Sylvainp Posted October 29, 2007 Share Posted October 29, 2007 I recently build a new PC with a Q6600 (G0) and the Asus Maximus Formula with Corsair Dominator 8500 v2.1 (new IC chip not Micron) Presently i am running my PC at stock speed CPU 9 x 266 and vcore at 1.25v Memory at DDR1066 CAs: 5-5-5-15 Now that i have test my system for about a week and stable like a rock ! Idle temp is between 34 to 38 degree and at full load around 50 max. Room temperature 23.5 and in case temperature 30 to 31 degree. Now I want to OC this PC and I was wondering what would be the best OC settings for Air cooled. With the Dominator 8500 they run at DDR1066 (533) at 5-5-5-15 and 2.1v How tight I can set the timings on these memory ? Lets say 4-4-4-12 at what DDR speed I can go with them ? When overclocking is it better to always keep a ratio of 1:1 with FSB and memory speed or it is better to push both FSB and memory speed to their max ? What are the best and safe voltage range to use for a Q6600 ? Here what I was planning to use for OC settings: CPU 6x533 = 3198 CPU vcore: maybe 1.28v ? Memory DRAM voltage 2.1v DDR1066 at 5-5-5-15 So the ratio will be 1:1 Can I run tighter timings for the memory at 1066 or I need to lower the DDR For the memory is it better to put higher DDR FREQUENCY with higher timings (5-5-5-15) or it is better to run with lower DDR FREQUENCY with lower timing (4-4-4-12)? Thanks Link to comment Share on other sites More sharing options...
DerekT Posted October 29, 2007 Share Posted October 29, 2007 Now I want to OC this PC and I was wondering what would be the best OC settings for Air cooled. What Air cooling are you using? What are the best and safe voltage range to use for a Q6600 ? It depends somewhat on the cooling and the CPU. I have finished an Q6600 (G0) with an Thermalright Xtreme and two 120mm fans. It will take 3.4Ghz with 1.4(BIOS) and 1.38(Windows). It will do 3.6Ghz but the temps move up into the 80's and that is not a good place to be. A full load with 70C after 8 hours of quad prime is about the limit to my opinion. Here what I was planning to use for OC settings: CPU 6x533 = 3198 CPU vcore: maybe 1.28v ? Memory DRAM voltage 2.1v DDR1066 at 5-5-5-15 So the ratio will be 1:1 Your Vcore might well be a bit low for that. Download the new version of Prime95 (for quad cores): http://www.softpedia.com/progDownload/Prime95-Download-76537.html Can I run tighter timings for the memory at 1066 or I need to lower the DDR? For the memory is it better to put higher DDR FREQUENCY with higher timings (5-5-5-15) or it is better to run with lower DDR FREQUENCY with lower timing (4-4-4-12)? Check Corsair's very own bachus_anonym from Corsair Engineering's results on this DRAM: http://www.asktheramguy.com/forums/showthread.php?t=62989 Link to comment Share on other sites More sharing options...
Sylvainp Posted October 29, 2007 Author Share Posted October 29, 2007 I am using a Thermalright Ultra 120 Extreme with a Scythe 21F fan. I have an extra Scythe 21F fan but I don't think it is worth to put it. Will probably be to noisy.... I have only one and I can hear it. Link to comment Share on other sites More sharing options...
DerekT Posted October 30, 2007 Share Posted October 30, 2007 You will be fine with one fan and 3.2Ghz. Read the link and you will have a good approximation of the speed and timings to aim for. Use memtest's memory bandwidth to gain a good approximation of your uncached memory speed. This is far better than cached benchmarks. Good luck... Link to comment Share on other sites More sharing options...
Sylvainp Posted October 30, 2007 Author Share Posted October 30, 2007 Yes I already have use Memtest 86+ v1.70 but I have a X38 chipsets so they are information that is not displayed on the screen, like CAS and other stuff. The memory speed if I remember right was around 4400 MB/s or maybe a bit more. I have check the link for the test but I don't see any image. I have blank white square with a red X. So I only see the text but no picture of the screenshot. So far from what I can read it is possible to run them at DDR900 at CAS 4-4-4-12. So with this I can probably set the CPU to 7 x 450 and see if it is available when I will set the FSB TRAP Otherwise I can still go with DDR1066 cas 5-5-5-15 and the CPU at 6 x 533 With this settings I think that I will need to put a FSB TRAP to 533. Need to check this after work tonight.... Thanks Link to comment Share on other sites More sharing options...
