Is My HDD Performing as Expected? I did some tests, but can't work out what the results mean.

I have a model: Seagate 3.5" Barracuda 1TB ST31000524AS SATA3 7200RP (this one I think? http://www.newegg.com/Product/Product.aspx?Item=N82E16822148697) - since 2011.

I have stuttering in The Witcher 3, and I wondered if it has anything to do with my hard drive.

I did some tests, but I'm not very clever in working out if I am performing as expected. I was wondering if anyone with expertise would help me out and decipher whether my drive is OK from these results?

Supposedly this drive is as fast as 6.0Gb/s, but I don't see numbers like that anywhere in the results.

I used CrystalDiskMark 4.0.3 x64, HD TUNE and Windows Check Disk

I ran these programs seperately and in isolation without using the computer.

Here are my results,

Thank you kindly in advance for any help or assistance

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CrystalDiskMark 4.0.3 x64 (C) 2007-2015 hiyohiyo
Crystal Dew World : http://crystalmark.info/
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* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes

Sequential Read (Q= 32,T= 1) : 105.038 MB/s
Sequential Write (Q= 32,T= 1) : 63.230 MB/s
Random Read 4KiB (Q= 32,T= 1) : 0.693 MB/s [ 169.2 IOPS]
Random Write 4KiB (Q= 32,T= 1) : 0.809 MB/s [ 197.5 IOPS]
Sequential Read (T= 1) : 104.021 MB/s
Sequential Write (T= 1) : 63.342 MB/s
Random Read 4KiB (Q= 1,T= 1) : 0.642 MB/s [ 156.7 IOPS]
Random Write 4KiB (Q= 1,T= 1) : 0.822 MB/s [ 200.7 IOPS]

Test : 1024 MiB [C: 58.3% (542.8/931.4 GiB)] (x3)
Date : 2015/05/26 23:45:28
OS : Windows 7 Home Premium SP1 [6.1 Build 7601] (x64)

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HD TUNE:
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HD Tune: ST31000524AS Benchmark

Transfer Rate Minimum : 45.9 MB/sec
Transfer Rate Maximum : 124.4 MB/sec
Transfer Rate Average : 95.7 MB/sec
Access Time : 15.1 ms
Burst Rate : 249.8 MB/sec
CPU Usage : -1.0%

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CHKDSK
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Checking file system on C:
The type of the file system is NTFS.

A disk check has been scheduled.
Windows will now check the disk.

CHKDSK is verifying files (stage 1 of 5)...
Cleaning up instance tags for file 0x256c4.
455680 file records processed. File verification completed.
3006 large file records processed. 0 bad file records processed. 0 EA records processed. 51 reparse records processed. CHKDSK is verifying indexes (stage 2 of 5)...
The first free byte, 0x28, and bytes available, 0x90, for
root index $I30 in file 0x89f3 are not equal.
548818 index entries processed. Index verification completed.
0 unindexed files scanned. 0 unindexed files recovered. CHKDSK is verifying security descriptors (stage 3 of 5)...
455680 file SDs/SIDs processed. Cleaning up 2271 unused index entries from index $SII of file 0x9.
Cleaning up 2271 unused index entries from index $SDH of file 0x9.
Cleaning up 2271 unused security descriptors.
CHKDSK is compacting the security descriptor stream
46570 data files processed. CHKDSK is verifying Usn Journal...
34727768 USN bytes processed. Usn Journal verification completed.
CHKDSK is verifying file data (stage 4 of 5)...
455664 files processed. File data verification completed.
CHKDSK is verifying free space (stage 5 of 5)...
101913577 free clusters processed. Free space verification is complete.
CHKDSK discovered free space marked as allocated in the
master file table (MFT) bitmap.
Correcting errors in the Volume Bitmap.
Windows has made corrections to the file system.

976657407 KB total disk space.
568238160 KB in 298690 files.
178020 KB in 46573 indexes.
0 KB in bad sectors.
586915 KB in use by the system.
65536 KB occupied by the log file.
407654312 KB available on disk.

4096 bytes in each allocation unit.
244164351 total allocation units on disk.
101913578 allocation units available on disk.

Internal Info:
00 f4 06 00 2f 3d 05 00 5e 68 09 00 00 00 00 00 ..../=..^h......
8d 1f 00 00 33 00 00 00 00 00 00 00 00 00 00 00 ....3...........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................

Windows has finished checking your disk.
Please wait while your computer restarts.