A Quick Question please

They are compatible, but you'd be wasting money getting GT 610 as it won't be any more powerful than integrated graphics. If you told me your budget and what your son wants to do with the PC, I could recommend a better choice.

ah ok he just wants to play WoW which runs quite poorly atm it will run but slow and judders, budget only about £100 im afraid. anything you can do with that?

Edit: I will also need a psu out of that

100 pounds will get you a very decent upgrade.

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Video Card: Gigabyte Radeon HD 7770 1GB Video Card (£76.99 @ Amazon UK)
Power Supply: XFX ProSeries 450W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£35.00 @ Ebuyer)
Total: £111.99
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-10 13:05 GMT+0000)

It's a little bit over the budget, but definitely worth it. That card while being 3 times more expensive than GT 610 is at least 5 times faster.

If you cannot spend that much, then get this combo:

PCPartPicker part list / Price breakdown by merchant / Benchmarks

Video Card: Gigabyte GeForce GT 640 2GB Video Card (£64.38 @ CCL Computers)
Power Supply: XFX ProSeries 450W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply (£35.00 @ Ebuyer)
Total: £99.38
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2012-12-10 13:06 GMT+0000)

It's a bit weaker, but still miles ahead of GT 610.

EDIT: I forgot to ask about the computer case size. That would be a factor in choosing a graphics card.

I have got a new case for him its huge but the psu goes in the bottom and the 20pin cable wont reach as the connector is at the top of the case is there an extension for that cable i could get or a psu with longer cables than standard? will the hd7770 be ok with this old mobo as it dont support pci-e 3.0? Please just indulge my questions i know im thick when it comes to computers and i do appreciate your help. Thanks mate.

No problems  .

That PSU will have long enough cables, unless the case is a meter tall  . It comes from a very reputable brand and has a bronze efficiency certification, which means that it's a high quality unit.

The HD 7770 will work in that motherboard without any problems.

Since you bought a new case, HD 7770 will fit in perfectly.

Will the Celeron E3200 @ 2.4ghz drag down the GPU too much so it won't be able to play wow or will the GPU carry it? i've probably typed that entirely wrong but im sure you get the gist of what im getting at lol

Edit : Just read this comment on that power supply buddy : Good, tidy PSU, nice heathy voltages, all within spec. Practically silent at idle. The only gripe is the ATX power lead is a little short for reaching the other end of the motherboard, and the length of the 4-plug SATA lead could pose problems if you've got a lot of drives. Would be nice if it came with black screws, to go in my black case, but can't have it all I guess..

http://www.novatech.co.uk/products/components/powersupp...

I had an athlon dual core drag down a 6750, sinius, i dont know where this e3200 is in relation to an athlon benchmark wise, though.

That's actually a very legitimate concern. What you're think about is called "Bottlenecking effect". Basically, how the computer games work: their code is executed on the CPU and then the CPU instructs the GPU what to do. In case CPU is too slow to do that, GPU isn't used up to its full potential.

To be perfectly honest, the card will be dragged down a bit. However, World of Warcraft will certainly be playable. The only thing he will need to do is reduce CPU intensive settings, such as shadows or draw distance, and minimize the use of 3rd party addons. In addition, the higher resolution and higher graphical settings one is playing, the more work the GPU has to do, while the work that has to be done by the CPU doesn't change. So increasing graphical settings, such as spell visuals, ambient occlusion, antialiasing or resolution, will not reduce performance and will instead increase the amount of card potential that is used.

Brilliant thanks alot for the information mate I will purchase those 2 items now.

No problem, glad to help  .