Sylvainp Posted October 31, 2007 Author Share Posted October 31, 2007 Well I finally play a bit on OC my PC.... on air cooled with a Ultra 120 Extreme I have tried to OC the memory at DDR1111 with CAS 5-5-5-15 @ 2.1V Memtest error on TEST #5 This OC didn't post (boot) CPU @ 6 x 533 FSB with 1.35v (maybe I need more voltage) Memory @ DDR1066 CAS 5-5-5-15 @ 2.1v This OC work perfectly CPU @ 8 x 400 FSB with CPU voltage : auto Memory @ DDR1066 CAS 5-5-5-15 @ 2.1v Memtest no error for 2 pass Prime95 v 25.5 no error for an hour at Stress test small FFT CPU temp Max: 62 62 60 60 using Coretemp and Everest 3DMark06 score: 13274 (one card, No SLI) I also think that at DDR1066 with CAS 5-5-5-15 is probably the max and the most reliable timing to get reliable results. I have tried at DDR1111 CAS 5-5-5-15 with 2.1v and they didn't pass Memtest 86+ v1.70 So why I can't make it work with 6 x 533 FSB = 3198 and with 8 x 400 FSB = 3200 it work ? I would really like to make it work at 6 x 533 because I will have a ratio of 1:1 which I think it is better than using other ratio. Maybe i'm missing something here..... Thanks Link to comment Share on other sites More sharing options...
DerekT Posted October 31, 2007 Share Posted October 31, 2007 So why I can't make it work with 6 x 533 FSB = 3198 and with 8 x 400 FSB = 3200 it work ? I would really like to make it work at 6 x 533 because I will have a ratio of 1:1 which I think it is better than using other ratio. Maybe i'm missing something here. Yes, the processor is basically running at 3.2Ghz on both settings. However, the FSB of 400 vs 533 is pretty heavy duty. Have you changed your vPLL? Set it to 2.3v. Set your CPU to 1.4v. Active cooling on the DRAM would be a good thing as well. Keep in mind that 533MHz is getting very close to the max FSB of this board. You are not able to find out if 533 X 6 is stable because you can not isolate the DRAM from the possible FSB issue? Edit: Just noted you are on Quad Core. I have not heard of anyone making that kind of FSB on a Quad Core. No matter what board. Only Dual Cores and not many of them. Have you researched this? If not, I can find you some good research. Link to comment Share on other sites More sharing options...
Sylvainp Posted November 1, 2007 Author Share Posted November 1, 2007 I already using a Corsair Airflow on the memory.... but the memory are not overclocked their are at their DDR1066 speed with CAS 5-5-5-15 But I have to set the fan speed ratio for the Corsair Airflow at 70% (3800 RPM) because at 100% their is alot of vibration made from the fan. Maybe I got a bad fan unit ? I was able to get stable at 8 x 400 with a Vcore of 1.35v Maybe I will run it at 9 x 333 FSB for the moment and keep the memory at DDR1066 with CAS 5-5-5-15 unless I found something better... Of course i would also like to get some links to good info for overclocking. Thanks Link to comment Share on other sites More sharing options...
DerekT Posted November 1, 2007 Share Posted November 1, 2007 8 X 400 is pretty good. The last Q6600 (G0) I worked on made 380 X 9 quite easy with the DRAM set to 1140 with 2.25V (80mm Fan on the DRAM) @ 5-5-5-12. 1.42V BIOS and 1.384 in Windows. Temps with Ultra Xtreme 120 (2 Fans) 34/36/40/43 on idle and load 63/65/69/71 9 X 400 gave me greater than 80C load. Yes, the little fans are noisy on high. All small fans will be. Link to comment Share on other sites More sharing options...
