RAM Clock different from BIOS

[BLIzzARD]

hey guys i have a Corsair Vengeance 4 GB 1600 MHz RAM it supports Clock timing 9-9-9-24. BIOS shows correct timing but CPU_Z shows different values can any one explain me that.

also why it shows Max.Bandwidth (667 MHz)

[Bad2049]

It looks to me that he only has 1 stick of ram.

[Sheldon_King]

@BLIzzARD

I can not really suggest anything other than checking to be sure you're running them in XMP mode. CPUz is shpwing you running at 1607.4 MHz @ 4-5-5-15, so you are exceeding the design standard. Enjoy the better latency.

On the max bandwidth being 667, that is not right. What it is showing is 3 JDEC modes (1066MHz, 1184MHz and 1333MHz), as well as one XMP mode (1600MHz). For DDR ram, you have to double the stated speed. 800MHz = 1600MHz due to DDR.

It looks to me that he only has 1 stick of ram.

That has nothing to do with the speed at which it runs, nor the latency. 1600MHz is 1600MHz no matter if it is 1,2,4 or 8+ DIMMs running it.

[BLIzzARD]

@BLIzzARD

I can not really suggest anything other than checking to be sure you're running them in XMP mode. CPUz is shpwing you running at 1607.4 MHz @ 4-5-5-15, so you are exceeding the design standard. Enjoy the better latency.

On the max bandwidth being 667, that is not right. What it is showing is 3 JDEC modes (1066MHz, 1184MHz and 1333MHz), as well as one XMP mode (1600MHz). For DDR ram, you have to double the stated speed. 800MHz = 1600MHz due to DDR.

yes i checked it again and this time i manually set the settings but still no effect.

also i'hv never experience any problem or lagging or anything else but still i wanna know whats happening within my System.

[Sheldon_King]

yes i checked it again and this time i manually set the settings but still no effect.

Okay, so you have confirmed that it is set to 1600MHz 9-9-9-24 in the BIOS? If so, then it is almost certainly running at that speed and the error may be in CPUz. Try checking the RAM speed with a different program, such as the system monitor provided by your motherboard manufacturer.

[Sheldon_King]

Stop this craziness. The RAM is running fine.  It will show up as 800 MHz. You have to multiply that by 2 which gives you your 1600 MHz. If you are concerned about timings then disable XMP and just increase the clock. 

Check your quotes. You said stop the crazyness yet linked a post of mine saying alomst the exact same thing you just said.

[Faa]

The left screenshot is just information of what clocks voltages timings your ram can run and the screenshot on the right is realtime monitoring at what frequency your ram is currently running.

[BLIzzARD]

The left screenshot is just information of what clocks voltages timings your ram can run and the screenshot on the right is realtime monitoring at what frequency your ram is currently running.

yes i know but do you think it would lower life span.

[Altecice]

hello??? not to be rude but is anyone paying any attention to what @Assassin is saying?....

 

 

DDR mean Double Data Rate. Meaning older DR-RAM used to only store information in the falling voltage curve, DDR-RAM meaning it can store when then voltage goes from 0-1  1-0 meaning it can store at each side of the wave. SOO giving you double the data in the same space of time.

 

 

So something that shows as 800mhz * 2 = 1600Mhz effective. 

[BLIzzARD]

hello??? not to be rude but is anyone paying any attention to what @Assassin is saying?....

 

 

DDR mean Double Data Rate. Meaning older DR-RAM used to only store information in the falling voltage curve, DDR-RAM meaning it can store when then voltage goes from 0-1  1-0 meaning it can store at each side of the wave. SOO giving you double the data in the same space of time.

 

 

So something that shows as 800mhz * 2 = 1600Mhz effective. 

Sorry friend i don't want to be rude either but we all know what DDR mean or how it works what we are trying to solve is Clock and Latency time what i set in BIOS is not correctly appearing in CPU_Z but in BIOS everything is fine.

[-rascal-]

Sorry friend i don't want to be rude either but we all know what DDR mean or how it works what we are trying to solve is Clock and Latency time what i set in BIOS is not correctly appearing in CPU_Z but in BIOS everything is fine.

 

What version BIOS are you using for your motherboard? have you tried updating it to the latest one available?

Depending on how long your motherboard has been sitting in storage at the place where your purchased it from, the BIOS could be the very first release version...for all we know.

 

 

The question regarding about Double Data Rate has been solved already, so I'll leave that out.

 

 

The question regarding about your RAM frequency not being exactly at 800MHz (DDR = 1600MHz)...

90% of the clock speeds of your computer utilizes the Core Clock (aka FSB, or Bus Speed) as the reference. The flowing are some of the components of your system at relies on the FSB / Base Clock as a reference:

• CPU frequency (200MHz FSB x 17.5 multiplier = 3.5GHz)
• HT Link (FSB x HT multiplier gives you your HT link speed. The stock is 200MHz x 10)
• CPU-NB (200MHz FSB x 11 = 2200MHz)
• DRAM frequency (200MHz x 4 = 800MHz = 1600MHz DDR)

If you look at the Memory" tab, you see something labelled at "FSB:DRAM" Ratio.

On yours, it shows up at 1:4. If your FSB is 200MHz, your DRAM is 800MHz...which is a 1-to-4 ratio.

 

Precisely 800MHz is obtained when your FSB is EXACTLY 200MHz...but if you look at the "CPU" tab on CPU-Z, it is not exactly on 200MHz. It will vary by a tiny bit - typically a few MHz.

For an example, my Core Clock is running at 200.7MHz. Due to this, my DRAM frequency is showing up at 802.7MHz (1605.4MHz).

Referring to the example above...

200MHz x 4 = 800MHz

200.7MHz x 4 = 802.8MHz

 

In your case, 803.7MHz means your Core Clock (aka FSB) is NOT running exactly at 200MHz, but at ~200.925MHz.

 

This is completely normal behaviour for the CPU.

 

 

Now the incorrect latencies (timings) is something a little more..."odd."

It may be an issue with CPU-Z, or it could be something else.

I see you are using version 1.67.1 of CPU-Z. There is a version 1.68 available; give that a try. It may be an minor bug with CPU-Z itself. CPU-Z is not displaying ALL the information about your RAM. It is missing the other timings such as Command Rate (i.e. 1T or 2T).

 

Also, as I've previously recommended, see if there is a newer BIOS available for your motherboard.

See if there are new chipset drivers available as well.

[BLIzzARD]

thnxx frnd your post was very Helpful i just looked up for BIOS update at Gigabyte website they have a new BETA BIOS update it says it fixes Memory compatibility issue but should i update to BETA BIOS or wait for Full Version to release. 

[Leonard]

hello??? not to be rude but is anyone paying any attention to what @Assassin is saying?....

 

 

DDR mean Double Data Rate. Meaning older DR-RAM used to only store information in the falling voltage curve, DDR-RAM meaning it can store when then voltage goes from 0-1  1-0 meaning it can store at each side of the wave. SOO giving you double the data in the same space of time.

 

 

So something that shows as 800mhz * 2 = 1600Mhz effective. 

If you are talking about the 803 x 2 = 1600 then yes i saw it and i am sure everyone say it too but i am 90% sure it is just a typo unless that is how math is done where he is from.

[Faa]

yes i know but do you think it would lower life span.

What would lower your lifespan? That extra 3MHz? No. Forget updating the bios, don't listen to them. You don't have any issues so