Upgraded video card and now

This may not be related to your specific issue but 2GB of ram isn't good.
4GB is minumum these days.

this is the specs on the psu
Model

Brand
Thermaltake

Model
W0117RU

Series
toughpower

Spec

Type
ATX12V / EPS12V

Maximum Power
750W

Fans
1x 14 cm Fan

PFC
Active

Main Connector
20+4Pin

+12V Rails
4

PCI-Express Connector
2 x 6-Pin

SATA Power Connector
6

SLI
Certified

CrossFire
Ready

Modular
No

Power Good Signal
100-500ms

Hold-up Time
16ms min.

Efficiency
up to 85%

Energy-Efficient
80 PLUS BRONZE Certified

Over Voltage Protection
+5V 7.0 Vmax
+3.3V 4.5 Vmax
+12V 15.6 Vmax

Input Voltage
100 - 240 V

Input Frequency Range
47 - 63 Hz

Input Current
10A @ 115V, 5A @ 230V

Output
+3.3@30A,+5V@28A,+12V1@18A,+12V2@18A,+12V3@18A,+12V4@18A,-12V@0.8A,+5VSB@3A

MTBF
MTBF>120,000 hours

Approvals
CE, CB, TUV, FCC, UL, CUL, and BSMI certified

Features

Connectors
1 x Main connector (20+4 pin)
1 x 12V (P4)
1 x 12V (8pin)
8 x peripheral
6 x SATA
2 x Floppy
2 x PCI-E

Features
SLI, Cross-Fire, and Dual Core CPU ready
Protections: Over Current, Over Voltage, and Short-Circuit protection
Next generation four +12V rails(12V1, 12V2, 12V3, 12V4) supports high-end graphic card and PC system (combined loading of 48A)
Independent Voltage Circuit: offers unflappable current delivery under heavy load and makes voltage output more stable
Industrial grade components (capacitor, transformer, etc)

Manufacturer Warranty

Parts
5 years limited

Labor
5 years limited

any thoughts anyone

Your PSU isn't the problem.

Your system RAM is definitly going to cause a problem.When the system doesn't have enough RAM it will use the HDD as if it were RAM which can result in really slow performance.But my guess is that your previous GPU bottlenecked your CPU, not having it work as hard, and now with a GTX560ti it's allowing it to work harder but now the CPU is the bottleneck.

Definately add more ram and also overclock your cpu , you are getting a bottle neck, you got yourself a great card you just need more grunt to push it.

ok the mb i believe is rated for 8gb memory but i am running 32bit windows 7 do i have to upgraded windows to 64bit in order to increase ram to 8gb or will the 32bit windows read it

Yes you will have to upgrade to 64 bit

Thanks I will give that a go and let you know how it works out

Ok goodluck, increasing the ram to 8 gig and running 64bit will help quite a bit.

I'm guessing that you previously has a 512MB 3870 (I don't think there were any 1GB). The slow startup could be remnants from the old drivers so I suggest uninstalling your current drivers, use driver sweeper to remove any traces of AMD or NVIDIA drivers, and re-install the drivers. If you're using the same settings as you were when you had your 3870 and experience worse performance then it might be the drivers. Of course if you raised settings first then it could be lack of RAM  . You can increase your RAM to 4GB, but since you have a 32-bit OS you will only be able to use a little under 3GB.

I think it's a little expensive to get 8GB of DDR2 at the moment as you'd have to go 4x2GB. You would also have to upgrade your OS to use it. I say just get either a 2GB or 1GB kit (2x512MB) to last you till you move to DDR3 and 64-bit