A 945 Chipset would be a better option officially for Dual Core CPU'S.
Vlad94 wrote on 2024-03-12, 07:31:Ohh thanks for that! I had same problem with HD5850 on that board (after all i won't use that GPU but Crossfired HD4850's :D), b […]
Roman555 wrote on 2024-03-11, 15:49:Vlad94 wrote on 2024-01-08, 01:30:Now time for second topic, Conroe and 925X chipset.
I used Core 2 Extreme X6800 (only C2D with unlocked multiplier) and ASRock 775XFire-VSTA board.
...Vlad, I've made a topic about ASRock 775XFire-VSTA and Radeon HD incompatibility. Maybe it will be useful for you too .
Have you managed to make Pentium D 9xx 65nm (Presler) work on the board? It's really strange that the mainboard supports Cedar Mill which is a half of Presler but not Presler itself.Ohh thanks for that! I had same problem with HD5850 on that board (after all i won't use that GPU but Crossfired HD4850's 😁), but BIOS may be still useful for me.
I mean, Pentium D requires SMP, which i915/925 does not have, so Pentium D won't be possible, it is possible to force PD to start in P4 board, but 1 core will be detected anyway.
Core 2 Duo is different story, SMP is not required so it can work with 915/925, and BIOS from that board have code for Conroe (or it seems to have, maybe it starts it by luck like Asus p5gd1-vm?)
Can you check if that BIOS have proper Core 2 code? It works for me with X6800 flawlessly, I just needed to add uCodes 😜
Can you show the pinmod to force pentium d to start in an pentium 4 board?
Vlad94 wrote on 2024-01-03, 01:10:I heard that too, but if I remember correctly, mainboard manufacturers knew about i915 dual-core CPU support, just Intel didn't […]
VivienM wrote on 2024-01-03, 00:01:Back in the day, the word on the street was that the i915/i925 had deliberately removed dual-processor/core capability because Intel was upset that some rogue motherboard makers were making dual-processor systems with the 865/875 instead of buying the more expensive chipset with the more expensive official dual processor ability. Not sure what CPUs those boards were running, either - was there still a way to use ordinary consumer CPUs in a multiprocessor rig (as was common in the second half of the 1990s... and continued to be the case in Mac PPC land at that time), or were they using Xeons?
I heard that too, but if I remember correctly, mainboard manufacturers knew about i915 dual-core CPU support, just Intel didn't let them made Pentium D board with that chipset, and in Core 2 times, i915 was dead already so no one bothered.
(or actually ASRock wanted to do i925x Core 2 board in 2006, it supports Cedar Mills officially, but bios is fully compatible with Conroe (still needs pin-modded CPU), even speedstep works, board is 775XFire-VSTA, but I don't want to spoiler too much for now 😜)VivienM wrote on 2024-01-03, 00:01:And then, of course, not that long after, they released dual-core chips originally with the 945 chipset and had to put that feature set back in.
Actually 955x is first chipset for dual-core CPUs officially, one month older 😁
Standard Def Steve wrote on 2024-01-03, 00:37:Hey, that's pretty cool. I wish that my 925XE based Dell would have allowed a like-socketed Core 2 Duo back in the day.
This is like CoffeeTime, except with Core 2. It's WolfTime, woof!
I wish Core 2 Duo for my Optiplex GX280 too, but BIOS is problem sadly, without reverse engineering it adding code for Core 2 initialization would be impossible, thanks Intel.
Heh I remember reading about CoffeeTime, it was impressive research too 😀
Can't you try to flash a GX620 bios on the GX280 to make c2d work? they seem quite simmilar actually.
lixkote wrote on 2025-02-04, 12:50:Vlad94 wrote on 2024-01-03, 01:10:I heard that too, but if I remember correctly, mainboard manufacturers knew about i915 dual-core CPU support, just Intel didn't […]
VivienM wrote on 2024-01-03, 00:01:Back in the day, the word on the street was that the i915/i925 had deliberately removed dual-processor/core capability because Intel was upset that some rogue motherboard makers were making dual-processor systems with the 865/875 instead of buying the more expensive chipset with the more expensive official dual processor ability. Not sure what CPUs those boards were running, either - was there still a way to use ordinary consumer CPUs in a multiprocessor rig (as was common in the second half of the 1990s... and continued to be the case in Mac PPC land at that time), or were they using Xeons?
I heard that too, but if I remember correctly, mainboard manufacturers knew about i915 dual-core CPU support, just Intel didn't let them made Pentium D board with that chipset, and in Core 2 times, i915 was dead already so no one bothered.
(or actually ASRock wanted to do i925x Core 2 board in 2006, it supports Cedar Mills officially, but bios is fully compatible with Conroe (still needs pin-modded CPU), even speedstep works, board is 775XFire-VSTA, but I don't want to spoiler too much for now 😜)VivienM wrote on 2024-01-03, 00:01:And then, of course, not that long after, they released dual-core chips originally with the 945 chipset and had to put that feature set back in.
