Question 1

dram cache?

Accepted Answer

NAND and Dram are different, do not believe this specific SSD has a DRAM chip, only a NAND one.

Question 2

Will this work in a dell optiplex 7010 and do i need to buy any SATA cables for this or could i just use the ones from my PSU?

Accepted Answer

A lot depends on what size drive is already in the optiplex 7010. The original specs say that you have 
Hard Drive
Interface Type    SATA 6Gb/s
Spindle Speed    7200 rpm
Type    HDD
Interface Class    Serial ATA
Installed Qty    1
Capacity    250 GB

So the original is already a SATA interface so you should not have any issues with the PSU connection or the SATA interface to the motherboard. 
I know the 7010 is a SFF box but I am not sure if the HDD is a 3.5 or a 2.5 size. If anything if the original is a 3.5" you may need an adapter tray (2.5 Inch to 3.5 Inch Bay Drive Converter Kit)to secure the new BX500 in place.
My final comment is the size of the SSD. It will be faster but the one quoted is half the size of your original. You should be looking for the BX500 in the 240GB or larger size.
Happy computing.

Question 3

Will this work in a dell optiplex 7010 and do i need to buy any SATA cables for this or could i just use the ones from my PSU?

Accepted Answer

Yes. I have an optiplex 7010 as well and you can use the SATA cable from the PSU

Brand	Crucial
Series	BX500
Model	CT120BX500SSD1
Device Type	Internal Solid State Drive (SSD)
Used For	Consumer

Form Factor	2.5"
Capacity	120GB
Memory Components	3D NAND
Interface	SATA III

Max Sequential Read	Up to 540 MBps
Max Sequential Write	Up to 500 MBps
MTTF	1.5M hours

Power Consumption (Active)	Average Active Power (mW): 60 Max Read Operating (mW): 3000 Max Write Operating (mW): 3000
Operating Temperature	0°C ~ +70°C

Height	7.00mm
Width	69.85mm
Depth	100.33mm

Crucial BX500 120GB 3D NAND SATA 2.5-Inch Internal SSD, up to 540 MB/s - CT120BX500SSD1

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Item#: N82E16820156186