Memory overclocking


log in

Advanced search

Message boards : Number crunching : Memory overclocking

Author Message
Profile trader
Volunteer tester
Send message
Joined: 25 Jun 00
Posts: 126
Credit: 4,968,173
RAC: 0
United States
Message 1346456 - Posted: 14 Mar 2013, 8:24:14 UTC

I have an xmp enabled motherboard and xmp ram

cosair 8gb 1600mhz

right now running cpuz it says my ram is running at nowhere near 1600mhz

i was wondering what kind of boost seti and my system in general would get by taking my ram up to at least the 1600mhz it should be running at
____________
I RTFM and it was WYSIWYG then i found out it was a PEBKAC error

Profile trader
Volunteer tester
Send message
Joined: 25 Jun 00
Posts: 126
Credit: 4,968,173
RAC: 0
United States
Message 1346461 - Posted: 14 Mar 2013, 8:35:48 UTC - in response to Message 1346458.

can you give me a little more info on how to exactly do that or know a link where i can go and read up on it. dont want to turn my freshly built system into a boat anchor.
____________
I RTFM and it was WYSIWYG then i found out it was a PEBKAC error

Profile Tazz
Volunteer tester
Avatar
Send message
Joined: 5 Oct 99
Posts: 137
Credit: 34,342,390
RAC: 0
Canada
Message 1346497 - Posted: 14 Mar 2013, 11:23:40 UTC - in response to Message 1346461.

I had to bump the voltage up a little to get my 1600 MHz RAM to run at 1600, along with setting the speed manually in the BIOS. I think my voltage is at 1.53
____________
</Tazz>

Profile SciManStevProject donor
Volunteer tester
Avatar
Send message
Joined: 20 Jun 99
Posts: 4867
Credit: 82,167,477
RAC: 40,772
United States
Message 1346500 - Posted: 14 Mar 2013, 11:41:29 UTC

I'm running 12 Gig of Corsair DDR3 2000 RAM running at 1925 MHz. I also had to increase the voltage in addition to the speed. The BCLK frequency can be adjusted, which increases the CPU speed as well. The best performance can be achieved with a CPU with an unlocked multiplier. That way you can work the BCLK frequency, and make adjustments with the multiplier to keep the CPU speed where you want it.

Over clocking anything is really a matter of trial and error. The basic rule is increase frequency until there is a problem, then up the voltage a bit until the problem goes away. Then up the frequency a bit further. Your system will pull more power as voltages and frequencies climb, which means more heat. I have two fans directly over my RAM chips, which helps keep the operating temps down. I also have 4, 8 inch fans in my tower, plus water cooling on the CPU and GPU's.

Steve
____________
Warning, addicted to SETI crunching!
Crunching as a member of GPU Users Group.
GPUUG Website

Profile Chris SProject donor
Volunteer tester
Avatar
Send message
Joined: 19 Nov 00
Posts: 31771
Credit: 13,200,287
RAC: 37,017
United Kingdom
Message 1346536 - Posted: 14 Mar 2013, 13:44:50 UTC

We know that overclocking Processors and memory is possible, if you know what you are doing. How much increase in RAC does that give you? 10%, 20%, 30% ??
I am not deriding in any way those that have the expertise and knowledge to do this, Mark and his frozen Penny, will go down in history. But apart from the interest of just doing it, to prove that you can, what benefits do you achieve, when measured against the lifespan of memory and processors pushed beyond their design specifications.

I might be able to drive a Mini up the M1 at 120mph all day long, but I would soon be forking out for a new one! And don't forget, how many of us use OEM kit that has the MB locked :-)

Sirius B
Volunteer tester
Avatar
Send message
Joined: 26 Dec 00
Posts: 11276
Credit: 1,686,661
RAC: 3,687
Israel
Message 1346544 - Posted: 14 Mar 2013, 14:27:31 UTC - in response to Message 1346536.

We know that overclocking Processors and memory is possible, if you know what you are doing. How much increase in RAC does that give you? 10%, 20%, 30% ??
I am not deriding in any way those that have the expertise and knowledge to do this, Mark and his frozen Penny, will go down in history. But apart from the interest of just doing it, to prove that you can, what benefits do you achieve, when measured against the lifespan of memory and processors pushed beyond their design specifications.

I might be able to drive a Mini up the M1 at 120mph all day long, but I would soon be forking out for a new one! And don't forget, how many of us use OEM kit that has the MB locked :-)


Ah, the joys of self build.
____________

Profile HAL9000
Volunteer tester
Avatar
Send message
Joined: 11 Sep 99
Posts: 4244
Credit: 116,005,824
RAC: 140,284
United States
Message 1346560 - Posted: 14 Mar 2013, 15:24:45 UTC

I used the XMP settings on my i7-860 to run the memory at 1600.
Running 4 tasks at a time, with HT enabled, it had a RAC about the same as the 5 other i7-860's I run at work with 8 tasks at once.
Running 8 tasks at a time it had a RAC of about 20% more than the other machines.
____________
SETI@home classic workunits: 93,865 CPU time: 863,447 hours

Join the BP6/VP6 User Group today!

