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OCing e4500 and Ram..dividers

post #1 of 14
Thread Starter 
Hey guys..I just got my first build up and running fine, and I'm just starting to overclock it. I have my e4500 running pretty stable(haven't run any tests/did run 3dmark06) at 3Ghz with a voltage of 1.375. My idle temps are around 27-29 and load are 34-37 which i'm pretty sure is alright. I'm just wondering about my ram dividers and if I have my ram underclocked right now. I have a 1:1 divider currently with my cpu @ 11x273, and ram at 273. My ram is DDR2-800, so technically, doesn't this mean that my ram is underclocked from 400? Am I losing performance from this? I think it would be better if I lowered the multiplier and raised the FSB closer to 400 and change the ram to 400 to get 1:1 again. Or would it be better to run a different divider?

I know this is a lot of questions, but I just need some clearing up. Thanks, oh btw here are some cpu-z shots...



Edited by aecker22 - 6/15/08 at 8:17pm
post #2 of 14
Hi,

You are indeed running your RAM under its rated clockspeed. You can rectify it by dropping your multi to 8 and bumping up your FSB to 400 for 3200MHz, which should be possible with your components. Use RAM timings of 5-5-5-15. If it's not working out try a multi of 7 and FSBing up a bit more to 429MHz to get 3000MHz.
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post #3 of 14
Thread Starter 
Alright..I tried changing the multi to 8 and FSB of 400, but couldn't get it to post..I raised voltage to around 1.4, and still nothing. the ram was also at 400 which would be 1:1. Should I try to change multi to 7 and 429, but this wouldn't be 1:1 and wouldn't that mean I would be overclocking ram to around 860? Any suggestions?
post #4 of 14
Ah an E4500 thread, I like these threads for some reason. I just left my E4500 for my E7200 and I had a very good experience with the E4500, being my first Core 2. It was also a golden chip meaning it overclocked to speeds and volts almost no one could mimic. Anyway.. few things, first off go to and download CoreTemp at www.alcpu.com/CoreTemp/ and run it, you will see "VID" and a number displayed beside it, example 1.264v. Post a screenshot of your VID please.

Second, go here and select whatever revision your board is to get the latest bios (F12f) if you are unsure if you are using the latest, http://www.giga-byte.com/Search/Sear...earchType=BIOS

Third, use CPU multi of 11x and set the memory multi to +2.00, this is 1:1 which we want for now. Doing it this way is better because it will rule out any memory related instabilities while we work on clocking the CPU till you are satisified. When you reach a stable CPU speed you are happy with then work on the memory. For now keep the RAM at 5-5-5-15 and set them to their stock volts, they are G.Skill PC-6400 so I will guess about 2.0 - 2.1v, if you know their stock volts already then set them to whatever it is.

Forth, download Prime95 for stress testing. While we are working on the CPU speed first run Small FFTs which stresses the CPU the most, if the test contiunes to run without errors for at least 5 hours you can say you have a stable overclock (on the CPU anyway). Make sure to click advanced then click enable round off checking, this makes Prime95 notify you if it fails the test. Download whatever version that matches your OS, 32 bit or 64 bit.

32bit: ftp://mersenne.org/gimps/p95v256.zip
64bit: ftp://mersenne.org/gimps/p64v256.zip

After I see what your VID is then I can give you a estimated good vcore to start at for 3Ghz (going by your CPU-Z screen lets start at 3Ghz and work our way up).
     
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post #5 of 14
Thread Starter 
Quote:
Originally Posted by GigaByte View Post
Ah an E4500 thread, I like these threads for some reason. I just left my E4500 for my E7200 and I had a very good experience with the E4500, being my first Core 2. It was also a golden chip meaning it overclocked to speeds and volts almost no one could mimic. Anyway.. few things, first off go to and download CoreTemp at www.alcpu.com/CoreTemp/ and run it, you will see "VID" and a number displayed beside it, example 1.264v. Post a screenshot of your VID please.

Second, go here and select whatever revision your board is to get the latest bios (F12f) if you are unsure if you are using the latest, http://www.giga-byte.com/Search/Sear...earchType=BIOS

Third, use CPU multi of 11x and set the memory multi to +2.00, this is 1:1 which we want for now. Doing it this way is better because it will rule out any memory related instabilities while we work on clocking the CPU till you are satisified. When you reach a stable CPU speed you are happy with then work on the memory. For now keep the RAM at 5-5-5-15 and set them to their stock volts, they are G.Skill PC-6400 so I will guess about 2.0 - 2.1v, if you know their stock volts already then set them to whatever it is.

