Notebookcheck Logo

Intel Core i5-1135G7 vs Intel Core i5-8259U

Intel Core i5-1135G7

► remove from comparison Intel i5-1135G7

The Intel Core i5-1135G7 is a quad-core, mid-range SoC designed to be used in ultra-light laptops. The Tiger Lake-UP3 processor was introduced in September 2020. It features four Willow Cove CPU cores running at 2.4 GHz (base clock speed @ 28 W TDP) Boosting up to 4.2 GHz (1-core Boost). The all-core Boost clock speed sits at 3.8 GHz. This is a Hyper-Threading-enabled CPU, allowing for up to 8 concurrent processing threads.


A sizeable performance-per-MHz boost is one of the multiple strengths of Tiger Lake compared to the older Ice Lake and Comet Lake product families. Core i5-1135G7 is compatible with dual-channel DDR4-3200 or quad-channel LPDDR4x-4267 RAM, supports PCI-Express 4.0 (4 lanes) and is capable of HW-accelerating AI workloads. Thunderbolt 4, USB 4 and Wi-Fi 6 support is partially baked into the chip. Four PCI-Express 4.0 lanes allow for read/write rates of up to 7.9 GB/s, provided a suitably fast NVMe SSD is used.

The i5 is manufactured on Intel's second-gen 10 nm process marketed as SuperFin that is supposedly comparable to TSMC's 7 nm process that Ryzen 4000 series laptop-grade processors are manufactured on. Both the CPU cores and the iGPU enjoy access to 8 MB of L3 cache. The higher-end Core i7-11x5 parts are notable for their larger Level 3 cache (12 MB versus 8 MB), faster iGPUs and higher clock speeds. Core i5-1135G7 is supposed to be permanently soldered to the motherboard (BGA1449 socket interface) and is thus not user-replaceable.


The i5's long-term Boost sustainability will depend heavily on how high the Power Limits and how good the cooling solution of a laptop are. That being said, the average Core i5-1135G7 in our database is just as fast as the Core i5-10400H, Core i5-8300H, and Ryzen 7 3700U in multi-core benchmarks. The CPU acts even nicer when under single-core load, reaching similar heights as the Ryzen 7 5600X and Core i7-8700K. The performance may not be ground-breaking, but it’s still on the sunnier side. This Core i5 will have no difficulty coping with some light gaming and video editing on the go, and the more mundane tasks including the usual web browsing and spreadsheet editing will pose no problem, either.


The 80 EU Iris Xe Graphics G7 is based on Intel's Gen 12 architecture. The iGPU is somewhat faster than the older Iris Plus G7 (Ice Lake) and much faster than the UHD 620 (Comet Lake). The 80 EUs are clocked at 400 MHz to 1,300 MHz. This graphics adapter can drive up to 4 monitors in resolutions up to SUHD [email protected] and hardware decode the AVC, HEVC, VP9 and last but not the least AV1 video streams. The iGPU's gaming performance is close to what a typical GeForce MX250 has in store; casual gamers will be happy with the Xe as it will easily handle most titles at 720p on low or medium quality settings. An important thing to keep in mind is that the iGPU has no video memory of its own, making fast RAM a necessity.

Power Consumption

The Core i5's 10 nm manufacturing process and low core count render it relatively energy-efficient. Just like all other Tiger Lake-UP3 processors, Core i5-1135G7 has a long-term Power Limit of 12 W to 28 W (OEMs get to set the value according to their needs). This makes the i5 a good fit for thinner, lighter systems as well as an occasional Windows tablet. The CPU's long-term performance sustainability is likely to be very poor in passively cooled setups.

