I have some ethers in a Geth wallet that I'm trying to transfer to an exchange, but the problem I have is fast sync is downloading 1 or 2 blocks every 10 to 15 seconds and I'm only up to 4,225,189. Basically, it's running so slow on an SSD and 100MBps internet connection that I cannot ever sync I tried to transfer the ethers and got a response hash message, but the ethers never ended up on the exchange.
I assume I need a fully synced Geth to transfer anything out of it? That's completely impossible to achieve.
Is it possible to somehow move the ethers to another Ethereum client by way of the private key?