Part Numbers for Computer

So, I was asking the Dell what CPU's would be compatible with my PC and they gave me these numbers:
Part numbers: RXHF8 and F3VXR and KR2TG

What are they and how do I find the CPU I'm looking for using those numbers? I've tried searching the Dell website with those numbers but nothing comes up?
 
Solution
Those are Names of SVC Kits( They mean Spare parts number)
SVC Kit 3W8GD : Processor, Haswell I5-4670, 3.4GHz, 86W, 4C - $326.976
SVC Kit 7KDR1 : Processor, 3.1 GHz, Haswell i5-4440, 95W, C0 - $280.576
SVC Kit KR2TG : Processor, Haswell I5-4570, 3.2GHz, 86W, 4C - $286.4

Search in this site : http://computer-spare-parts.info/catalog/

ImranKhan1992

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Those are Names of SVC Kits( They mean Spare parts number)
SVC Kit 3W8GD : Processor, Haswell I5-4670, 3.4GHz, 86W, 4C - $326.976
SVC Kit 7KDR1 : Processor, 3.1 GHz, Haswell i5-4440, 95W, C0 - $280.576
SVC Kit KR2TG : Processor, Haswell I5-4570, 3.2GHz, 86W, 4C - $286.4

Search in this site : http://computer-spare-parts.info/catalog/
 
Solution