Intel Core i5-8259U

► remove from comparison

The Intel Core i5-8259U is a quad-core SoC for notebooks based on the Coffee Lake architecture and was announced in April 2018. Compared to its predecessor Core i5-7267U, the CPU is now a quad-core with Hyperthreading support for the execution of up to 8 threads simultaneously. The base frequency is 2.3 GHz, but the Turbo goes all the way up to 3.8 GHz. It is also equipped with an Intel Iris Plus Graphics 655 GPU with 128 MB eDRAM, a dual-channel memory controller (DDR4) as well as VP9 and H.265 video decoding as well as encoding. The chip is still manufactured in a 14nm process with FinFET transistors.

Compared to faster Core i5 and i7 models with eDRAM and 28 Watts, the i5-8259U only features 6 MB smart cache and the slowest clock of the Iris Plus GPU.


Intel basically uses the same micro architecture compared to Kaby Lake, so the per-MHz performance does not differ. The manufacturer only reworked the Speed Shift technology for faster dynamic adjustments of voltages and clocks, and the improved 14nm process allows much higher frequencies combined with better efficiency than before.


Considering the clocks of the Core i5-8259U, its performance should be between the 15W models Core i5-8350U and Core i7-8550U. The i5-8259U should still be faster than the i7-8550U in practice thanks to the increased TDP, especially during sustained workloads.


The integrated Intel Iris Plus 655 Graphics is the GT3e model of the Kaby Lake GPU (Intel Gen. 9.5). It has 48 Execution Units running at 300-1050 MHz (slowest clock of the 655, the fastest is 1200 MHz in combination with the i7-8559U) and the performance is comparable to a GeForce 930M or 940MX thanks to fast eDRAM cache. However, there aren't any significant improvements compared to the old Iris Plus 650, so modern games can often not be played smoothly or only at the lowest or medium settings, respectively.

Contrary to Skylake, Kaby lake now also supports H.265/HEVC Main 10 with a 10-bit color depth as well as Google's VP9 codec. The dual-core Kaby Lake processors announced in January should also support HDCP 2.2.

Power Consumption

The chip is manufactured in an improved 14nm process with FinFET transistors, which improves the efficiency even further. Intel specifies the TDP with 28 Watts, which can be reduced to 23 Watts (cTDP Down) depending on the usage scenario. The TDP is pretty high compared to the common 15-Watt TDP for quad-core processors, but allows a better utilization of CPU and GPU Turbo.

ModelIntel Core i5-1135G7Intel Core i5-8259U
SeriesIntel Tiger LakeIntel Coffee Lake
CodenameTiger Lake UP3Coffee Lake-U
Series: Coffee Lake Coffee Lake-U
Intel Core i7-1195G7 compare2.9 - 5 GHz4 / 812 MB
Intel Core i7-1185G7 compare3 - 4.8 GHz4 / 812 MB
Intel Core i7-1165G7 compare2.8 - 4.7 GHz4 / 812 MB
Intel Core i5-1155G7 compare2.5 - 4.5 GHz4 / 88 MB
Intel Core i5-1145G7 compare2.6 - 4.4 GHz4 / 88 MB
» Intel Core i5-1135G72.4 - 4.2 GHz4 / 88 MB
Intel Core i3-1125G4 compare2 - 3.7 GHz4 / 88 MB
Intel Core i3-1115G4 compare3 - 4.1 GHz2 / 46 MB
Intel Core i7-8559U compare2.7 - 4.5 GHz4 / 88 MB
Intel Core i7-8557U compare1.7 - 4.5 GHz4 / 88 MB
Intel Core i5-8269U compare2.6 - 4.2 GHz4 / 86 MB
Intel Core i5-8279U compare2.4 - 4.1 GHz4 / 86 MB
» Intel Core i5-8259U2.3 - 3.8 GHz4 / 86 MB
Intel Core i5-8257U compare1.4 - 3.9 GHz4 / 86 MB
Intel Core i3-8109U compare3 - 3.6 GHz2 / 44 MB
Clock2400 - 4200 MHz2300 - 3800 MHz
L1 Cache320 KB256 KB
L2 Cache5 MB1 MB
L3 Cache8 MB6 MB
Cores / Threads4 / 84 / 8
TDP28 Watt28 Watt
Technology10 nm14 nm
max. Temp.100 °C100 °C
FeaturesDL Boost, GNA, Wi-Fi 6 (Gig+), Thunderbolt 4, DDR4-3200 / LPDDR4x-4266Dual-Channel DDR4 Memory Controller, HyperThreading, AVX, AVX2, Quick Sync, Virtualization, AES-NI, Intel SSE4.1, Intel SSE 4.2
iGPUIntel Iris Xe Graphics G7 80EUs (400 - 1300 MHz)Intel Iris Plus Graphics 655 (300 - 1050 MHz)
ManufacturerIntel Tiger Lake i5-1135G7Intel Coffee Lake i5-8259U


Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - i5-1135G7
42 pt (49%)
Performance Rating - CB R15 + R20 + 7-Zip + X265 + Blender + 3DM11 CPU - i5-8259U
35.8 pt (42%)
Cinebench R23 - Cinebench R23 Multi Core
min: 2786     avg: 4705     median: 4982 (8%)     max: 6136 Points
min: 3592     avg: 3734     median: 3714 (6%)     max: 3917 Points
Cinebench R23 - Cinebench R23 Single Core
min: 1062     avg: 1319     median: 1345 (67%)     max: 1373 Points
min: 973     avg: 981     median: 980 (49%)     max: 991 Points
Cinebench R20 - Cinebench R20 CPU (Single Core)
min: 375     avg: 506     median: 515 (66%)     max: 527 Points
min: 369     avg: 379.5     median: 381.5 (49%)     max: 386 Points
Cinebench R20 - Cinebench R20 CPU (Multi Core)
min: 979     avg: 1819     median: 1854.5 (8%)     max: 2382 Points
min: 1385     avg: 1450     median: 1451.5 (6%)     max: 1512 Points
Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
min: 431     avg: 792     median: 822 (8%)     max: 925 Points
min: 575     avg: 620     median: 611.5 (6%)     max: 687 Points
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
min: 141.4     avg: 194.3     median: 198 (68%)     max: 205 Points
min: 132     avg: 147.3     median: 151 (52%)     max: 154 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
min: 9.29     avg: 9.5     median: 9.5 (18%)     max: 9.72 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
min: 2.33     avg: 2.3     median: 2.3 (67%)     max: 2.36 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
min: 8116     avg: 8157     median: 8157 (73%)     max: 8198 Points
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
min: 25271     avg: 26244     median: 26243.5 (36%)     max: 27216 Points
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
37000 Points (33%)
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
10515 Points (64%)
wPrime 2.10 - wPrime 2.0 1024m *
231.3 s (3%)
wPrime 2.10 - wPrime 2.0 32m *
6.5 s (1%)
WinRAR - WinRAR 4.0
min: 5283     avg: 7330     median: 7330 (42%)     max: 9377 Points
7-Zip 18.03 - 7-Zip 18.03 Multli Thread 4 runs
min: 14745     avg: 21421     median: 21892.5 (15%)     max: 24873 MIPS
min: 17799     avg: 21188     median: 19407 (14%)     max: 28824 MIPS
7-Zip 18.03 - 7-Zip 18.03 Single Thread 4 runs
min: 3924     avg: 4676     median: 4734.5 (68%)     max: 4921 MIPS
min: 3951     avg: 3988     median: 3981 (57%)     max: 4022 MIPS
X264 HD Benchmark 4.0 - x264 Pass 2
46.1 fps (21%)
38.5 fps (17%)
X264 HD Benchmark 4.0 - x264 Pass 1
199.5 fps (54%)
162.3 fps (44%)
HWBOT x265 Benchmark v2.2 - HWBOT x265 4k Preset
min: 3.57     avg: 5.9     median: 6 (13%)     max: 7.6 fps