I just bought a P4 2.4a that came with a free ECS 848P-A motherboard, it has 768 megs of PC 2100 DDR. With this ghetto setup how much is the most I could overclock to with out damaging the system?
How much can I overclock a 2.4a w/ crappy MB/RAM
- Thread starter hotarri
- Start date
Lyfer
Diamond Member
- May 28, 2003
- 5,842
- 2
- 81
The 2.4A you have is rated at 100MHZ FSB x 24 = 2400MHZ. Try bumping the FSB up slowly until you hit 133mHZ. If you go over 133MHZ you will need a PCI/AGP lock which your board doesn't have which will run your pci/agp devices outta spec which is bad.
I think 2.6GHZ is attainable.
I think 2.6GHZ is attainable.Currently it is actually setup as 18x133 Mhz, is this normal since I thought P4s had a locked ratio.
167-183 is the fsb that has been achieved with this cpu and pc3200 memory. Don't know if your motherboard has "ratios" for the memory. If not, you may be limited to 133 fsb, if the memory runs in sync with the cpu.
I looked in the MB manual to see what frequency related options it has. I have copied down the different options and their descriptions from the manual.
Auto Detect PCI Clk: When this item is enabled, BIOS will disable the clock signal of free DIMM and PCI slots.
Async AGP/PCI Clk: This item allows you to select the fixed clock to generate the output to AGP/PCI frequency.
CPU Clock: Use the CPU host clock to set the FSB frequency for the installed processor.
Besides that there is another section involving memory. I also copied down the options and their descriptions.
DRAM Timing Selectable: The value in this field depends on performance parameters of the installed memory chips (DRAM). Do not change the value from the factory setting unless you install new memory that has a different performance rating than the original DRAMs.
CAS Latency Time: When synchronus DRAM is installed, the number of clock cycles of CAS latency depends on the DRAM timing. Do not reset this field from the default value specified by the system designer.
Active to Precharge Delay: The precharge time is the number of cycles it takes for DRAM to accumulate its charge before refresh.
DRAM RAS# to CAS# Delay: This field lets you insert a timing delay between the CAS and RAS strobe signals, used when DRAM is written to, read from, or refreshed. Disabled gives faster performance; and Enabled gives more stable performance.
DRAM RAS# Precharge: Select the number CPU clocks allocated for the Row Address Strobe (RAS#) signal to accumulate its charge before the DRAM is refreshed. If insufficient time is allowed, refresh may be incomplete and data lost.
Memory Frequency For: This item sets the main memory frequency. When you use an external graphics card, you can adjust this to enable the best performance for your system.
DDR Voltage: This allows you to adjust DDR voltage.
Fast Chip Select: This item allows you to read the Data transfer from CPU to GMCH.
CPC Addr/Control: This enables the DDR channel A and channel B memory access to reduce the loading for selective CPC (Clock Per Command).
That is all I could find, sorry for being a total noob, thanks all for the help =)
Auto Detect PCI Clk: When this item is enabled, BIOS will disable the clock signal of free DIMM and PCI slots.
Async AGP/PCI Clk: This item allows you to select the fixed clock to generate the output to AGP/PCI frequency.
CPU Clock: Use the CPU host clock to set the FSB frequency for the installed processor.
Besides that there is another section involving memory. I also copied down the options and their descriptions.
DRAM Timing Selectable: The value in this field depends on performance parameters of the installed memory chips (DRAM). Do not change the value from the factory setting unless you install new memory that has a different performance rating than the original DRAMs.
CAS Latency Time: When synchronus DRAM is installed, the number of clock cycles of CAS latency depends on the DRAM timing. Do not reset this field from the default value specified by the system designer.
Active to Precharge Delay: The precharge time is the number of cycles it takes for DRAM to accumulate its charge before refresh.
DRAM RAS# to CAS# Delay: This field lets you insert a timing delay between the CAS and RAS strobe signals, used when DRAM is written to, read from, or refreshed. Disabled gives faster performance; and Enabled gives more stable performance.
