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Core 2 Duo - An OC adventure

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Yes, it is :)
Thank you.
 
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Ahhh this thread brings back some great memories!! I lost the screenshots ages ago but luckily most of it is still on the forum :D

All this was done with a Freezer 7 pro, both cooler and cpu were lapped. IIRC this was on a P5Q Deluxe (P45)

4.4GHz entry for 'ultra stable clubhouse'
e8400_02.png

4.6GHz IntelBurnTest (575mhz fsb)
e8400_03.png

5GHz SuperPi 1M
superpi%20ownage.png
 
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Ahhh this thread brings back some great memories!! I lost the screenshots ages ago but luckily most of it is still on the forum :D

All this was done with a Freezer 7 pro, both cooler and cpu were lapped. IIRC this was on a P5Q Deluxe (P45)

4.4GHz entry for 'ultra stable clubhouse'
View attachment 118854

4.6GHz IntelBurnTest (575mhz fsb)
View attachment 118855

5GHz SuperPi 1M
View attachment 118856
Damn haha, 5 Ghz on a C2 that;s impressive. People say Kaby and Coffee are amazing for 5GHz, but back in the day Sandy was doing this too (I did 5.4GHz on my 2600K 4/4 and 5.3 4/8:D) and even before that, you did it on the Core 2 :)

Huh. I'm going to run SuperPi 1M on my 2700X, at its PBO single core of 4.2-4.3 and see where it stacks up to that C2 at 5G. :)

I only started overclocking anything around 2013-2014. I even had an i7 920 that i literally never overclocked o_O (I know, it's bad. 2.6Ghz all day all its life lol, so much wasted potential haha).
 
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i had one of the first core 2 cpus available in the UK.. pre-order from OCUK.. i remember benching it at 4 g way back when..

trog
 
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I tested it.

pi2700x.jpg


Well there you have it folks, a 5GHz Core 2 Duo is slightly faster at SuperPi 1M than a 4.2-4.3 GHz 2700X. o_O I wonder if the calculations are scaling better with raw frequency, as they do not invoke the newer more advanced ISA used by the Zen core. Interesting anyway ^^
 
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zvwunc.png
 
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Wow I did not expect so many to participate, that is awesome! Thank you all for sharing your screenshots and stories.

I´ve done some more quick testing and thought about how I want to set up my charts. I think for the thermals/voltage thingy I´ll start with stock settings, then start at 1.35V and go up in 25mV steps. Like 1.35 - 1.375 - 1.4 - 1.425 - 1.45 etc. and make idle + load measurements on the temp. I´d like to use two cinebench R15 runs back to back for that because they take enough time for the CPU to heat up but are not overkill on the heat output like prime95 in small FFTs would be. I´ve seen prime95 cook my NB more than the CPU on the nForce chipsets...

But if you think that´s not appropriate, let me know what you think. I take suggestions :)
Same goes for the gaming tests and other benchmarks for the 2nd chart, I´m not sure about what to include. I can´t do everything of course, I sadly can´t do this fulltime. I was thinking about Half-Life 2 as a must, maybe some GTAV as a modern title. Benchmark wise I´d like to include one 3DMark Version, Cinebench and SuperPI.

And I went for the next step 1.375V on my stock E8500:


Single core test was plug and play, but getting it stable for a full CPU test was a bit tricky. It first threw BSOD, I took out my pencil and drew some more LLC on the board :p
It then ran the benchmark but stopped with an error at 75%, two times in a row. So I went back to the GTLrefs and played around a bit, because I have no clue what a C2D likes on those but eventually got it do some clean runs.



Temps are starting to rise, 64 °C now. (well knowing intels temp-sensors its more like 64°C-ish)

@AmioriK Yeah I love to do that comparison too, I use the quick and dirty CPU-Z bench to compare mine vs. modern CPUs at stock speed.


Really cool to already be up there competing with modern architecture. My first OC I ever tried was with first gen Ryzen and I was really disappointed. Not just by the concrete frequency wall, but also the whole process was so simple. No real tweaking to do, just raise Vcore and try it. Rinse and repeat.
With 775 stuff you got different chipsets that support DDR2/DDR3, linked vs unlinked FSB, GTLrefs, VTT voltage etc. So much more fun!



