Do I need to upgrade my Dell Inspiron 570?

Yusif, this is the list of Dell tested CPUs for use in Inspiron 570:"

7VM5 AMD Athlon X4 640 3.00 95 watt

8KDMP AMD Athlon X4 635 2.90 95 watt

V2PYH AMD Athlon X4 630 2.80 95 watt

2PJ3W AMD Athlon X4 630 2.80 95 watt

Y9H55 AMD Athlon X4 620 2.60 95 watt

DMC67 AMD Athlon X3 425 2.70 95 watt

77XN0 AMD Athlon X2 255 3.10 65 watt

F9GN5 AMD Phenom X2 550 3.10 80 watt

40X63 AMD Phenom X2 545 3.00 80 watt

F5HVR AMD Athlon X2 250 3.00 65 watt

GJ44V AMD Athlon X2 245 2.90 65 watt

MVXJ0 AMD Athlon X2 245 2.90 65 watt

M6XFK AMD Athlon X2 240 2.80 65 watt

91D21 AMD Athlon X2 215 2.70 65 watt

DH25P AMD Phenom 945 3.00 95 watt or 125 watt

5H0HC AMD Phenom 945 3.00 95 watt or 125 watt

RWPT3 AMD Athlon 435 2.90 95 watt

7GN6M AMD Athlon 435 2.90 95 watt

YYT2W AMD Phenom 830 2.80 95 watt

MNV5C AMD Phenom 925 2.80 95 watt

M1HV1 AMD Phenom 820 2.80 95 watt

2VGGH AMD Phenom 720 2.80 95 watt

FPFRX AMD Sempron 180 2.40 45 watt

XY10C AMD Sempron 140 2.70 45 watt" for more info about upgrading your computer, check this forum. Hope this helps, good luck.