Is my PSU enough for this build?

Leprekaun

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Feb 7, 2010
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Hi all. I'm in the process of researching for a PC build but I'm pretty sure I know what I'll be getting. This is primarily a gaming build but I would like to get into video editing and rendering so CPU performance is important for me as well. Anyway, here is my proposed build:

Motherboard: ASUS Z87-A (primary reason for choosing this is that it's the cheapest ASUS board that supports SLI and also has customisable RAM speed and latency options)

CPU: Intel Core i7 4770K (LGA 1150) / Intel Core i5 4670K (LGA 1150) (basically, going with Haswell because I found Sandy/Ivy bridge to cost around the same amount of money so I thought I would go with Haswell for better overall performance)

GPU: 2GB Gigabyte NVIDIA GTX 670 2-way SLI (already have 1 GTX 670 now but considering going with another for 2-way SLI)

RAM: 16GB Corsair XMS3 DDR3 @1600Mhz

Soundcard: Creative Sound Blaster Fatal1ty Professional

PSU: Corsair TX650W (V1, not V2)



So the idea is, I have the RAM, 1 of the GPUs, sound card and PSU. I already sold my previous CPU and motherboard. The reason why I'm going with ASUS for the motherboard over Gigabyte is because my previous board was Gigabyte and I didn't really like it, it had some limitations on OC'ing due to my RAM config with the CPU.

While all the components are ok, I have 1 concern. According to the GPU PSU calculations on RealHardTechX, to run 2x GTX 670s in SLI needs a PSU with 750W (which is more than what my current PSU produces) but then when I use the PSU calculator says I only 615W and that's based on all components running at 100% load. So I'm confused, do I stick with my current PSU and it'll handle the 2 GTX 670s or do I need a more powerful PSU to run SLI? The build as it is, as it is Intel, is expensive for me so I'd prefer avoid spending on a new PSU but if it won't work without a more powerful PSU, I guess I'd have to consider it at a later date.