So my friend is trying to upgrade his pc it has 2 gb of ram hes going for 6gb buying 1 4gb stick of ddr2 for 15 euro and buying a gtx 750 ti 2gb for 75 euro and problem is will the motherboard run those 2 MOTHERBOARD IS a Intel Corporation DG41TY
Yes, those two DDR2 chips (one 2 GB and one 4 GB) will be recognized by the motherboard, especially since each DIMM slot is a separate channel. Here is a very important question, since that motherboard design is 8 years old: What version of windows is he running? Most importantly, is it 32 bit of 64 bit. If it's only 32 bit, then it won't recognize above 4 GB (technically 3.50-3.75 GB). The PCIe is 2.0, and therefore "should" work with the GTX 750 Ti. I'm assuming that is power supply is at least 300 watts.
Yes, those two DDR2 chips (one 2 GB and one 4 GB) will be recognized by the motherboard, especially since each DIMM slot is a separate channel. Here is a very important question, since that motherboard design is 8 years old: What version of windows is he running? Most importantly, is it 32 bit of 64 bit. If it's only 32 bit, then it won't recognize above 4 GB (technically 3.50-3.75 GB). The PCIe is 2.0, and therefore "should" work with the GTX 750 Ti. I'm assuming that is power supply is at least 300 watts.
Operating System
Windows 10 Home 64-bit
CPU
Intel Core 2 Duo E7500 @ 2.93GHz58 °C
Wolfdale 45nm Technology
RAM
2,00GB Single-Channel DDR2 @ 399MHz (5-5-5-18)
Motherboard
Intel Corporation DG41TY (LGA775)51 °C
Graphics
SyncMaster (1680x1050@60Hz)
1024MB NVIDIA GeForce GTS 250 (Gigabyte)61 °C
Storage
465GB Western Digital WDC WD5001AALS-00L3B2 ATA Device (SATA)42 °C
Optical Drives
HL-DT-ST DVDRAM GH22LS50 ATA Device
Audio
High Definition Audio Device
Interesting. Well it should work. I suggest that you swap the 4 GB DIMM into the #1 RAM slot, and place the smaller 2 GB DIMM into the #2 slot. Please let us know how it works out. So very interesting.