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XFX nForce 780i SLI

Memory Performance:


Everest Memory Performance Test

Single GeForce 8800 GT

  • XFX nForce 780i SLI
  • Nvidia nForce 680i SLI
  • Abit IX38 Quad GT
    • 8878
    • 6082
    • 8798
    • 6082
    • 6835
    • 6076
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
MB/s
  • Memory Read
  • Memory Write

Everest Memory Latency Test

Single GeForce 8800 GT

  • XFX nForce 780i SLI
  • Nvidia nForce 680i SLI
  • Abit IX38 Quad GT
  • 56.9
  • 57.1
  • 69.8
0
10
20
30
40
50
60
70
nanoseconds (lower is better)

The memory performance of the latest nForce 780i SLI board is unsurprisingly very similar to that of the nForce 680i SLI - in fact there's only a fraction difference in favour of the 780i in read speed, but both write speeds were consistently identical. The Abit IX38 Quad GT on the other hand had a similar write performance but a very poor read speed, even though it was running faster memory timings.

Memory Bandwidth

Sisoft Sandra Unbuffered Memory Test

  • XFX nForce 780i SLI
  • Nvidia nForce 680i SLI
  • Abit IX38 Quad GT
  • 5736.0
  • 5732.0
  • 6080.7
0
1000
2000
3000
4000
5000
6000
MB/s

Memory Latency

Sisoft Sandra Random Memory Latency Test

  • XFX nForce 780i SLI
  • Nvidia nForce 680i SLI
  • Abit IX38 Quad GT
  • 74
  • 75
  • 84
0
10
20
30
40
50
60
70
80
90
nanoseconds (lower is better)

However, Sisoft Sandra XII tells a completely different story in favour of the X38 Abit board where it also points out the increased latency of the Abit but thinks it still has a ~300MB/s performance advantage. Again, both nForce 780i SLI and 680i SLI show virtually identical raw performance results.

Drive Performance:

A 150GB Western Digital Raptor-X (WD1500AHFD) hard drive was used for SATA testing. We recorded the average read speeds in all cases using HD Tach 3.0.1.0's 8MB zone test.

SATA Hard Drive Performance

HDTach 3.0.1.0, 8MB Zone Test, Average Read

  • XFX nForce 780i SLI
  • Nvidia nForce 680i SLI
  • Abit IX38 Quad GT
  • 75.4
  • 75.4
  • 75.4
0
10
20
30
40
50
60
70
80
MB/s

Using a more recent Western Digital Raptor-X hard drive we now see all the boards perform identically in raw write speed performance. Neither nForce 780i SLI or 680i SLI has dedicated eSATA ports on board though, however the nForce 780i SLI does have a BIOS option to convert an internal SATA port to external SATA - however there are no extra ports like on the Abit and nothing provided in the box to convert them.