Just got the combo arrived today, using Intel stock cooler(mega vaccum sound @ 100% fan speed) added arctic silver V and 1.4375V in BIOS... Idle is 55C(2000RPM quiet) full load is 66C(4300RPM mega vaccum sound OMG). The motherboard I have is Asus P5P800-SE and 1GB Corsair Dual channel DDR 2x512 DDR400 CL2.5-3-3... Here is WCPUID [ WCPUID Version 3.3 (c) 1996-2004 By H.Oda! ] Processor #1 : ---- / EF912C3A Platform : ---- Vendor String : GenuineIntel CPU Type : Original OEM Processor (0) Family : 15 (0) Model : 4 (0) Stepping ID : 9 (-) Brand ID : - (-) APIC : 0 HT Log.CPU Cnt : ---- Name String : Intel(R) Pentium(R) 4 CPU 2.66GHz Internal Clock : 3998.08 MHz System Bus : 799.62 MHz QDR System Clock : 199.90 MHz Scalable Speed : 133.33 MHz Multiplier : 20.0 L1 I-Cache : ---- L1 D-Cache : 16K Byte L1 T-Cache : 12K uOps L1 Cache : ---- L2 Cache : 1024K Byte L2 Speed : 3998.08 MHz (Full) MMX Unit : Supported SSE Unit : Supported SSE2 Unit : Supported SSE3 Unit : Supported MMX2 Unit : Not Supported 3DNow! Unit : Not Supported 3DNow!+ Unit : Not Supported Host Bridge : 8086:2570.02 [Intel 865G/PE/P/GV/848P] IDE Controller : 8086:24DB.02 [Intel 82801EB (ICH5)] VGA Device : 1002:4144.00 [ATI RADEON 9700/9500 Series] Memory Size : 1024M Byte Memory Clock : ---- OS Version : Windows XP Version 5.1.2600 ----------------------- StdFunc 0 : 00000005 756E6547 6C65746E 49656E69 StdFunc 1 : 00000F49 00010800 0000651D BFEBFBFF StdFunc 2 : 605B5101 00000000 00000000 007C7040 StdFunc 3 : 00000000 00000000 00000000 00000000 StdFunc 4 : 00000000 00000000 00000000 00000000 StdFunc 5 : 00000040 00000040 00000000 00000000 ExtFunc 0 : 80000008 00000000 00000000 00000000 ExtFunc 1 : 00000000 00000000 00000001 20000000 ExtFunc 2 : 20202020 20202020 20202020 6E492020 ExtFunc 3 : 286C6574 50202952 69746E65 52286D75 ExtFunc 4 : 20342029 20555043 36362E32 007A4847 ExtFunc 5 : 00000000 00000000 00000000 00000000 ExtFunc 6 : 00000000 00000000 04006040 00000000 ExtFunc 7 : 00000000 00000000 00000000 00000000 ExtFunc 8 : 00003024 00000000 00000000 00000000 00000017h : 00120000 00000000 00000000 00000000 0000001Bh : 00000000 FEE00900 00000000 00000000 0000002Ah : 00000000 00000080 00000000 00000000 0000002Bh : 00000000 0000000E 00000000 00000000 0000002Ch : 00000000 14110614 00000000 00000000 0000019Ah : 00000000 00000002 00000000 00000000 000001A0h : 00000004 20840089 00000000 00000000 ##--- Date 03/03/2006, Time 22:22:10 / 2.0.0.0 TMP-Man Asus P5P800-SE Pentium 506 2.66Ghz @ 4000Mhz @ 1.4375v 1024MB Dual Channel DDR400 RAM CL2.5-3-3 40GB 540RPM + 120GB 7200RPM HD 128MB Radeon 9500 mod 9700 @ 360/585

There is an MMX2???? I notice the new CPU-Z also list SSE4, but no processors as of yet supports it. Intel will soon with their next Cores, but I never heard of MMX2. Who supports that? So how stable is it at 4ghz? AMD Athlon 64 X2 4200+ 2GB Dual Channel DDR 3200 Nvidia 6800GT SATA II 250gig 7200rpm 8mb cache Gigabyte Nforce 4 SLI

100% stable TMP-Man Asus P5P800-SE Pentium 506 2.66Ghz @ 4020Mhz @ 1.4375v 1024MB Dual Channel DDR400 RAM CL2.5-3-3 40GB 540RPM + 120GB 7200RPM HD 128MB Radeon 9500 mod 9700 @ 360/585

The MMX2 is meant to be MMX+... Some reason when I copy and paste the data over, it turn into MMX2 instead of MMX+(support by AMD)... TMP-Man Asus P5P800-SE Pentium 506 2.66Ghz @ 4020Mhz @ 1.4375v 1024MB Dual Channel DDR400 RAM CL2.5-3-3 40GB 540RPM + 120GB 7200RPM HD 128MB Radeon 9500 mod 9700 @ 360/585

Nicely done...

oh ok i was wondering. I thought cyrix supported it MMX2 that's why i never heard of it or something but it's really MMX+. Sweet man that's what I call getting the best bang for your buck. I want to do that to a pentium D 805 now. I bet you can get that thing to 3.8ghz. AMD Athlon 64 X2 4200+ 2GB Dual Channel DDR 3200 Nvidia 6800GT SATA II 250gig 7200rpm 8mb cache Gigabyte Nforce 4 SLI

I did more research on the 805 series, since its dual-core = higher power consumption = higher thermal output = less likely to overclock to desirable range like 4Ghz.. Most people can do 3.2-3.4 stock cooling + voltage, few can get upto 3.6-3.8Ghz with voltage increase and very few upto 4Ghz+ with air cooling.. Problem is even though your cooling solution is adaqute, if adding too much voltage to CPU will result as Sudden _______ Death Syndrome like Sudden Northwood Death Syndrome.. People overclock their CPU and did vmod from 1.5v stock to 1.8v and burnt out their CPU from couple hours to couple months... Right now I'm at 1.4500V for the CPU to be completely stable at most application, but as for starcraft/final fantasy XII benchmark, it will run for 1-2 minute then auto bump back to desktop w/o errors, any other program works fine. Even though I increase the voltage to 1.5000v, samething??? Anyways, I still prefer single-core overclocking than dual-core, because for dual-core, if you increase frequency of both CPU to a specific amount let say 4.0Ghz from 2.66 (133x20), you will need to make sure that "both" core able to run at 4Ghz rather than "1" core... Suppose 1 can o/c 4Ghz, but the other only limit to 3.8Ghz, then you are capped at 3.8Ghz. Also dual-core needs more power and I'm afraid my enermax 325Watt (12v @ 32a 16a each x 2)power supply aren't gonna cut it... Other than the Pentium 4 506 series can do 50% overclock, the next one would be Celeron D 356 65nm 133x25 3.33Ghz @ 200x25 5.0Ghz stock air cooling... Super PI 1MB @ ~23sec vs P4 506 @ 4.0Ghz ~33sec. That Celeron is not out yet but have 512KB L2 cache so it will perform more similar to the Prescott series with 1MB cache ^_^... Until multi-threaded application/games come out, dual-core won't really beneifit unless you are doing multi-tasking which I will not be doing at all... TMP-Man Asus P5P800-SE Pentium 506 2.66Ghz @ 4020Mhz @ 1.4375v 1024MB Dual Channel DDR400 RAM CL2.5-3-3 40GB 540RPM + 120GB 7200RPM HD 128MB Radeon 9500 mod 9700 @ 360/585