Corsair TWINX1024 8000UL and Intel EE 840

[myhken]

Hello.

I'm have ordered a new computer, and have some questions before I get my new computer.
This is my computer:
Asus P5WD2 Premium i955X
Intel Extreme Edition 840 (3,2 dual-core)
Corsair TWINX1024 8000UL DDR2
Gigabyte GeForce 7800GTX 256MB
WD Raptor 74 GB OS disk
and 2,1 TB storagespace

I have some questions about my memory: Corsair TWINX1024 8000UL.
On the Corsair forum I got a tip that I have to set my CPU External Frequency to 250 Mhz, if I want to run my memory at 1000Mhz.
But will my CPU then run at 4000Mhz? (250*16). Can I lower my multiplier to 14, and then run my CPU at 3500 Mhz?

On other forums I see that if I want I can run my memory at tight timings, the standard timings for my memory is 5-5-5-9 at 1000Mhz, do anybody know what the timings is if I run the memory at 800Mhz? One place they told me that you can get a 4.0-4-4-8 at 2.2V if you run at DDR2-800, and 3.0-3-3-8 at 2.2V if you run at DDR2-677 speed.
What will be the best settings for my computer?

And what will be the best timings I can get if I don't want to overclock my system? Intel have a heat problem, and I will only have a Zalman 7700cu cooler for my CPU. Anybody who have the same motherboard, cpu and memory like me? And what timings do you use for maxium speed without overclocking`?

I'm is a newbee at overclocking, and if I can, I will not overclock my system. But I want the best speed possible for my system.

 

[mozzartusm]

First, no you dont have to be at 250 to run 1000mhz, but that depends on the multiplier. Im not sure if you can drop the multiplier to 14 on a dual core but I assume that you can. If you can then you should. At 14 I can get the computer to boot up to 272. If your trying to set a frequency record then running at 1000Mhz or more is fine, but the performance is terrible. More is not always better. If your after performace then you will probably want to run the second or third divider and lower timmings to 4-3-3-8-3 or 3-2-2-6-2 The memory at 1000Mhz boots the best at 5-4-4-9 which you should have known if your would have taken the time to learn more about what you bought.

You didnt mention the Power Supply that your going to use with this system. I will assume that you dont put the PSU very high on your list of most important components. If you dont run the correct PSU in this system it will never run stable at any speeds.

ASUS P5WD2 Premium
Intel 3.73 EE @ 5.6Ghz
XMS2 DDR2 @ 1180Mhz

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[myhken]

Thank you for you reply.
Yes I know that the memory boots best with timings 5-4-4-9 at 1000mhz. I don't want to set a record, but I want the memory to run at the best timings without overclocking the system to much.

I think it will be better to do what you says, set the divider to second or third, and use timings like: 4-3-3-8-3 or 3-2-2-6-2
And then run my CPU at 3,2 Mhz as default.

My Power supply is a Thermaltake Silent Purepower 680W Powersupply, 20/24pin, I think this is a good psu?

I have put every compontent high on my list. I think all of my parts is something of the best.

My only limit is the hight of my case, and therefor I'm using a Cooler Master Wave Master Black Aluminium (Without PSU ).

If you like you can get all of my components:
Asus P5WD2 Premium i955X
Intel Pentium Extreme Edition 840 3.2GHz Socket LGA775, 2MB, EM64T
Corsair TWIN2X 8000UL DDR2, 1024MB CL5 Kit w/two matched CM2X512-8000UL
Gigabyte GeForce 7800 GTX 256 MB PCIe
Cooler Master Wave Master Black Aluminium (Without PSU)
Thermaltake Silent Purepower 680W Powersupply, 20/24pin
Zalman CNPS7700-Cu CPU-Cooler
3 x Papst 80*80*25mm case fans with airflow: 33 m3/h
1 x Western Digital Raptor 74GB SATA 8MB 10000RPM
5 x Samsung SpinPoint P120S 250GB SATA2 8MB 7200RPM NCQ
Chieftec 2 x 5.25" bays for 3 S-ATA HDD, Hot-Swap, full aluminium


I hope this will be a good computer, since I have used around $4.700 total. (the prices in norway is VERY high)
and this is withou monitor, since I allready have a Hansol 19" LCD I'm very happy with.
I also have four Maxtor OneTouch Firewire harddrives @ 950 GB total.


<P ID="edit"><FONT SIZE=-1><EM>Edited by myhken on 08/20/05 02:54 AM.</EM></FONT></P>

 

[mozzartusm]

That PSU is a very good one. Some of the lower wattage TT's dont impress me but the 680W is a good one. In fact, its the same that I have in my system. In fact, we have many of the same components. I have the 3.73 EE CPU.

