want to upgrade ram

Hewlett-packard / Hp d530 sff(dq790c)
February 2, 2010 at 16:54:01
Specs: Microsoft Windows XP Professional, 2.793 GHz / 503 MB
I want to upgrade my RAM from 512MB to 1GB. I have two 256MB DDR rams with 133 bus speed.
My question is that if i purchase new 1GB RAM with greater bus speed , Is it benefit for me and I get more speed of system . or the new RAM must be 133.
My system specification are:
Interl P4(2.8)
FSB: 133MHz
Bus Speed: 532MHz

Old Rams
512MB (2*256)
Channels#: Dual
Frequency: 133MHz
Each RAM max Bandwidth; PC2100(133MHz)

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February 2, 2010 at 17:25:19
Faster ram may not fit in the slot.

Go to crucial.com and let them scan your system. They will tell you exactly the maximum upgrade you can make.

Goin' Fishin' (Some day)

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February 2, 2010 at 17:26:14
I doubt you can find 2100 but if you can fine. You can normally safely upgrade the ram to 2700. Many of the ram configurator sites at memory companies will show the newer speeds.

You can not speed up your motherboard however you can benefit for more ram.

Playing to the angels
Les Paul (1915-2009)

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February 2, 2010 at 18:46:47
The P4 is/was a highly inefficient CPU. To partially make up for the inefficiency, the RAM frequency should be run faster than the CPU frequency. The optimal CPU:DRAM ratio for 400MHz & 800MHz FSB P4's is 3:4. For 533MHz FSB CPUs such as yours, the optimal ratio is 4:5.

In other words, since your CPU runs at 133MHz frequency, the optimal RAM speed would be 166MHz frequency, which would be PC2700 (aka DDR333). Obviously the system will run at 1:1 ratio (CPU at 133MHz, RAM at 133MHz) but it won't perform as well as 4:5.

When you pair up PC2700 with PC2100, the slower speed RAM overrides the higher speed RAM & all will run at 133MHz.

Anyhow, according to Crucial.com, your system has 4 DIMM slots & can accept a max of 1GB per slot with PC2700 being recommended.


I suggest you dump the 2 x 256MB PC2100 altogether & replace it with 2 x 1GB PC2700. PC3200 (DDR400) should also work.



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February 3, 2010 at 13:38:16
Thanks Richard59, Jefro and specially jam

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February 4, 2010 at 04:16:55
Mr Jams look like more efficient. But on coming Saturday I'm going to market to purchase ram and then install on my computer then i tell you the correct position......

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