Sylvainp Posted November 1, 2007 Author Share Posted November 1, 2007 hmmmm.. Just for the fun of it I will also try the 9 x 400 to see if I can reach it and also to see my Coretemp.... Whats funny is that on Anandtech they get idle around 26 degree and load temp around 40 with a Ultra 120 Extreme using Coretemp !!! The CPU is an X6800 so it is a dual core. What could be normal idle temp I should get with my Q6600 at notmal stock speed at idle ? I get around 37 to 35 Core 0 and 1 always the hotter cores. Now I have only one Scythe 21F fan (1600 RPM) but I have an extra 21F with the heatsing clip. Just wonder how to put the clip on the heatsink to pus an extra fan on it ? In my cas is it worth to put a 2nd on the Ultra 120 Extreme ? If so where I oput the clips because their is only one hole to put the clips in on the heatsink ? Thanks Link to comment Share on other sites More sharing options...
DerekT Posted November 1, 2007 Share Posted November 1, 2007 Whats funny is that on Anandtech they get idle around 26 degree and load temp around 40 with a Ultra 120 Extreme using Coretemp !!! The CPU is an X6800 so it is a dual core. Yes, I have an E6850 on one and it gets 29C with ambients of 22C. Quads are different beasties. Not only with the core but all that extra cache needs constant electrical refreshing. What could be normal idle temp I should get with my Q6600 at notmal stock speed at idle ? I get around 37 to 35 Core 0 and 1 always the hotter cores. Draw four square boxes. When a task is being performed, it is spread across the cores with Core 0 getting a bit more than core 1, the same with Core 2 and Core 3. So your numbers are normal and a decent idle temp. Now I have only one Scythe 21F fan (1600 RPM) but I have an extra 21F with the heatsing clip. Just wonder how to put the clip on the heatsink to pus an extra fan on it ? You can buy extra retention clips. http://www.thermalright.com/a_page/main_product_accessories.htm The reason I added the extra fan is because all my fans have 3-way switches and I run them all on low. Two fans on low is more quiet and pulls more air than one on high. And when I want to run a Prime95 or hard working program , I can switch them both on high. In my case is it worth to put a 2nd on the Ultra 120 Extreme ? If so where I oput the clips because their is only one hole to put the clips in on the heatsink ? It's up to you. If you want a quieter machine, you may wish to do this. you put the retention clips on the hole below the one you are already using. They are all down each doubled fin. You NEED To PrimeTest now because you had a freeze. You don't seem to want to prime test. I'm not sure why, but it is a advised. What is your 1 hour prime coretemps? Link to comment Share on other sites More sharing options...
Sylvainp Posted November 1, 2007 Author Share Posted November 1, 2007 You NEED To PrimeTest now because you had a freeze. You don't seem to want to prime test. I'm not sure why, but it is a advised. What is your 1 hour prime coretemps? Yes I primetest.... With the Q6600 at stock I get around 48, 49 degree With 9 x333 I get around 55 degree With 8 x 400 I get around 61, 62 but not shure because I didn' t write it down but was around there and definitly not over 64 degree. Oh I forgot also to tell that at idle my CPU clock ratio is slowing down to 6x because of the C1E features enable. (save energy and less heat) And for the Scythe 21F I put on the heatsink it's RPM is 1600 but actually turn around 1575 RPM. In the BIOS I have tried to change the speed of this fan and enable Q-Fan control and set it to silent but the FAN RPM always turn at full speed.... Maybe we need a PWM fan to enable this features for the CPU fan ? All my other fan (all Scythe) I can change the speed by selecting slower Ratio % Link to comment Share on other sites More sharing options...
DerekT Posted November 1, 2007 Share Posted November 1, 2007 Good stuff. Now be sure to run Prime if you move up to 3.4 - 3.6Ghz. If you move to 3.6GHz. Keep an eye on your Coretemp program while you Prime. If you see the VID drop and the temperature drop, that means your CPU is throttling back its power and you are running too warm. That happens around 78 - 80C depending on the voltage. If the voltage is quite high, it can begin to throttle at ~75C or so. If this happens, then you might as well drop down to 3.4Ghz and retest there. Maybe we need a PWM fan to enable this features for the CPU fan ? All my other fan (all Scythe) I can change the speed by selecting slower Ratio % Correct. You can't do the BIOS control of these fans unless they are four pin fans. Three pins means you need an alternative method to control the fan. http://resources.vr-zone.com/yantronic/GA-8I945GMH-RH/pwmfan.jpg It must fit the header. Link to comment Share on other sites More sharing options...
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