I´m still on the 780i chipset currently, because this was on my benchtable for a quick test. I want to see if it really can´t go beyond 500 on the FSB and loaded the poor thing with a full memory config in 4x2GB.
I have some fast DDR2 memory too, but only 2x1GB in 1200 5-5-5. This might work great for the CPU OC but is horrible for benchmarking more modern stuff that expects more RAM.

As soon as I hit the FSB wall on this board I´ll give the 790i Ultra on my Asus Striker II Extreme a shot and if I hit a wall there I´ll try my Gigabyte board and I think by then I´ll rather run out of thermal and voltage headroom.
 
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2 x 1 ram is the preferred amount for 2D benching on that platform.
 
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P45 or X38/48 is the way to go for high FSB, the nForce chipset's are like hitting your head against the wall in comparison. :p
P45 also scales FSB well with low NB temps so it's worth running it chilled if possible.

2 x 1 ram is the preferred amount for 2D benching on that platform.
Yes, a good 2x1GB kit of Micron D9's are all you need. if you need more mem just use a DDR3 board.
 
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You guys are gonna make me breakout the REX again.
http://valid.x86.fr/8ef7p3

Not even close to a record but 600+ FSB isn't bad either and could do more if I really bothered to.
 

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Id love to have a ddr3 board. I have some super talents that would rip with that setup. Also don't have a c2d anymore for my RF. I have a x3360 and its just no fun. About 475fsb is all she's got in my hands. At 4ghz its about as strong as a stock i5 750 iirc.
 
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D

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Wow I did not expect so many to participate, that is awesome! Thank you all for sharing your screenshots and stories.

I´ve done some more quick testing and thought about how I want to set up my charts. I think for the thermals/voltage thingy I´ll start with stock settings, then start at 1.35V and go up in 25mV steps. Like 1.35 - 1.375 - 1.4 - 1.425 - 1.45 etc. and make idle + load measurements on the temp. I´d like to use two cinebench R15 runs back to back for that because they take enough time for the CPU to heat up but are not overkill on the heat output like prime95 in small FFTs would be. I´ve seen prime95 cook my NB more than the CPU on the nForce chipsets...

But if you think that´s not appropriate, let me know what you think. I take suggestions :)
Same goes for the gaming tests and other benchmarks for the 2nd chart, I´m not sure about what to include. I can´t do everything of course, I sadly can´t do this fulltime. I was thinking about Half-Life 2 as a must, maybe some GTAV as a modern title. Benchmark wise I´d like to include one 3DMark Version, Cinebench and SuperPI.

And I went for the next step 1.375V on my stock E8500:


Single core test was plug and play, but getting it stable for a full CPU test was a bit tricky. It first threw BSOD, I took out my pencil and drew some more LLC on the board :p
It then ran the benchmark but stopped with an error at 75%, two times in a row. So I went back to the GTLrefs and played around a bit, because I have no clue what a C2D likes on those but eventually got it do some clean runs.



Temps are starting to rise, 64 °C now. (well knowing intels temp-sensors its more like 64°C-ish)

@AmioriK Yeah I love to do that comparison too, I use the quick and dirty CPU-Z bench to compare mine vs. modern CPUs at stock speed.


Really cool to already be up there competing with modern architecture. My first OC I ever tried was with first gen Ryzen and I was really disappointed. Not just by the concrete frequency wall, but also the whole process was so simple. No real tweaking to do, just raise Vcore and try it. Rinse and repeat.
With 775 stuff you got different chipsets that support DDR2/DDR3, linked vs unlinked FSB, GTLrefs, VTT voltage etc. So much more fun!



I´m still on the 780i chipset currently, because this was on my benchtable for a quick test. I want to see if it really can´t go beyond 500 on the FSB and loaded the poor thing with a full memory config in 4x2GB.
I have some fast DDR2 memory too, but only 2x1GB in 1200 5-5-5. This might work great for the CPU OC but is horrible for benchmarking more modern stuff that expects more RAM.

