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N/B Strap?
- Thread starter sc121
- Start date
RM_Bulldog
Gawd
- Joined
- Jan 12, 2003
- Messages
- 697
NB strap gives you different ram ratios and that is about all to my understanding 
Syphon Filter
2[H]4U
- Joined
- Dec 19, 2003
- Messages
- 2,597
I too would like to know a full explanation of this...
second thing on google man! search before you post. don't be lazy. [if you can help it]
but here is what i cut and pasted.
N/B Strap CPU As
Common Options : By CPU, PSB400, PSB533, PSB800
Quick Review
This BIOS feature allows you to circumvent the CPU-to-DRAM ratio limitation found in the newer Intel i865/i875-series of chipsets. In those chipsets, Intel has chosen to limit the choices of available CPU-to-DRAM ratios.
When a 400MHz FSB processor is installed, the choice of CPU-to-DRAM ratio is limited to 3:4.
When a 533MHz FSB processor is installed, the choices of CPU-to-DRAM ratio are limited to 1:1 or 4:5.
When a 800MHz FSB processor is installed, the choices of CPU-to-DRAM ratio are limited to 1:1, 3.2 or 5:4.
Fortunately, this BIOS feature allows you to circumvent that limitation.
The N/B Strap CPU As BIOS feature actually controls the setting of the external hardware reset strap assigned to the MCH (Memory Controller Hub) of the chipset. By setting it to PSB400, PSB533 or PSB800, you can trick the chipset into thinking that the 400MHz FSB or 533MHz FSB or the 800MHz FSB is being used.
When this BIOS feature is set to PSB800, you will be able to access the 800MHz CPU-to-DRAM ratios of 1:1, 3.2 and 5:4.
When this BIOS feature is set to PSB533, you will be able to access the 533MHz CPU-to-DRAM ratios of 1:1 and 4:5.
When this BIOS feature is set to PSB400, you will be able to access the 400MHz CPU-to-DRAM ratio of 3:4.
By default, this BIOS feature is set to By CPU, whereby the hardware strap will be set according to the actual FSB rating of the processor.
Generally, you do not need to manually adjust the hardware strap setting. But if you require access to the CPU-to-DRAM ratio that would normally not be available to you, then this BIOS feature would be very helpful indeed.
[if you can help it] but here is what i cut and pasted.
N/B Strap CPU As
Common Options : By CPU, PSB400, PSB533, PSB800
Quick Review
This BIOS feature allows you to circumvent the CPU-to-DRAM ratio limitation found in the newer Intel i865/i875-series of chipsets. In those chipsets, Intel has chosen to limit the choices of available CPU-to-DRAM ratios.
When a 400MHz FSB processor is installed, the choice of CPU-to-DRAM ratio is limited to 3:4.
When a 533MHz FSB processor is installed, the choices of CPU-to-DRAM ratio are limited to 1:1 or 4:5.
When a 800MHz FSB processor is installed, the choices of CPU-to-DRAM ratio are limited to 1:1, 3.2 or 5:4.
Fortunately, this BIOS feature allows you to circumvent that limitation.
The N/B Strap CPU As BIOS feature actually controls the setting of the external hardware reset strap assigned to the MCH (Memory Controller Hub) of the chipset. By setting it to PSB400, PSB533 or PSB800, you can trick the chipset into thinking that the 400MHz FSB or 533MHz FSB or the 800MHz FSB is being used.
When this BIOS feature is set to PSB800, you will be able to access the 800MHz CPU-to-DRAM ratios of 1:1, 3.2 and 5:4.
When this BIOS feature is set to PSB533, you will be able to access the 533MHz CPU-to-DRAM ratios of 1:1 and 4:5.
When this BIOS feature is set to PSB400, you will be able to access the 400MHz CPU-to-DRAM ratio of 3:4.
By default, this BIOS feature is set to By CPU, whereby the hardware strap will be set according to the actual FSB rating of the processor.
Generally, you do not need to manually adjust the hardware strap setting. But if you require access to the CPU-to-DRAM ratio that would normally not be available to you, then this BIOS feature would be very helpful indeed.