Actually 955x is first chipset for dual-core CPUs officially, one month older 😁
Standard Def Steve wrote on 2024-01-03, 00:37:Hey, that's pretty cool. I wish that my 925XE based Dell would have allowed a like-socketed Core 2 Duo back in the day.
This is like CoffeeTime, except with Core 2. It's WolfTime, woof!
I wish Core 2 Duo for my Optiplex GX280 too, but BIOS is problem sadly, without reverse engineering it adding code for Core 2 initialization would be impossible, thanks Intel.
Heh I remember reading about CoffeeTime, it was impressive research too 😀
Can't you try to flash a GX620 bios on the GX280 to make c2d work? they seem quite simmilar actually.
The GX620 and GX280 use two different chipsets entirely, the GX620 uses the 945 chipset and the GX280 uses the 915 chipset. Also, the GX620 never supported Core 2 processors. I used to have one of those at some point and I remember the fastest CPUs it could take were the 900 series Pentium D's.
Curious if these bios mods can be done to 775 VIA chipset based mobos as I have 2 I'd love to increase cpu support on.
Need Late P4 and Early C2D LGA 775 Bios and CPU Modding Help
Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
greasemonkey90s wrote on 2025-04-07, 08:08:Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
It cant , just not enough datalines\adress space for Core2 cpus , i played around MSI P4N Diamond and wrote mod for it , Cedar Mill can be runned only w pinmod , and Presler CPU can be runned w pinmod + bios mod that removes one of checks that triggers unavalible register (MSR 2CH). Pinmod for both - insulated J2 + AL3 , modbios w removed MSR call attached. Board also can run 771 Xeons 50xx series w sticker + pinmod , that allows you get 2 core 4 threads at 4ghz on air on this board , w performance comparable w low-clock Conroe E6xxx. https://drive.google.com/file/d/1HCtbhrdY5TLt … iew?usp=sharing , https://hwbot.org/benchmarks/cpu_frequency/su … issions/5568402
R-998 wrote on 2025-08-04, 07:58:greasemonkey90s wrote on 2025-04-07, 08:08:Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
It cant , just not enough datalines\adress space for Core2 cpus , i played around MSI P4N Diamond and wrote mod for it , Cedar Mill can be runned only w pinmod , and Presler CPU can be runned w pinmod + bios mod that removes one of checks that triggers unavalible register (MSR 2CH). Pinmod for both - insulated J2 + AL3 , modbios w removed MSR call attached. Board also can run 771 Xeons 50xx series w sticker + pinmod , that allows you get 2 core 4 threads at 4ghz on air on this board , w performance comparable w low-clock Conroe E6xxx. https://drive.google.com/file/d/1HCtbhrdY5TLt … iew?usp=sharing , https://hwbot.org/benchmarks/cpu_frequency/su … issions/5568402
Pretty awesome findings with that board. Yea at minimum i would like cedar mill/presler compatibility. Im not sure why im intrigued by nf4 intel or the other oddball shortlived 955x. My board is a asus p5nd2-sli but yea thank you for sharing your findings.
greasemonkey90s wrote on 2025-08-04, 19:36:R-998 wrote on 2025-08-04, 07:58:greasemonkey90s wrote on 2025-04-07, 08:08:Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
It cant , just not enough datalines\adress space for Core2 cpus , i played around MSI P4N Diamond and wrote mod for it , Cedar Mill can be runned only w pinmod , and Presler CPU can be runned w pinmod + bios mod that removes one of checks that triggers unavalible register (MSR 2CH). Pinmod for both - insulated J2 + AL3 , modbios w removed MSR call attached. Board also can run 771 Xeons 50xx series w sticker + pinmod , that allows you get 2 core 4 threads at 4ghz on air on this board , w performance comparable w low-clock Conroe E6xxx. https://drive.google.com/file/d/1HCtbhrdY5TLt … iew?usp=sharing , https://hwbot.org/benchmarks/cpu_frequency/su … issions/5568402
shortlived 955x
955x much better for mods , its literally same as 975x at compatibility , just soft and trace-locked , i played around P5WD2 and succesfully runned ALL what released for socket 775....