Keith White
Avatar
Send message
Joined: 29 May 99
Posts: 370
Credit: 2,839,328
RAC: 2,232
United States
Message 1346563 - Posted: 14 Mar 2013, 15:32:55 UTC - in response to Message 1346456.

I have an xmp enabled motherboard and xmp ram

cosair 8gb 1600mhz

right now running cpuz it says my ram is running at nowhere near 1600mhz

i was wondering what kind of boost seti and my system in general would get by taking my ram up to at least the 1600mhz it should be running at

First, what exactly does CPUZ says your RAM is running at? You should see the DRAM Frequency (Timings area in the Memory Tab) around 800MHz.

The solution should be as easy as booting up into the computer's BIOS, going to the memory page and selecting the XMP profile for DDR3-1600.
____________
"Life is just nature's way of keeping meat fresh." - The Doctor

Profile trader
Volunteer tester
Send message
Joined: 25 Jun 00
Posts: 126
Credit: 4,968,173
RAC: 0
United States
Message 1346610 - Posted: 14 Mar 2013, 18:10:55 UTC - in response to Message 1346563.

I have an xmp enabled motherboard and xmp ram

cosair 8gb 1600mhz

right now running cpuz it says my ram is running at nowhere near 1600mhz

i was wondering what kind of boost seti and my system in general would get by taking my ram up to at least the 1600mhz it should be running at

First, what exactly does CPUZ says your RAM is running at? You should see the DRAM Frequency (Timings area in the Memory Tab) around 800MHz.

The solution should be as easy as booting up into the computer's BIOS, going to the memory page and selecting the XMP profile for DDR3-1600.



cpuz in one screen says..

dram freq 800.1
fsb:dram 1:6
cl 9
trcd 9
trp 9
tras 24
cr 2t

in another screen it says..

jedec#2 jedec#3 jedec#4 xmp-1600

freq 518mhz 592mhz 666mhz 800mhz
cas 7.0 8.0 9.0 9.0
ras to cas 7 8 9 9
ras precharge 7 8 9 9
tras 19 22 24 24
trc 27 30 34 41
command rate 2t


the memory i have is cosair vengeance xmp memory 2x4 8gb called cosair and read the info on the memory just to make sure i did get a mis ship
____________
I RTFM and it was WYSIWYG then i found out it was a PEBKAC error

Keith White
Avatar
Send message
Joined: 29 May 99
Posts: 370
Credit: 2,839,328
RAC: 2,232
United States
Message 1346690 - Posted: 14 Mar 2013, 21:33:18 UTC - in response to Message 1346610.
Last modified: 14 Mar 2013, 21:37:36 UTC

I have an xmp enabled motherboard and xmp ram

cosair 8gb 1600mhz

right now running cpuz it says my ram is running at nowhere near 1600mhz

i was wondering what kind of boost seti and my system in general would get by taking my ram up to at least the 1600mhz it should be running at

First, what exactly does CPUZ says your RAM is running at? You should see the DRAM Frequency (Timings area in the Memory Tab) around 800MHz.

The solution should be as easy as booting up into the computer's BIOS, going to the memory page and selecting the XMP profile for DDR3-1600.



cpuz in one screen says..

dram freq 800.1
fsb:dram 1:6
cl 9
trcd 9
trp 9
tras 24
cr 2t

in another screen it says..

jedec#2 jedec#3 jedec#4 xmp-1600

freq 518mhz 592mhz 666mhz 800mhz
cas 7.0 8.0 9.0 9.0
ras to cas 7 8 9 9
ras precharge 7 8 9 9
tras 19 22 24 24
trc 27 30 34 41
command rate 2t


the memory i have is cosair vengeance xmp memory 2x4 8gb called cosair and read the info on the memory just to make sure i did get a mis ship


Then everything is OK. DDR stands for double data rate (not Dance Dance Revolution in this case ;)) which means for every clock cycle you get two data fetches so it looks as if it's running at twice the clock speed. So 800 MHz is correct as is all the other settings CPUz is reporting.

The first screen (Memory) shows you what timings it's currently using while the second screen (SPD) shows you the choice of factory settings recorded on the memory stick itself.
____________
"Life is just nature's way of keeping meat fresh." - The Doctor

Profile trader
Volunteer tester
Send message
Joined: 25 Jun 00
Posts: 126
Credit: 4,968,173
RAC: 0
United States
Message 1346704 - Posted: 14 Mar 2013, 22:08:37 UTC - in response to Message 1346690.

ok thank you for the help and information!!
____________
I RTFM and it was WYSIWYG then i found out it was a PEBKAC error

Message boards : Number crunching : Memory overclocking

Copyright © 2014 University of California