DRAM RAS# Precharge: Select the number CPU clocks allocated for the Row Address Strobe (RAS#) signal to accumulate its charge before the DRAM is refreshed. If insufficient time is allowed, refresh may be incomplete and data lost.
Memory Frequency For: This item sets the main memory frequency. When you use an external graphics card, you can adjust this to enable the best performance for your system.
DDR Voltage: This allows you to adjust DDR voltage.
Fast Chip Select: This item allows you to read the Data transfer from CPU to GMCH.
CPC Addr/Control: This enables the DDR channel A and channel B memory access to reduce the loading for selective CPC (Clock Per Command).
That is all I could find, sorry for being a total noob, thanks all for the help =)
I picked the combo up for $119, but then end up spend another $30 for a Zalman CNPS7000A Heatsink & fan. The stock fan was way too loud with load cpu, like it's about to take off anytime soon!
I was unable to get any extra juice out of this cpu! Nada, not even when I up the FSB from 133 to 140Mhz, it will give me a blue screen almost instantly. For you guys who succesfully overclocked this cpu, any suggestions on what might have I've done wrong? All I did was changing the FSB, none of other tweaking. I'm sure it's not my memory either, I have 2 stick of memory, PC2700 & PC3200, tried with either one of them and no luck.
I was unable to get any extra juice out of this cpu! Nada, not even when I up the FSB from 133 to 140Mhz, it will give me a blue screen almost instantly. For you guys who succesfully overclocked this cpu, any suggestions on what might have I've done wrong? All I did was changing the FSB, none of other tweaking. I'm sure it's not my memory either, I have 2 stick of memory, PC2700 & PC3200, tried with either one of them and no luck.
anybody know if one can use the pin trick to give the prescott more voltage on the ecs board? this is a solid board, but it does not allow voltage adjustment. for northwood, one can short pins together to get higher voltage. i guess it is doable with prescott, but we need a table relating 1's and 0's to voltages.
Zap
Elite Member
- Oct 13, 1999
- 22,377
- 7
- 81
For voltage info, just go to Intel's developer site and download the pertinent white papers. Should work the same as for the Northwood, just different pattern.
You will need to set "Async AGP/PCI Clk" to 66/33 and "Memory Frequency For" to lowest (probably says 266 or 1:1). Set "DDR Voltage" to something higher because when you bump FSB you will bump your RAM speed above spec as well. Use loose timings for your RAM. Also, sounds like you have a 256MB and a 512MB sticks of RAM (AFAIK the ECS board has only 2 RAM slots). To test for overclocking, either choose your better stick of RAM or your larger, and remove the other stick.
I think Lyfer is confused about the various P4 chips. In chronological order with core type, multiplier times FSB:
2.4 - original Northwood 24x100
2.4B - Northwood 18x133
2.4C - Northwood with HyperThreading 12x200
2.4A - Prescott 18x133
Yes, the 2.4A is the most recent chip. There were other "A" designations for P4 chips, but those were the 1.6A, 1.8A and 2.0A and designated "A" to differentiate them from Willamette core P4 chips at the same MHz. Any "A" above those speeds, for now, is a Prescott running at 133/533 FSB and without HyperThreading.
You will need to set "Async AGP/PCI Clk" to 66/33 and "Memory Frequency For" to lowest (probably says 266 or 1:1). Set "DDR Voltage" to something higher because when you bump FSB you will bump your RAM speed above spec as well. Use loose timings for your RAM. Also, sounds like you have a 256MB and a 512MB sticks of RAM (AFAIK the ECS board has only 2 RAM slots). To test for overclocking, either choose your better stick of RAM or your larger, and remove the other stick.
I think Lyfer is confused about the various P4 chips.
In chronological order with core type, multiplier times FSB:2.4 - original Northwood 24x100
2.4B - Northwood 18x133
2.4C - Northwood with HyperThreading 12x200
2.4A - Prescott 18x133
Yes, the 2.4A is the most recent chip. There were other "A" designations for P4 chips, but those were the 1.6A, 1.8A and 2.0A and designated "A" to differentiate them from Willamette core P4 chips at the same MHz. Any "A" above those speeds, for now, is a Prescott running at 133/533 FSB and without HyperThreading.
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