We found the Patriot Viper doesn't overclock quite as far as the G.Skill, and as such the speeds are a little lower, however it's only very slight. Generally the Patriot memory performance is very good and at stock speeds it basically matches the G.Skill GT1s in everything but raw copy performance.
The Elixir memory is naturally lower performing as its timings are slower and the total overclock is a great deal less at just 1,750MHz.
Everest Memory Latency Test
EVGA nForce 790i Ultra SLI
G.Skill F3-12800Cl7D-4GBPI (1940Mhz C9 OC)
G.Skill F3-14400CL8D-4GBGT1 (1800MHz C8)
G.Skill F3-14400CL8D-4GBGT1 (1940MHz C8 OC)
Patriot Viper PVS34G1800LLKN (1800MHz C8)
Patriot Viper PVS34G1800LLKN (1600MHz LL)
G.Skill F3-12800Cl7D-4GBPI (1600MHz C7)
Corsair CM3X2G1600C9DHX (1925MHz C9 OC)
G.Skill F3-14400CL8D-4GBGT1 (1600MHz C7 LL)
Patriot Viper PVS34G1800LLKN (1925MHz C9 OC)
Corsair CM3X2G1600C9DHX (1600MHz C7 LL)
Corsair CM3X2G1600C9DHX (1600MHz C9)
Elixir M2F2G64CB8HA4N-DG (1600MHz LL)
Elixir M2F2G64CB8HA4N-DG (1750MHz C9 OC)
Elixir M2F2G64CB8HA4N-DG (1600MHz C9)
DDR2 1066MHz C5 (Intel P45)
49.0
49.8
50.5
50.9
51.4
51.6
51.6
51.7
52.4
52.9
54.8
55.2
55.5
56.1
62.4
0
10
20
30
40
50
60
Nanoseconds (lower is better)
In terms of latency, the Patriot memory performs where we expect it to, although the Vipers at 1,800MHz C8 are a nanosecond slower than the G.Skill GT1s at the same timings. Both use the same Samsung HCF0 memory chips, so the differences are likely a system variable rather than memory.
Naturally the Elixir memory sits lower down the table as it offers a slower latency and a limited overclock.
Everest Memory Performance Test
Asus Rampage Extreme (Intel X48)
Patriot Viper PVS34G1800LLKN (1600MHz LL)
Patriot Viper PVS34G1800LLKN (1700MHz C8)
Patriot Viper PVS34G1800LLKN (1728MHz C9 OC)
Elixir M2F2G64CB8HA4N-DG (1720MHz C9 OC)
Corsair CM3X2G1600C9DHX (1760MHz C9 OC)
G.Skill F3-12800Cl7D-4GBPI (1740MHz C9 OC)
G.Skill F3-14400CL8D-4GBGT1 (1600MHz C6 LL)
G.Skill F3-12800Cl7D-4GBPI (1600MHz C6 LL)
G.Skill F3-14400CL8D-4GBGT1 (1740MHz C9)
Corsair CM3X2G1600C9DHX (1600MHz C7 LL)
G.Skill F3-12800Cl7D-4GBPI (1600MHz C7)
Corsair CM3X2G1600C9DHX (1600MHz C9)
Elixir M2F2G64CB8HA4N-DG (1600MHz LL)
Elixir M2F2G64CB8HA4N-DG (1600MHz C9)
DDR2 1066MHz C5 (Intel P45)
9772
8508
8840
9718
8970
9292
9667
9159
9340
9660
9098
9399
9643
9329
9476
9578
9331
9443
9492
8504
8862
9491
8425
8776
9486
9223
9327
9477
8428
8823
9394
8496
8910
9336
8087
8375
9140
8422
8710
9092
8401
8764
8439
8419
8408
0
2500
5000
7500
10000
MB/s (higher is better)
Read (MB/s)
Write (MB/s)
Copy (MB/s)
On the Asus Rampage Extreme the situation is a little different as the Patriot clearly tops the tables, although it's just by a small margin. The overclocked Elixir also shows good performance in read speeds, although it's fractionally slower in copy and write tests than the Corsair and G.Skill below it.
Everest Memory Latency Test
Asus Rampage Extreme (Intel X48)
Patriot Viper PVS34G1800LLKN (1600MHz LL)
Patriot Viper PVS34G1800LLKN (1700MHz C8)
Patriot Viper PVS34G1800LLKN (1728MHz C9 OC)
Elixir M2F2G64CB8HA4N-DG (1720MHz C9 OC)
Corsair CM3X2G1600C9DHX (1600MHz C7 LL)
G.Skill F3-12800Cl7D-4GBPI (1600MHz C6 LL)
G.Skill F3-14400CL8D-4GBGT1 (1600MHz C6 LL)
G.Skill F3-12800Cl7D-4GBPI (1600MHz C7)
Corsair CM3X2G1600C9DHX (1760MHz C9 OC)
G.Skill F3-12800Cl7D-4GBPI (1740MHz C9 OC)
Corsair CM3X2G1600C9DHX (1600MHz C9)
G.Skill F3-14400CL8D-4GBGT1 (1740MHz C9)
Elixir M2F2G64CB8HA4N-DG (1600MHz LL)
Elixir M2F2G64CB8HA4N-DG (1600MHz C9)
DDR2 1066MHz C5 (Intel P45)
54.1
55.0
56.2
56.3
56.6
56.7
56.7
57.1
57.2
57.4
57.6
58.0
59.5
59.7
62.4
0
10
20
30
40
50
60
Nanoseconds (lower is better)
In terms of latency performance the Patriot is again at the top of the table by a nice few nanosecond margin, even tough it doesn't overclock quite as much. The Elixir sits at the bottom of the table as we'd expect, but it's again not a huge margin of difference, and when overclocked it's latency is actually surprisingly low.