Monitor your resource usage with Resmon (Win+R, then 'resmon'), and click the CPU/RAM tabs to see any loads. Suggest you also run a
UserBenchmark test, and post the link to the results.
Just so you know, the GT710 is sloooooow. Some simple comparisons:
GT710 vs Radeon R7 Gfx (onboard gfx on my 2014 AMD A8-7600 - just to highlight the GT710's lack of power)
GDDR5 VRAM cards:(in order of speed)
GT710 vs GT 1030 (a sub-£70 card with 2GB)
GT710 vs GTX 1050 (the card I replaced my onboard Radeon R7 - also 2GB, but can't find a price)
GT710 vs GTX 1050ti (4GB VRAM and £120 to £140)
GT710 vs GTX 1650 (4GB VRAM and £130 to £180) *
GT710 vs GTX 1660 (6GB VRAM and £200 to £230)
* some versions of the 1650 come with GDDR6 - depends on what's being sold, but it's 5-10% difference, so not a huge diff. Be aware that benchmark scores don't differentiate between versions.
GDDR6 VRAM cards:(in order of speed)
GT710 vs GT 1650 Super (4GB and £155 to £185)
GT710 vs GT 1660 Super (6GB and £210 to £260)
Given your lack of a need for higher end GPU stuff, such as gaming, I see little point in splashing out for 6GB cards, and would focus on the 4GB ones. The amount of RAM is probably not the issue, so much as the GPU and potential bottleneck of the slow GT710. You could try the 2GB GT 1030 as a cheap and cheerful improvement, but it wouldn't necessarily be too noticeable. Perhaps it's easier to list available, realistic GPUs:
(Effective speed %, wattage, approx average price, and bang per buck score):
GT 710 - 19w - 3.3% - N/A - N/A
GT 1030 - 30w - 14.9% - £70 - 42.6
GT 1050ti - 75w - 31.6% - £155 - 40.8
GT 1650 - 75w - 41.0% - £160 - 51.3
GT 1650S - 90w - 58.5% - £170 - 68.8
Given that for an extra £20-£30, I'd look to the 1650 Super, but be aware that it requires a PCI x16 slot and a 6-pin PCI power connector from the power supply (* as does the GDDR6 1650). It's a very decent option. If the power/slot requirements are an issue, the 1650 is the best option, then the 1050ti, but given the bang per buck, the latter isn't worth it. So to sum up:
1030 - Cheap n cheerful, might not be a huge change
1050ti - Far better than what you have, but not priced competitively
1650 - Better still than the 1050ti, and more price efficient (be aware of GDDR6 versions' power/slot requirements)
1650S - Best option, if prepared to pay £155-£185.
See
PC PartPicker for all cards / prices. I don't recommend AMD cards generally, short of need for more (slower) VRAM at lower prices. I have used Aria, CCL, Ebuyer, Overclockers, Scan. I use Amazon only if supplied/backed by Amazon. My own personal pick from all the cards, brands and suppliers available:
https://uk.pcpartpicker.com/product/LBrYcf/evga-gefo... (from Scan)
Now then. That was a nice wake-me-up post. Time for a cuppa.