R-998 wrote on 2025-08-04, 07:58:greasemonkey90s wrote on 2025-04-07, 08:08:Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
It cant , just not enough datalines\adress space for Core2 cpus , i played around MSI P4N Diamond and wrote mod for it , Cedar Mill can be runned only w pinmod , and Presler CPU can be runned w pinmod + bios mod that removes one of checks that triggers unavalible register (MSR 2CH). Pinmod for both - insulated J2 + AL3 , modbios w removed MSR call attached. Board also can run 771 Xeons 50xx series w sticker + pinmod , that allows you get 2 core 4 threads at 4ghz on air on this board , w performance comparable w low-clock Conroe E6xxx. https://drive.google.com/file/d/1HCtbhrdY5TLt … iew?usp=sharing , https://hwbot.org/benchmarks/cpu_frequency/su … issions/5568402
Hmm, ASUS P5ND2 (nForce4 Intel) with bios from the P5NSLI can run both Wolfdale and Kentsfield.
Thanks for pinout for the older Cedar Mill steppings, newest one (D0) can run without any pinmod on Prescott board.
R-998 wrote on Yesterday, 04:03:955x much better for mods , its literally same as 975x at compatibility , just soft and trace-locked , i played around P5WD2 and succesfully runned ALL what released for socket 775....
How do you managed to run Kentsfield on Pentium 4/D only board? I tried with Conroe pinmod on the Asus P5WD2-E (with P5W DH bios) it posted rarely and showed only 2 cores. On other boards it didn't even showed any post codes.
Vlad94 wrote on Yesterday, 14:05:Hmm, ASUS P5ND2 (nForce4 Intel) with bios from the P5NSLI can run both Wolfdale and Kentsfield. […]
R-998 wrote on 2025-08-04, 07:58:greasemonkey90s wrote on 2025-04-07, 08:08:Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
It cant , just not enough datalines\adress space for Core2 cpus , i played around MSI P4N Diamond and wrote mod for it , Cedar Mill can be runned only w pinmod , and Presler CPU can be runned w pinmod + bios mod that removes one of checks that triggers unavalible register (MSR 2CH). Pinmod for both - insulated J2 + AL3 , modbios w removed MSR call attached. Board also can run 771 Xeons 50xx series w sticker + pinmod , that allows you get 2 core 4 threads at 4ghz on air on this board , w performance comparable w low-clock Conroe E6xxx. https://drive.google.com/file/d/1HCtbhrdY5TLt … iew?usp=sharing , https://hwbot.org/benchmarks/cpu_frequency/su … issions/5568402
Hmm, ASUS P5ND2 (nForce4 Intel) with bios from the P5NSLI can run both Wolfdale and Kentsfield.
Thanks for pinout for the older Cedar Mill steppings, newest one (D0) can run without any pinmod on Prescott board.
R-998 wrote on Yesterday, 04:03:955x much better for mods , its literally same as 975x at compatibility , just soft and trace-locked , i played around P5WD2 and succesfully runned ALL what released for socket 775....
How do you managed to run Kentsfield on Pentium 4/D only board?
For pentium D boards it s way easier than P4 only , you need to add COMP8 termination , on-die or on-board , on P5WD2 you can solder it lower than socket (check boardview scheme for place) , mods for P4 only board way difficult but i did it too and runned 45nms w high fsb + working cores , i show public later on my article....
Vlad94 wrote on Yesterday, 14:05:Hmm, ASUS P5ND2 (nForce4 Intel) with bios from the P5NSLI can run both Wolfdale and Kentsfield. […]
R-998 wrote on 2025-08-04, 07:58:greasemonkey90s wrote on 2025-04-07, 08:08:Would be awesome if this would work on intel edition nforce4. Awesome nom the less.
It cant , just not enough datalines\adress space for Core2 cpus , i played around MSI P4N Diamond and wrote mod for it , Cedar Mill can be runned only w pinmod , and Presler CPU can be runned w pinmod + bios mod that removes one of checks that triggers unavalible register (MSR 2CH). Pinmod for both - insulated J2 + AL3 , modbios w removed MSR call attached. Board also can run 771 Xeons 50xx series w sticker + pinmod , that allows you get 2 core 4 threads at 4ghz on air on this board , w performance comparable w low-clock Conroe E6xxx. https://drive.google.com/file/d/1HCtbhrdY5TLt … iew?usp=sharing , https://hwbot.org/benchmarks/cpu_frequency/su … issions/5568402
Hmm, ASUS P5ND2 (nForce4 Intel) with bios from the P5NSLI can run both Wolfdale and Kentsfield.
Thanks for pinout for the older Cedar Mill steppings, newest one (D0) can run without any pinmod on Prescott board.
R-998 wrote on Yesterday, 04:03:955x much better for mods , its literally same as 975x at compatibility , just soft and trace-locked , i played around P5WD2 and succesfully runned ALL what released for socket 775....
How do you managed to run Kentsfield on Pentium 4/D only board? I tried with Conroe pinmod on the Asus P5WD2-E (with P5W DH bios) it posted rarely and showed only 2 cores. On other boards it didn't even showed any post codes.
So p5n-e sli bios works on p5nd2-sli what does it break?. Interesting didnt think a 650sli bios would work. Thanks