Forth, download Prime95 for stress testing. While we are working on the CPU speed first run Small FFTs which stresses the CPU the most, if the test contiunes to run without errors for at least 5 hours you can say you have a stable overclock (on the CPU anyway). Make sure to click advanced then click enable round off checking, this makes Prime95 notify you if it fails the test. Download whatever version that matches your OS, 32 bit or 64 bit.

32bit: ftp://mersenne.org/gimps/p95v256.zip
64bit: ftp://mersenne.org/gimps/p64v256.zip

After I see what your VID is then I can give you a estimated good vcore to start at for 3Ghz (going by your CPU-Z screen lets start at 3Ghz and work our way up).
Alright..Thanks for the post! Well I got a little further in my overclocking before you came, but I'm currently in the process of updating my bios to f12f.

Ok, well I have successfully booted and ran 3dmark06 with my new oc of 3.2Ghz(1.475000v..HIGH!) at 356x9 with memory at 1:1 at 712mhz. My temps are around 30 idle and 47 load so I'm still alright there. I was unable to find a setting that would boot to 400x8 to keep ram at 1:1 800mhz(my goal) even at voltages near 1.50.

I've been using coretemp all along, my VID is 1.3250, which kinda sucks because I know some people like you had a VID of about 1.2 which are good overclockers.

I also have prime95, but I just don't like waiting so long for stable results(i know, I know)..I was thinking of running it all of tonight though.

Again thanks for the post, and I'm hoping we can push as much out of this as we can..btw if you were curious, I just got 3dmark06 score of 12044!
post #6 of 14
Try 1.40v vcore, +0.1 (G)MCH and +0.1 FSB Volts. Even if you have a high VID 1.475v for 3.2Ghz.. I just don't buy that. Make sure CPU vcore loadline control is set to enabled (if your board has it) and performance mode is set to standard, all secondary timings to auto. If you don't have any options for secondary timings go to main menu in bios and press CTRL+F1.
     
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post #7 of 14
Thread Starter 
Quote:
Originally Posted by GigaByte View Post
Try 1.40v vcore, +0.1 (G)MCH and +0.1 FSB Volts. Even if you have a high VID 1.475v for 3.2Ghz.. I just don't buy that. Make sure CPU vcore loadline control is set to enabled (if your board has it) and performance mode is set to standard, all secondary timings to auto. If you don't have any options for secondary timings go to main menu in bios and press CTRL+F1.
Ok, well i have both the G(MCH) and FSB volts to +.1 already. Im going to check vcore Loadline in the bios. Performance mode was already set to standard, all timings were auto.

One thing I'm curious about now is to see if my mobo is rev2.0 or 2.1. I think it is 2.1 because it lists the new features of the one that newegg does, but on the gigabyte page it doesn't show the current bios that I have(F2) while the rev2.0 does show f2. Is there some way I can tell? In cpu-z it says rev A2..I'm just not sure

EDIT: just went out and dug the box out, it says rev2.1..I'm going to go and update the bios
Edited by aecker22 - 6/15/08 at 10:48pm
post #8 of 14
Look at the bottom left of the board, near the tip where the screw hole is it should be written in white print.
     
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post #9 of 14
Thread Starter 
OK, well I now have the latest bios version. I looked and there is no CPU vcore loadline control in the options. I'm thinking that I just don't have a good overclocking chip. I'm going to keep trying to get 400x8. Is there anything that could be stopping me from POSTing besides cpu? I don't think it is my ram, as everything is set to stock. Maybe it is just a gap? should I try higher?
post #10 of 14
Quote:
Originally Posted by aecker22 View Post
OK, well I now have the latest bios version. I looked and there is no CPU vcore loadline control in the options. I'm thinking that I just don't have a good overclocking chip. I'm going to keep trying to get 400x8. Is there anything that could be stopping me from POSTing besides cpu? I don't think it is my ram, as everything is set to stock. Maybe it is just a gap? should I try higher?
Most of the Intel boards are pretty solid, I've worked with three different P35-DS3 boards and none of them have a FSB hole.

If you're still not getting results with a 1.45 Vcore then you might have a bad chip. :/ bad luck I guess.

I don't really see any harm in trying higher, probably try up to 450MHz or so (I haven't worked with G.Skill RAM before but given that your RAM is pretty decent it should at least do 900MHz DDR?)

Edit: If you're still having a lot of trouble running your RAM at stock, you could perhaps try a higher memory divider and slow your FSB + increase multi.
Edited by Ledward - 6/16/08 at 12:42am
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