F5F Stay Refreshed Hardware Desktop System struggles to reach maximum clock speed of 2.6 GHz.

System struggles to reach maximum clock speed of 2.6 GHz.

System struggles to reach maximum clock speed of 2.6 GHz.

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damojosh
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07-08-2016, 09:49 AM
#1
I've tested two CPUs in my Optiplex 760, but neither reaches above 2.6 GHz, even when under heavy loads or stress tests. I also updated the BIOS from A06 to A16, yet the issue persists. When I start Ubuntu, it warns that VMX is disabled in the BIOS—does this relate to the problem? My PC functions normally, but I invested in the full CPU package and want to utilize it completely. Thanks!
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damojosh
07-08-2016, 09:49 AM #1

I've tested two CPUs in my Optiplex 760, but neither reaches above 2.6 GHz, even when under heavy loads or stress tests. I also updated the BIOS from A06 to A16, yet the issue persists. When I start Ubuntu, it warns that VMX is disabled in the BIOS—does this relate to the problem? My PC functions normally, but I invested in the full CPU package and want to utilize it completely. Thanks!

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ItzGum231
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07-08-2016, 10:14 AM
#2
CPU-ID displays the frequency, multiplier, and FSB clock details. It helps identify whether the board is running at a reduced FSB speed due to RAM performance or power efficiency considerations.
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ItzGum231
07-08-2016, 10:14 AM #2

CPU-ID displays the frequency, multiplier, and FSB clock details. It helps identify whether the board is running at a reduced FSB speed due to RAM performance or power efficiency considerations.

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ViacoolHD
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07-21-2016, 01:35 AM
#3
I solved it—it was constrained by RAM. I experimented with 800 instead of 667 and it’s now running smoothly!
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ViacoolHD
07-21-2016, 01:35 AM #3

I solved it—it was constrained by RAM. I experimented with 800 instead of 667 and it’s now running smoothly!

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fuhqing
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07-21-2016, 06:56 PM
#4
The LGA 775 dislikes clutter or sluggish RAM, which explains why it took longer after the RAM change.
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fuhqing
07-21-2016, 06:56 PM #4

The LGA 775 dislikes clutter or sluggish RAM, which explains why it took longer after the RAM change.

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WildCandy
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07-21-2016, 10:44 PM
#5
It should function properly with DDR2-667. A 667MHz RAM paired with an 333MHz FSB gives a theoretical speed of around 2.83 GHz. The board likely uses a fixed RAM-to-FSB ratio, allowing it to support faster speeds like DDR2-800 with 333MHz FSB while adjusting the clock to match the lower frequency. The math checks out.
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WildCandy
07-21-2016, 10:44 PM #5

It should function properly with DDR2-667. A 667MHz RAM paired with an 333MHz FSB gives a theoretical speed of around 2.83 GHz. The board likely uses a fixed RAM-to-FSB ratio, allowing it to support faster speeds like DDR2-800 with 333MHz FSB while adjusting the clock to match the lower frequency. The math checks out.

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