinhedd]

What you're seeing there are two different numbers

763Mhz is the IO bus reference clock.

1600Mhz is the IO bus transfer rate. Measuring this in hertz is a misnomer because there's no 1600Mhz oscillator anywhere in the system. The correct way to measure this is in transfers, or MegaTransfers per Second, MT/s.

DDR stands for Double Data Rate, which means that the interface transfers data on both the rising and falling edge of the reference clock; there are two data transfers per pin per clock cycle. DDR3-1600 has a transfer rate of 1600 MT/s (1.6 Gigabits per second per IO pin) and a reference clock of 800Mhz.

Extrapolating this to DDR3-1866 is simple. A transfer rate of 1866 MT/s requires a reference clock of 933Mhz. This is what you need to set your DRAM IO bus reference clock to.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

 

[ajpalmeter]

What you're seeing there are two different numbers

763Mhz is the IO bus reference clock.

1600Mhz is the IO bus transfer rate. Measuring this in hertz is a misnomer because there's no 1600Mhz oscillator anywhere in the system. The correct way to measure this is in transfers, or MegaTransfers per Second, MT/s.

DDR stands for Double Data Rate, which means that the interface transfers data on both the rising and falling edge of the reference clock; there are two data transfers per pin per clock cycle. DDR3-1600 has a transfer rate of 1600 MT/s (1.6 Gigabits per second per IO pin) and a reference clock of 800Mhz.

Extrapolating this to DDR3-1866 is simple. A transfer rate of 1866 MT/s requires a reference clock of 933Mhz. This is what you need to set your DRAM IO bus reference clock to.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Okay i head on another thread that , If im running at 800mhz x2 means im running at 1600mhz ?

I would love to get to 1866 retail ram size, but if i cant this is fine.

 

[Sakkura]

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Good explanations. I'll just add Difficulty 3: The motherboard specification says it supports up to DDR3-1666. So it most likely wouldn't be possible to reach 1866 MT/s anyway.

 

[Pinhedd]

What you're seeing there are two different numbers

763Mhz is the IO bus reference clock.

1600Mhz is the IO bus transfer rate. Measuring this in hertz is a misnomer because there's no 1600Mhz oscillator anywhere in the system. The correct way to measure this is in transfers, or MegaTransfers per Second, MT/s.

DDR stands for Double Data Rate, which means that the interface transfers data on both the rising and falling edge of the reference clock; there are two data transfers per pin per clock cycle. DDR3-1600 has a transfer rate of 1600 MT/s (1.6 Gigabits per second per IO pin) and a reference clock of 800Mhz.

Extrapolating this to DDR3-1866 is simple. A transfer rate of 1866 MT/s requires a reference clock of 933Mhz. This is what you need to set your DRAM IO bus reference clock to.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Okay i head on another thread that , If im running at 800mhz x2 means im running at 1600mhz ?

I would love to get to 1866 retail ram size, but if i cant this is fine.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Good explanations. I'll just add Difficulty 3: The motherboard specification says it supports up to DDR3-1666. So it most likely wouldn't be possible to reach 1866 MT/s anyway.

Good catch, I didn't even look at the motherboard.

 

[ajpalmeter]

What you're seeing there are two different numbers

763Mhz is the IO bus reference clock.

1600Mhz is the IO bus transfer rate. Measuring this in hertz is a misnomer because there's no 1600Mhz oscillator anywhere in the system. The correct way to measure this is in transfers, or MegaTransfers per Second, MT/s.

DDR stands for Double Data Rate, which means that the interface transfers data on both the rising and falling edge of the reference clock; there are two data transfers per pin per clock cycle. DDR3-1600 has a transfer rate of 1600 MT/s (1.6 Gigabits per second per IO pin) and a reference clock of 800Mhz.

Extrapolating this to DDR3-1866 is simple. A transfer rate of 1866 MT/s requires a reference clock of 933Mhz. This is what you need to set your DRAM IO bus reference clock to.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Okay i head on another thread that , If im running at 800mhz x2 means im running at 1600mhz ?

I would love to get to 1866 retail ram size, but if i cant this is fine.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Good explanations. I'll just add Difficulty 3: The motherboard specification says it supports up to DDR3-1666. So it most likely wouldn't be possible to reach 1866 MT/s anyway.

Good catch, I didn't even look at the motherboard.

So im running at 1600mhz for my ram right now ?


Im running at alright speed.

 

[Tradesman1]

Actually that's very good for your CPU, generally you need at least a 965 to reliably run 1600 sticks, so I'd be pleased with 1600, you have a strong 550 (what many will call golden as it can run far better than the norm)

 

[Pinhedd]

What you're seeing there are two different numbers

763Mhz is the IO bus reference clock.

1600Mhz is the IO bus transfer rate. Measuring this in hertz is a misnomer because there's no 1600Mhz oscillator anywhere in the system. The correct way to measure this is in transfers, or MegaTransfers per Second, MT/s.

DDR stands for Double Data Rate, which means that the interface transfers data on both the rising and falling edge of the reference clock; there are two data transfers per pin per clock cycle. DDR3-1600 has a transfer rate of 1600 MT/s (1.6 Gigabits per second per IO pin) and a reference clock of 800Mhz.

Extrapolating this to DDR3-1866 is simple. A transfer rate of 1866 MT/s requires a reference clock of 933Mhz. This is what you need to set your DRAM IO bus reference clock to.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Okay i head on another thread that , If im running at 800mhz x2 means im running at 1600mhz ?

I would love to get to 1866 retail ram size, but if i cant this is fine.

Difficulty1: System firmware is wildly inconsistent in representing DRAM speeds. Some use the reference clock, while others use the transfer rate. Older motherboards use neither and calculate the DRAM reference clock as a function of the system bus clock and a DRAM clock ratio.

Confused? You should be. You'll have to take a look at your motherboard manual to figure out how to generate a DRAM reference clock of 933Mhz, or a transfer rate of 1866.

Difficulty2: Your processor only natively supports up to DDR3-1333. Running DDR3-1866 requires your memory controller to be overclocked into regions in which it hasn't been tested. This may require some tweaking. Most Intel processors can hit that speed without issue, but the weaker memory controller on AMD microprocessors have had issues.

Good explanations. I'll just add Difficulty 3: The motherboard specification says it supports up to DDR3-1666. So it most likely wouldn't be possible to reach 1866 MT/s anyway.

Good catch, I didn't even look at the motherboard.

So im running at 1600mhz for my ram right now ?


Im running at alright speed.

It says 763Mhz in your post above. This is close to the 800Mhz reference clock for DDR3-1600, but not quite bang on. It's probably fine though.