A few things that you need to do: Go to the website of the manufacture for that CPU heatsink. They will have a compatibilty chart for different MOBOs. Make sure that your MOBO is compatible. This is a very big Heatsink and some in this size range will not clear some of the componnents on this MOBO. Also, if I were you I would find a fan that will fit the Northbrigde. The NB gets really hot on these setups. Im going to check some reviews because I have heard that the Corsair 5400 is producing better bandwidth scores. Either would be great.

Ive had alot of expereince with this MOBO and type setup and will be more than happy to help you once you get your components. You can contact me by PM or find me in the forums. Also, let me know when you get your equipment and I will e-mail you a special BIOS for this Mobo and RAM.

ASUS P5WD2 Premium
Intel 3.73 EE @ 5.6Ghz
XMS2 DDR2 @ 1180Mhz

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[myhken]

Thanks for the help.
If I'm lucky I will have the computer at the end of next week. I'm waiting for the motherboard and memory.

The Asus P5WD2 are not on the Compatible list or the Incompatible, but almost all of the "old" Premium mobo to Asus are on the list. So maybe the list is not updated with the P5WD2 premium yet?

In the two netshops I used they have few NB coolers, but I see a Spire ChipCooler 3A16S2:
Dimensions 40x40x12 mm (L x W x H)
Bearing Sleeve bearing
Rated speed 5500 RPM ± 10%
Noise level 23.0 dBA
Air flow 4.84 CFM at 5500 RPM

Maybe I will buy this, if it will fit after installing the Zalman 7700CU cooler.

My computer store will build the computer for me. This is the first Intel EE 840 computer this store build. Not very many people spends $4.700 on a computer....but I wanted the best Intel dual-core computer.

I will PM you when I get the computer to get the mobo BIOS update

 

[BrentUnitedMem]

for your reference:

do anybody know what the timings is if I run the memory at 800Mhz?

TABLE OF STANDARD LATENCIES
DDR2
DDR2-400 = PC2-3200 (200MHz @ CL=3, tRCD=3, tRP=3)
DDR2-533 = PC2-4200 (266MHz @ CL=4, tRCD=4, tRP=4)
DDR2-667 = PC2-5300 (333MHz @ CL=5, tRCD=5, tRP=5 OR 4-4-4)
DDR2-800 = PC2-6400 (400MHz @ CL=6, tRCD=6, tRP=6, OR 5-5-5)

DDR
*DDR-500 = PC-4000 (250MHz)
DDR-400 = PC-3200 (200MHz @ CL=3, tRCD=3, tRP=3, or 3-4-4)
DDR-333 = PC-2700 (166MHz @ CL=2.5, tRCD=3, tRP=3)
DDR-266 = PC-2100 (200MHz @ CL=2.5, tRCD=3, tRP=3 OR 2-3-3, 2.5-3-3)

SDRAM
PC-100 (100MHz @ CL=2, tRCD=2, tRP=2)
PC-133 (133MHz @ CL=3, tRCD=3, tRP=3 OR 2-2-2)



<font color=blue>******
<font color=green>"My Memory is not working today"
<font color=blue>AIM SoCaliCrowley

 

[myhken]

Hello.

I have got the computer, and have run some test with the memory timings.

With default memory timings on DDR2-800 speed, I got this PCMark05 score: 4832
http://service.futuremark.com/compare?pcm05=84988

I then tried this memory timings on DDR2-667 speed:
3-3-3-8-(5) and got this PcMark05 score: 5749
http://service.futuremark.com/compare?pcm05=85489

I got almost the same result with DDR2-800 speed and timings: 4-4-4-8-(5)

I have used Vcore 2.1 with this timings.

Anybody who have some better timings I can use, without overclocking my CPU?

 

[myhken]

I tried to use FSB 250 and memory speed at 1000Mhz with timins 5-4-4-9, but the CPU temp was around 70-75 idle and up to over 91 celcius on load. So I don't think I want to run my CPU that warm....

Got a new PcMark05 score (6187) with this timings:
DDR2-800 at: 4-3-3-6-(3)

http://service.futuremark.com/compare?pcm05=86492

 

[myhken]

I have a Zalman 7700cu, but maybe Thermalright SI-120 is better?

 

[mozzartusm]

Wusy is correct about running the 14x multiplier. Now all you need to do is get 1000Mhz out of your head. There will be a performance loss at that frequency. Your best Bandwidth will be around DDR2 720 and timings at 3-2-2-6-2 or 4-3-2-6-3

ASUS P5WD2 Premium
Intel 3.73 EE @ 5.6Ghz
XMS2 DDR2 @ 1180Mhz

<A HREF="http://valid.x86-secret.com/records.php?PHPSESSID=792e8f49d5d9b8a4d1ad6f40ca029756" target="_new">#2 CPUZ</A>
SuperPI 25secs