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Dimension C521 CPU upgrade

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July 12, 2009 11:34:13 PM

I have a Dell Dimension C521, and i am looking to upgrade my processor from the AMD Athalon 64 X2 to something newer, possibly the AMD Phenom series, could anyone tell me what would be some decent processors, without breaking a budget, i have seen the Phenom 9500 for 89.99 on TigerDirect...
a c 105 à CPUs
July 12, 2009 11:51:54 PM

I do not believe the C521 Bios will support the AMD phenom. The PC itself is the slimline version of the E521. They both use the same motherboard and the E521 supports up to the Athlon x2 6000 (although some people state they have run the x2 6400). Delluser1 tends to know these thing better.

a b à CPUs
July 13, 2009 1:07:29 AM

You do well enough ct1615.
The highest I've seen used is the x2 6000, but I've never been much into AMD so never looked into it further.
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July 13, 2009 8:22:23 AM

The C521 should support up to the AMD Athlon X2 5600+ for sure, the 6000+ may work depending on the model. I'm thinking the Brisbane 6000+ should work not the Windsor.

None of the Phenoms work, nor is the Athlon x2 7750 Kuma supported either.
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July 13, 2009 4:34:38 PM

Sorry, but dell doesn't want to update the BIOS to let you use a newer CPU. They want you to buy a new computer. After all, the only limitation to putting a phenom or phenom II based CPU into an AM2 board like yours is the BIOS.
July 13, 2009 4:55:26 PM

^+1. The board may support Phenoms but the Dell's proprietary BIOS limits this.
October 25, 2009 3:00:36 AM

OM3RT4 said:
I have a Dell Dimension C521, and i am looking to upgrade my processor from the AMD Athalon 64 X2 to something newer, possibly the AMD Phenom series, could anyone tell me what would be some decent processors, without breaking a budget, i have seen the Phenom 9500 for 89.99 on TigerDirect...


Athlon 64 X2 6000+ works.
I have Dell BIOS 1.1.11 installed and I downloaded the drivers from AMD.

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