As soon as I hit the FSB wall on this board I´ll give the 790i Ultra on my Asus Striker II Extreme a shot and if I hit a wall there I´ll try my Gigabyte board and I think by then I´ll rather run out of thermal and voltage headroom.

You should ahve been here at the time, it was a very good time, everyone was posting oc's and trying to beat each other at pii and some other one i cannot remember. Fun times for sure, i remember fondly

I think I win personally :D 107% and 1.8 to 3.9, i desperately wanted 4ghz but was on the edge with 1.57v and temps were getting a tad too high.
 
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The only working C2D I have now is T9900 in Dell laptop. That means Dell's custom BIOS and no overclocking whatsoever. However, it seems that my T9900 is a golden sample which manages to raise multipliers on both cores from 11,5 to 12 - meaning from factory 3,06 GHz to 3,2 GHz.
Core 2 Duo T9900.jpg

T9900_1.jpg

53.JPG


SuperPi 1M calculation.
T9900_2.jpg


I would like to rise it to 3,33 GHz, but BIOS is locked, there is no FSB option and Set FSB doesn't work. Thanks, Dell.
 

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I would like to rise it to 3,33 GHz, but BIOS is locked, there is no FSB option and Set FSB doesn't work. Thanks, Dell.
Is it socketed or BGA? If it's socketed maybe you could do the FSB mod. It's been a long long time but I remember you could jump a couple of pins (BSEL mod I think it was called) to trick it into running at 333mhz, but that would mean 3.8ghz which will prob be too far, and the board might not even boot at 333mhz fsb.

edit - there's a guide HERE, but most of the pics are gone unfortunately.
 
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Back when intel were great.....ah I miss those days.

Best advice I can give is cool the chipset, lots.

I have a few cpuz links on my hwbot via my sig.
 
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Well I have switched the board now. That 780i EVGA board was no longer stable above 450 FSB. Not even with 2x 1GB RAM, and no VTT/SPP/MCP/GTL voltages would get anything above 450 stable. It ran, it booted but either BSOD or app crashes every time in Cinebench and prime95. SuperPi was fine.
I was hoping for just a little more, I have the same reference board from XFX in a system running a Xeon X5470 with 444 FSB and 4x2GB, thought on a dual core with less memory it might do more.

But I´m not giving up on nForce just yet, I have the boards around so might as well take them out to play once every while. (And I saw that der8auer used the 790i for some of his e8500 OC in very old german forum posts :p I have a target now)



I´m giving the Striker II Extreme a go, more Bios settings to play with compared to the 780i and much better chipset cooling. I strapped some fans all around, it runs fine without them on passive cooling (50°C-60°C) but with some fans it drops down to the 30s. Finally a use for my scrap fans :D If the board turns out to clock nice, I´ll hook it up to a water loop.



The Asus V60 just barely fits, there is no visible gap left between the VRM heatsink and the cooler, same on the other side and the side where the fusion block is sitting.
Board is running, made some initial testing with the memory and did not get it to the rated speed, not even with slightly higher voltage. This sadly is to be expected from this board.

Another thing I noticed is, that the Vcore measurement is off by a lot. I set it to 1.300V, booted and saw 1.36V in software. But the temps were staying in the mid 40s during Cinebench which told me 1.36V can´t be right. Took out my DMM and measured on the caps around the socket (I hope that is a legit Vcore reading) and got 1.300V...

I wonder where I will end up with this thing, can it beat the 780i? Or is the C0-Stepping holding me back? When I´m done with the nForce stuff I´ll have a go with P45.
 
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wow, the Striker board!
 
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Cooling Water (1x 240mm, 1x 280mm, 1x 420mm + 2x Mo-Ra 360 external radiator)
Memory 64GB DDR4
Video Card(s) RTX 2080 Super / RTX 3090
Storage Crucial MX500
Display(s) 24", 1440p, freesync, 144hz
Case Open Benchtable (OBT)
Audio Device(s) beyerdynamic MMX 300
Power Supply EVGA Supernova T2 1600W
Mouse OG steelseries Sensei
Keyboard steelseries 6Gv2
Software Windows 10
I've got a couple of MSI retro chipset coolers available if anybody needs one!

Wow those things scream retro pc. I love them!
 
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